User manual | 7742852-VOLVO-PENTA-DBMOTEURS-DB

Workshop Manual

2(0)

D49A MS, D49A MT

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Marine Engines

D49A MS/MT

Safety Information ................................................. 5

Warning labels ....................................................... 8

General Information ............................................ 10

Presentation ........................................................ 16

Identification numbers ......................................... 18

Specifications ...................................................... 19

Maintenance Standards Table ............................. 22

Tightening torques ............................................... 39

Sealants and Lubricants Table ............................ 45

Special Tools ....................................................... 46

Determination of overhaul timing ...................... 49

Adjustment and Benchtesting ............................ 50

Engine auxiliaries removal ................................. 60

Engine auxiliaries installation ............................ 71

Group 21:Engine Body

Cylinder heads and valve mechanism

Disassembly ........................................................ 75

Inspection and Repair .......................................... 78

Reassembly ......................................................... 85

Cylinder liners, Pistons and Connecting rods

Disassembly ........................................................ 89

Inspection and Repair .......................................... 93

Reassembly ....................................................... 102

Viscous damper and front gears

Disassembly ...................................................... 106

Inspection and Repair ........................................ 109

Reassembly ....................................................... 111

Oil pan and Oil strainer ...................................... 113

Flywheel, Timing gears, and Camshaft

Disassembly ...................................................... 115

Inspection and Repair ........................................ 118

Reassembly ....................................................... 122

Crankcase, Crankshaft and Main bearings

Disassembly ...................................................... 126

Inspection and Repair ........................................ 128

Reassembly ....................................................... 135

Group 22:Lubrication system

Oil Pump and Safety Valve

Disassembly ...................................................... 137

Inspection .......................................................... 138

Reassembly ....................................................... 140

Oil filter, Relief Valve,Left Cooler and Thermostat

Disassembly ...................................................... 141

Inspection .......................................................... 142

Reassembly ....................................................... 143

Right Side Oil Cooler and Oil Thermostat

Disassembly ...................................................... 144

Inspection .......................................................... 144

Reassembly ....................................................... 144

Group 23:Fuel System

Fuel Filters

Disassembly ...................................................... 145

Reassembly ....................................................... 146

Fuel Injectors

Disassembly ...................................................... 147

Inspection and Adjustment ................................ 148

Reassembly ....................................................... 150

Fuel Injection Pump

Disassembly ...................................................... 151

Inspection .......................................................... 157

Reassembly ....................................................... 160

Adjustment of Injection Timing ........................... 169

Feed Pump

Disassembly ...................................................... 171

Reassembly ....................................................... 172

Testing .............................................................. 172

PSG Woodward Governor and Drive

Disassembly ...................................................... 173

Inspection .......................................................... 174

Reassembly ....................................................... 175

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Group 25:Inlet and Exhaust System

Air Cooler

Disassembly ...................................................... 176

Inspection .......................................................... 177

Turbocharger ..................................................... 178

Disassembly ...................................................... 179

Inspection .......................................................... 182

Reassembly ....................................................... 184

Group 26:Cooling System

Fresh Water Pump

Disassembly ...................................................... 191

Inspection .......................................................... 193

Reassembly ....................................................... 194

Thermostats ...................................................... 196

Heat Exchanger ................................................. 197

Raw Water Pump

Disassembly ...................................................... 198

Inspection .......................................................... 199

Reassembly ....................................................... 200

Group 30:Electrical System

Starter

Disassembly ...................................................... 203

Inspection and Repair ........................................ 206

Reassembly ....................................................... 210

Alternator

Disassembly ...................................................... 213

Inspection and repair ......................................... 214

Reassembly ....................................................... 214

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Safety information

Safety Information

Introduction

The Manual contains technical data, descriptions, and repair instructions for the designated Volvo Penta engines or engine versions. Make sure that the correct workshop literature is used.

Read the following safety information and the General Information and Repair Instructions in the Workshop Manual carefully before starting service work.

Important

The following special warning symbols are used in the Workshop Manual and on the engine.

WARNING! Warns of risk of bodily injury, serious damage to product or property, or that a serious malfunction can occur if the instructions are not followed.

IMPORTANT! Used to attract attention to things that can cause damage or malfunction to product or property.

NOTE! Used to attract attention to important information, to simplify work procedures or handling.

The following list provides an overview of the risks and cautionary procedures that should always be observed.

Prevent the engine from being started by disconnecting the power with the main switch

(switches) and locking it (them) in the disconnected position. Post warning signs stating

“Work in progress!” in every position from wich the engine can be started.

Maintenance and service should be performed on a stationary engine. However, some procedures, e.g. certain adjustments, require the engine to be running. Approaching an engine that is running is a safety risk. Remember that loose clothes or long hair can fasten in rotating parts and cause severe injury.

A careless movement or dropped tool while working in the vicinity of an engine that is running, can in the worst case lead to injury. Observe caution with hot surfaces (exhaust pipe, turbo, charge air pipe, starter element etc.) and hot fluids in the lines and hoses of an engine that is running, or has just been stopped. Refit all guards dismantled during service work before starting the engine.

Make sure that the warning or information decals on the product are always clearly visible.

Replace labels that have been damaged or painted over.

Never start the engine unless the air filter is fitted. The rotating compressor wheel in the turbo can cause severe injury. Foreign objects in the inlet pipe can also damage the machine.

Never use starter spray or the like. Risk of in the inlet pipe. Risk of personal injury.

Avoid opening the coolant filler cap when the engine is hot. Steam or hot coolant can spray out, and built up pressure will be lost. Open the filler cap slowly and release the overpressure in the cooling system if the filler cap or cock must be opened, or if a plug or coolant pipe must be removed when the engine is hot. Steam or hot coolant can flow out in an unpredicted direction.

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Safety information

Hot oil can cause burn injuries. Avoid skin contact with hot oil. Make sure that the oil system is not pressurised before working on it. Never start, or run the engine with the oil filler cap removed due to the risk of ejecting oil.

Stop the engine and close the bottom valve before working on the cooling system.

Only start the engine in a well-ventilated area.

Exhaust fumes and crankcase gases should be bled out of the engine compartment or workshop when working in closed environments.

Always use protective glasses for work where there is a risk of splintering, sparks, or splashing of acid or other chemicals. The eyes are extremely sensitive, and an injury could cause blindness!

Avoid skin contact with oil! Prolonged or frequent skin contact with oil can degrease the skin, resulting in irritation, drying out, eczema, and other skin complaints. Used oil is more dangerous than new oil from a health care point of view. Use protective gloves and avoid oildrenched clothes and rags. Wash your hands regularly, especially before meals. Use special hand cream to counteract drying out, and to simplify cleaning the skin.

The majority of chemicals intended for the product (e.g. engine and timing gear oils, glycol, petrol and diesel oil) or chemicals for workshop use (e.g. degreasing agent, enamels and solvents) are hazardous to health. Read the instructions on the pack carefully. Always follow the given safety instructions (e.g. the use of breathing protection, protective glasses, or gloves, etc.) Make sure that other personnel are not exposed to hazardous substances, e.g. by inhaling the air. Make sure there is adequate ventilation. Handle consumed and surplus chemicals in the prescribed manner.

Observe extreme caution when tracing fuel leaks in fuel systems and when testing fuel nozzles. Wear protective glasses. The jet from a fuel nozzle has a very high pressure and penetrating force. The fuel can penetrate deeply into bodily tissue and cause serious injury. Risk of blood poisoning.

All fuels, as well as many chemicals, are inflammable. Make sure no naked flames or sparks can cause ignition. Petrol, certain thinners, and hydrogen from batteries are extremely inflammable and explosive when mixed with air.

Smoking is prohibited! Ventilate well and take the necessary precautions before welding or grinding in the immediate vicinity. Always have a fire extinguisher handy in the workshop.

Make sure that rags drenched in oil and petrol, including old fuel and lubricant filters, are stored safety. Oil drenched rags can in certain conditions self-ignite. Old fuel and oil filters are environmentally hazardous waste, and together with spent lubricant, contaminated fuel, paint residue, solvent, degreasing agent and suds, should be handed in to a waste-handling unit for destruction.

Batteries must never be exposed to naked flames or electrical sparks. Never smoke in the vicinity of batteries. Hydrogen develops when batteries are charged, which in combination with air forms an explosive gas. This gas is highly inflammable and very explosive. One spark from connecting the batteries incorrectly is sufficient to cause the battery to explode and cause injury. Do not touch the connection when starting (risk of spark) and do not lean over the batteries.

Never confuse the plus and minus terminals when fitting the batteries. This can cause serious damage to the electrical equipment. Check the wiring diagram.

Always use protective glasses when charging and handling batteries. The battery electrolyte contains strongly corrosive sulphuric acid. Upon contact with the skin, wash with soap and plenty of water. If battery acid gets into the eyes, rinse immediately with water, and contact a doctor without delay.

Stop the engine and turn off the power with the main switch (switches) before working on the electrical system.

The clutch should be adjusted when the engine is idle.

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Use the lifting hooks mounted on the engine/reversing gear when lifting the drive unit. Always check that the lifting equipment is in good condition and has the correct capacity for the lift

(weight of engine plus reversing gear and extra equipment where appropriate).

For safe handling, and to avoid damaging the components mounted on top of the engine, the engine should always be lifted with a lifting bar adjusted to the engine. All chains or wires should run in parallel with each other and as perpendicular to the top of the engine as possible. Special lifting equipment may be required to ensure the right balance and safe handling if other equipment connected to the engine alters its centre of gravity.

Never work on an engine supported only by lifting equipment.

Never work alone when heavy components are to be dismantled, even when safe lifting (e.g.

lockable block and tackle) equipment is used. In most cases, two persons are required even when lifting equipment is used: one to handle the equipment and one to make sure that components are not damaged. When working onboard a boat always make sure in advance that there is sufficient space to allow dismantling in situ, without the risk of personal injury or material damage.

Safety information

WARNING! The components in the electrical system and fuel system on Volvo Penta products are designed and manufactured to minimise the risks of explosion and fire. The engine must not be run in environments surrounded by explosive media.

Pressure pipes must not bent, turned, or exposed to other strain. Replace damaged pressure pipes.

Observe the following when cleaning with highpressure wash: Never point the jet of water at seals, rubber hoses, or electrical components.

Never use the high-pressure function when washing the engine.

Always use Volvo Penta recommended fuel.

See the instruction manual. The use of inferior quality fuel could damage the engine. The use of inferior fuel in a diesel engine could cause the control rod to jam and the engine to overspeed, with the risk of personal injury or damage to the machine. Inferior fuel can also lead to higher maintenance costs.

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Safety information

Warning labels D49A MS

The engine carries ‘Warning Labels’ at places where you are required to pay special attention. Please read them carefully and make sure you understand the content of each label and the meaning of their position.

Make sure the labels are legible. If you find any letter or picture illegible in a label, remove soil from the label, or replace it.

Clean the label with cloth and water or cleanser. Do not use organic solvent or gasoline, this would dissolve the label’s adhesive and cause the label to fall off.

If any label is damaged, lost or illegible, replace it. When replacing a label, make sure the new label is identical to the old one. For new labels, please contact your dealer.

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Safety information

Warning labels D49A MT

Make sure the labels are legible. If you find any letter or picture illegible in a label, remove soil from the label, or replace it.

Clean the label with cloth and water or cleanser. Do not use organic solvent or gasoline, this would dissolve the label’s adhesive and cause the label to fall off.

If any label is damaged, lost or illegible, replace it. When replacing a label, make sure the new label is identical to the old one. For new labels, please contact your dealer.

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General information

General Information

About the Workshop Manual

This Workshop Manual contains technical information, descriptions, and instructions for the standard versions of the D49A MS and D49A MT engines. The engine designation and numbers are to be found on the engine identification plate, refer to section “Identification numbers”. The motor designation and number should always be given during all correspondence with Volvo Penta.

The Workshop Manual is primarily produced for Volvo Penta service workshops and their qualified personnel. It is therefore assumed that persons using this manual have a basic knowledge of marine drive systems, and are able to carry out the related mechanical and electrical nature. Volvo Penta is continuously developing their products. We therefore reserve the right to make changes. All the information contained in this book is based on product data available prior to publication. Any essential changes or modifications in production or updated or revised service methods introduced after publication will be communicated by means of Service Bulletins.

Spare parts

Spare parts for the electrical and fuel systems are subject to different national safety requirements, e.g. U.S.

Coast Guard Safety Regulations. Volvo Penta Genuine Spare Parts comply with these requirements. All types of damage resulting from the use of non genuine Volvo Penta spare parts for the product in question will not be regulated by the warranty undertakings of Volvo Penta.

Certified engines

For service and repair on an engine certificated for any area where exhaust emissions are regulated by law, the following is important:

Certification means that an engine type is inspected and approved by the authorities. The engine manufacturer guarantees that all engines manufactured of that type correspond to the certified engine.

This places special requirements on maintenance and service as follows:

The maintenance and service intervals recommended by Volvo Penta must be observed.

Only genuine Volvo Penta replacement parts may be used.

The service of injection pumps and injectors or pump settings must always be carried out by an authorized

Volvo Penta workshop.

The engine must not be modified in any way except with accessories and service kits approved by Volvo

Penta.

No modifications to the exhaust pipes and air supply ducts for the engine may be undertaken.

Seals may only be broken by authorized personnel.

Otherwise the general instructions contained in the Operator’s manual concerning operation, service and maintenance must be followed.

IMPORTANT! Neglected or deficient maintenance/service and the use of non-original spare parts will entail

Volvo Penta renouncing any responsibility for the engine corresponding to the certified version. Volvo Penta will not compensate for damage and/or costs arising from the above.

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General information

Repair instructions

The working methods described in the Service Manual apply to work carried out in a workshop. The engine has been removed from the boat and is installed in an engine fixture. Unless otherwise stated reconditioning work which can be carried out with the engine in place follows the same working method.

Warning symbols occurring in the Workshop Manual (refer to section “Safety information”) are not in any way comprehensive since it is impossible to predict every circumstance under which service work or repairs may be carried out. For this reason we can only highlight the risks that can arise when work is carried out incorrectly in a well-equipped workshop using working methods and tools developed by us.

All procedures for which there are Volvo Penta special tools in this Workshop Manual are carried out using these. Special tools are developed to rationalize working methods and make procedures as safe as possible. It is therefore the responsibility of any person using tools or working methods other than the ones recommended by us to ensure that there is no danger of injury, damage or malfunction resulting from these.

In some cases there may be special safety precautions and instructions for the use of tools and chemicals contained in this Workshop Manual. These special instructions should always be followed if there are no separate instructions in the Workshop Manual.

Certain elementary precautions and common sense can prevent most risks arising. A clean workplace and engine eliminates much of the danger of injury and malfunction.

It is of the greatest importance that no dirt or foreign particles get into the fuel system, cooling system, lubrication system, intake system, turbocharger, bearings and seals when they are being worked on. The result can be malfunction or a shorter operational life.

Our joint responsibility

Each engine consists of many connected systems and components. If a component deviates from its technical specification the environmental impact of an otherwise good engine may be increased significantly. It is therefore vital that wear tolerances are maintained, that systems that can be adjusted are adjusted properly and that Volvo

Penta Genuine Parts as used. The engine Maintenance Schedule must be followed.

Some systems, such as the components in the fuel system, require special expertise and special testing equipment for service and maintenance. Some components are sealed at the factory for environmental reasons. No work should be carried out on sealed components except by authorized personnel.

Bear in mind that most chemicals used on boats are harmful to the environment if used incorrectly. Volvo Penta recommends the use of biodegradable degreasing agents for cleaning engine components, unless otherwise stated in a workshop manual. Take special care when working on-board, that oil and waste is taken for destruction and is not accidentally pumped into the environment with bilge water.

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General information

How to Use This Manual

Parts in illustrations are numbered to correspond with references to these numbers in text.

Items or conditions to be inspected during disassembly are listed in the disassembled views.

Maintenance standards for inspection and repair are described in text where relevant. For a quick summary of maintenance standards refer to section “Maintenance Standards” of this manual.

The sequence in which parts are to be reassembled is summarized below each assembled view.

Such as:

Tightening torque under wet conditions is indicated as “(wet)” in text, drawings, and tables. When so indicated, apply engine oil to the threaded portion of the fastener. Unless indicated as (wet), the tightening torque should be dry.

Terms used in this manual

Before you read this manual, note that the following special terms are used in dimensional and other specifications.

Assembly standard

Indicates the dimension of a part, the dimension to be attained at the time of reassembly or the standard performance.

Norminal value

Indicates the standard dimension of a part.

Repair limit

A part which has reached this limit must be repaired.

Service limit

A part which has reached this limit must be replaced.

Standard clearance

Indicates the clearance to be obtained between mating parts at reassembly.

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General information

Disassembly and Reassembly

This service manual covers recommended procedures to be followed when servicing diesel engines. It also contains information on special tools required and basic safety precautions.

It is the responsibility of service personnel to be familiar with these requirements, precautions, and potential hazards and to discuss these points with their foreman or supervisor.

Study this manual carefully and observe the following general precautions to prevent serious personal injury and to avoid damage to the engine, equipment, and parts.

WARNING! Use the correct tools and instruments. Serious injury or damage to the engine can result from using the wrong tools and instruments

WARNING! When lifting or carrying heavy parts, get someone to help you if the part is too awkward for one person to handle. Use jacks and chain blocks when necessary.

IMPORTANT! Use an overhaul stand or work bench if necessary.

IMPORTANT! Always read the Service Bulletins to learn about changes in procedures and/or technical data.

NOTE! Pay attention to the marks on assemblies, components, and parts for positions or directions. Put on your own marks, if necessary, to aid reassembly.

NOTE! Carefully check each part for faults during removal or cleaning. Signs of abnormal wear will tell if parts or assemblies are functioning improperly.

NOTE! Use assembly bins to keep the parts in order of removal and lay down disassembled or cleaned parts in the order in which they were removed. This will save you time at reassembly

NOTE! Wash all engine parts, except oil seals, O-rings, rubber seals, etc. in cleaning solvent and dry them with compressed air

NOTE! Use a torque wrench to tighten parts when specified tightening torques are required.

NOTE! Use only good quality lubricating oils and greases. Be sure to apply a coat of oil, grease, or sealant before reassembly, to parts as specified.

NOTE! Replace all gaskets and packing. Apply appropriate amount of adhesive or liquid gasket when required.

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General information

Oil Seals

When installing oil seals, carefully observe the following points.

Driving oil seals into housings

Check the seal lip for damage, and be sure to position correctly in the housing.

Apply a smear of grease to the surface of the oil seal (to be fitted into the housing bore).

Use an oil seal driver shown to guide the seal lip and drive the outer diameter squarely. To avoid damage to the oil seal and leaking, never hammer on it directly.

Driving oil seals onto shafts

Apply a smear of grease to the oil seal lip.

Use an oil seal guide of the type shown when driving the oil seal over the stepped portion, splines, threads, or key way to prevent damage to the oil seal lip.

O-rings

Use an O-ring guide to install an O-ring over stepped parts, splines, threads, or key way to prevent damage to the ring. Apply a smear of grease to the O-ring before installation.

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General information

Bearings

When installing a rolling bearing, be sure to push the inner or outer race by which the bearing is fitted. Be sure to use a bearing driver like the one shown.

Whenever possible, use a press to minimize shock to the bearing and to assure proper installation.

Lock Plates

Bend lock plates against the flats of the nuts or bolt heads as shown.

Split Pins and Spring Pins

Generally, split pins are to be replaced once disturbed. Insert the pin fully and spread it properly.

Drive each spring pin into position to hold it in place after later installation of parts has been completed.

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General information

Presentation D49 MS

D49A MS

1. Fuel filters

2. Oil cooler

3. Fuel injection pump

4. Governor oil filter

5. Manual stop lever

6. Governor

7. Stop solenoid

8. Oil dipstick

9. Fuel feed pump

10. Oil filler cap

11. Fresh water pump

12. Lifting eye

13. Intake air silencer

14. Turbocharger

15. Alternator

16. Oil filters

17. Engine oil drain pipe

18. Starter motor

19. Manual speed control knob

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Presentation D49 MT

General information

D49A MT

1. Fuel filters

2. Oil cooler

3. Fuel injection pump

4. Governor oil filter

5. Manual stop lever

6. Governor

7. Stop solenoid

8. Oil dipstick

9. Fuel feed pump

10. Oil filler cap

11. Fresh water pump

12. Lifting eye

13. Intake air silencer

14. Turbocharger

15. Heat exchanger

16. Oil filters

17. Starter motor

18. Engine oil drain pipe

19. Sea water pump

20. Alternator

21. Manual speed control knob

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General information

Identification numbers D49A

Type plates with identification numbers can be found on the engine and the transmission or generator. This information must always be used as a reference when ordering service and spare parts.

Engine ........................................................................................................................................

Product designation ....................................................................................................................

Serial and basic engine number .................................................................................................

Product number ..........................................................................................................................

Certification, IMO ........................................................................................................................

Decal, part No. ...........................................................................................................................

Approval No. ...............................................................................................................................

Transmission / Generator ...........................................................................................................

Product designation ....................................................................................................................

Serial number .............................................................................................................................

Product number ..........................................................................................................................

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General information

Specification D49A MS & MT

General specification

Model ...........................................................................

Water-cooled,4-stroke, turbocharged diesel with air-cooled intercooler

No. of cylinders ............................................................

Arrangement ................................................................

vertical V type

Combustion type ..........................................................

Direct injection

Valve mechanism ........................................................

Overhead

Cylinder bore,mm [in.] ..................................................

170[6.70]

Cylinder stroke,mm [in.] ...............................................

180 [7.10]

Displacement, litres [U.S. gal] .....................................

49.03 [12.95]

Compression ratio ........................................................

14.0:1

Firing order ...................................................................

1-12-5-8-3-10-6-7-2-11-4-9

Rotational direction ......................................................

Counterclockwise as viewed from flywheel

Weight (Dry)(without marine gear), kg [lb] ...................

MS: 4820[10626] MT: 5000 [11025]

Engine main parts

Cylinder liner type ........................................................

Wet type

Piston rings:

Compression rings, pcs ...............................................

Oil ring(w/expander), pcs .............................................

Valve timing (when warm):

Inlet valve .....................................................................

open BTDC 37°

Inlet valve .....................................................................

close ABDC 44°

Exhaust valve ..............................................................

open BBDC 57°

Exhaust valve ..............................................................

close ATDC 24°

Engine support method ................................................

4 point support

Fuel system

Fuel

JIS K2204 ....................................................................

TYPE 1, TYPE 2, TYPE 3

ASTM. D975 ................................................................

No.1-D, No.2-D

BS2869 ........................................................................

CLASS-A1, CLASS-A2,

DIN51601 .....................................................................

DIESEL-FUEL

ISO8217 .......................................................................

DMX-CLASS

Injection pump

Model ...........................................................................

PS6 type

Manufacturer ................................................................

Mitsubishi Heavy Industries, Ltd.

Plunger outside diam., mm [in.] ...................................

17 [0.67]

Plunger lead, mm [in.] ..................................................

Counterclockwise, left-hand 35 [1.38] lead

Cam lift, mm [in.] ..........................................................

15 [0.59]

Fuel feed pump

Model ...........................................................................

Zexel

Manufacturer ................................................................

Zexel

Cam lift, mm [in.] ..........................................................

12 [0.47]

Governor

Control system .............................................................

Woodward Hydraulic PSG

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General information

Fuel system cont.

Fuel injector

Type .............................................................................

Hole type

Manufacturer ................................................................

Zexel

No. of spray holes ........................................................

Spray hole diameter, mm [in.] ......................................

0.325 [0.013]

Spray angle, deg. .........................................................

160°

Injection press., Mpa(kgf/cm²)[psi] ..............................

34.32 to 34.81 (350 to 355) [4979 to 5050]

Fuel filter

Type .............................................................................

Paper element cartridge changeover, spin-on type

Oil system

Lubricating type ...........................................................

Forced circulation type (pressure feed by oil pump)

Engine oil Standard ......................................................

CF oil (API service classification)

Engine oil volume:

Oil sump,liter [U.S. gal] ................................................

200 [52.8] approx

Complete engine, liter [U.S. gal] ..................................

230 [60.8] approx

Oil pump

Type .............................................................................

Gear pump

Delivery capacity, liter [U.S. gal] ..................................

240 [63.4] (at engine speed 800 rpm)

Relief valve

Type .............................................................................

Piston valve type

Opening press., MPa(kgf/cm³)[psi] ..............................

0.51 +/-0.02 (5.2 +/-0.2) [73.97+/-2.84}

Oil cooler

Type .............................................................................

Water-cooled, multi-plate type (housed in the crankcase)

Full-flow oil filter

Type .............................................................................

Paper element changeover type (spin on)

Oil thermostat

Type .............................................................................

Wax type

Valve opening temp., °C [°F] .......................................

80 to 84 [176 to 183.2]

Cooling system

Cooling type .................................................................

Water-cooled, forced circulation

Coolant capacity (whole engine), liter [U.S. gal] ..........

MS: 125 [33.0] MT: 235 [62.1]

Fresh water pump

Type .............................................................................

Centrifugal

Pump capacity, liter [U.S. gal]/min. ..............................

1600 [423], Total head 0.20 MPa (20 mAq) (at 3292 rpm pump speed)

Thermostat

Type .............................................................................

Wax

Valve opening temp.,°C [°F] ........................................

71+/-2 [159.8 +/- 3.6]

Raw water pump (only on MT)

Type .............................................................................

Rubber rotor

Pump capacity, liter [U.S. gal]/min. ..............................

800 [211], Total head 0.10 MPa (10 mAq)(at 1600 rpm pump speed)

Pump drive belt type ....................................................

V-belt

Outside circumference, mm [in] ...................................

2085 [82] or 2115 [83]

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Inlet and exhaust system

Turbocharger

Type .............................................................................

MS: TD13 or TD15 MT: TD15

No. of units ...................................................................

Electrical system

Voltage-polarity ............................................................

24V each float

Starter

Manufacturer ................................................................

Nikko Electric Industry

Pinion mesh type .........................................................

Pinion shift (Reduction type)

Output ..........................................................................

V (kW) 24 (7.5)

No. of starters ..............................................................

No. of pinion tooth/ring gear tooth ...............................

15 / 182

Alternator

Type .............................................................................

3-Phase alternating generator, Internal IC regulator

Manufacturer ................................................................

Mitsubishi Electric

Output ..........................................................................

V-A 24-35

Rated generated ..........................................................

min-1 5000 (at 27V, 35A)

Regulated voltrage .......................................................

V 28.5 +/- 0.5

Drive belt type ..............................................................

V-belt

Outside circumference, mm [in.] ..................................

1000 [39.4]

General information

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Maintenance Standards

Maintenance Standards Table

General

Maximum rpm

Nominal Value ...........

5 – 10 % higher than rated rpm

Repair limit ................

Lower or 20 % higher than rated rpm

NOTE! Rated rpm stamped on the nameplate. Check governor setting.

Minimum rpm

Nominal value ...........

600 to 650 rpm

Compression pressure MPa (Bar) [psi]

Nominal Value ...........

2.85 (28.5) [263] minimum (at 120 rpm)

Repair limit ................

2.30 (23.0) [185] or lower

NOTE! Oil and water temp. 20 to 30°C [68 to 86°F]

Lube oil pressure MPa (Bar) [psi]

Nominal Value ...........

0.20 – 0.29 (2.0 – 2.9) [28 to 43] at idling

Repair limit ................

0.10 (1.0) [14] or lower

NOTE! Oil temp. 60 to 70°C [140 to 158°F]

Valve timing

(2 mm[0.8 in.] clearance valve side, cold)

Nominal Value:

Inlet valve opens .......

2.5° BTDC ±2° (crank angle)

Inlet valve closes ......

13° ABDC ±2° (crank angle)

Exh. valve opens ......

26° BBDC ±2° (crank angle)

Exh. valve closes ......

10.5° BTDC ±2° (crank angle)

NOTE! Values are only for checking valve timing and are different from the actual ones.

Valve clearance (cold), mm [in.]

Inlet valves:

Standard Clearance ..

0.6 [0.024]

Exhaust valves:

Standard Clearance ..

0.8 [0.031]

Injection timing

Nominal Value ...........

XX° BTDC ±1° (crank angle)

NOTE! XX varies according to specifications. Refer to caution plate on No. 1 rocker cover.

Engine main parts

Valves

Valve stem diameter, mm [in.]

Nominal Value ...........

Ø10 [0.39]

Assembly Standard ...

9.940 to 9.960 [0.39134 to 0.39213]

Service Limit .............

9.910 [0.39016]

NOTE! The same for both inlet and exhaust valves.

Plus d'informations sur : www.dbmoteurs.fr

Maintenance Standards

Valve guide inside diameter, mm [in.]

Nominal Value ...........

Ø10 [0.39]

Assembly Standard ...

10.000 to 10.015 [0.39370 to 0.39429]

Service Limit .............

10.060 [0.39606]

NOTE! The same for both inlet and exhaust valves.

Valve seat angle(A)

Nominal Value ...........

30°

Valve depth(B), mm [in.]

Nominal value ...........

Assembly Standard ...

-2.0 – 0.2 [-0.008 – 0.008]

Repair Limit ...............

1.0 [0.039]

Seat width(C), mm [in.]

Nominal value ...........

2.3 [0.091]

Assembly Standard ...

2.15 to 2.45 [0.0846 to 0.0965]

Repair Limit ...............

2.8 [0.110]

Valve margin(D), mm [in.]

Nominal Value ...........

3.0 [0.12]

Assembly Standard ...

2.8 – 3.2 [0.110 to 0.126]

NOTE! Refacing permissible up to 2.5 [0.098]

Cylinder head bore and valve seat diameter, mm [in.]

Nominal Value ...........

Ø60 [2.36]

Assembly Standard ...

-0.070 – -0.130 [-0.00276 – -0.00512]

NOTE! - (minus) indicates interference

Valve push rods

Deflection, mm [in.]

Assembly Standard ...

0.5 [0.020] maximum

Service Limit .............

0.5 [0.020]

Valve springs

Free length (A), mm [in.]

Assembly standard ...

73 [2.87]

Service limit ..............

71 [2.80]

Perpendicularity (B), mm [in.]

Service limit ..............

2.2 [0.087] (at end)

Length under test force, mm [in.]

Assembly standard ...

66.0 [2.6]

Test force, N (kgf) [lbf]

Assembly standard ...

289–319 (29.45 to 32.55) [65 to 72]

Plus d'informations sur : www.dbmoteurs.fr

Maintenance Standards

Rockers

Rocker bushing inside diameter, mm [in.]

Nominal Value ...........

Ø36 [1.42]

Assembly Standard ...

36.000 to 36.040 [1.41732 to 1.41889]

Service Limit .............

36.090 [1.42086]

Rocker shaft diameter, mm [in.]

Nominal Value ...........

Ø36 [1.42]

Assembly Standard ...

35.966 to 35.991 [1.41598 to 1.41697

Service Limit .............

35.940 [1.41496]Cylinder heads

Flatness of gasket surface, mm [in.]

Assembly Standard ...

0.03 [0.0012] or less

Repair Limit ...............

0.07 [0.0028]

Service Limit .............

0.50 [0.0197]

NOTE! Reface if necessary

Thickness of gasket when tightened, mm [in.]

Nominal Value ...........

1.8 [0.07]

Assembly Standard ...

1.77 to 1.83 [0.0697 to 0.0720]

Cylinder liners

Inside diameter, mm [in.]

Nominal Value ...........

Ø170 [6.69]

Assembly Standard ...

170.000 to 170.040 [6.69290 to 6.69447]

Repair Limit ...............

170.200 [6.70078]

Service Limit .............

170.500 [6.71259]

Roundness, mm [in.]

Assembly Standard ...

0.02 [0.0008] or less

Cylindricity, mm [in.]

Assembly Standard ...

0.02 [0.0008] or less

Squareness of flange lower face to liner center line, mm [in.]

Assembly Standard ...

0.03 [0.0012] or less

Protrusion of cylinder liner at flange, mm [in.]

Assembly Standard ...

0.11 to 0.20 [0.0043 to 0.0089]

Pistons and cylinderheads

Clearance between piston top and cylinder head, mm [in.]

Standard Clearance ..

[1.22 to 1.95) ([0.0480 to 0.0768])

Pistons

Outside diameter, mm [in.]

Nominal Value ...........

Ø170 [6.69]

Assembly Standard ...

169.76 to 169.80 [6.6835 to 6.6850]

Service Limit .............

169.66 [6.6795]

NOTE! Meaure diameter perpendicular to pin at piston skirt.

Plus d'informations sur : www.dbmoteurs.fr

Weight difference between pistons in one engine

Assembly Standard ...

±10 g [±0.35 oz]

Pin bore diameter, mm [in.]

Nominal Value ...........

Ø70 [2.76]

Assembly Standard ...

70.002 to 70.015 [2.75598 to 2.75649]

Service Limit .............

70.040 [2.75747]

Protrusion, mm [in.]

Assembly Standard ...

0.06 to 0.65 [0.0024 to 0.0256]

NOTE! From the cylinder block

Piston rings

Gaps Top ring, mm [in.]

Assembly Standard ...

(0.6 to 0.8) ([0.024 to 0.031])

Service Limit .............

(2.0) ([0.079])

NOTE! If gauge is not available, the general value can be obtained at the cylinder bore.

Gaps Second ring, mm [in.]

Assembly Standard ...

(0.6 to 0.8) ([0.024 to 0.031])

Service Limit .............

(2.0) ([0.079])

NOTE! If gauge is not available, the general value can be obtained at the cylinder bore.

Gaps Oil ring, mm [in.]

Assembly Standard ...

(0.3 to 0.45) ([0.012 to 0.018])

Service Limit .............

(2.0) ([0.079])

NOTE! If gauge is not available, the general value can be obtained at the cylinder bore.

Piston pins

Diameter, mm [in.]

Nominal Value ...........

Ø70 [2.76]

Assembly Standard ...

69.987 to 70.000 [2.75539 to 2.75590]

Service Limit .............

69.970 [2.75472]

Connecting rods

Bushing inside diameter, mm [in.]

Nominal Value ...........

Ø70 [2.76]

Assembly Standard ...

70.020 to 70.040 [2.75669 to 2.75747]

Service Limit .............

70.070 [2.75866]

Bend and twist, mm [in.]

Assembly Standard ...

0.05/100 [0.0020/3.9] or less

End play (rod and crankpin widths), mm [in.]

Nominal Value ...........

60 [2.36] x 2

Assembly Standard ...

(0.4 to 0.9) ([0.016 to 0.035])

Service Limit .............

(1.4) ([0.055])

Weight difference between connecting rods in one engine

Assembly Standard ...

±30 g [±1.06 oz]

Maintenance Standards

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Maintenance Standards

Big end bore diameter, mm [in.]

Nominal Value ...........

Ø131 [5.16]

Assembly Standard ...

131.000 to 131.025 [5.15747 to 5.15845]

Service Limit .............

131.050 [5.15944]

NOTE! To be measured in combination with caps. Roundness less than (0.1 mm [0.004 in.] - service limit)

Connecting rod bearings

Thickness of center, STD, mm [in.]

Nominal Value ...........

3.000 [0.11811]

Assembly Standard ...

2.972 to 2.985 [0.11701 to 0.11752]

Service Limit* ............

2.930 [0.11535]

Thickness of center, –0.25 [–0.0098], mm [in.]

Nominal Value ...........

3.125 [0.12303]

Assembly Standard ...

3.097 to 3.110 [0.12193 to 0.12244]

Service Limit* ............

3.055 [0.12028]

Thickness of center, –0.50 [–0.0197], mm [in.]

Nominal Value ...........

3.250 [0.12795]

Assembly Standard ...

3.222 to 3.235 [0.12685 to 0.12736]

Service Limit* ............

3.180 [0.12520]

Thickness of center, –0.75 [–0.0295], mm [in.]

Nominal Value ...........

3.375 [0.12287]

Assembly Standard ...

3.347 to 3.360 [0.13177 to 0.13228]

Service Limit* ............

3.305 [0.13012]

Thickness of center, –1.00 [–0.0394], mm [in.]

Nominal Value ...........

3.500 [0.13780]

Assembly Standard ...

3.472 to 3.485 [0.13669 to 0.13720]

Service Limit .............

3.430 [0.13504]

*NOTE! Replace bearings if worn down to service limit. Regrind crankpins and use undersize bearings if necessary.

Oil pump drive

Cover bearing journal inside diameter, mm [in.]

Nominal Value ...........

Ø110 [4.33]

Assembly Standard ...

110.000 to 110.035 [4.33070 to 4.33208]

Plate bearing journal inside diameter, mm [in.]

Nominal Value ...........

Ø110 [4.33]

Assembly Standard ...

109.987 to 110.022 [4.33019 to 4.33157]

Bearing, Outside diameter, mm [in.]

Nominal Value ...........

Ø110 [4.33]

Assembly Standard ...

109.985 to 110.000 [4.33012 to 4.33071]

Bearing, Inside diameter, mm [in.]

Nominal Value ...........

Ø50 [1.97]

Assembly Standard ...

49.988 to 50.000 [1.96803 to 1.96850]

Gear shaft bearing journal diameter, mm [in.]

Nominal Value ...........

Ø50 [1.97]

Assembly Standard ...

49.993 to 50.013 [1.96822 to 1.96901]

Plus d'informations sur : www.dbmoteurs.fr

Maintenance Standards

Flywheel

Face runout, mm [in.]

Assembly Standard ...

0.336 [0.0132] to less

Radial runout, mm [in.]

Assembly Standard ...

0.13 [0.0051] or less

Injection pump accessory drive

Bearing bore inside diameter, mm [in.]

Nominal Value ...........

Ø90 [3.54]

Assembly Standard ...

89.987 – 90.022 [3.54279 – 3.54417]

Bearing bore inside diameter, mm [in.]

Nominal Value ...........

Ø100 [3.94]

Assembly Standard ...

99.987– 100.022 [3.93649 – 3.93787]

Bearing, Outside diameter, mm [in.]

Nominal Value ...........

Ø90 [3.54]

Assembly Standard ...

89.985 – 90.000 [3.54272 – 3.54331]

Bearing, Outside diameter, mm [in.]

Nominal Value ...........

Ø100 [3.94]

Assembly Standard ...

99.985 – 100.000 [3.93642 – 3.93701]

Bearing, Inside diameter, mm [in.]

Nominal Value ...........

Ø45 [1.77]

Assembly Standard ...

44.988 to 45.000 [1.77118 to 1.77165]

Bearing, Inside diameter , mm [in.]

Nominal Value ...........

Ø50 [1.97]

Assembly Standard ...

49.988 to 50.000 [1.96803 to 1.96850]

Drive shaft bearing journal diameter, mm [in.]

Nominal Value ...........

Ø45 [1.77]

Assembly Standard ...

45.002 to 45.013 [1.77173 to 1.77216]

Drive shaft bearing journal diameter, mm [in.]

Nominal Value ...........

Ø50 [1.97]

Assembly Standard ...

50.002 to 50.013 [1.96858 to 1.96901]

Damper

Radial runout (at periphery), mm [in.]

Assembly Standard ...

0.5 [0.020] or less

Service Limit .............

1.5 [0.059]

Radial runout (at periphery), mm [in.]

Assembly Standard ...

0.5 [0.020] or less

Service Limit .............

1.5 [0.059]

Plus d'informations sur : www.dbmoteurs.fr

Maintenance Standards

Front gears

Backlash, mm [in.]

Assembly Standard ...

(0.12 to 0.18) ([0.0047 to 0.0071])

Repair Limit ...............

(0.30) ([0.0118])

Service Limit .............

(0.50) ([0.0197])

NOTE! Replace gears, if necessary

Idle gear shaft bushing inside diameter, mm [in.]

Nominal Value ...........

Ø50 [1.97]

Assembly Standard ...

50.000 to 50.025 [1.96850 to 1.96948]

Service Limit .............

50.060 [1.97086]

Idle gear shaft diameter, mm [in.]

Nominal Value ...........

Ø50 [1.97]

Assembly Standard ...

49.950 to 49.975 [1.966553 to 1.96752]

Service Limit .............

49.900 [1.96456]

Idle gear end play, mm [in.]

Assembly Standard ...

(0.2 to 0.4) ([0.008 to 0.016])

Service Limit .............

(0.6) ([0.024])

Timing gears

Backlash, mm [in.]

Assembly Standard ...

(0.12 to 0.18) ([0.0047 to 0.0071])

Repair Limit ...............

(0.30) ([0.0118])

Service Limit .............

(0.50) ([0.0197])

Idle gear shaft bushing inside diameter, mm [in.]

Nominal Value ...........

Ø65 [2.56]

Assembly Standard ...

65.000 to 65.030 [2.55906 to 2.56024]

Service Limit .............

65.060 [2.56142]

Idle gear shaft diameter, mm [in.]

Nominal Value ...........

Ø65 [2.56]

Assembly Standard ...

64.951 to 64.970 [2.55713 to 2.55787]

Service Limit .............

64.900 [2.55512]

Idle gear end play, mm [in.]

Assembly Standard ...

(0.3 to 0.6) ([0.118 to 0.236])

Service Limit .............

(1.0) ([0.0397])

Plus d'informations sur : www.dbmoteurs.fr

Camshaft

Cam lift (A-B), mm [in.]

Nominal Value ...........

9.247 [0.36405]

Assembly Standard ...

9.197 to 9.297 [0.36209 to 0.36602]

Service Limit .............

8.45 [0.3327]

Deflection, mm [in.]

Assembly Standard ...

0.05 [0.0020] or less

Repair Limit ...............

0.08 [0.0031]

NOTE! Deflection at center bushing measured with both ends supported. Repair or replace, if necessary.

Journal diameter, mm [in.]

Nominal Value ...........

Ø84 [3.31]

Assembly Standard ...

83.92 to 83.94 [3.3039 to 3.3047]

Service Limit .............

83.87 [3.3020]

Camshaft bushing inside diameter (as installed in crank case), mm [in.]

Nominal Value ...........

Ø84 [3.31]

Assembly Standard ...

84.00 to 84.035 [3.30708 to 3.30846]

Service Limit .............

84.10 [3.3110]

NOTE! Replace bushings and ream them, if necessary

End play, mm [in.]

Nominal Value ...........

8 [0.3]

Assembly Standard ...

0.10 to 0.25 [0.0039 to 0.0098]

Service Limit .............

0.40 [0.0157])

NOTE! Replace thrust bearing, if necessary.

Crankshaft

Crankpin diameter, mm [in.]

Nominal Value ...........

Ø125 [4.92]

Assembly Standard ...

-0.050 – -0.070 [0.00197 – -0.00276]

Repair Limit ...............

-0.110 [-0.00433]

Crankpin journal diameter, mm [in.]

Nominal Value ...........

Ø170 [6.69]

Assembly Standard ...

-0.060 – -0.080 [0.00236 – -0.00315]

Repair Limit ...............

-0.110 [-0.00433]

Journal and crankpin center to center distance, mm [in.]

Nominal Value ...........

90 [3.54]

Assembly Standard ...

±0.1 [±0.004]

Parallelism between journals and crankpins, mm [in.]

Assembly Standard ...

0.01 [0.0004] or less at pin length

Repair Limit ...............

0.03 [0.0012]

Roundness of journals and crankpins, mm [in.]

Assembly Standard ...

0.01 [0.0004] or less in diameters

Repair Limit ...............

0.03 [0.0012]

Cylindricity of journals and crankpins, mm [in.]

Assembly Standard ...

0.02 [0.0008] or less in diameters

Repair Limit ...............

0.03 [0.0012]

Maintenance Standards

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Maintenance Standards

Fillet radius of crankpins, mm [in.]

Nominal Value ...........

7 [0.28]

Assembly Standard ...

7.0 – 7.2

[0.268 – 0.276]

Fillet radius of journals, mm [in.]

Nominal Value ...........

8.5 [0.33]

Assembly Standard ...

8.3 – 8.5

[0.327 – 0.335]

Hardness of journals and crankpins

Assembly Standard ...

Hv>590

Angularity

Assembly Standard ...

±0°20’

Deflection, mm [in.]

Assembly Standard ...

0.04 [0.0016] or less

Repair Limit ...............

0.10 [0.0039]

NOTE! Repair or replace if necessary

Crankshaft end play, mm [in.]

Nominal Value ...........

67 [2.64]

Assembly Standard ...

0.20 to 0.40 [0.0079 to 0.0157]

Service Limit .............

0.50 [0.0197]

+ 1.18[0.0465] (crank shaft width)

NOTE! Replace thrust bearings if worn down to service limit. Use oversize thrust bearings if worn beyond repair limit.

Main bearing

Thickness of center, STD, mm [in.]

Nominal Value ...........

4.500 [0.17717]

Assembly Standard ...

4.467 to 4.480 [0.17587 to 0.17638]

Service Limit .............

4.425 [0.17421]

NOTE! Replace bearings if worn down to service limit. Regrind crankpins and use undersize bearings if worn beyond service limit.

Thickness of center, –0.25 [–0.0098], mm [in.]

Nominal Value ...........

4.625 [0.18209]

Assembly Standard ...

4.592 to 4.605 [0.18079 to 0.18130]

Service Limit .............

4.550 [0.17913]

NOTE! Replace bearings if worn down to service limit. Regrind crankpins and use undersize bearings if worn beyond service limit.

Thickness of center, –0.50 [–0.0197], mm [in.]

Nominal Value ...........

4.750 [0.18701]

Assembly Standard ...

4.717 to 4.730 [0.18571 to 0.18622]

Service Limit .............

4.675 [0.18405]

NOTE! Replace bearings if worn down to service limit. Regrind crankpins and use undersize bearings if worn beyond service limit.

Thickness of center, –0.75 [–0.0295], mm [in.]

Nominal Value ...........

4.875 [0.19193]

Assembly Standard ...

4.842 to 4.855 [0.19063 to 0.19114]

Service Limit .............

4.800 [0.18898]

NOTE! Replace bearings if worn down to service limit. Regrind crankpins and use undersize bearings if worn beyond service limit.

Thickness of center, –1.00 [–0.0394], mm [in.]

Nominal Value ...........

5.000 [0.19685]

Assembly Standard ...

4.967 to 4.980 [0.19555 to 0.19606]

Service Limit .............

4.925 [0.19390]

NOTE! Replace bearings if worn down to service limit. Regrind crankpins and use undersize bearings if worn beyond service limit.

Plus d'informations sur : www.dbmoteurs.fr

Maintenance Standards

Crankcase

Flatness of gasket surface, mm [in.]

Assembly Standard ...

0.1 [0.004] or less

Repair Limit ...............

0.2 [0.008]

NOTE! Reface if necessary

Main bearing bore diameter, mm [in.]

Nominal Value ...........

Ø179 [7.05]

Assembly Standard ...

179.000 to 179.025 [7.04723 to 7.04821]

Service Limit .............

179.045 [7.04900]

Inlet and exhaust system

Turbocharger TD13 (only on D49 MS)

Inside diameter of bearing-fitted housing section, mm [in.]

Nominal Value ...........

30 [1.18]

Service Limit .............

30.006 [1.18134]

Bearing outside diameter, mm [in.]

Service Limit .............

29.876 [1.17622]

Bearing inside diameter, mm [in.]

Service Limit .............

18.050 [0.71063]

Bearing length, mm [in.]

Service Limit .............

17.440 [0.68661]

Shaft journal diameter, mm [in.]

Nominal Value ...........

18 [0.709]

Service Limit .............

17.996 [0.70850]

Shaft deflection, mm [in.]

Service Limit .............

0.015 [0.00059]

Ring gap clearance, mm [in.]

Standard Clearance ..

0.05 to 0.25 [0.00197 to 0.00984]

Shaft & turbine wheel and turbine housing clearance, mm [in.]

Standard Clearance ..

0.29 to 0.91 [0.01142 to 0.03583]

Shaft end play, mm [in.]

Assembly Standard ...

0.075 to 0.135 [0.00295 to 0.00531]

Turbine backplate and turbine wheel clearance, mm [in.]

Standard Clearance ..

0.55 to 1.15 [0.02165 to 0.05315]

Turbocharger TD15

Inside diameter of bearing-fitted housing section, mm [in.]

Nominal Value ...........

Ø34 [1.34]

Service Limit .............

34.016 [1.33921]

Plus d'informations sur : www.dbmoteurs.fr

Maintenance Standards

Bearing outside diameter, mm [in.]

Service Limit .............

33.882 [1.33393]

Bearing inside diameter, mm [in.]

Service Limit .............

19.929 [0.78460]

Bearing length, mm [in.]

Service Limit .............

19.440 [0.76535]

Shaft journal, mm [in.]

Nominal Value ...........

Ø20 [0.79]

Service Limit .............

19.863 [0.78201]

Shaft deflection, mm [in.]

Service Limit .............

0.015 [0.00059]

Ring gap clearance, mm [in.]

Standard Clearance ..

0.05 to 0.20 [0.00197 to 0.00787]

Shaft & turbine wheel and turbine housing clearance, mm [in.]

Standard Clearance ..

0.63 to 1.18 [0.02480 to 0.04646]

Shaft end play, mm [in.]

Assembly Standard ...

0.075 to 0.135 [0.00295 to 0.00531]

Turbine backplate and turbine wheel clearance, mm [in.]

Standard Clearance ..

0.85 to 1.35 [0.03346 to 0.04528]

Lubrication system

Oil Pump

Backlash between drive gear and driven gear, mm [in.]

Assembly Standard ...

(0.10 to 0.20) [0.0039 to 0.0079]

Service Limit .............

(0.4) [0.0157]

Drive gear and driven gear clearance, mm [in.]

Nominal Value ...........

Ø60 [2.36]

Standard Clearance ..

(0.100 to 0.148) [0.00394 to 0.00583]

Clearance ..................

Tip clearance (0.35) [0.0138]

Gear and clearance in case, mm [in.]

Nominal Value ...........

72.5 [2.854]

Standard Clearance ..

(0.040 to 0.116) [0.00157 to 0.00457]

Clearance ..................

[0.21] [0.0083]

NOTE! Remove the cover packing (width of 0.04 [0.0016]) for mesurement.

Shaft diameter, Drive shaft, mm [in.]

Nominal Value ...........

Ø30 [1.18]

Assembly Standard ...

29.887 to 29.000 [1.17665 to1.17717]

Service Limit .............

29.840 [1.17480]

Plus d'informations sur : www.dbmoteurs.fr

Maintenance Standards

Shaft diameter, Driven shaft, mm [in.]

Nominal Value ...........

Ø30 [1.18]

Assembly Standard ...

29.947 to 29.960 [1.17901 to 1.17953]

Service Limit .............

29.900 [1.17716]

Bushing inside diameter, mm [in.]

Nominal Value ...........

Ø30 [1.18]

Assembly Standard ...

30.000 to 30.021 (1.18110 to 1.18193)

Service Limit .............

30.055 [1.18327]

Safety valve

Valve opening pressure MPa (Bar) [psi]

Assembly Standard ...

1.27±0.13 (12.7±1.3) [185±18.5]

Spring set length/load mm [in.]/N (kgf) [lbf]

Assembly Standard ...

65.8 [2.59]/359 (36.6) [80.7]

Service Limit .............

65.8 [2.59]/314 (32) [70.5]

Relief valve

Valve opening pressure, MPa (Bar) [psi]

Assembly Standard ...

0.5±0.02 (5±0.2) [71.1±2.84]

Oil thermostat

Temperature at which valve starts opening

Assembly Standard ...

80 to 84°C [176 to 183°F]

Temperature at which valve lift more than 11 mm [0.43 in.]

Assembly Standard ...

95°C [203°F]

Piston cooling nozzle

Valve opening pressure, MPa (Bar) [psi]

Assembly Standard ...

0.26 to 0.32 2.6 to 3.2 [38 to 47]

Cooling system

Fresh water pump

Bearing bore inside diameter, mm [in.]

Nominal value ...........

Ø120 [4.72]

Assembly Standard ...

119.987 to 120.022 [4.72389 to 4.72527]

Bearing bore inside diameter, mm [in.]

Nominal value ...........

Ø110 [4.33]

Assembly Standard ...

110.005 to 110.040 [4.33090 to 4.33227]

NOTE! Same as the bearing cover.

Bearing, Outside diameter, mm [in.]

Nominal value ...........

Ø120 [4.72]

Assembly Standard ...

119.985 to 120.000 [4.72381 to 4.72441]

Plus d'informations sur : www.dbmoteurs.fr

Maintenance Standards

Bearing, Outside diameter, mm [in.]

Nominal value ...........

Ø110 [4.33]

Assembly Standard ...

109.985 to 110.000 [4.33012 to 4.33071]

Bearing, Inside diameter, mm [in.]

Nominal value ...........

Ø55 [2.17]

Assembly Standard ...

54.985 to 55.000 [2.16476 to 2.16535]

Bearing, Inside diameter, mm [in.]

Nominal value ...........

Ø50 [1.97]

Assembly Standard ...

49.988 to 50.000 [1.96803 to 1.96850]

Shaft bearing journal diameter, mm [in.]

Nominal value ...........

Ø55 [2.17]

Assembly Standard ...

55.011 to 55.024 [2.16578 to 2.16629]

Shaft bearing journal diameter, mm [in.]

Nominal value ...........

Ø50 [1.97]

Assembly Standard ...

50.011 to 50.024 [1.96893 to 1.96944]

Vane front face clearance, mm [in.]

Nominal value ...........

1.04 [0.041]

Standard Clearance ..

(0.58 to 1.5) ([0.023 to 0.059])

Thermostat

Temperature at which valve starts opening

Assembly Standard ...

71±2°C [159.8±3.6°F]

NOTE! Check in atmospheric pressure

Temperature at which valve lift is more than 11 mm [0.43 in.]

Assembly Standard ...

85°C [185°F]

NOTE! Check in atmospheric pressure

Sea water pump

Impeller

Repair Limit ...............

Replace if cracked.

Pump seals

Repair Limit ...............

Replace if water leaks.

Bearing

Repair Limit ...............

Replace if worn excessively.

Holder bearing bore inside diameter, mm [in.]

Nominal value ...........

Ø110 [4.33]

Assembly Standard ...

109.995 to 110.030 [4.33050 to 4.33188]

Service Limit .............

110.030 [4.33188]

Plus d'informations sur : www.dbmoteurs.fr

Maintenance Standards

Bearing, Outside diameter, mm [in.]

Nominal value ...........

Ø110 [4.33]

Assembly Standard ...

109.985 to 110.000 [4.33011 to 4.3307]

Bearing, Inside diameter, mm [in.]

Nominal value ...........

Ø50 [1.97]

Assembly Standard ...

49.985 to 50.000 [1.96791 to 1.9685]

Shaft bearing journal, mm [in.]

Nominal value ...........

Ø50 [1.97]

Assembly Standard ...

50.002 to 50.013 [1.96858 to 1.96901]

Service Limit .............

50.000 [1.96858]

Fuel system

Fuel injector

Valve opening pressure, MPa (kgf/cm 2 ) [psi]

Nominal value ...........

34.32 (350) [4977]

Assembly Standard ...

34.32 to 34.81 350 to 355 [4977 to 5048]

Spray cone angle

Nominal value ...........

160°

NOTE! Check nozzle with a hand tester (at fuel oil temperature 20°C [68°F]. Replace the nozzle if the spray pattern is still bad after washing in clean fuel oil.

Injection pump

Overall clearance at tappet roller, mm [in.]

Service Limit .............

0.2 [0.00787]

Wear of contact surface between tappet and plunger, mm [in.]

Service Limit .............

0.2 [0.00787]

Outside diameter at contact surface of camshaft oil seal, mm [in.]

Nominal value ...........

Ø35 [1.378]

Assembly Standard ...

34.963 to 34.938 [1.37649 to 1.37551]

Service Limit .............

34.800 [1.37001]

Camshaft deflection, mm [in.]

Assembly Standard ...

0.05 [0.00197]

Repair Limit ...............

0.15 [0.00591]

Plus d'informations sur : www.dbmoteurs.fr

Maintenance Standards

Plunger Spring, mm [in.]

Free length (A), mm[in.]

Assembly Standard ...

70.8 [2.787]

Perpendicularity (B), mm[in.]

Service Limit .............

1.8 [0.071]

Length under test force, mm [in.]

Assembly standard ...

60.0 [2.36]

Test force, N (kgf) [lbf]

Assembly standard ...

299–366 (30.5–37.3) [67.2–82.2]

Delivery valve spring, mm [in.]

Free length (A)

Assembly Standard ...

18 [0.71]

Perpendicularity (B)

Service Limit .............

0.6 [0.024]

Length under test force, mm [in.]

Assembly standard ...

14.15 [0.56]

Test force, N (kgf) [lbf]

Assembly standard ...

51.6-61.4 (5.26–6.26) [11.60–13.80]

Camshaft thrust clearance, mm [in.]

Standard Clearance ..

0.02 to 0.06 [0.00079 to 0.00236]

Resistance in rack movement

Assembly Standard ...

500 g [1.102 lb]

NOTE! Make sure rack moves smoothly. Total rack stroke should be 36 mm [1.42 in.].

Injection start interval

Assembly Standard ...

60°±0.5°

NOTE! Camshaft angle

Nozzle valve opening pressure MPa (Bar) [psi]

Assembly Standard ...

34.3 (343) [4978.75]

Feed pressure MPa (Bar) [psi]

Assembly Standard ...

0.16 (1.6) [22.76]

Feed pump

Feed pump discharge start time

Assembly Standard ...

20 sec or less

Priming pump discharge start

Assembly Standard ...

No. of pumping operations: 30 strokes or less

Feed pump feed rate (pump at 600 rpm)

Assembly Standard ...

900 cm

[54.9 cu.in.]/15 sec

Plus d'informations sur : www.dbmoteurs.fr

Maintenance Standards

PSG governor drive

Diameter of case bore, drive shaft-side bearing section, mm [in.]

Nominal Value ...........

52 [2.05]

Assembly Standard ...

51.988–52.018 [2.04677–2.04795]

Drive shaft side bearing

Outside diameter, mm [in.]

Nominal Value ...........

52 [2.05]

Assembly Standard ...

51.987–52.000 [2.04673–2.04742]

Inside diameter, mm [in.]

Nominal Value ...........

25 [0.98]

Assembly Standard ...

24.990–25.000 [0.98386–0.98425]

Drive shaft diam., bearing section, mm [in.]

Nominal Value ...........

25 [0.98]

Assembly Standard ...

25.002–25.011 [0.98433–0.98468]

Case bore diam., idler shaft-side bearing section, mm [in.]

Nominal Value ...........

47 [1.85]

Assembly Standard ...

46.989–47.014 [1.84996 –1.85094]

Idler shaft side bearing diameter

Outside diameter, mm [in.]

Nominal Value ...........

47 [1.85]

Assembly Standard ...

46.988–47.000 [1.84992–1.85039]

Inside diameter, mm [in.]

Nominal Value ...........

20 [0.79]

Assembly Standard ...

19.990–20.000 [0.78701–0.78740]

Idler shaft diam., bearing section, mm [in.]

Nominal Value ...........

20 [0.79]

Assembly Standard ...

20.002–20.011 [0.78749–0.78783]

Electric system

Starter

Diameter of commutator, mm [in.]

Nominal Value ...........

Ø43 [1.69]

Service Limit .............

Ø42 [1.65]

Runout of commutator, mm [in.]

Assembly Standard ...

0.06 [0.0024], or less

Service Limit .............

0.10 [0.0039]

Mica depth in commutator, mm [in.]

Assembly Standard ...

0.7–0.9 [0.028–0.035]

Service Limit .............

0.2 [0.0079]

Height of brushes, mm [in.]

Assembly Standard ...

21–22 [0.83–0.87]

Service Limit .............

13 [0.51]

Plus d'informations sur : www.dbmoteurs.fr

Maintenance Standards

Tension of brush springs, N (kgf) [lbf]

Nominal Value ...........

44.13 [4.5] [10]

Assembly Standard ...

39.23–49.03 (4.0–5.0) [9–11]

Service Limit .............

39.23 (4.0) [9], maximum

Armature shaft diameter (rear), mm [in.]

Nominal Value ...........

Ø14 [0.55]

Assembly Standard ...

13.941–13.968 [0.54886–0.54992]

Repair Limit ...............

Ø10 +0.25

+0.15

[0.39

+0.0098

+0.0059

]

Armature shaft diameter (front), mm [in.]

Nominal Value ...........

Ø25 [0.98]

Assembly Standard ...

25.002–25.011 [0.98433–0.98468]

Reapir Limit ...............

Ø25 +0.25

+0.15

[0.98

+0.0098

+0.0059

]

Armature shaft deflection, mm [in.]

Assembly Standard ...

0.06 [0.00236]

Pinion shaft diameter (rear), mm [in.]

Nominal Value ...........

Ø30 [1.8]

Assembly Standard ...

30.002 to 30.011 [1.18118 to 1.1853]

Reapir Limit ...............

Ø30 +0.011

+0.002

[1.18

+0.0043

+0.0008

]

Pinion shaft diameter (front), mm [in.]

Nominal Value ...........

Ø19 [0.75]

Assembly Standard ...

(18.90 to 18.94) ([0.7441 to 0.7457])

Reapir Limit ...............

Ø19 +0.06

+0.10

[0.75

+0.00236

+0.00394

]

Metal, Pinion

Nominal Value ...........

Ø19 [0.75]

Assembly Standard ...

19.000 to 19.033 [0.7480 to 0.7493]

Reapir Limit ...............

Ø19

+0.033

[0.75

+0.00130

]

Service Limit .............

0.25 [0.0098]

NOTE! Clearance between shaft and metal.

End play of armature, mm [in.]

Assembly Standard ...

0.3 to 0.7 [0.012 to 0.028]

End play of pinion shaft, mm [in.]

Assembly Standard ...

0.2 to 0.8 [0.008 to 0.031]

Alternator

Output current (27 V), 2500 rpm

At 2500 rpm:

Assembly Standard ...

30 A or higher when cold

At 5000 rpm:

Assembly Standard ...

35 A or higher, when hot

Regulator adjusting voltage (alternator at 5000 rpm, load at 5 A or lower)

Assembly Standard ...

28.5±0.5 V

Field coil resistance (at 20°C [68°F])

Assembly Standard ...

7.3 to 8.6 W

Plus d'informations sur : www.dbmoteurs.fr

General information

Tightening torques D49A MS

Description

Cylinder Head

Cylinder head nozzle gland (studs)

Rocker case

Rocker shaft

Rocker arm lock nuts

Bridge lock nuts

Camshaft gear

Camshaft thrust plate

Main bearing caps

Main bearing cap side bolts

Hanger

Piston cooling nozzle

Timing gear case

Rear plate

Oil pan

Front mounting bracket

Rear mounting bracket

Connecting rod metal caps

Flywheel

Balance weight

Viscous damper

Ring gears

Rear idler shaft

Rear idler shaft (nuts)

Front gear case

Front plate

Front idler shaft

Front idler gear thrust plate

Exhaust manifold V-clamp nuts

Exhaust manifold mounting bolts

12 x 1,25

16 x 1,5

12 x 1,75

16 x 1,5

12 x 1,25

16 x 1,5

12 x 1,25

20 x 1,5

22 x 1,5

10 x 1,25

20 x 1,25

18 x 1,5

Thread

Diam.xPitch

(M-Thread)

22 x 2,5

14 x 2,0

12 x 1,25

14 x 2,0

12 x 1,25

10 x 1,25

12 x 1,25

22 x 2,5

20 x 2,5

12 x 1,25

16 x 1,5

12 x 1,25

10 x 1,25

6 x 1,0

10 x 1,5

Fresh water pump

Fresh water pump shaft pulley (nuts)

12 x 1,25

30 x 1,5

392

539

490

392

196

392

216

255

108

216

392

216

108

539

69-78

108

147

108

588

392

108

392

Torque kpm

3,5

0,9

5,6

7-8

6,5

lbf.ft

Notes

159

6,5

398 (a) (b) (c)

51-58

108

434 (a)

289

159

25 (d)

188

159

289

398 (a) (e)

398 (a)

362

289

145

289 For alternator drive.

(a) Wet , apply lubrication oil to the threads of the nut and bolt.

(b) 2-step tightening method

(c) Tighten cylinder head bolts according to the angle method, tighten to 294 Nm [30 kpm; 217 lbf.ft], then tighten 60° more.

(d) Extremely important to use torque wrench in tightening the piston cooling nozzles. Failure to do so may result in excessive tightening

torque, which may cause valve malfunctions that could lead to seizing of pistons due to insufficient lubrication.

(e) Tighten connecting rod caps according to the angle method, tighten to 245 Nm [25 kpm; 181 lbf.ft], then tighten 60° more.

Plus d'informations sur : www.dbmoteurs.fr

General information

Tightening torques D49A MS

Description

Oil pump

Oil pump cover

Oil & Water pump mounting plates

Bearing cover (oil & water pump)

Thread

Diam.xPitch

(M-Thread)

12 x 1,25 108

10 x 1,25 26,3-39,7

12 x 1,25

108

Injection pump

Injection pump bracket

Injection pump drive case

Injection pump gear (nuts)

Injection pump laminate plate

Injection pump flywheel (nuts)

Injection pump coupling shaft

Injection pump plunger assembly

Injection pump delivery valve holder

Injection nozzle gland (nut)

Injection nozzle chip (nut)

Nozzle holder cap nuts

Injection nozzle set screw

Injection nozzle inlet connector

Injection pipes

12 x 1,25

30 x 1,5

12 x 1,25

24 x 1,5

14 x 1,5

12 x 1,25

30 x 1,5

14 x 1,5

28 x 1,5

14 x 1,5

10 x 1,5

16 x 1,5

18 x 1,5

Torque kpm

2,7-4,1

108

392 40

103-113 10,5-11,5

392

167-177

78-83

235-255

177-196

69-78

34-44

64-74

49-69

17-18

8-8,5

24-26

18-20

7-8

3,5-4,5

6,5-7,5

5-7

lbf.ft

Notes

18-32

289

76-83

289

123-130 Tighten the slit part.

58-61

174-188

130-145

51-58

25-33

47-54

36-51

Fuel filter air vent plug

Fuel rack control lever

Governor drivecase

Starter

Turbocharger compressor wheel (nut)

Turbocharger V-clamp

Turbocharger compressor wheel (nut)

Turbocharger turbine housing

Turbocharger V-clamp

–

8 x 1,25

12 x 1,25

11 x 1,0

–

1/2 x 20

10 x 1,5

–

7,8-9,8

108

–

7,8-9,8

–

25-28

9,8-10,8

0,8-1,0

2,5

–

0,8-1,0

–

2,6-2,9

1,0-1,1

5,8-7,2

18 (b)

– TD13(f)(g)(h)

5,8-7,2 TD13 (g)

– TD15UNF(f)(i)

19-21 TD15 (g)

7,2-8,0 TD15 (g)

(a) Wet , apply lubrication oil to the threads of the nut and bolt.

(b) 2-step tightening method,

(c) Tighten cylinder head bolts according to the angle method, tighten to 294 Nm [30 kpm; 217 lbf.ft], then tighten 60° more.

(d) Extremely important to use torque wrench in tightening the piston cooling nozzles. Failure to do so may result in excessive

tightening torque, which may cause valve malfunctions that could lead to seizing of pistons due to insufficient lubrication.

(e) Tighten connecting rod caps according to the angle method, tighten to 245 Nm [25 kpm; 181 lbf.ft], then tighten 60° more.

(f) Left-handed thread.

(g) Apply Moly Disulfide to thread.

(h) Tighten the lock nut to 49 Nm [5 kpm; 36 lbf.ft] firs, then loosen it completely. Retighten to 14,7 Nm [1,5 kpm; 0,8 lbf.ft],

then tighten 80±3° more.

(i) Tighten the lock nut to 69 Nm [7 kpm; 51 lbf.ft] then loosen it completely. Apply Loctite No. 962T to the threads.

Retighten to 9,8 Nm [1 kpm; 7,2 lbf.ft], then tighten 90±3° more.

Plus d'informations sur : www.dbmoteurs.fr

General information

Tightening torques D49A MT

Description

Cylinder Head

Cylinder head nozzle gland (studs)

Rocker case

Rocker shaft

Rocker arm lock nuts

Bridge lock nuts

Camshaft gear

Camshaft thrust plate

Main bearing caps

Main bearing cap side bolts

Hanger

Piston cooling nozzle

Timing gear case

Oil pan

Front mounting bracket

Rear mounting bracket

Connecting rod metal caps

Flywheel

Balance weight

Viscous damper

Ring gears

12 x 1,25

16 x 1,5

12 x 1,75

16 x 1,5

12 x 1,25

20 x 1,5

22 x 1,5

10 x 1,25

Thread

Diam.xPitch

(M-Thread)

22 x 2,5

14 x 2,0

12 x 1,25

14 x 2,0

12 x 1,25

10 x 1,25

12 x 1,25

22 x 2,5

20 x 2,5

Rear plate

Rear idler shaft

Rear idler shaft (nuts)

Front gear case

Front plate

Front idler shaft

Front idler gear thrust plate

12 x 1,25

16 x 1,5

20 x 1,25

18 x 1,5

12 x 1,25

16 x 1,5

12 x 1,25

10 x 1,25

Exhaust manifold V-clamp nuts

Exhaust manifold mounting bolts

Water pump

Water pump shaft pulley (nuts)

6 x 1,0

10 x 1,5

12 x 1,25

30 x 1,5

392

216

255

392

539

588

490

539

69-78

108

147

108

588

392

108

216

392

196

216

108

392

Torque kpm

3,5

5,6

7-8

6,5

0,9

lbf.ft

Notes

159

289

145

159

398 (a) (b) (c)

51-58

108

434 (a)

289

159

25 (d)

188

289

398 (a) (e)

434 (a)

362

6,5

289 For alternator drive.

(a) Wet , apply lubrication oil to the threads of the nut and bolt.

(b) 2-step tightening method

(c) Tighten cylinder head bolts according to the angle method, tighten to 294 Nm [30 kpm; 217 lbf.ft], then tighten 60° more.

(d) Extremely important to use torque wrench in tightening the piston cooling nozzles. Failure to do so may result in excessive tightening

torque, which may cause valve malfunctions that could lead to seizing of pistons due to insufficient lubrication.

(e) Tighten connecting rod caps according to the angle method, tighten to 245 Nm [25 kpm; 181 lbf.ft], then tighten 60° more.

Plus d'informations sur : www.dbmoteurs.fr

General information

Tightening torques D49A MT

Description

Oil pump

Oil pump cover

Oil & Water pump mounting plates

Bearing cover (oil & water pump)

Thread

Diam.xPitch

(M-Thread)

12 x 1,25 108

10 x 1,25 26,3-39,7

12 x 1,25

108

Torque kpm

2,7-4,1

lbf.ft

Notes

18-32

Sea water pump cam (screw)

Sea water pump casing

Sea water pump cover

Sea water pump drive gear (nut)

Injection pump

Injection pump bracket

Injection pump drive case

Injection pump gear (nuts)

Injection pump laminate plate

Injection pump flywheel (nuts)

Injection pump coupling shaft

Injection pump plunger assembly

Injection pump delivery valve holder

Injection nozzle gland (nut)

Injection nozzle chip (nut)

Nozzle holder cap nuts

Injection nozzle set screw

Injection nozzle inlet connector

Injection pipes

10 x 1,25 15,7-21,6

8 x 1,25 7,4-9,8

24 x 3,0

12 x 1,25

30 x 1,5

12 x 1,25

24 x 1,5

14 x 1,5

12 x 1,25

30 x 1,5

14 x 1,5

28 x 1,5

14 x 1,5

10 x 1,5

16 x 1,5

18 x 1,5

108

392

167-177

78-83

235-255

177-196

69-78

34-44

64-74

49-69

1,6-2,2

0,75-1,0

191-201 19,5-20,5

392 40

103-113 10,5-11,5

17-18

8-8,5

24-26

18-20

7-8

3,5-4,5

6,5-7,5

5-7

11,6-15,9

5,42-7,23

141-148

289

76-83

289

123-130 Tighten the slit part.

58-61

174-188

130-145

51-58

25-33

47-54

36-51

Fuel filter air vent plug

Fuel rack control lever

Governor drivecase

Starter

–

8 x 1,25

12 x 1,25

7,8-9,8

108

0,8-1,0

2,5

5,8-7,2

18 (b)

Turbocharger compressor wheel (nut)

Turbocharger turbine housing

Turbocharger V-clamp

1/2 x 20

10 x 1,5

–

25-28

9,8-10,8

–

2,6-2,9

1,0-1,1

– TD15UNF(f)(i)

19-21 TD15 (g)

7,2-8,0 TD15 (g)

(a) Wet , apply lubrication oil to the threads of the nut and bolt.

(b) 2-step tightening method,

(c) Tighten cylinder head bolts according to the angle method, tighten to 294 Nm [30 kpm; 217 lbf.ft], then tighten 60° more.

(d) Extremely important to use torque wrench in tightening the piston cooling nozzles. Failure to do so may result in excessive

tightening torque, which may cause valve malfunctions that could lead to seizing of pistons due to insufficient lubrication.

(e) Tighten connecting rod caps according to the angle method, tighten to 245 Nm [25 kpm; 181 lbf.ft], then tighten 60° more.

(f) Left-handed thread.

(g) Apply Moly Disulfide to thread.

(h) Tighten the lock nut to 49 Nm [5 kpm; 36 lbf.ft] firs, then loosen it completely. Retighten to 14,7 Nm [1,5 kpm; 0,8 lbf.ft],

then tighten 80±3° more.

(i) Tighten the lock nut to 69 Nm [7 kpm; 51 lbf.ft] then loosen it completely. Apply Loctite No. 962T to the threads.

Retighten to 9,8 Nm [1 kpm; 7,2 lbf.ft], then tighten 90±3° more.

Plus d'informations sur : www.dbmoteurs.fr

General information

Standard Bolts and Nuts

Fine threads

Thread diameter x pitch mm [in.]

M10 x 1,25 [0.39 x 0.049]

M12 x 1,25 [0.47 x 0.049]

M14 x 1,5 [0.55 x 0.059]

M16 x 1,5 [0.63 x 0.059]

M18 x 1,5 [0.71 x 0.059]

M20 x 1,5 [0.79 x 0.059]

M22 x 1,5 [0.87 x 0.059]

M24 x 1,5 [0.94 x 0.059]

M27 x 3 [1.06 x 0.12]

Coarse threads

M8 x 1,25 [0.31 x 0.049]

M10 x 1,5 [0.39 x 0.059]

M12 x 1,75 [0.47 x 0.069]

M14 x 2 [0.55 x 0.079]

M16 x 2 [0.63 x 0.079]

M18 x 2,5 [0.71 x 0.098]

M20 x 2,5 [0.79 x 0.098]

M22 x 2,5 [0.87 x 0.098]

M24 x 3 [0.94 x 0.12]

M27 x 3 [1.06 x 0.12]

139

194

272

363

468

686

145

210

291

385

487

738

7T kpm

3,4

6,1

9,9

14,8

21,4

29,7

39,3

49,7

75,3

1,7

3,3

5,8

9,5

14,2

19,8

27,7

37,0

47,7

70,0

Strength classification

Standard eyebolts

Thread diameter x pitch mm [in.]

M8 x 1,25 [0.31 x 0.049]

M10 x 1,25 [0.39 x 0.049]

M12 x 1,25 [0.47 x 0.049]

M14 x 1,5 [0,55 x 0.059]

M16 x 1,5 [0.63 x 0.059]

M18 x 1,5 [0.71 x 0.059]

M20 x 1,5 [0.79 x 0.059]

M24 x 1,5 [0.94 x 0.059]

M27 x 3 [1.06 x 0.12]

(Dry)

8±1

Strength classification

15±2

kpm

0,8±0,1

1,5±0,2

lbf.ft

5,8±0,72

10,8±1,45

25±3

34±4

44±5

74±5

98±10

147±15

226±20

2,5±0,3

3,5±0,4

4,5±0,5

7,5±0,5

18,1±2,17

25,3±2,89

32,5±3,62

54,2±3,62

10,0±1,0 72,3±7,23

15,0±1,5

23,0±2,0

108,5±10,8

166,3±14,5

lbf.ft

107

155

215

284

359

544

103

143

200

268

345

506

108

176

262

378

524

694

878

1328

102

167

251

350

489

653

843

1236

3,1

5,9

10,4

17,0

25,6

35,7

49,9

66,6

86,0

126,0

10.9

kpm

6,1

11,0

17,9

26,7

38,5

53,4

70,8

89,5

135,5

123

185

258

361

482

622

911

lbf.ft

129

193

278

386

512

647

980

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General information

Standard union nuts

Strength classification Cap nut size diameter x pitch mm [in.]

M14 x 1,5 [0.55 x 0.059]

M16 x 1,5 [0.63 x 0.059]

M20 x 1,5 [0.79 x 0.059]

M22 x 1,5 [0.87 x 0.059]

M27 x 1,5 [1.06 x 0.059]

M30 x 1,5 [1.18 x 0.059]

M33 x 1,5 [1.30 x 0.059]

M36 x 1,5 [1.42 x 0.059]

(Dry)

157

196

245

294

kpm

lbf.ft

116

145

181

217

High pressure fuel injection pipes

Strength classification Cap nut size diameter x pitch mm [in.]

M12 x 1,5 [0.49 x 0.059]

M14 x 1,5 [0.55 x 0.059]

M18 x 1,5 [0.71 x 0.059]

(Dry)

39±5

49±5

59±1

kpm

4±0,5

5±0,5

6±1,0

lbf.ft

29±3,6

36±3,6

43±7,2

Nominal diameter

100

120

150

180

200

220

254

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General information

Sealants and Lubricants Table

Engine main parts

Cylinder head sealing caps

Sealant ......................

refer to parts catalogue

How to use ................

Coat holes in crankcase

Water outlet connectors (Rocker case)

Lubricant ...................

Grease

How to use ................

Grease O-ring joint

Cylinder liners

Sealant or lubricant ...

Engine Oil

How to use ................

Grease O-ring joint

Front plate, gear case, oil pan, and crankcase

Sealant ......................

refer to parts catalogue

How to use ................

Coat three face-mating portions only

Rear plate, gear case, oil pan, and crankcase

Sealant ......................

refer to parts catalogue

How to use ................

Coat three face-mating portions only

Crankcase plugs

Sealant ......................

Loctite

How to use ................

Apply to threads

Oil pan and crankcase

Sealant ......................

refer to parts catalogue

How to use ................

Coat three face-mating portions only

Front plate, front gear case and timing gear case

Sealant ......................

refer to parts catalogue

Oil Seals

Lubricant ...................

Engine oil

How to use ................

Coat lip of each oil seal

Drive case

Sealant ......................

refer to parts catalogue

How to use ................

Apply to flange surface

Cylinder head gasket

Sealant ......................

refer to parts catalogue

How to use ................

Apply around tappet chambers

Lubrication system

Oil pump, Cover and case

Sealant ......................

refer to parts catalogue

How to use ................

Coat both sides of packing

Cooling system

Fresh water pump, Oil seal

Lubricant ...................

Engine oil

How to use ................

Coat lip of inner seal

Fresh water pump, Unit seal

Lubricant ...................

Coolant

How to use ................

Coat floating seat

Sea water pump, Unit seal

Lubricant ...................

Grease

How to use ................

Apply to surface that contacts bushing

Sea water pump, Oil seal

Lubricant ...................

Grease

How to use ................

Apply to hollow part and lip of oil seal

Inlet system

Air Cooler, between elements, both sides of plate

Sealant ......................

refer to parts catalogue

How to use ................

Fill gap between element and plate.

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Special tools

Special Tools

885423

885422

885391

885410

885413

885386

Rocker bushing tool

Cylinder head lifting

Valve spring pusher

Valve guide remover

Valve guide and seal installer

Valve lapper

885452

885425

885414

885396

885443

885420

Ring pliers

Cylinder liner remover

Piston ring tool

Idler bushing puller

Piston installer

Connection rod bushing installer

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Special tools

885421

885409

885445

885447

885446

885424

Compression gauge adaptor

Compression gauge

To remove/install injection pump gear and waterpump shaft pulley nut.

Tool for lifting piston

Waterpump pliers

Impeller remover

885455

885451

885439

885441

885440

885428

To remove oil and water pump plate and flywheel

Nozzle tester

To remove and install snap ring

Injection coupling gauge

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Special tools

885426

885435

885430

885431

885448

To install front oil seal

To installa rear oil seal

Valve seat cutter shaft

Valve seat cutter

Liner pusher

885429

885432

885450

885449

Bolt for liner pusher

Spacer for liner pusher head bolt

To measure crankcase counter bore depth

To tighten cylinder head bolts

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Overhaul Instructions

Determination of overhaul timing

In most cases the engine should be overhauled when the engine’s compression pressure is low. Other factors that indicate the necessity of engine overhaul are:

Decreased power

Increased fuel consumption

Increased engine oil consumption

Increased blow-by gas volume through the breather due to abrasion of liner and piston rings

Gas leakage due to poor seating of inlet and exhaust valves

Starting problems

G. Increased noise from engine parts

Abnormal color of exhaust gas after warm-up

Anyone or a combination of these symptoms may indicate that engine overhaul is required. Some items listed above are not directly related to the need of an engine overhaul. B and F are more likely to be affected substantially by

●

Injection volume of the fuel injection pump

Fuel injection timing

Wear of injection-pump plunger

●

Fitting of the injection nozzle

Condition of equipment: battery, starter, or alternator

Item D above, however, requires special consideration because decreased pressure, due to wear of the cylinder liner and the piston rings, is one of the most obvious signs that the engine requires overhauling. Test the compression pressure.

Testing the compression pressure

Measure the compression pressure at regular intervals to obtain correct data. If the compression pressure is lower than the repair limit, overhaul the engine.

Remove the injector from the cylinder to be measured. Attach the compression gauge adapter (A) to the adapter and connect compression gauge

(B).

Crank the engine. Read the compression pressure with the engine running at specified speed.

Compression pressure, Mpa (Bar) [psi]

Assembly Standard ...

2.85 (28.5) [263] min.

Repair Limit ...............

2.30 (23.0) [185] max.

IMPORTANT! Measure the compression pressure on all cylinders.

NOTE ! Compression pressure varies with engine speed. Measure the compression pressure at 120 rpm

NOTE ! The compression pressure will be slightly higher on new or overhauled engines. Pressure will drop gradually by wear of parts.

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Adjustments and Benchtesting

Adjustment and Benchtesting

Valve Clearance

Check and adjust the valve clearance on a cold engine. The valve height is adjusted first, and then the clearance of the rocker arm.

IMPORTANT! The engine must under no circumstances be running when checking and adjusting the valve clearance since the valves can knock against the pistons and cause serious damage.

IMPORTANT! Make sure that the stop lever is pulled out and the starter key switched off.

Top dead center on compression stroke

Turn the engine in the normal direction to align the timing mark [1 .6] on the damper with the pointer as shown.

Remove the cylinder cover and make sure the inlet and exhaust valves have some clearance. If the timing mark [1 .6] is aligned with the pointer, either the No. 1 or No. 6 piston is at top dead center on the compression stroke.

Adjust valve height

IMPORTANT! Clearance between valve yoke and rotator should be min. 1.5 mm [0.059 in.]. If not, interference will occur and cause the valve cones to get out of place. If clearance is less than 1.5 mm [0.059 in.] after valve adjustment, consult your dealer.

NOTE! If the valve seats are worn, one valve will differ from another in height, increasing the clearance between the valve stem and yoke, leading to an increased valve clearance.

Unscrew lock nut and adjusting screw on the valves so that there is clearance between the yoke and the valve stem.

Press the valve yoke down.Turn the adjusting screw until it touches the valve stem. Turn an additional 10 degrees. Lock the adjusting screw with the lock nut.

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Adjustments and Benchtesting

Valve clearance inspection

Check the valve clearance with feeler gauges inserted between the rocker arm and yoke cap.

Valve Clearance:

Inlet valve ..................

0.6 mm [ 0.024 in.]

Exhaust valve ...........

0.8 mm [ 0.031 in.]

The clearance is correct if feeler gauge is slightly gripped between the rocker arm and the yoke cap. If the feeler does not fit into the clearance exactly, perform adjustments as described below.

Adjust valve clearance

Loosen the lock nut of the adjusting screw.

Turn the adjusting screw in either direction until the feeler gauge is slightly gripped between the rocker arm and yoke cap.

After adjusting the clearance, tighten the lock nut of the adjusting screw.

Firing order

Check and adjust the valve clearance in the firing order (injection sequence), turning the engine with each cylinder piston at top dead center on compression stroke.

Firing order 1 12 5 8 3 10 6 7 2 11 4 9

(Example): After checking and adjusting the cylinder No.1, turn the engine 60° and check and adjust the cylinder

No. 12.

Cylinder No.

Timing ( ° )

1 12 5 8 3 10 6 7 2 11 4 9

0 60 120 180 240 300 360 420 480 540 600 660

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Adjustments and Benchtesting

How to use the Turning Gear

Loosen the two bolts securing the shaft lock plate and remove the plate from the shaft (groove).

Push in the shaft all the way to the TURN position.

Put a socket to the hexagonal end of the shaft and turn the shaft with a ratchet handle for turning.

After turning the engine, pull the shaft back to the

RUN position, secure the shaft with the locking device and tighten the plate bolts. Make sure the plate is secured properly.

WARNING! Before starting the engine, make sure the turning gear is in the RUN position and is locked.

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Adjustments and Benchtesting

Fuel system bleeding

Prime the fuel filters and fuel injection pump in the following sequence:

Bleeding the Fuel filter

Put the fuel filter switching cock in the left filter bleed position and loosen the left air vent plug.

Turn the priming pump plunger counterclockwise to unlock the mechanism.

Move the plunger up and down until fuel free of air flows out, then tighten the air vent plug.

Put the fuel filter switching cock in the neutral position and repeat the procedure with the other fuel filter.

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Adjustments and Benchtesting

Bleeding the fuel injection pump

Loosen the air vent cock on the fuel injection pump about 1.5 turns.

Pump the priming pump to start the flow of fuel through the system.

When fuel without visible bubbles comes out of the air vent cock, lock the priming pump cap while holding it down. Tighten the air vent cock.

NOTE! Be sure to lock the priming pump cap before tightening the air vent plugs and cock. If not, the cap will not return to the original position due to pressure in the priming pump.

Tighten the priming pump cap by hand until the tightening force increases, normally this occurs after approximately 70 to 90 degrees. Mark this position on the priming pum.

Tighten the priming pump cap an additional 120 to150 degrees using a wrench.

IMPORTANT! If the priming pump cap is tightened too much (more than 240 degrees in total), the top of the pump might be damaged.

IMPORTANT! If the pump cap is not tightened properly, engine vibration may cause excessive wear to the internal threads of the pump. This may cause the priming pump cap to eject and oil to flow out leading to engine failure and damage to the installation.

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Adjustments and Benchtesting

Fuel injection timing

The injection timing is indicated on the caution plate attached to the No. 1 rocker cover. Check it before inspection. Bring the piston for No. 1 cylinder to top dead center on compression stroke as follows:

Turn the engine in the normal direction to align the timing mark [1 .6] on the damper with the pointer as shown.

Remove the No. 1 rocker cover and make sure the inlet and exhaust valves for No. 1 cylinder have some clearance. If these valves have no clearance, turn the engine once again to align the timing mark [1 .6].

NOTE! Do not confuse the No. 1 cylinder with No. 6.

When the piston for the No. 1 cylinder is in the abovementioned position, its inlet and exhaust valve are seated, presenting some clearance.

Turn back the engine approximately 60 degrees, and turn it in the normal direction slowly until the specified timing (indicated on the caution plate) aligns with the pointer.

To ensure proper injection timing, make sure that the timing mark (B) on the coupling flywheel aligns with the pointer (A) on the fuel injection pump.

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Adjustments and Benchtesting

Adjust fuel injection timing

Make sure the timing mark (indicated on the caution plate) is aligned with the pointer, with the piston for the cylinder at top dead center on compression stroke.

Loosen the bolts(C) for the fuel injection pump coupling.

Turn the coupling flywheel until the timing mark(B on the coupling flywheel aligns with the pointer(A) on the fuel injection pump.

Tighten the one nut for fuel injection pump coupling. Turn the engine to tighten the other side nut.

Turn the engine (two turns) to recheck the injection timing for verification.

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Adjustments and Benchtesting

Speed setting

IMPORTANT! When working with speed settings, stand by to stop the engine manually to avoid engine overspeed.

NOTE! The idling speed and maximum speed are set at factory bench testing, and the set bolts are sealed.

These settings are to be inspected and adjusted at

Volvo Penta Workshops only.

NOTE! After adjusting the governor be sure to seal the stopper. Whether the seals are intact or not has bearing on the validity of claims under the warranty.

NOTE! Prior to inspection and adjustment, run the engine until coolant and oil temperature is 70°C

[158°F] or higher.

PSG Governor

Check and adjust idling speed setting

Make sure the speed control lever is in idling position, measure engine rpm.

If idling speed is out of the specified range, reset with the adjust screw (1).

Check and adjust no-load max. speed setting

Move speed control lever to max. speed, measure engine rpm.

If max. speed is out of the specified range, reset with the governor set bolt (2).

Manually change the engine speed to test the governor response, its ability to sense changes in speed and adjust it promptly to nominal speed.

Correcting hunting

If the engine hunts, adjust with the needle valve

(3). Open the needle valve (counterclockwise, 2 to 3 rotations) until the engine hunts. Keep it hunting for 30 seconds, until air is vented from the governor.

Slowly close the valve until the hunting stops.

NOTE! If the needle is closed too far, speed regulation with respect to changes in load will be delayed.

Keep the valve backed off at least 1/4 rotation from the fully closed position.

Seal all set bolts.

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Adjustments and Benchtesting

Measure V-belt deflection

Measure the deflection of the belt. Apply approximately 98 to 147 N (10 to 15 kgf) [22 to 33 lbf] force midway between the pulleys. The deflection should be approximately 10 to 15 mm [0.4 to 0.6 in.]. Adjust the belt if the deflection is not correct.

Alternator

Remove the V-belt cover.

Loosen the mounting bolts (1) of the alternator and the adjusting rod(2).

Loosen the upper- and lower-side lock nuts (3) of the adjusting rod.

NOTE! Turn the nut below the adjusting rod to the left to tighten.

Set the tension of the V-belt properly by turning the adjusting rod (2).

After setting the tension, tighten the upper- and lower-side lock nuts.

Tighten the mounting bolts to fix the alternator.

Set the belt cover and front cover properly.

Raw water pump

Remove the front belt cover.

Loosen the tension pulley bracket(1) mounting bolts(2).

While loosening lock nut(3), turn the adjusting bolt(4) and set the tension of belt properly.

While maintaining this condition, tighten lock nut and the mounting bracket bolts.

Set the front belt cover properly.

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Bench testing

An overhauled engine should be performance tested on a dynamometer. This test is also for breaking in the major running parts of the engine. To test the engine, follow these procedures:

Start Up

Check levels in radiator, oil pan, and fuel tank.

Prime the fuel and cooling systems.

Crank the engine for about 10 seconds to permit lubricating oil to circulate through the engine.

NOTE! Do not supply fuel to the engine, place the stop lever in stop position.

Move the speed control lever slightly in the direction of increasing fuel injection, turn the starter switch to START to start the engine. Do not move the control lever to “full fuel injection” position.

After the engine starts, let it idle under no load by operating the speed control lover.

Inspection after Start Up

After starting up the engine, check the following points. If you find anything wrong, immediately stop the engine and investigate the cause.

Lubricating oil pressure should be 0.49 to 0.64

Mpa (5 to 6.5 kgf/cm2) [71 to 92 psi] at rated speed or over 0.20 to 0.29 Mpa (2 to 3 kgf/cm2)

[28 to 43 psi] at idling speed.

Coolant temperature should be 71 to 85°C [165 top 185°F].

Check for leakage of oil, coolant, fuel, especially oil pipe connections for turbocharger lubrication.

Knocking should die away as coolant temperature rises. No other defective noise should be heard.

Check exhaust color and for abnormal odors.

Adjustments and Benchtesting

Bench test (dynamometer) conditions

Summary table of bench testing conditions.

Step 1

Speed (rpm) ..............

Idling

Load ..........................

No load

Time (min.) ................

Step 2

Speed (rpm) ..............

1000

Load ..........................

No load

Time (min.) ................

Step 3

Speed (rpm) ..............

1200

Load ..........................

No load

Time (min.) ................

Step 4

Speed (rpm) ..............

Rated*

Load ..........................

25%

Time (min.) ................

Step 5

Speed (rpm) ..............

Rated*

Load ..........................

50%

Time (min.) ................

Step 6

Speed (rpm) ..............

Rated*

Load ..........................

75%

Time (min.) ................

Step 7

Speed (rpm) ..............

Rated*

Load ..........................

100%

Time (min.) ................

*Rated speed: Varies according to specifications.

After Bench Testing

Adjust valve clearance

Adjust injection timing

Re-tighten external bolts and nuts

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Auxiliaries removal and installation

Engine auxiliaries removal and installation

This section explains the procedures and tips for removal and installation of the accessories – the preliminary process to go through for overhauling the engine.

Preparation

Shut off the fuel supply, and disconnect the starting system from the engine.

Loosen the drain cocks, on the left rear side of crankcase, and drain coolant.

Loosen the oil pan drain plug, and drain engine oil.

Oil capacity: 230 l [60.8 U.S. gals] (Whole engine)

WARNING! Hot engine oil can cause personal injury if it contacts the skin. Be careful when draining the oil.

Engine Auxiliaries Removal

Removing the belt cover and tension pulley

Remove the front belt cover (1) and (2).

Loosen the adjusting bolt of the tension pulley

(3), then remove the V-belts.

Unscrew each mounting bolt of the tension pulley, then remove the tension pulley.

Removing the expansion tank

Remove the right- and left-hand couplings (1), then disconnect the connection from the thermostats.

Unscrew the mounting bolts of the expansion tank (2), then remove the expansion tank.

Remove the tank bracket (3).

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Auxiliaries removal and installation

Removing the thermostat housing

Remove the coupling (1).

Remove the bypass pipes (2) and

(3).

Remove the right- and left-hand thermostat housings (4).

Remove the thermo-brackets (5) and (6).

Removing the raw water pump

Remove couplings (1), (2) and (3).

Remove raw water pipes (4), (5),

(6), (7), (8), (9), (10) and (11).

Unscrew the raw water pump (12) mounting bolts, and remove it.

Raw water pump weight: approx. 35 kg [77.2 lb]

Remove the pump bracket (13).

Remove the bracket (14).

Remove the pipe stays (15) and

(16).

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Auxiliaries removal and installation

Removing the air duct

Remove the air duct (1).

Removing the exhaust manifolds

Remove the couplings (1) and the joints (2).

Unscrew the manifold mounting bolts, then remove the manifolds (3) and the gaskets (4).

NOTE! When installing the manifold, place each gasket with its side marked as “MANIFOLD” facing the manifold.

Removing the turbochargers and the exhaust pipe

Remove the turbocharger oil pipes

1 Stay

2 Oil pipe

3 Oil pipe

4 Drain connector

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Auxiliaries removal and installation

Unscrew each mounting bolt of the turbocharger

(5), then remove the turbochargers.

Turbocharger weight: approx. 48 kg [105.8 lb]

Remove the exhaust pipe joints (6), then remove seal rings (7).

Unscrew each mounting bolt of the exhaust pipe

(8), then remove the exhaust pipe.

Exhaust pipe weight: approx. 30 kg [66.1 lb]

Remove the brackets (9).

Remove the turbocharger brackets (10).

Remove the exhaust pipe stays (11).

Removing the air cooler

Remove the sea water pipe (1).

Remove the connectors (2) and (3).

Unscrew two bolts (M12 x 1.75 mm [0.47 x 0.069

in.] on the upper-side of the air cooler cover (4), then using eye-bolts, slide the air cooler cover towards the front to remove.

Using thread (4 locations) M8 x 1.25 mm [0.31 x

0.049 in.]) on the upper-side of the air cooler, slide the air cooler element (7) towards the front and remove.

Air cooler element weight: approx. 60 kg [132 lb]

Remove the plates (8) and (9) at the front med rear.

Slide the air cooler case (10) towards the front and remove.

Using thread (4 locations) (M8 x 1.25 mm [0.31 x

0.049 in.]) on the air cooler element, slide the air cooler element (11) towards the front and remove.

Remove the plates (12) and (13) at the front and rear.

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Auxiliaries removal and installation

Removing the alternator

Remove the belt covers (1) and (2).

Loosen belt adjustment turnbuckle (3), and remove V-belt (4).

Remove bracket (5), and dismount alternator (6).

Removing the water pump

Remove the nut (1) at the end of the water pump shaft. Remove the alternator driving pulley (2).

Remove the water pump (3) by unscrewing the bolts and nuts.

Weight: approx. 33 kg [73 lb]

Removing the oil pump

Remove the connection stay(1) from the oil pipe located under the oil pump.

Unscrew the oil pump mounting bolts, then remove the oil pump(2).

Weight: approx. 25 kg [55 lb]

Removing the speed control

Remove the lock nut from the governor lever (1) to disconnect the control cable (2) from the governor lever.

Remove the control bracket (3) and the speed control knob as a set.

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Auxiliaries removal and installation

Removing the governor oil filter

Remove the oil pipes (1), (2) and (3).

Remove the governor oil filter (4).

Remove the bracket (5) and the oil tank stay (6).

Removing the governor

Remove the drain pipe (1).

Disconnect the governor link (2).

Remove the governor (3).

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Auxiliaries removal and installation

Removing the fuel control linkage

Remove each control link (1) from the right- and left-hand injection pumps.

Remove the R. H. link (2) and the L. H. link (3).

Remove the link lever (6) and the L. H. lever (7) on the left side.

Remove the spring (8) and the L. H. lever (9).

Remove each bearing cover (10) on both rightand left-side.

Remove the snap ring (11), the pipe (12), and the control shaft (13).

Remove the R. H.0 lever bracket (14) and the L.

H. lever bracket (15).

Removing the stop solenoid

Disconnect the linkage (1).

Remove the stop solenoid (2).

Remove the stop solenoid bracket (3).

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Auxiliaries removal and installation

Removing the fuel pipes (right- and left-hand) (Follow the same procedure for both sides)

Remove leak-off pipe(1) connecting the right- and left-side injection pumps.

Remove leak-off pipe(2) from the injection pump.

Remove six fuel pipes(3) as a set.

Remove six leak connectors(4).

WARNING! Cover the openings of the injection pump and nozzle inlet connectors with rubber caps to prevent dust from entering the system.

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Auxiliaries removal and installation

Removing the fuel leak-off pipes

Disconnect the fuel leak-off pipes (1),(2), and (3).

Remove all fuel leak-off pipes (4) on both sides.

Removing the fuel filters (right- and left-hand) (Follow the same procedure for both sides)

Disconnect the fuel pipe (1).

Remove the fuel pipes (2), (3), and (4).

Remove the fuel filter (5).

Remove both fuel filter brackets (6) and the pipe stay (7).

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Removing the fuel injection pumps (right- and left-hand)

Auxiliaries removal and installation

Remove the oil pipes (1) and (2), and the drain pipe (3) of the right-side.

Remove the coupling cover (4).

Remove two coupling connecting bolts (5).

Remove pump mounting bolts (6) and (7).

With the coupling attached to the injection pump

(leave the laminated plate on the drive shaft), lift the injection pump to dismount.

Weight: approx 60 kg [132 lb]

Removing the sea water pipes

Remove the couplings (1) and (2).

Remove the sea water pipes (3), (4), and (5).

Unscrew the bracket mounting bolts, and remove the bracket (8).

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Auxiliaries removal and installation

Removing the right oil cooler

Remove oil pipes (1) and (2).

Remove the clip, and dismount the oil pipe (3).

Unscrew the oil cooler mounting bolts, then remove the oil cooler (4).

Weight: approx. 20 kg [44 lb]

Removing the left oil filter and oil cooler

Remove four oil filter elements (1).

Disconnect the oil pipes (2).

Unscrew the oil cooler inlet connector mounting bolts, and disconnect the connector (3).

Remove the oil thermostat (4).

After unscrewing the oil filter bracket mounting bolts, remove the filter bracket (5) complete with the oil cooler.

Weight: approx. 50 kg [110 lb]

Removing the oil filler and the oil level gage

Remove oil filler (1) by unscrewing mounting bolts.

Remove the oil level gauge (2) and the stay (3).

Removing the starters

Remove starters (1) by unscrewing the starter mounting bolts.

Weight: approx. 19 kg [42 lb]

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Auxiliaries removal and installation

Engine Auxiliaries Installation

To install the engine auxiliaries, follow the removal procedures in reverse. After installation, service them as follows:

Refill the engine with the recommended oil up to the specified level.

Refill the cooling system with coolant.

For easy engine starting, pour engine oil for the governor into the oil filter from its vent plug.

Check each pipe connection for oil or coolant leaks.

Prime the fuel system.

Installation of the fuel injection pump is described below. After installing the fuel injection pumps, be sure to inspect and adjust the injection timing. (Refer to Section 1.3 of Chapter 5, “Adjustments and Bench Testing.”

Fuel Injection Pump Installations:

Right Injection pump

Turn the crankshaft in normal direction to align the timing mark “1

●

6” on the viscous damper with the pointer.

NOTE! Verify the injection timing by referring to the caution plate attached to the No. 1 rocker cover.

Move the No. 1 cylinder inlet and exhaust valve rocker arms to make sure that they are not being pushed up by the push rods.

Turn the crankshaft about 60° in reverse. Turn it a little at a time in the normal direction to align the timing mark on the damper with the pointer.

Install the coupling to the injection pump, then align the pointer (1) on the pump case with mark

(2) on the coupling.

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Auxiliaries removal and installation

Connect the pump drive coupling (3) to the drive shaft. Loosen the coupling mounting bolts.

Put the pump case on the pump bracket, then tighten the mounting bolts (4) temporarily.

Connect the fuel pipe and the oil pipe to the injection pump.

Tighten the two coupling bolts (5) temporarily.

Insert the side of the Injection coupling gauge (A) marked with “GO” to determine clearance (B) between the flywheel and coupling, then tighten the bolts to specified torque.

NOTE! Only the side marked with “GO” should fit into the gap. If not, loosen the bolt and readjust the clearance.

Flywheel and coupling clearance, mm[in.]

Standard clearance ...

49±0.25 [1.93±0.010

10. Tighten the pump mounting bolt (4) firmly. Be sure that the coupling mark (B) aligns with the pump case pointer (A). Tighten the two connecting nuts (5) to specified torque.

11. Tighten the shaft tightening bolt (6) of the coupling to specified torque.

NOTE! Coupling damage or wrong injection timing can be caused by improper tightening of bolts.

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Auxiliaries removal and installation

Fuel Injection Pump Installation:

Left Injection Pump

Align the timing marks “7

●

12” on the viscous damper with the pointer. Make sure that bolt inlet and exhaust valves of the No. 7 cylinder piston is at top dead center of the compression stroke.

Follow the procedures described for the right injection pump.

Adjust injection quantities of pumps

Check to make sure the output shaft of the governor is positioned on the side marked with “0” (noinjection side).

Install governor lever (1) at an angle of 20°.

Install links (2) on the right- and left-hand banks, making sure that the installation length is 62±0.7

mm [2.4±0.028 in.].

Install the link (3) on the right-hand bank.

NOTE! Link (3) has a fixed length of 239 [9.3 in.].

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Auxiliaries removal and installation

Install the link (4) on the left-hand bank, length should be 239 mm [9.4 in.] (same as for the righthand bank).

Install the rod (5) and adjust the length of the rod to a distance of 68±0.5 mm [2.68±0.020 in.] between the rack end surface and the pump case end surface.

NOTE! More than 8 mm [0.35 in.] of threads of the rod and ball joint should be engaged on both ends.

The rack stroke should be approximately 2 mm

[0.08 in.] when the stop lever (6) is pulled fully to the STOP side.

RUN-OFF solenoid

Adjustment

Supply power to solenoid (1) (contracted).

Loosen nuts (2) and (3).

Rotate rod (4) to adjust the clearance between lever (5) and follower (6) to be from 0.5 to 1.0 mm

[0.020 to 0.039 in.].

Tighten nuts (2) and (3).

Inspection

Cut off power to solenoid (1) (extended).

After adjusting the exhaust temperature, run the engine at high idling speed.

Supply electric current to solenoid (1) (contracted condition).

After the engine stops completely, check to make sure the distance between the rack end surface and pump case end surface is 68 to 69 mm [2.68

to 2.72 in.] on both banks.

NOTE! It should be noted that the engine may not stop if the distance between the rack end surface and pump case is 70 mm [2.76 in.] or more.

NOTE! When adjusting the adjusting rod, make sure the rack moves without interference. If the rack does not move smoothly, the governor cannot operate properly.

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Group 21 Engine Body

Cylinder heads and valve mechanism

Group 21 Engine Body

Disassembly:

1. Rocker cover

2. Fuel inlet connector

3. Nut, washer

4. Injection nozzle gland

5. Injection nozzle

6. Gasket

7. O-ring

8. Adjusting screw

9. Bolt

10. Rocker

11. Spacer

12. Rockershaft

13. Bridge cap

14. Valve bridge

15. Push rod

16. Rocker case

17. Water outlet connector

18. Cylinder head bolt

19. Cylinder head

20. Inlet port packing

21. Exhaust connector

22. Valve cotter

23. Valve rotator

24. Valve spring

25. Stem seal

26. Valve

27. Cylinder head gasket

28. Tappet

Look for:

A. Cracks, oil leaks, deterioration

B. Cracks, damage, carbon and scale deposits

C. Wear

D. Damaged threads

E. Wear, clogged oil hole

F. Distortion, cracks

G. Matching, wear

H. Worn stem or face, corrosion, damage, or carbon deposits

I. Cracks, damage, deterioration, rubber parts cracked

J. Worn ends, distortion

K. Worn cam contact face or sliding surface

L. Replace gasket

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Group 21 Engine Body

Removing fuel injector assemblies

Remove the fuel inlet connector and the nozzle gland

Use the Nozzle remover to remove the injector assembly. Take out the gasket if it is left behind in the cylinder head.

Store the injector and the inlet connector as a set to avoid swapping. Pay attention not damage the nozzle.

Removing the rockershaft assemblies

Loosen the adjusting screw of each rocker.

Store the shaft assembly and mounting bolts together as a set.

Disassembling rockershaft assemblies

Arrange the disassembled rockers in the order removed, so you can install them in that order at reassembly. This will ensure the same rockershaft clearance as before.

Remove the valve bridge

Remove the valve bridge and bridge cap.

NOTE! Do not drop the bridge cap or other parts into the crankcase through the push rod hole.

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Group 21 Engine Body

Removing the rocker cases

Remove the snap ring of the water outlet connector. Slide the connector towards the snap ring.

Unscrew the rocker case mounting bolts, then remove the rocker case from the cylinder head.

Removing cylinder head assemblies

Each cylinder head is located relative to the crankcase with dowel pins. Use the Eye nut to lift the head off the crankcase at a slant.

Cylinder head weight: approx. 35 kg (77 lb)

Remove the cylinder head gasket

IMPORTANT! Do not damage the cylinder head or crankcase surfaces when you remove the gasket with a screwdriver or other tool.

Removing valves and valve springs

Use the valve spring pusher to compress the valve spring squarely, then remove the valve cotters.

NOTE! If the valves are to be reused, do not change the combination of the valve seat and valve guide.

Removing studs, guides, etc.

Do not remove the nozzle gland mounting studs or the bridge guide from the cylinder head unless absolutely necessary. If any of these parts have been removed, apply thread adhesive to the threads when installing it or a new part to the cylinder head.

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Group 21 Engine Body

Inspection and Repair

Rocker Bushings and Rockershaft

Measuring rocker bushing inside diameter and rockershaft diameter. If the measurement exceeds the service limit, replace the bushing or shaft.

Rocker bushing inside diameter, mm [in]

Normal Value ............

Ø36 [1.42]

Assembly Standard ...

36.000–36.040 [1.41732–1.41889]

Service limit ..............

36.090 [1.42086]

Rockershaft diameter, mm [in]

Normal Value ............

Ø36 [1.42]

Assembly Standard ...

35.966–35.991 [1.41598–1.41697]

Service limit ..............

35.940 [1.41496]

Replacing rocker bushings

Use the Rocker bushing tool to remove the rocker bushings for replacement.

NOTE! Press a new bushing into the rocker from the chamfered side(1) of the bore.

NOTE! Align the oil holes in the bushing and rocker.

NOTE! Check bushing joint mark(2)

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Group 21 Engine Body

Valve Guide and Valve Stems

Measure valve stem and valve guide.

The valve guide wears more rapidly at its ends than at any other location. Measure the inside diameter of the guide at its ends in two directions. If the service limit is exceeded, replace the guide.

Valve stem diameter, mm [in]

Normal Value ............

Ø10 [0.39]

Assembly Standard ...

9.940–9.960 [0.39134–0.39213]

Service limit ..............

9.910 [0.39016]

Valve guide inside diameter, mm [in]

Normal Value ............

Ø10 [0.39]

Assembly Standard ...

10.000–10.015 [0.39370–0.39429]

Service limit ..............

10.060 [0.39606]

Replacing valve guides and stem seals

Use the Valve guide remover to remove the valve guide for replacement.

Use the Valve guide seal installer to install slowly a new guide with a press.

IMPORTANT! The installation depth for the valve guide is specified, so use the Valve guide seal installer to secure the correct depth.

IMPORTANT! Do not apply any oil or sealant to the surface of the stem seal that comes in contact with the valve guide. When installing the stem seal, apply lub oil to valve stem to ensure initial lubrication of the stem seal lip.

IMPORTANT! Use a new stem seal whenever removed.

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Group 21 Engine Body

Valves and Valve Seats

Inspecting the valve

Coat the valve face lightly with red lead. Use the

Valve lapper to inspect the valve contact with its seat.

If the contact is not uniform, or if the valve is defective, or if the repair limit is exceeded, repair or replace the valve and valve seat.

NOTE! Inspect the valve face after the inspection or replacement of the valve guide.

NOTE! When you press the valve coated with red lead into the valve seat, do not rotate the valve.

A. Good contact

B. Bad contact

Valve seat, mm [in]

Angle (A)

Assembly Standard ...

30°

Valve sinkage (depth)(B)

Assembly Standard ...

-0.2–0.2 [-0.008–0.008]

Repair limit ................

1.0 [0.039]

Width (C)

Assembly Standard ...

2.15–2.45 [0.0846–0.0965]

Repair limit ................

2.8 [0.110]

Valve margin (thickness)(D), mm [in]

Assembly Standard ...

2.8–3.2 [0.110–0.126]

Repair limit(refacing) .

2.5 [0.098]

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Group 21 Engine Body

Refacing the valve face

If the valve face is badly worn, reface it with a valve refacer

NOTE! Set a valve refacer at an angle of 30°.

NOTE! Grind the valve as little as possible. If the margin seems to exceed the repair limit as a result of grinding, replace the valve.

Refacing valve seats

Use the Valve seat cutter or a valve seat grinder to reface the valve seat. After refacing, grind the seat lightly using #400 grade sandpaper inserted between the cutter and valve seat.

Lap the valve in the valve seat.

NOTE! Cut or grind the valve seat only as needed for refacing.

NOTE! Replace the valve seat if the seat width is more than the repair limit as a result of wear or cutting.

NOTE! Replace the valve seat if the valve sinkage exceeds the repair limit after refacing.

Replacing valve seats

Weld a stud(1) to the valve seat(2). Insert a shaft(3) into the valve guide holder from the upper side of the cylinder head. Drive the seat off the head as shown.

NOTE! When you weld the stud, do not permit splatter to come in contact with the machined surfaces of the cylinder head.

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Group 21 Engine Body

Before inserting a new valve seat, measure the inside diameter of the cylinder head bore and the outside diameter of the valve seat to make sure that clearance (fit) is within clearance standards.

Valve seat dimensions, mm [in.]

Cylinder head bore diameter (A)

Nominal value ...........

60.000-60.030 [2.36220-2.36338]

Valve seat diameter (A)

Nominal value ...........

60.100-60.130 [2.36614-2.36732]

Cylinder head bore / Valve seat clearance

standard clearance* ..

-0.070 – -0.130 [-0.00276 – -0.00512]

Nominal value ...........

3.6 [0.142]

Nominal value ...........

8.0 [0.315]

Nominal value ...........

11.6–11.7 [0.4567–0.4606]

*A minus (–) indicates interference.

Chill the valve seat in liquid nitrogen -70°C

[-274°F] for more than 4 minutes with the cylinder head kept at normal temperature, or heat the cylinder head to 80 to 100 °C [176 to 212 °F] with the valve seat chilled in ether or alcohol containing dry ice.

Use the Installer to install the valve seat.

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Group 21 Engine Body

Lapping valves in valve seats

Be sure to lap the valves in the valve seats after the seats has been replaced.

Coat the valve face lightly with a lapping compound.

Lap the valve in the seat using the valve lapper.

Raise the valve off the seat, then rotate the valve only a partial turn and strike it against the seat.

Wash off the compound with diesel fuel.

Coat the valve face with engine oil, then lap the valve again.

Check the valve face for contact.

NOTE! Do not permit the compound to come in contact with the valve Stern.

NOTE! Use a compound of 120 to 150 mesh for initial lapping and a compound finer than 200 mesh for finish lapping.

NOTE! Mixing the compound with a small amount of engine oil will facilitate coating.

Valve spring clearance and free length

Measure the free length and clearance of each valve spring. If the free length or clearance (perpendicularity) exceeds the service limit, replace the spring.

Free length (A), mm [in.]

Assembly standard ...

73 [2.87]

Service limit ..............

71 [2.80]

Perpendicularity (B), mm [in.]

Service limit ..............

2.2 [0.087] (at end)

Length under test force, mm [in.]

Assembly standard ...

66.0 [2.6]

Test force, N (kgf) [lbf]

Assembly standard ...

289–319 (29.45 to 32.55) [65 to 72]

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Group 21 Engine Body

Bridge-to-rotator clearance

When clearance is less than 1.5 mm [0.059 in.], check the valve stem top for cupping. If the stem top is badly cupped, replace the valve to obtain more than 1.5 mm [0.059 in.] clearance.

Check the condition of the bridge cap. Replace it if it is badly worn.

Tappets and Push Rods

Inspecting tam contact faces of tappets

Replace the tappets if their tam contact faces are abnormally worn.

Measuring valve pushrod deflection

If the deflection exceeds the assembly standard, replace the push rods.

Push rod deflection, mm [in.]

Assembly standard ...

Less than 0.5 [0.020] max.

Cylinder Head

Measuring head gasket flatness of surface

Use a straight edge and feeler gauges to measure warping on each cylinder head. If warping exceeds the repair limit, reface the gasket surface with a surface grinder.

Flatness, mm [in.]

Assembly standard ...

<0.03 [0.0012]

Repair limit ................

0.07 [0.0028]

Service limit ..............

0.50 [0.0197]

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Group 21 Engine Body

Reassembly

Reassembly sequence:

Reverse the order of disassembly.

Installing tappets

Insert tappets coated with engine oil into the tappet holes and make them seat softly on the camshaft.

Installing cylinder head gaskets

Clean the gasketed surfaces of the cylinder head and crankcase thoroughly with a solvent or degreasing solution.

Apply a thin coat of Three Bond 1211 to areas 5 to 8 mm [0.197 to 0.315 in.] from the periphery of the head gasket, around tappet holes and oil passage holes, on both sides of the head gasket (to areas indicated in the diagram on the right).

Spread the liquid gasket with a finger to a thickness of 0.2 to 0.5 mm [0.008 to 0.020 in.].

NOTE! Liquid gasket should be applied to areas indicated in the diagram on the right. Do not apply an excessive amount of liquid gasket, since it can press the head gasket O-rings and cause deformation.

NOTE! Do not allow liquid gasket to adhere within an area of 10 mm [0.394 in] around the cylinder bore (A), this may cause gas leakage. Sections B and C are very close to O-rings. Make sure that there is no large amount of liquid gasket on the edge at these sections.

Install the gasket before the liquid gasket dries.

Place the gaskets on the crankcase, making sure that the dowel pins enter their holes in the gaskets.

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Group 21 Engine Body

Reassembly of the cylinder heads

Coat the valve Stems with engine oil, then insert them into the valve guides.

Install the valve springs and rotators to the valve guides. Compress each valve spring with the

Valve spring pusher, then install the valve cotters on the valve Stem.

Lightly tap on the top of each valve stem with a soft-faced mallet to make sure that the valve spring and cotters are properly installed.

Install cylinder head assemblies

IMPORTANT! Before you install the cylinder head assembly, measure the protrusion of each piston. Make sure that the protrusion is correct.

Install the exhaust connector to the cylinder head, while pushing down the exhaust connector so it touches the edge of the bolt hole.

NOTE! Place the gasket so its ”MANIFOLD” printed side aligns with the connector side.

Install the Eye nut to the stud bolt, and lift up the cylinder head assembly. Locate the head aligning its holes with the dowel pins, and keep the head being slightly separated from the cylinder. Apply engine oil to the threads and bearing surfaces of head bolts, then wipe off the excessive oil before tightening.

Tighten the cylinder head bolts with the specified torque in the order shown in the drawing.

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Group 21 Engine Body

Tightening cylinder head bolts

Place the Head bolt plate on the cylinder head.

Tighten each head bolt to 294 N l m (30 kgf l m)

[217 lbf l ft] torque (initial torque).

The head bolt plate has graduations at 30° intervals. Place a reference point mark on each head bolt.

Tighten each bolt 30°. After tightening all bolts, turn each bolt another 30° (totally 60°).

Installing the rocker case

Insert the water outlet connector fully into the rocker case.

Install the rocker case so it meets the dowel pins

Tighten the rocker case mounting bolts to the specified torque.

Insert the water outlet connector by sliding it from the next rocker case after coating the O-ring with grease. Install the snap ring.

Installing valve bridges and caps

Coat the bridge guides with engine oil (A), then install the bridges to the guides with the adjusting screws positioned on the exhaust manifold side.

Coat the bridge contact face of the bridge caps

(A) with engine oil. Install the caps in position, being careful not to let them fall into the crankcase through the push rod holes.

Installing rocker shaft assemblies

Install the spacer (A) on the rocker shaft and mount the rockers on both sides.

Align the pin hole of the rocker shaft with the positioning pin, and install the rocker shaft assembly to the rocker case. Move the rocker arm up and down to make sure that the arm is free.

NOTE! While tightening the bracket mounting bolts temporarily, install the bracket in place so the rocker tip comes in contact with the bridge caps evenly.

NOTE! Tighten the long bolt securing the head and rocker bracket first, then tighten the short bolt to the specified torque.

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Group 21 Engine Body

Install fuel injector

Disconnect the fuel inlet connector from the injector assembly.

Put three O-rings on the injector and coat them with grease.

Coat the gasket with grease and attach it to the injector. Insert the injector assembly into the cylinder head aligning its connector hole with the rocker case hole.

IMPORTANT! The grease must be high temp.

resistant and must not cover the nozzle holes.

Tighten the fuel inlet connector to the specified torque.

Tighten nozzle gland mounting nut to the specified torque

NOTE! Maintain equal distances between the fuel inlet connector and the cylinder head before tightening the gland to the specified torque.

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Group 21 Engine Body

Cylinder liners, Pistons and Connecting rods

Disassembly:

1. Bolt

2. Connecting rod cap

3. Connecting rod bearing (lower shell)

4. Top compression ring

5. Second compression ring

6. Oil ring

7. Snap ring

8. Piston pin

9. Piston

10. Connecting rod

11. Connecting rod bushing

12. Connecting rod bearing

Look for:

A. Wear, scratches, damage

B. Fatigue

C. Scratches, cracks, damage, wear, carbon deposits on outside surface

D. Cracks, clogged oil hole

E. Scratches, wear on inside surface, rust on outside surface

F. Damage

G. Wear, scratches, discolored inside surface

H. Scratches, seizure, wiping out of overlay on both sides

I. Damaged threads

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Group 21 Engine Body

Removing connecting rod caps

Open the inspection hatches, remove the connecting rod caps. For identification, mark the removed connecting rod bearing with cylinder number and upper or lower shell.

IMPORTANT! Handle bearings with care.

Removing pistons

Preparations

Use a cloth or oil paper to remove all carbon deposits from the upper areas of the cylinder liner.Carbon deposits make it difficult to pull the piston out.

Removing pistons in right bank cylinders

Turn the crankshaft to bring the piston assembly

(from which the connecting rod cap has been removed ) to top dead center.

Turn the crankshaft in reverse until the crank pin comes off the connecting rod and the bolt hole of the rod is visible through the inspection hatch on the side of the crankcase.

1.

2.

Cover a bar with a cloth for protection. Put the tip of the bar under the bottom of the big end of the connecting rod and pry the bar slightly downwards using the crank pin as a fulcrum. This will push the piston assembly upwards.

NOTE! If you insert the turning bar too far, you may not be able to pry the piston assembly upwards. Insert the bar 10 to 20 mm [0.39 to 0.79 in.] beyond the big end.

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Group 21 Engine Body

Turn the crankshaft a little at a time to raise the crank pin (fulcrum), while pushing the outer end of the bar, to further raise the piston assembly.

IMPORTANT! Raise the piston assembly carefully so that the connecting rod don’t interfere with the oil jet nozzle for piston cooling.

When the oil ring of the piston comes out of the cylinder liner, lower the piston a little and carefully rest the oil ring on the edge of the liner.

NOTE! To avoid damage to the oil ring, lower the piston slowly and carefully. Do not rotate the piston.

Holding the compression ring portion of the piston and carefully pull the piston from the cylinder liner. Rest its skirt on the top of the crankcase.

Hold the piston pin portion of the piston, and lift the piston assembly off the liner.

Removing pistons in left bank cylinders

Removal procedure is the same as that for removing pistons in right bank cylinders. The only difference is that the position of the crank pin and the direction of the crankshaft rotation for removal are reversed.

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Group 21 Engine Body

Using the Piston remover

Turn the crankshaft to bring the piston assembly to 50° after top dead center for the left bank.

Attach the Piston remover to the top of the piston.

Grip the handle of the remover, then lift the piston and the connecting rod off the liner.

IMPORTANT! Do not damage the piston when you pull it out from the cylinder liner. Do not let it hit the connecting rod with its skirt. Support the connecting rod to avoid the cylinder liner bore from scratching.

Removing the piston ring

Use the Piston ring tool to remove I the piston rings.

Removing piston pins

Use the Ring pliers to remove the snap rings.

Remove the piston pin to separate the piston from the connecting rod.

If it is difficult to pull out the pin, heat the piston with a piston heater or in hot water to expand the pin bore.

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Group 21 Engine Body

Inspection and Repair

Cylinder Liners

Inside diameter

Measure the inside diameter of each liner in two directions, parallel and transverse to the piston pin, at three positions, top (weared position), middle and low. If measurements exceed the service limit, replace the liner.

Cylinder liner side diameter, mm [in.]

Normal value .............

Ø170 [Ø6.69]

Assembly standard ...

170.000–170.040 [6.69290–6.69447]

Service limit ..............

170.500 [6.71259]

Measuring cylinder liner protrusion

Measure the protrusion of each liner at its flange with a dial gauge.

NOTE! The method of measuring the protrusion of an used liner differs from that of newly installed one.

Cylinder liner protrusion at flange (A), mm [in]

Assembly standard ...

0.11–0.20 [0.0043–0.0079]

IMPORTANT! If the protrusion is less than the assembly standard, the gasket will fail to seal the bore resulting in gas leakage.

When cylinder head has just been removed

Clean the gasketed surface of the crankcase and the top of the liners.

Secure the top of the liner uniformly at four places with the Liner pusher and the Bolts.

NOTE! Use the Head bolt spacers when tightening the Line pushers using head bolts.

Set up the dial gauge at the top face of the crankcase, then set the gauge pointer to zero (0).

Measure the protrusion at four places at the flange of the liner. Take the average of the four measurements.

If the average is less than the assembly standard, insert a shim under the collar of the cylinder liner.

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Group 21 Engine Body

When replacing cylinder liner

Remove the cylinder liner (Refer to section Replace cylinder liners) and observe the cylinder liner contacting surface to the crankcase.

If the cylinder liner contacts the crankcase only on one side, use a rotary grinder to grind the surface to keep the differences of depth in four positions within 0.05 mm [0.0020 in.].

Use the Projection plate (B) and measure the counter bore depth of the crankcase in four positions and obtain the average.

Subtract the Projection plate thickness from the measured counter bore depth to obtain the actual counter bore depth from the top surface of the crankcase.

Crankcase counter bore depth (A), mm [in]

Assembly standard ...

14.00–14.05 [0.5500–0.5520]

Measure the thickness of the cylinder liner collar.

Thickness of cylinder liner collar, mm [in]

Assembly standard ...

14.16–14.20 [0.5563–0.5579]

Subtract the crankcase ridge depth from the cylinder liner collar thickness. This value is the cylinder liner protrusion.

If the value is less than the assembly standard, insert a shim under the collar of the cylinder liner.

Measuring step height of cylinder liner collar

Place a dial gauge on the rim of the liner collar, and set the indicator to 0 (zero).

Measure the cylinder liner step at four locations, and obtain the average.

Cylinder liner step height, mm [in]

Assembly standard ...

0.16–0.24 [0.006–0.010]

If the average is less than the assembly standard or if the step has sectional chipping, replace the cylinder liner.

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Group 21 Engine Body

Cylinder liner shim

Insert a shim between the cylinder liner and the crankcase.

NOTE! Select the shim that achieves the largest protrusion within the assembly standard range.

Replace cylinder liners

Use the Cylinder liner remover to remove the cylinder liner from the crankcase.

Coat the O-rings with engine oil to prevent twisting and attach them to the new cylinder liner.

A – black o-ring

B – red o-ring

Carefully insert the liner into the bore of the crankcase.

Lightly tap liner on the top with the installer so it rests on its flange on the counterbore in the crankcase. After seating the liner, tap on it several times more to secure the proper seating.

IMPORTANT! After installing the liners on all bores, test the liner fitting for water tightness by applying water under pressure.

NOTE! Check all liners to be sure its protrusion is within assembly standards.

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Group 21 Engine Body

Pistons

Inspecting the piston outside surfaces

Check the combustion surfaces and inside surfaces of the pin bosses. Replace the piston if any defects are found.

Measuring piston diameter

Measure the diameter of each piston perpendicular

(A) to the piston pin and 30 mm [1.18 in.] below the center of the piston pin (B). If the service limit is exceeded, replace the piston. If any pistons have to be replaced, select new pistons so that weight difference in an engine is within assembly standards.

Piston diameter, mm [in.]

Normal value .............

Ø170 [Ø6.69]

Assembly standard ...

169.76–169.80 [6.6835–6.6850]

Service limit ..............

169.66 [6.6795]

Weight difference in an engine, g [oz]

Assembly standard ...

+/- 10g [+/- 0.35 ] max.

Information stamped on top of each piston:

A – Part no.

B – Engine front side mark

C – Piston weight

Measuring piston pin diameter

Using a micrometer, measure the outside diameter of each piston pin. If the measurement exceeds the service limit, replace the pin.

Piston pin outside diameter, mm [in]

Nominal value ...........

Ø70 [2.76]

Assembly standard ...

69.987–70.000 [2.75539–2.75590]

Service limit ..............

69.970 [2.75472]

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Group 21 Engine Body

Measuring piston pin bore diameter

Using calipers or a cylinder gauge, measure the piston pin bore diameter. If the service limit is exceeded replace the piston.

Piston pin bore diameter, mm [in.]

Normal value .............

Ø70 [Ø2.76]

Assembly standard ...

70.002–70.015 [2.75598–2.75649]

Service limit ..............

70.040 [2.75747]

Measuring piston protrusion

Measure the protrusion (height from cylinder head to piston head) of each piston at top dead center. If it is not within standards for piston protrusion measurement, inspect the clearance of the parts.

Set the dial gauge to zero (0) on top of the crankcase and measure the protrusion at four places on top of the piston head. Average the four measurements to determine the protrusion.

Subtract the piston protrusion from the thickness of the cylinder head gasket (as installed) to determine the clearance between the piston top and cylinder head.

Piston protrusion, mm [in]

Assembly standard ...

0.06 60 0.065 [0.0024 to 0.0256]

Cylinder head gasket thickness, mm [in]

Assembly standard ...

1.77 to 1.83 [0.0697 to 0.0720]

Piston top and cylinder head clearance, mm [in]

Assembly standard ...

1.22 to 1.95 [0.0480 to 0.0768]

IMPORTANT! Keep the piston protrusion within assembly standard range to prevent the valves from stamping on the piston and to maintain high engine performance.

Inspecting piston ring grooves

Check the piston ring grooves for wear and damage, replace the piston if necessary. Pay special attention to the Ni-resist insert in the top groove (A) for cracks.

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Group 21 Engine Body

Piston Rings

Measuring piston ring gaps

Place the rings in the new or master cylinder liner.

Measure the gap of each ring. If the service limit is exceeded, replace all the rings on that piston.

NOTE! Use a piston to place the piston ring in the liner by pushing it squarely.

Piston ring gap, Top ring, mm [in]

Standard clearance ...

0.6–0.8 [0.024–0.031]

Service limit ..............

2.0 [0.079]

Piston ring gap, Second ring, mm [in]

Standard clearance ...

0.6–0.8 [0.024–0.031]

Service limit ..............

2.0

[0.079]

Piston ring gap, Oil ring, mm [in]

Standard clearance ...

0.3–0.45 [0.012 –0.018]

Service limit ..............

2.0

[0.079]

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Group 21 Engine Body

Connecting Rods, Bearings, and

Bushings

Measuring connecting rod bushing inside diameter

Measure the inside diameter of each bushing in two directions and on two locations(see picture). If the service limit is exceeded, replace the bushing.

Connection rod bushing inside diameter, mm [in.]

Normal value .............

Ø70 [2.76]

Assembly standard ...

70.020–70.040 [2.75669–2.75747]

Service limit ..............

70.070 [2.75866]

Replacing connecting rod bushings

Use the Connecting rod bushing installer(A) to remove(1) the bushing for replacement as shown.

When installing a new bushing(2), align the oil holes in the bushing and connecting rod.

After installing the bushing, measure it and ream to correct size if necessary. Insert the piston pin, and make sure that the pin rotates freely without rattling.

Connecting rods bend(1) and twist(2)

Measure C and L. If the measurement at C is larger than 0.05 mm [0.0020 in.] per 100 mm [3.9 in.] of L, straighten the rod with a press

NOTE! To inspect for bend and twist, install the cap to the connecting rod, then tighten the cap bolts to the specified torque.

To inspect the rod bend when assembled with the piston, place the piston on a surface plate. Insert a round bar of the same diameter as the crank pin into the big end bore, then measure heights A and B of the bar.

Connecting rod bend C/D, mm [in]

Assembly standard ...

0.05/100 max. [0.0020/3.9]

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Group 21 Engine Body

Inspecting connecting rod large-end bearings

Inspect each bearing shell for flaking, scratching, seizure, pitting, and other defects. If any defects are found, replace the shell.

Measuring connecting rod end play

Install the connecting rod to its crank pin, then tighten its cap bolts to the specified torque. Use feeler gauges to measure the end play. If the end play exceeds the service limit, replace the connecting rod.

Connecting rod end play*, mm [in]

Nominal value ...........

60 x 2 [2.36 x 2]

Standard clearance ...

0.4 to 0.9 [0.016 to 0.035]

Service limit ..............

1.4 [0.055]

* Axial play over crankpin

Weight difference of connecting rods in an engine

When replacing connecting rods, make sure that the weight difference of connecting rods in an engine is within the assembly standards below.

Weight difference of connecting rods, g [oz]

Assembly standard ...

+/- 30 [+/-1.06]

Big end bore diameter

Measure the connecting rod big-end bore diameter in directions 3, 4 and 5 and at front and rear positions 1 and 2, as shown in the drawing. To obtain the roundness value, subtract the smallest measured value from the largest measured value. If the diameter exceeds the servi

Big end bore diameter, mm [in]

Nominal value ...........

Ø131 [5.16]

Assembly standard ...

131.000–131.025 [5.15747–5.15845]

Service limit ..............

131.050 [5.15944]

Service limit* .............

0.100 [0.0039]

*Roundness

100

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Group 21 Engine Body

Serration on connecting rod big-end.

Inspect the serration on connecting rod. big-end by conducting a Magnaflux (magnetic particle) test. If cracking or damage is found, replace the connecting rod.

Connecting rod bearing thickness

Use a ball-point micrometer to measure the center of each bearing shell. If the thickness exceeds the service limit on the upper or lower shell, replace both shells as a set.

Connecting rod bearing thickness STD, mm [in]

Nominal value ...........

3.000 [0.11811]

Assembly standard ...

2.9 72–2.985 [0.11701–0.11752]

Service limit ..............

2.930 [0.11535]

Bearing thickness –0.25 [-0.0098], mm [in]

Nominal value ...........

3.125 [0.12303]

Assembly standard ...

3.097–3.110 [0.12193–0.12244]

Service limit ..............

3.055 [0.12028]

Bearing thickness –0.50 [-0.0197], mm [in]

Nominal value ...........

3.250 [0.12795]

Assembly standard ...

3.222–3.235 [0.12685–0.12736]

Service limit ..............

3.180 [0.12520]

Bearing thickness –0.75 [-0.0295], mm [in]

Nominal value ...........

3.375 [0.13287]

Assembly standard ...

3.347–3.360 [0.13177–0.13228]

Service limit ..............

3.305 [0.13012]

Bearing thickness –1.00 [-0.0394], mm [in]

Nominal value ...........

3.500 [0.13780]

Assembly standard ...

3.472–3.485 [0.13669–0.13720]

Service limit ..............

3.430 [0.13504]

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101

Group 21 Engine Body

Reassembly

Reassembly is done in the reverse order of disassembly.

Pistons and connecting rods

The piston pin is clearance-fitted to the piston. To facilitate pin insertion, heat the piston with a piston heater or in hot water.

Coat the piston pin with engine oil, then insert it in position through the connecting rod.

Install the connecting rod to the piston with the matching marks on the large end on the camshaft side.

Use the Ring pliers to install the snap rings in the grooves of the piston. Make sure that the rings are not fatigued and that they fit in the grooves properly.

NOTE! Position the ends of both snap rings at the bottom of the pin bore.

Piston rings

Use the Piston ring tool to install the piston rings on the piston

IMPORTANT! The top piston ring and second piston ring are marked “RH”, and the oil ring is marked “R” near the gap. Install the rings with these marks upwards. Faulty mounting will cause excessive oil consumption and overheating.

Install the oil ring with its gap positioned at 180° from the coil spring joint.

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Group 21 Engine Body

Preparation before installing pistons

Clean the cylinder liner bore surface and crank pin by wiping with a cloth, then coat it with engine oil.

Pistons for right bank cylinders

Turn the crankshaft in the normal direction until the number (stamped on the damper)(A) of the cylinder to which the piston is to be installed is at the position of approximately SO* before top dead center.

Pistons for left bank cylinders

Turn the crankshaft in the normal direction until the number of the cylinder to which the piston is to be installed is at the position of about 50° after top dead center.

Connecting rod bearing upper shells

Install the upper shell of the bearing in the rod by fitting its locating lug in the lug groove of the rod(A).

Coat the inside surface of the shell with engine oil.

Make sure the oil holes in the rod and bearing are aligned.

Inserting pistons

Put the connecting rod in the cylinder liner, and carefully rest the piston on top of the crankcase.

IMPORTANT! Make sure the arrow mark above the “CAM-arrow”(A) on top of the piston points towards the camshaft(B).

IMPORTANT! When placing the connecting rod in the liner, have another service man to observe the rod through the inspection hole to keep it away from the oil cooling nozzle. Do not rotate the piston.

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103

Group 21 Engine Body

Coat the piston rings with engine oil, then position the ring gaps as shown:

A – Joint of coil spring

B – Gap of top compression ring

C – Gap of second compression ring

D – Gap of oil ring

Hold the compression ring portion of the piston, and carefully insert the piston into the cylinder liner.

NOTE! Do not pinch your fingers between the oil ring and cylinder liner.

Insert the piston slowly not to damage the oil ring.

Coat the rings with engine oil and clamp them, using the Piston installer. Coat the inside surface of the installer with engine oil.

Lightly tap on the piston head with a soft-head mallet to insert the piston into the cylinder liner. If the piston will not go into the liner, move the large end of the connecting rod back and forth through the crankcase inspection hole.

Make sure that the upper shell of the bearing is properly positioned in the big end of the connecting rod.

Installing connecting rod cap bolts

Place the connecting rod bearing on the connecting rod, fitting its lug in the lug groove. Coat the threads of the cap bolts and the inside surface of the lower shells of the connecting rod bearing with engine oil.

Install each cap in position. Hold the upper end of the cap, then tighten the bolt at the lower end first. This will help prevent the cap from dropping into the oil pan. Coat the threads and bearing surfaces of the bolts with engine oil, then tighten the bolts temporarily.

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Group 21 Engine Body

Touch the joint between the cap and rod. Make sure that the cap is fit in place, and tighten the bolts to the specified torque.

IMPORTANT! Make sure that the matching marks on the cap and rod are on the same side and show the same number.

Install the other connecting rod to the crank pin.

Temporarily tighten the cap bolts of the rod installed later, then press it squarely toward the rod already installed by tapping. Move the large end of this rod in the thrust direction. Make sure that the rod has correct end play (insert feeler gauges while tightening).

Tighten the cap bolts to the specified torque.

NOTE! Tighten connecting rod cap bolts according to the angle method. Tighten to 245 N.m (25 kgf.m) [181 lbf.ft], then 60° more.

Use feeler gauges to measure the end play of the connecting rod. Make sure that the end play is equal on both top and bottom sides of the crank pin.

IMPORTANT! Before installing the cylinder head, measure the protrusion of the piston. Make sure that the measurement is correct.

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105

Group 21 Engine Body

Viscous damper and front gears

Disassembly:

1. Viscous damper, damper spacer

2. Plate

3. Oil pump gear

4. Front gear case

5. Water coupling

6. Water pump bearing cover

7. Oil pump bearing cover

8. Thrust plate

9. Idle gear

10. Idler shaft

11. Front plate

Look for:

A. Worn seal lip

B. Roughness in rotation

C. Wear, nicking, chipping, defective splines

D. Wear

E. Wear, nicking, chipping, abnormally worn bushing

F. Clogged oil hole, wear

G. Cracking, defective dowel pin hole

H. Cracking, defective dowel pin hole

I. Worn, lip, nicking, deterioration

J. Cracking, oil leakage

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Group 21 Engine Body

Viscous damper

Attach a sling to the viscous damper. Unscrew the mounting bolts.

Screw the jack-bolts (M14x1.5-40 mm [0.55 x

0.059 - 1.57 in.]) into the threads evenly, then remove the viscous damper.

Weight: Approx. 50 kg [110 lb]

Oil pump and water pump mounting plate

Remove the plate by screwing the two jack-bolts (A)

(885455: M12 x 1.25 mm [0.47 x 0.049 in.]) evenly into the plate.

Oil pump gear

Remove the oil pump gear with the bearing.

Front gear case

Attach a sling to the front gear case.

Unscrew the front gear case mounting bolts. Remove the lifted gear case by sliding it until the gear case comes apart from the positioning dowel pin. Be careful not to damage the oil seal, or bend the pointer by hitting it.

Weight: Approx. 70 kg [154 lb]

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107

Group 21 Engine Body

Oil pump and water pump bearing cover

Unscrew the bearing cover mounting bolts, and remove the bearing cover.

Measure backlash and end play of the idler gear

Measure the backlash and end play of the idler gear to obtain the data for replacement. (Refer to chapter

“Maintenance Standards Table”)

Idler gear

Unscrew the thrust plate mounting bolt and remove the idler gear.

Idler shaft

Do not remove the idler shaft unless it is needed.

When needed, remove it by unscrewing the mounting bolts and screwing the two jack-bolts (A) (Ml0 x 1.25

mm [0.39 x 0.049 in.]) evenly.

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Group 21 Engine Body

Inspection and Repair

Viscous damper inspection

Check the viscous damper for cracks, deformations or cracks in the mirror plate, leakage of silicone oil, discolored or peeling paint due to excessive heat. Replace it with a new one after 8000 to 12000 hours of service, even when no defect is observed.

NOTE! Damper may also be sent to authorized Volvo

Penta workshop for inspection.

Measure backlash

Set up a dial gauge so that it contacts with the pitch circle of the gear to measure the backlash between the gears. If the dial gauge is not available, measure the backlash by inserting feeler gauges between the teeth of the gears. If the backlash exceeds the service limit, replace the worn gear.

Backlash,mm [in]

Standard clearance ...

0.12–0.18 [0.0047–0.0071]

Service limit ..............

0.50 [0.0197]

Oil pump drive

Diameters of bearings and bearing-fitted sections

Rotate the bearing, and replace it if it is not smooth.

Check the fittings of following items and replace them if they show any evidence of excessive wear.

●

Drive shaft and bearing

●

Drive case and bearing

●

Drive shaft and oil seal

Cover bearing bore, mm [in]

Nominal value ...........

Ø110 [4.33]

Assembly standard ...

110.000–110.035 [4.33070–4.33208]

Plate bearing bore, mm [in]

Nominal value ...........

Ø110 [4.33]

Assembly standard ...

109.987–110.022 [4.33019–4.33157]

Bearing outside diameter, mm [in]

Nominal value ...........

Ø110 [4.33]

Assembly standard ...

109.985–110.000 [4.33012–4.33071]

Bearing inside diameter, mm [in]

Nominal value ...........

Ø50 [1.97]

Assembly standard ...

49.988–50.000 [1.96803–1.96850]

Gear shaft bearing bore, mm [in]

Nominal value ...........

Ø50 [1.97]

Assembly standard ...

49.993–50.013 [1.96822–1.96901]

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109

Group 21 Engine Body

Idler gears, bushings, and shafts

Measuring idler gear bushing inside diameter and idler gear shaft diameter. If the service limit is exceeded, replace the bushing or shaft (whichever is worn).

Idler gear bushing inside diameter, mm [in]

Nominal value ...........

Ø50 [1.97]

Assembly standard ...

50.000–50.025 [1.96850–1.96948]

Service limit ..............

50.060 [1.97086]

Idler gear shaft diameter, mm [in]

Nominal value ...........

Ø50 [1.97]

Assembly standard ...

49.950–49.975 [1.96653–1.96752]

Service limit ..............

49.900 [1.96456]

Idler gear end play

Measure the end play with feeler gauges or dial gauge. If the idler gear end play exceeds the service limit, replace the thrust plate.

Idler gear end play, mm [in]

Standard clearance ...

0.2–0.4 [0.008–0.016]

Service limit ..............

0.6 [0.024]

Replace idler bushing

Use the Idler bushing puller to remove the bushing.

Install a new bushing to the gear by pressing it until the end face of the bushing is 1 mm [0.04

in.] (A) recessed from that of the gear boss.

After installing the bushing, make sure that its inside diameter is within the assembly standard. If not, ream the bushing to the correct diameter (0.4

Ra).

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Group 21 Engine Body

Reassembly

Reassembly is done in the reverse order of disassembly.

Installing the front plate

Apply sealant to the front plate mounting surface of the crankcase, then place the packing in position. Apply the same sealant to the packing, then install the front plate.

Replace the dowel pins if worn, or if the front plate has been replaced.

Make sure that the lower end of the front plate is flush with the bottom of the crankcase. Cut off the excess of the packing neatly along the edge of the plate.

Installing the idler shaft

Insert the idler shaft using the guide bolts.

Tighten the shaft mounting bolts to the specified torque.

Installing the idler gear

Insert the idler gear into the shaft, and install the thrust plate.

Install the thrust plate, then tighten the mounting bolts to the specified torque.

Installing the oil pump and water pump drive bearing cover

Insert the bearing cover into the front plate, then tighten the cover mounting bolts to the specified torque

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111

Group 21 Engine Body

Installing the front gear case and pointer

Apply a sealant to the front gear case packing mounting surface, then mount the packing. Apply sealant to the packing, then install the front gear case.

Mount the water coupling of the front plate and the gear case to the crankcase. Apply grease to the O-rings and O-ring grooves. Do not damage the O-rings when installing the gear case.

Replace the dowel pins if worn, or if the front cover has been replaced.

Tighten the front cover mounting bolts evenly to the specified torque.

Make sure that the lower end of the front cover is flush with the bottom of the front plate. Cut off the excess packing along the edge of the cover.

Install the oil seal(2) to the front gear case(1).

Apply engine oil to the lip of the oil seal.

Insert the oil seal to the slinger(3) to a distance of

15.7 – 16.3 mm [0.588 – 0.612 in.](A) using the special tool (Front seal installer assembly).

When the Pointer is out of place

To determine the top dead center on the compression stroke of No. 1.6 cylinder, for example, bring the mark on the flywheel to where it is at an equal distance between the marks stamped on the timing gear case.

Oil pump gear and mounting plate

Insert the oil pump gear.

Install the oil and water pump mounting plate, then tighten the bolts to the specified torque.

Installing the viscous damper

Tighten the damper mounting bolts to the specified torque.

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Oil pan and Oil strainer

Group 21 Engine Body

Disassembly:

Oil pipe

Oil pan

Oil pan packing

Oil strainer

Look for:

A. Clogs

B. Replace

C. Cracks

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113

Group 21 Engine Body

Reassembly

Reassembly is done in the reverse order of disassembly.

Fit the O-ring to the oil passage of the oil pan mounting surface.

Fit the packing to the oil pan by applying sealant to the 4 separated sections.

114

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Group 21 Engine Body

Flywheel, Timing gears, and Camshaft

Disassembly:

1. Flywheel

2. Idler shaft thrust collar

3. Timing gear case, oil seal

4. Injection pump drive

5. Idler gear

6. Idler shaft

7. Camshaft gear

8. Thrust plate

9. Camshaft

10. Rear plate

11. Nozzle plate

12. Cover

Look for:

A. Clogged oil hole

B. Damage, wear

C. Rough bearing rotation, damaged seal

D. Flaking or wear

E. Clogged oil, wear

F. Cracks, damaged dowel holes

G. Wear, damaged or deteriorated lip

H. Damaged threads

I. Cracks, defective dowel holes, worn ring gear

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115

Group 21 Engine Body

Remove the flywheel

Attach a sling to the flywheel.

Unscrew the mounting bolts.

Screw the two jack-bolts into the holes in the flywheel evenly, then remove the flywheel.

Weight: Approx. 138 kg [304 lb]

IMPORTANT! When you remove the flywheel, do not drop it or bump it against a hard object.

IMPORTANT! The ring gear is bolt mounted to the flywheel. Do not remove the gear except when it has to be replaced.

Remove the idler shaft collar

Unscrew the cover mounting bolts, then remove the cover.

Unscrew the idler shaft thrust collar mounting nuts. Mark the collar position.

Screw bolts (M6 x 1.0 mm [0.24 x 0.039 in.]) through the thrust collar removing bolt holes and pull the thrust collar from the gear case.

NOTE! Place marks to identify the right and left collars to ensure proper backlash and end play in reinstallation.

Remove the timing gear case

Attach slings to the timing gear case.

Unscrew the timing gear case mounting bolts.

Remove the timing gear case by lifting it up until it separates from the dowel pin. Do not damage the oil seal.

Weight: Approx. 150 kg [330 lb]

Measure backlash and end play

Measure the backlash and end play of each gear to obtain the data for parts replacement.

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Group 21 Engine Body

Fuel pump drive gears (left and right)

Unscrew the injection pump drive case mounting bolts, then remove the pump drive. Do not damage the gear teeth.

NOTE! Remove the No. 12 cylinder cam cover before removing the pump drive case of the left side.

Remove idler gears

Remove the slinger of the crankshaft.

NOTE! When the slinger is removed, install a new slinger during reassembly.

Remove the idler gears (left and right).

Remove the idler shaft

Do not remove the idler shaft unless you need to repair it. To remove, install the sliding hammer to the idler shaft removing screw hole (M22 x 1.5 mm [0.87

x 0.059 in.]).

Remove camshaft gears

Unscrew the camshaft gear mounting bolts, then remove the camshaft gear.

Remove camshafts

Unscrew the thrust plate mounting bolts, then pull out the camshaft from the crankcase.

Weight: Approx. 45 kg [l00 lb]

IMPORTANT! When pulling out the camshaft, support it with a bar inserted through the camshaft inspection hole of the crankcase to prevent damage to the cam surfaces and bushings.

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117

Group 21 Engine Body

Inspection and Repair

Flywheel face and radial runouts

Measure the runouts of the flywheel installed on the crankshaft. If the runouts exceed the assembly standard, check for loose bolts or obstacles lodged between the mounting faces of the flywheel and crankshaft.

Flywheel face runout, mm [in]

Assembly standard ...

0.336 [0.0132] max.

Flywheel radial runout, mm [in]

Assembly standard ...

0.13 [0.0051] max.

Injection pump drive and bearing

Measure inside and outside diameters of bearingfitted sections of injection pump drive.

Check bearings, drive shaft, and oil seal. Replace if not running smoothly or if otherwise defective.

Check the fit of the drive shaft in the bearing and the fit of the bearing in the drive case. Replace excessively worn parts.

Bearing outside diameter, mm [in]

Nominal value ...........

Ø90 [3.54]

Assembly standard ...

89.985–90.000 [3.54272]

Bearing outside diameter, mm [in]

Nominal value ...........

Ø100 [3.94]

Assembly standard ...

99.985–100.000 [3.93642–3.93701]

Bearing inside diameter, mm [in]

Nominal value ...........

Ø45 [1.77]

Assembly standard ...

44.988–45.000 [1.77118–1.77165]

Bearing inside diameter, mm [in]

Nominal value ...........

Ø50 [1.97]

Assembly standard ...

9.988–50.000 [1.96803–1.96850]

Drive shaft bearing diameter, mm [in]

Nominal value ...........

Ø45 [1.77]

Assembly standard ...

45.002–45.013 [1.77173–1.77216]

Drive shaft bearing diameter, mm [in]

Nominal value ...........

Ø50 [1.97]

Assembly standard ...

50.002–50.013 [1.96858–1.96901]

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Group 21 Engine Body

Timing gear backlash

To measure the backlash between the gears, set up a dial gauge so that it contacts the pitch circle of the gear to measure. If a dial gauge is not available, measure the backlash by inserting feeler gauges between the gear teeth. If the backlash exceeds the service limit, replace the worn gears.

Timing gear backlash, mm [in]

Standard clearance ...

0.12–0.18 [0.0047–0.0071]

Repair limit ................

0.30 [0.0118]

Service limit ..............

0.50 [0.0197]

Idler gears, bushings, and shafts

Measuring idler gear bushing inside diameter and idler gear shaft diameter. If the service limit is exceeded, replace the bushing or shaft (whichever is worn).

Idler gear bushing inside diameter, mm [in]

Nominal value ...........

Ø65 [2.56]

Assembly standard ...

65.000–65.030 [2.55906–2.56024]

Service limit ..............

65 [2.56142]

Idler gear shaft diameter, mm [in]

Nominal value ...........

Ø65 [2.56]

Assembly standard ...

64.951–64.970 [2.55713–2.55787]

Service limit ..............

64.900 [2.55512]

Idler gear end play

Measure the end play with feeler gauges or dial gauge. If the idler gear end play exceeds the service limit, replace the thrust plate.

Idler gear end play, mm [in]

Standard clearance ...

0.3–0.6 [0.0118–0.0236]

Service limit ..............

1.0 [0.0397]

Replace idler bushing

Use the Idler bushing puller to remove the bushing.

Install a new bushing to the gear by pressing it until the end face of the bushing is 1 mm [0.04

in.] (A) recessed from that of the gear boss.

After installing the bushing, make sure that its inside diameter is within the assembly standard. If not, ream the bushing to the correct diameter (0.4

Ra).

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Group 21 Engine Body

Camshafts and Camshaft Bushings

Measure cam lift

Use a micrometer to measure the diameters of “A” and “B” on each cam to determine the reduction in cam lift. If the cam lift is less than the service limit, replace the camshaft.

Cam lift (A-B), mm [in]

Assembly standard ...

9.197–9.297 [0.36209–0.36602]

Service limit ..............

8.45 [0.3327]

Measuring camshaft deflection

If the deflection exceeds the repair limit, straighten the camshaft with a press, or replace it with a new one.

IMPORTANT! Set up a dial gauge on the camshaft, then turn the camshaft. Take one-half of the gauge indication as the deflection.

Camshaft deflection, mm [in]

Assembly standard ...

0.05 [0.0020] max

Repair limit ................

0.08 [0.0031]

Measuring camshaft journal diameters

Use a micrometer to measure each camshaft journal in two directions at right angles to each other. If the diameter exceeds the service limit, replace the camshaft.

Camshaft journal diameter, mm [in]

Nominal value ...........

Ø84 [3.31]

Assembly standard ...

83.92–83.94 [3.3039–3.3047]

Service standard .......

83.87 [3.3020]

Measuring camshaft bushing inside diameter

Use a cylinder gauge to measure the inside diameter of the camshaft bushings fitted to the crankcase. If the inside diameter exceeds the service limit, replace the bushings.

Camshaft bushing inside diameter, mm [in]

Nominal value ...........

Ø84 [3.31]

Assembly standard ...

84.000–84.035 [3.30708 –3.30846]

Service limit ..............

84.10 [3.3110]

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Group 21 Engine Body

Measuring camshaft end play

Use a dial gauge to measure the end play of the camshaft to which the camshaft gear is installed. If the end play exceeds the service limit, replace the thrust plate.

Camshaft end play, mm [in]

Standard clearance ...

0.10–0.25 [0.0039–0.0098]

Service limit ..............

0.40 [0.0157]

Replacing camshaft bushings

Install the bushings in the crankcase, then secure them in place with the set screws. Before tightening the screws, be sure that the screw holes in the bushings and crankcase are aligned and that the oil holes in the bushings are aligned with those leading to the oil gallery in the crankcase. Use a wide bushing as the bearing for the rear section, and insert it in the correct attitude.

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121

Group 21 Engine Body

Reassembly

Install the rear plate

Apply sealant (HERDITE) to the rear plate mounting surface of the crankcase, then place the packing in position. Apply the same sealant to the packing, then install the rear plate.

Replace the dowel pins if worn, or if the rear plate has been replaced.

Make sure that the lower end of the rear plate is flush with the bottom of the crankcase. Cut off the excess of the packing neatly along the edge of the plate.

Crank the engine

Install the bolts (M22 x 1.5 mm [0.87 x 0.059 in.]) to the viscous damper mounting holes.

Using these bolts, turn the crankshaft with a bar to bring the No. 1 cylinder piston to the top dead center.

Install idler gear shafts

Fit the O-ring to the idler shaft. Apply grease to the Oring to insert the idler shaft into the crankcase. At this time. In this step, make sure the “TOP” mark on the shaft is located at the top (oil passage in vertical direction).

Install camshafts (left and right)

Insert the camshaft into the cylinder block, then install the thrust plate.

Tighten the thrust plate mounting bolts to the specified torque.

Check and make sure that the camshaft turns smoothly.

NOTE! Do not mix the two different camshafts when you reassemble the engine.

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Group 21 Engine Body

Installing camshaft gears

Install the camshaft gears to meet the dowel pin.

Tighten the camshaft gear mounting bolts to the specified torque.

After installing the camshaft gear, check that the gear rotates smoothly.

Installing idler gears

Install the idler gear by aligning its matching mark with that on the crankshaft gear and camshaft gear. Tighten the idler gear mounting bolts to the specified torque.

Insert the slinger to the crankshaft.

Confirm that the matching marks of the timing gears are as the drawing shown on the right.

Installing the injection pump drive

Install the injection pump gear to the drive shaft, then tighten it to the specified torque. 392 N.m

(40 kgf.m) [289 lbf.ft]

Fit the O-ring to the installation surface of the drive case. Apply a thin coat of ThreeBond 1212 on the flange surface.

Install the injection pump drive to the rear plate by aligning its matching mark to that of the idler gear.

Tighten the drive case mounting bolts to the specified torque. 108 N.m (11 kgf.m) [80 lbf.ft]

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123

Group 21 Engine Body

Inspect and adjust timing gears

After installing the timing gears, be sure to inspect and adjust them as follows.

Inspect timing gear backlash and end play

After installing the timing gears, inspect the backlash between the gears in mesh, and the end play of each gear.

Inspect Valve Timing

It is not necessary to inspect the valve timing, provided that all match marks on the timing gears are aligned. Inspect the timing for verification as explained below.

Valve timing diagrams

A. Standard

B. with 2 mm [0.08 in.] valve clearance added

Inlet valve opens

Inlet valve closes

Exhaust valve opens

Exhaust valve closes

Use a feeler gauge 2 mm [0.08 in.] thick, add 2 mm

[0.08 in.] clearance to the inlet and exhaust valves of the No. 1 cylinder. Then insert a feeler gauge 0.05

mm [0.020 in.] thick between the bridge cap and rocker. Slowly turn the crankshaft to find the position where the feeler gauge is firmly gripped (the valve starts opening) and the position where the gauge is released (the valve starts closing). Check that these positions coincide with the angular positions shown in the valve timing diagram B.

Install the timing gear case

Apply sealant to gear case surface. Mount the packing. Apply sealant to packing.

Replace dowel pins if worn, or if gear case has been replaced.

Tighten gear case mounting bolts evenly to the specified torque. Cut off excess packing along the edge of the crankcase.

Apply engine oil to the oil seal lip. Insert seal (2) into timing gear case(1).

Fit oil seal to slinger (3) to a distance of 15.7 –

16.3 mm [0.588 – 0.612 in.](A) using the Rear seal installer.

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Group 21 Engine Body

Install the idler shaft thrust collars

Apply grease to the thrust collars, and insert the collars in the timing gear case.

In this step, make sure the “TOP” mark is located at the top and that the right and left collars are installed in their original positions.

Tighten the thrust collar mounting nuts to the specified torque.

Install the cover, and tighten the mounting bolts to the specified torque.

Installing the flywheel

Install the flywheel. Check that all dowel pins enter their holes.

Coat the threads and the bolt bearing surface of the flywheel mounting bolts with engine oil. Tighten the bolts to the specified torque. Inspect the face and radial runouts of the flywheel.

Installing the pickup

Rotate the engine using the turning gear until a tooth of the ring gear is positioned at the center of the pickup mounting hole.

Screw the pickup gently into the hole. When the tip of the pickup contacts the tooth surface of the ring gear, loosen the pickup 1½ turn, then tighten the lock nut to secure the pickup in place.

NOTE! Installing the pickup too close to the teeth of the ring gear may result in too strong a signal.

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125

Group 21 Engine Body

Crankcase, Crankshaft and Main bearings

Disassembly:

1. Main bearing cap bolt

2. Side bolt

3. Main bearing cap

4. Main bearing (lower)

5. Thrust bearing

6. Crankshaft

7. Main bearing (upper)

8. Thrust bearing

9. Slinger (front)

10. Crankshaft gear (front)

11. Slinger (rear)

12. Crankshaft gear (rear)

13. Check valve

14. Piston cooling nozzle

15. Crankcase

Look for:

A. Scale damage, cracks, clogged oil holes

B. Wear scratching pitting, scoring

C. Stripped threads

D. Wear

E. Clogged oil hole

F. Check valve movement

G. Scoring, pitting, flaking, chipping, cracks, corrosion

H. Wear, chipping, abnormal tooth contact

I. Wear

J. Cracking

K. Stripped threads

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Group 21 Engine Body

Turning the crankcase upside down

Use such lifting tool as a chain block and shackles to play the crankcase on its side. Then add slings to the crankcase, and turn it upside down.

Weight: Approx. 1800 kg [3968 lb]

Removing the main bearing caps

Unscrew the cap bolts and side bolts. Remove the main bearing cap using cap removers (injector remover) or a chain block (use 2 eye bolts,

M27 x 1.5 mm [1.06 x 0.059 in.]).

Remove the thrust bearings from the No. 9 bearing cap. Do not damage the thrust bearings.

Removing the crankshaft

Remove the front upper halves of the thrust bearings by rotating them slowly.

Carefully lift the crankshaft off the crankcase, keeping it horizontal.

Weight: Approx. 450 kg [992 lb]

Remove the rear upper halves of the thrust bearings on the crankcase

Removing the piston cooling nozzles

Do not remove the nozzles unless such defects as clogging are observed.

NOTE! Tighten the piston cooling nozzle to the specified torque when reassembling.

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127

Group 21 Engine Body

Inspection and Repair

Crankshaft

Crank pin and crank journal diameters

Using a micrometer, measure the crank pin(A.) and crank journal (B.) diameters. If the repair limit is exceeded, grind them to the next lower size:

-0.25 mm [-0.0098 in.],-0.50 mm [-0.0197 in.],

-0.75 mm [-0.0295 in.], or -1.00 mm [-0.0394 in.].

NOTE! If the –1.00 mm [0.0394 in.] undersize journals and crank pins exceed the repair limit, replace the crankshaft.

Measure the crank pins and journals to determine the roundness and cylindricity

Crank pin diameter (A), mm [in]

Nominal value ...........

Ø125 [4.92]

Assembly standard ...

-0.050– -0.070 [-0.00197– -0.00276]

Repair limit ................

-0.110 [-0.00433]

Crank journal diameter (A), mm [in]

Nominal value ...........

Ø170 [6.69]

Assembly standard ...

-0.060– -0.080 [-0.00236– -0.00315]

Repair limit ................

-0.110 [-0.00433]

Pin & Journal roundness, mm [in]

Assembly standard ...

Dia. diff. 0.01 [0.0004] max.

Repair limit ................

0.03 [0.0012]

Pin & Journal cylindricity, mm [in]

Assembly standard ...

Dia. Diff. 0.02 [0.0008] max.

Repair limit ................

0.03 [0.0012]

Pin fillet radius mm [in]

Nominal value ...........

7 [0.28]

Assembly standard ...

7.0 0 / -0.2

[0.276 0 / -0.008

]

Journal fillet radius journal, mm [in]

Nominal value ...........

8.5 [0.33]

Assembly standard ...

8.5

0 / -0.2

[0.335

0 / -0.008

]

Pin & Journal hardness

Assembly standard ...

Hv>590

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Group 21 Engine Body

Grinding dim. for undersize crankshaft

Crankpin diam. undersize 0.25 [0.0098], mm [in]

Finishing dimension ..

124.68–124.70 [4.9087–4.9094]

Roundness ................

Dia. Diff. 0.01 [0.0004] max

Cylindricity ................

Dia. Diff.e 0.02 [0.0008] max

Crankpin diam. undersize 0.50 [0.0197], mm [in]

Finishing dimension ..

124.43–124.45 [ 4.8988–4.8996]

Roundness ................

Dia. Diff. 0.01 [0.0004] max

Cylindricity ................

Dia. Diff. 0.02 [0.0008] max

Crankpin diam. undersize 0.75 [0.0295], mm [in]

Finishing dimension ..

124.18–124.20 [4.8890–4.8898]

Roundness ................

Dia. Diff. 0.01 [0.0004] max

Cylindricity ................

Dia. Diff. 0.02 [0.0008] max

Crankpin diam. undersize 1.00 [0.0394], mm [in]

Finishing dimension ..

123.93–123.95 [4.8791–4.8799]

Roundness ................

Dia. Diff. 0.01 [0.0004] max

Cylindricity ................

Dia. Diff. 0.02 [0.0008] max

Journal diam. undersize 0.25 [0.0098], mm [in]

Finishing dimension ..

169.67–169.69 [6.6799–6.6807]

Roundness ................

Dia. Diff. 0.01 [0.0004] max

Cylindricity ................

Dia. Diff. 0.02 [0.0008] max

Journal diam. undersize 0.50 [0.0197], mm [in]

Finishing dimension ..

169.42–169.44 [6.6701–6.6709]

Roundness ................

Dia. Diff. 0.01 [0.0004] max

Cylindricity ................

Dia. Diff. 0.02 [0.0008] max

Journal diam. undersize 0.75 [0.0295], mm [in]

Finishing dimension ..

169.17–69.19 [6.6602–6.6610]

Roundness ................

Dia. Diff. 0.01 [0.0004] max

Cylindricity ................

Dia. Diff. 0.02 [0.0008] max

Journal diam. undersize 1.00 [0.0394], mm [in]

Finishing dimension ..

168.92–168.94 [6.6504–6.6512]

Roundness ................

Dia. Diff. 0.01 [0.0004] max

Cylindricity ................

Dia. Diff. 0.02 [0.0008] max

Grinding the crankshaft

Refinish the crankshaft according to the dimensions of the undersize main bearing and connecting rod bearing.

When grinding the crank pins and journals, be sure to produce the same fillet radius as the original. They should have a hardness of 590 (Vickers Hardness

Number). If necessary, re-harden the crank pins and journals, and inspect them for cracks by conducting a

Magnaflux (magnetic particle) test. After grinding, finish the journals and crank pins to 0.2 Ra.

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129

Group 21 Engine Body

Measuring crankshaft end play

Install the thrust bearings in position, then secure the bearing cap. Under this condition, measure the end play. If the end play exceeds the standard clearance, replace the thrust bearings.

If the end play still exceeds the repair limit even after the new thrust bearings have been installed, replace the bearings with the next oversize bearings. There are three sizes for the thrust bearings:

+ 0.25 mm [+0.0098 in]

+ 0.50 mm [+0.0197 in]

+ 0.75 mm [+0.0295 in]

NOTE! Generally the rear journal is likely to wear more rapidly than the front journal. This means that replacement of the rear thrust bearings will generally be sufficient.

Thrust bearing journal length (A), mm [in]

Nominal value ...........

67.000–67.030 [2.6400–2.64118]

Crankshaft end play, mm [in]

Standard Clearance ..

0.20–-0.40 [0.0079–0.0157]

Service limit ..............

0.50 [0.0197]

Crankshaft Journal grinding dimensions

(oversize thrust bearings)

+0.25 [0.0098] , mm [in]

Oversizes for Journal or Thrust bearings 67.25 [2.6476]

Oversizes for Journal and Thrust bearings 67.50 [2.6575]

Tolerance ..................

+0.03 / 0 [+0.0012 / 0]

+0.50 [0.0197] , mm [in]

Oversizes for Journal or Thrust bearings 67.50 [2.6575]

Oversizes for Journal and Thrust bearings 68.00 [2.6772]

Tolerance ..................

+0.03 / 0 [+0.0012 / 0]

+0.75 [0.0295] , mm [in]

Oversizes for Journal or Thrust bearings 67.75 [2.6673]

Oversizes for Journal and Thrust bearings 68.50 [2.6968]

Tolerance ..................

+0.03 / 0 [+0.0012 / 0]

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Group 21 Engine Body

Measuring crankshaft deflection

Support the crankshaft on its journals in V-blocks, then measure the deflection at the center journal with a dial gauge. Depending on the amount of deflection, repair the crankshaft by grinding or straightening with a press. If the deflection exceeds the repair limit, replace the crankshaft.

Crankshaft deflection, mm [in]

Assembly standard ...

0.04 [0.0016] max.

Repair limit ................

0.10 [0.0039]

Replace the oil seal slinger

Replace the slinger if it is pitted, scratched, or distorted enough to cause oil leaks.

Remove the Slinger

Use a gear puller to remove the slinger from the crankshaft.

Install the Slinger

Identify the front slinger and the rear slinger, and pay attention to their attitudes

A.Front

B.Rear

1. Front cover

2. Timing gear case

3. Oil seal

4. Slinger

Use a slinger installer to install the heated (above

110 °C [230 °F]) slinger to the crankshaft until it contacts the gear.

IMPORTANT! If the slinger has stopped before it touches the gear, tap the center or shoulder of the installer with a copper hammer.

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131

Group 21 Engine Body

Replace the crankshaft gear

Remove the Gear

Use a gear puller to remove the gear from the crankshaft.

NOTE! Do not remove the gear by hitting it with a hammer.

Install the Gear

Before installing the crankshaft gear, measure the inside diameter of the crankshaft gear. to be sure that the fit is within the specified value.

Front side ..................

0.106–0.171 mm [0.00417–0.00673 in]

Rear side ...................

0.274–0.358 mm [0.01079–0.01409 in]

Heat the gear to the range 180 to 200 °C

[356 to 392 °F. (Do not heat the gear above 200

°C [392 °F].)

Drive the rear crankshaft gear onto the crankshaft by tapping the end face of the gear lightly with a copper hammer. Be sure the crankshaft dowel pin enters the notch in the gear.

IMPORTANT! Install the gear to the crankshaft until it contacts the collar.

IMPORTANT! Do not mistake the direction of gear installation

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Group 21 Engine Body

Main Bearing

Bearing surfaces

Inspect each bearing shell for abnormal contact such as scratching, corrosion, flaking, etc. Also check for signs of poor seating in the bore of the crankcase or bearing cap.

Bearing thickness

Use a ball point micrometer to measure the center of each hearing shell. If the service limit is exceeded on any of the shells, replace the upper and lower shells as a set.

Main bearing thickness (center) STD, mm [in]

Nominal value ...........

4.500

Assembly standard ...

4.467–4.480

Service limit ..............

4.425

[0.17717]

[0.17587–0.17638]

[0.17421]

Main bearing thickness (center) –0.25 [0.0098], mm [in]

Nominal value ...........

4.625

Assembly standard ...

4.592–4.605

Service limit ..............

4.550

[0.18209]

[0.18079–0.18130]

[0.17913]

Main bearing thickness (center) –0.50 [0.0197], mm [in]

Nominal value ...........

4.750

Assembly standard ...

4.717–4.730

Service limit ..............

4.675

[0.18701]

[0.18571–0.18622]

[0.18405]

Main bearing thickness (center) –0.75 [0.0295], mm [in]

Nominal value ...........

4.875

Assembly standard ...

4.842–4.855

Service limit ..............

4.800

[0.19193]

[0.19063–0.19114]

[0.18898]

Main bearing thickness (center) –1.00 [0.0394], mm [in]

Nominal value ...........

5.000

Assembly standard ...

4.967–4.980

Service limit ..............

4.925

[0.19685]

[0.19555–0.19606]

[0.19390]

NOTE! Four undersizes are available for the main bearings; -0.25 mm [-0.0098 in], -0.50 mm [-0.0197

in], -0.75 mm [-0.0295 in] and –1.00 mm [-0.0394].

Replace main bearings.

If the thickness exceeds the service limit, either replace the main bearings as above, or refinish the crankshaft and use undersize bearings.

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133

Group 21 Engine Body

Crankcase

Flatness of gasket surface

Measure flatness with a straight edge and feeler gauges. If the warpage exceeds the assembly standard, reface the gasketed surfaces with a surface grinder.

Crankcase gasket surface flatness, mm [in]

Assembly standard ...

0.1 [0.004] max

Repair limit ................

0.2 [0.008]

NOTE! Do not grind the crankcase more than necessary to remove warpage. Excessive grinding can cause the piston protrusion to exceed assembly standard.

Main bearing bore diameter

Secure the end bearing cap to the specified torque, and measure the bore diameter in the three directions.

Main bearing bore diameter, mm [in]

Nominal value ...........

Ø179 [7.05]

Assembly standard ...

179.000–179.025 [7.04723–7.04821]

Service Limit .............

179.045 [7.04900]

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Group 21 Engine Body

Reassembly

Reassembly is done in the reverse order of disassembly.

Main bearing

Install each upper shell of the main bearing in the crankcase by fitting its locating lug in the lug groove. The oil holes in the bearings and crankcase Will be aligned when the bearings are installed in this way.

Lightly coat the inside surface of the shells with engine oil.

Installing thrust bearings

Install the thrust bearings to the No. 9 bearing seat of the crankcase, with the oil groove side of the bearings facing out.

After installing the crankshaft, install the inner thrust hearing with the oil groove facing inside the crankcase.

Crankshaft

Wash the crankshaft with cleaning solvent, and dry it by air blow.

NOTE! After washing the crankshaft, make sure that the oil holes are clean and not clogged.

Hold the crankshaft horizontally with a hoist, then carefully put it on the crankcase.

Lightly coat the journals with engine oil.

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135

Group 21 Engine Body

Main bearings

Main bearing caps

Fit the lower shell of the bearing to each bearing cap.

Install the thrust bearings to the No. 7 bearing cap, with the oil groove side of the bearing facing out.

From the front side of the crankcase, hearings

No. 1 to No. 7 are stamped on the caps. Install the caps with these numbers and “FRONT” mark on the front of the crankcase.

Coat the threads of the metal cap bolts with engine oil, then temporarily tighten the bolts.

Use a softhead mallet to drive in the metal caps evenly.

Bearing cap bolts

Temporarily tighten the bearing cap coated with engine oil. Tighten the four bolts progressively and evenly to the specified torque.

Tighten the left and right side bolts progressively and evenly to the specified torque.

Make sure that the crankshaft rotates smoothly.

Crankshaft end play

Tighten No. 1 through No. 6 bearing cap bolts and side bolts to the specified torque, with the

No. 7 cap bolt temporarily tightened, then measure the end play.

After tightening the No. 7 cap bolts, make sure that the end play is correct.

Confirm that all cap bolts and side bolts are tightened to the specified torque.

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Group 22 Lubrication System

Group 22 Lubrication system

Oil Pump and Safety Valve

Disassembly

1.Oil pump cover

2.Safety valve assy

3.Bushing

4.Drive gear

5.Driven gear

6.Driven gear

7.Bushing

8.Oil pump case

Look for:

A. Fatigue, break, wear

B. Cracks, other damage

C. Worn, broken spline

D. Damage, wear

E. Replace packing

F. Damage wear

G. Damage, wear

H. Cracks, other damage

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137

Group 22 Lubrication System

Inspection

Measuring gear backlash

If the backlash exceeds the service limit, replace the gears.

Drive gear and driven gear backlash, mm [in.]

Standard Clearance ..

0.10–0.20 [0.039–0.0079]

Service Limit .............

0.4 [0.0157]

Measuring gear clearance

Use feeler gauges to measure the clearance. If the clearance exceeds the service limit, replace the gears or case, whichever is badly worn.

Drive gear and driven gear clearance, mm [in.]

Nominal Value ...........

Ø60 [2.36]

Standard Clearance ..

0.100–0.148 [0.00394–0.00583]

Service Limit

Tip clearance: ...........

0.35 [0.0138]

Measuring pump gear end clearance

Use a dial gauge to measure thr clearance. If the clearance exceeds the service limit, replace the gears or case, whichever is badly worn.

Pump gear end clearance, mm [in.]

Nominal Value ...........

72.5 [2.854]

Standard Clearance ..

0.040–0.116 [0.00157–0.00457]

Service Limit .............

0.21 [0.0083]

NOTE! Remove the cover mounting packing (0.04

mm [0.0016 in.] thick) when measuring.

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Group 22 Lubrication System

Measuring shaft and bushing diameters

Check the gear teeth. Replace gears if they are defective.

Measure the gear shafts and bushings using a dial gauge. If the diameter exceeds the service limit, replace the parts.

Drive shaft diameter, mm [in.]

Nominal Value ...........

Ø30 [1.18]

Assembly Standard ...

29.887–29.900 [1.17665–1.17717]

Service Limit .............

29.840 [1.17480]

Driven shaft diameter, mm [in.]

Nominal Value ...........

Ø30 [1.18]

Assembly Standard ...

29.947–29.960[1.17901–1.17953]

Service Limit .............

29.900 [1.17716]

Bushing inside diameter, mm [in.]

Nominal Value ...........

Ø30.1 [1.19]

Assembly Standard ...

30.100–30.121 [1.18504–1.18586]

Service Limit .............

30.155 [1.18720]

Replacing oil pump bushings

Remove the oil pump bushing as needed. If the oil pump busing insertion is too tight to remove it, replace it with the case or cover assembly.

When you install the pump cover bushing, place the bushing joint positions as shown in the right drawing. (Do not align with the lubrication oil groove.)

Using the oil pump bushing installer A, insert the bushing to the position shown in the right drawing.

After you press a new bushing into position, finish its inside diameter to Ø30H7 +0.021/0 mm [1.18

+0.0008/0 in.] 0.8 R a

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139

Group 22 Lubrication System

Inspecting the safety valve

Check the valve spring of the oil pump safety valve for fatigue. If excessive fatigue, wear or break is found, replace the valve spring.

Measure the valve opening pressure. If the pressure is higher or lower than the assembly standard, increase or decrease the thickness of shim inserted between the spring and spring cap nut.

For the thickness of a shim, 1 mm [0.04 in.] corresponds to a change in pressure of 0.10 MPa (1 kgf/cm

) [14.2 psi].

Safety valve opening press., MPa (kgf/cm 2 ) [psi]

Assembly Standard ...

1.27±0.13 (13±1.3 ) [185±18.5]

Safety valve spring set length/set force, mm/N

(in/kgf) [lbf]

Assembly Standard ...

65.8/359 (2.59/36.6) [80.7]

Service Limit .............

65.8/314 (2.59/32.0) [70.5]

Reassembly

Reassembly sequence

1 3

8 7 4 5 6 2

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Group 22 Lubrication System

Oil Filter, Filter Alarm, Relief Valve,

Left Side Cooler and Thermostat

Disassembly

1. Full flow oil filter element

2. Filter bracket assy

3. Adaptor A assy

4. Adaptor B assy

5. Oil cooler element

6. Relief valve assy

7. Connector

8. Oil thermostat

9. Thermostat seal

10. Body assy

11. Cover

12. Cover

13. Drain cock

Look for:

Holes clogging, cracks

Replace packing

Replace O-rings

Fatigue, break, wear of spring

Deterioration, wear, cracks

Wear, cracks

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141

Group 22 Lubrication System

Inspection

Inspecting the oil filter

When you replace the paper element, sample about

500 cm 3 [30.5 in 3 .] of oil and check for metal particles.

If any metal particles are found, unfold the pleats of element and check the color and shape of the particles trapped in the pleats to identify the cause.

Measuring relief valve pressure

Remove the taper plug (PT US) on the upper side of the filter bracket, and attach a pressure gauge.

Warrn up the engine until the oil temperature rises to 70–90°C [158–194°F].

Measure oil pressure at idling speed and maximum speed.

If the measured oil pressure is lower than the specified value, adjust the valve opening pressure by inserting shims. For shim thickness, 5 mm [0.2 in.] corresponds to a change in pressure of approximately 0.1 MPa (1 kgf/cm 2 ) [14 psi].

Set pressure (max. speed), MPa (kgf/cm

) [psi]

Assembly Standard ...

0.49–0.64 (5.0–6.5) [71.12–92.46]

Relief valve opening pressure

Assembly Standard ...

0.50 ±0.02 (5.0±0.2) [71.10 ±2.84]

NOTE! The measured oil pressure might be above the set pressure when oil temperature is low, but it returns to the set pressure when oil temperature rises.

If adjustment with shims is not effective, replace the relief valve and spring.

IMPORTANT! A dirty oil cooler will increase the oil temperature and consequently lower the oil pressure.

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Group 22 Lubrication System

Inspecting the left side oil cooler

Test the oil path with compressed air of 1.47 MPa (15 kgf/cm 2 ) [213 psi] for damage or cracks in the element. If there is any leakage, replace the element.

Inspection the left side thermostat

Inspect the oil thermostat seal for deterioration and cracks. If any are found, replace the seal.

Refer to the drawing on the right that shows the correct direction for seal installation.

Operation testing

Immerse the thermostat in engine oil, then measure the temperature where the valve opens, then measure it again when the valve lift is 11 mm [0.43 in.].

Replace the thermostat if temperatures are not within standard.

Temperature for valve opening, °C [°F]

Assembly Standard ...

80–84 [176–183.2]

Temp. for 11 mm [0.43 in.] valve lift, °C [°F]

Assembly Standard ...

95 [203]

IMPORTANT! Stir the oil to maintain even temperatures during the test.

IMPORTANT! At reassembly, confirm the valve opening temperature stamped on its mounting flange.

Reassembly

Reassembly is the reverse procedure of disassembly.

Replace packing and O-rings for reassembly.

Before reassembly, clean the oil paths of the oil filter bracket, etc. by flushing them with oil and blowing them with air.

Install the oil filter element with its bracket.

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143

Group 22 Lubrication System

Right Side Oil Cooler and Oil Thermostat

Disassembly

Connector

Oil thermostat

Oil cooler

Oil cooler element

Thermostat

Look for:

A. Holes clogged, cracking

B. Deterioration, wear, cracks

C. Wear, cracks

D. Replace packing

Inspection

Follow the same inspection procedure as that for the left side oil cooler and oil thermostat. If any deterioration is found, replace them.

Reassembly

Reassembly is the reverse procedure of disassembly.

Replace packing and O-rings for reassembly.

Before reassembly, clean the oil paths of the oil cooler cover, etc. by flushing them with oil then blowing them with compressed air.

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Group 23 Fuel System

Fuel Filters

Group 23 Fuel System

Disassembly

Filter element

Bolt

Cover

O-ring

Cock

Fuel filter bracket

Packing

Air vent plug

Look for

A. Cracks, damaged threads

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145

Group 23 Fuel System

Reassembly

Reassembly sequence:

5 4 6 8

2 1

To install the filter, clean the mounting surface and apply fuel oil to the gasket. After bringing the gasket into contact with the sealing surface of the bracket, tighten the filter with your hand about one-half to three quarters of a full tum. Bleed the filter.

NOTE! After installing the fuel filter on the engine start the engine and look for leaks.

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Fuel Injectors

Group 23 Fuel System

Disassembly

1. Cap nut, gasket

2. Adjusting screw

3. O-ring

4. Retaining nut

5. Nozzle

6. Spacer

7. Pushrod, nozzle spring, spring seat

8. O-ring

9. Nozzle holder

10. Fuel inlet connector

Look for

A. Fatigue, damage, length

B. Wear, damage

C. Carbon deposits, clogged spray hole, sticking needle valve

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147

Group 23 Fuel System

Inspection and Adjustment

Injection pressure

Install the nozzle on the nozzle tester. Operate the handle of the tester at a rate of about 1 stroke per setond to observe the pressure at which fuel is being injected. If the pressure is out of standard, adjust it.

Injection pressure, MPa (kgf/cm2) [psi]

Assembly Standard ...

34.32–34.81(350–355)[4979–5050]

WARNING! Never touch the spray hole of the injection nozzle during injection testing.

To adjust injection pressure, remove the set screw from the nozzle holder, loosen the cap nut, and then turn the adjusting screw. To increase the injection pressure, tighten the screw. To decrease the injection pressure, loosen the screw.

After completing the adjustment, tighten the set screw and the cap nut to the specified torque.

Re-check the injection pressure to be sure that it is correct.

Spray pattem

When you are testing the injection pressure, inspect each nozzle for clogged or leaking holes.

Also examine the spray pattem. If the nozzle is faulty, wash or replace it.

When tested on the nozzle tester, the nozzle should spray fuel from all ten holes at the same time in a straight cone of 160 degrees. The spray should tonsist of finely atomized fuel particles without large droplets. The spray should terminate without dripping at the top.

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Group 23 Fuel System

Washing or replacing the nozzle

The nozzle is spring loaded. Remove the set screw and loosen the adjusting screw until it can be loosened by hand.

Loosen the retaining nut, remove the nozzle and wash the needle valve and body.

IMPORTANT! When pulling out the nozzle, do not damage the tip.

Wash the nozzle in clean diesel fuel oil. After washing, assemble the needle valve and body in clean diesel fuel.

NOTE! The needle valve and body are finely finished.

Do not change the pairing of needle valve and body when cleaning more than one nozzle at the time

Tighten the retaining nut to the specified torque.

If the spray pattem is still bad after the nozzle has been adjusted and cleaned, replace the nozzle.

NOTE! New nozzle tips are coated with vaseline to preserve them. Wash them in diesel fuel before you install them.

NOTE! Avoid getting “Copa slip” or “Molycote” on the needle.

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149

Group 23 Fuel System

Reassembly

Reassembly Sequence:

8 7 6 5 4

IMPORTANT! Tighten the retaining nut to the specified torque. Excessive torque on the retaining nut will cause sticky movement of the needle and will result in exhaust smoke or the needle stick.

NOTE! Always replace all o-rings at reassembly.

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Fuel Injection Pump

Group 23 Fuel System

Disassembly

1. Drain plug

2. Rack set cap

3. Sealing washer

4. Jam nut

5. Bolt

6. Spring case

7. O-ring

8. Self locking nut

9. Return spring

10. Coupling

11. Laminated plate

12. Cross coupling

13. Laminated plate

14. Flywheel

15. Feed pump

16. Valve holder

17. Spring seat

18. Delivery valve spring

19. Delivery valve assembly

20. Deflector bolt

21. Barrel bolt, washer

22. Plunger assembly

23. Barrel shim

24. Bellows

25. Set screw

26. Control rack

27. Tappet

28. Front cover, O-ring, bearing outer race

29. Bolt

30. Camshaft

31. Center bearing

32. Bearing inner race

33. Rear cover, oil seal, bearing outer race

34. Shim

35. Lower spring seat

36. Plunger

37. Plunger spring

38. Upper spring seat

39. Pinion

40. O-ring

41. Barrel

42. Pump case

43. Rack bushing

Look for:

A. Damage of threads

B. Fatigue

C. Wear and cracks on teeth, wear of sliding surfaces

D. Ridges caused by abrasion, cracks

E. Wear, scratches

F. Erosion

G. Cracking

H. Damage and scratches on bushing contact surfaces, cracks

I. Rotation condition

J. Pitching, roller surface roughness

K. Scratches wear

L. Damage and scratches on key grooves and seal contact surfaces, wear of cam surface

M. Rack sliding resistance, wear of teeth

N. Wear

O. Wear, scratches, discoloration, corrosion, erosion

P. Contact surface

Q. Seat contacting surface

NOTE! The fuel injection pump may be serviced by an Authorized Bosch workshop.

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151

Group 23 Fuel System

Preparing for disassembly

Hold the pump assembly stand with a vice.

Remove the drain plug from the bottom of the pump and drain oil from the case.

Clean the outer surface of the injection pump, and mount the pump on the pump assembly stand.

Remove the rack set cap and the sealing washer.

Unscrew two jam nuts, and remove the spring case.

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Group 23 Fuel System

Unscrew the self-locking nut, and remove the return spring.

NOTE! Do not reuse the self-locking nut.

Remove the couplings, laminated plates, cross coupling, flywheel and feed pump.

NOTE! When removing the flywheel mounting nut, insert turning bar into the turning bar hole located at the flywheel periphery, in order for the flywheel to avoid slipping.

Removing delivery valves

Remove delivery valve holders. Remove the spring seat, delivery valve spring, delivery valve and valve seat from each valve holder.

NOTE! Place each pair of delivery valve and valve seat in clean diesel fuel. Do not swap the original combinations of delivery valves and valve seats.

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153

Group 23 Fuel System

Removing plunger assemblies

Position the tam at the bottom dead center in the cylinder from which the plunger assembly is removed.

Remove the deflector bolt located on the back side of the pump case.

IMPORTANT! Be sure to remove the deflector before removing the plunger assembly. If the plunger assembly is removed without removing the deflector bolt first, damage results in the deflector bolt and plunger assembly.

Screw the Plunger holder (48291-00301) in the threaded hole on the upper end of the plunger.

Loosen two barrel bolts altemately, and lift the plunger assembly and remove.

Removing the control rack

Dislodge the bellows from the grooves of the control rack and rack bushing installed in the pump case, and remove the bellows.

Remove the set screw from the back side of the pump case, and pull out the control rack.

NOTE! After removing the set screw, conduct a color check or magnaflux inspection to make sure there are no cracks.

NOTE! Do not remove the rack bushing unless necessary.

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Group 23 Fuel System

Removing tappets

Hook a wire to two small holes (4-mm (0.16 in.) dia.) on the upper side of the tappet, and pull out the tappet.

Removing the camshaft

Unscrew four front cover mounting bolts, and remove the front cover and bearing outer race.

Tilt the pump case sideways, and remove two center bearing mounting bolts.

Strike the camshaft on the drive-side end with a soft hammer to remove the camshaft and center bearing.

Remove the bearing inner races from both ends of the camshaft.

Removing the rear cover

Remove the rear cover mounting bolts. Insert the tips of screwdrivers into the notch located on the side of the rear cover, and pry out. Remove the shim.

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155

Group 23 Fuel System

Disassembling plunger

Mount the plunger assembly on the plunger spring compression jig (4829 1-00200).

Press the knob on the jig to tompress the plunger spring, then remove the plunger holder jig.

Loosen the compression of the plunger spring gradually, and remove the lower spring seat, plunger and plunger spring from the barrel.

IMPORTANT! Handle plungers carefully to prevent damage and scratches.

IMPORTANT! Place the removed plungers in a tray with clean diesel fuel, do not change the original combinations of plungers and barrels.

Remove the barrel from the plunger spring compression jig, then remove the upper spring seat, pinion and O-ring.

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Group 23 Fuel System

Inspection

NOTE! After disassembly, wash parts in clean diesel oil. Replace defective or damaged parts.

Plungers and barrels

Inspect the lead section and tip of each plunger for wear, scratches, discoloration, and erosion.

After washing with clean diesel fuel, check each plunger by tilting approximately 15’ and lifting it approximately 30 to 35 mm [ 1.18 to 1.38 in.], as shown in the diagram. The plunger must fall smoothly on its own weight. Change the plunger position by turning it slightly and check again. Repeat this test two or three times for each plunger.

If the plunger falls too quickly or sticks before it reaches the bottom, replace the plunger and barrel as a set.

Delivery valves

In each delivery valve, inspect the valve seat and sliding surfaces for scratches and check contacting surface to the barrel.

Wash parts with clean diesel oil. Lift the valve and let it fall, making sure that it slides down smoothly to the valve seat.

If the valve sticks, replace the delivery valve and valve seat as a set.

Tappets

Check each tappet roller, roller bearing and tappet pin for flaking, lotal wear and scratches.

Check overall clearance of tappet, taper roller, roller bearing and tappet pin. If the measurement exceeds the service limit, replace with a new assembly.

Overall clearance of tappet roller, mm [in.]

Service Limit .............

0.2 [0.00787]

Inspect the plunger contact surface of each tappet. If the amount of wear exceeds the service limit, replace with a new assembly.

Tappet wear of plunger contact area, mm [in.]

Service Limit .............

0.2 [0.00787]

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157

Group 23 Fuel System

Camshaft

Check the key and key groove for excessive play. Also check the tapered section for scratches, and the tam surfaces for flaking, local wear and scratches. If damage is found, replace the camshaft.

Check the oil seal contacting surface for wear. If the amount of wear exceeds the service limit, replace with a new part.

Camshaft diam. at oil seal contact area, mm [in.]

Assembly Standard ...

34.938–34.963 [1.37551–1.37649]

Service Limit .............

34.800 [1.37001]

Support the camshaft with V blocks, and measure runout at the center bearing section using a dial gauge. If the amount of runout exceeds the repair limit, correct with a press or replace with a new part.

Camshaft deflection, mm [in.]

Assembly Standard ...

0.05 [0.00197]

Repair Limit ...............

0.15 [0.00591]

Bearing

Check the bearing for flaking, abnormal abrasion and noise. If damage is found, replace with a new part.

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Group 23 Fuel System

Plunger and delivery valve springs

Check the surface of each spring for scratches and rust.

Using a square, measure the perpendicularity

(gap, B) at the upper end of the spring.

If the measurement exceeds the service limit, replace the spring.

Plunger Spring, mm [in.]

Free length (A)

Assembly Standard ...

70.8 [2.787]

Perpendicularity (B)

Service Limit .............

1.8 [0.071]

Length under test force, mm [in.]

Assembly standard ...

60.0 [2.36]

Test force, N (kgf) [lbf]

Assembly standard ...

299–366 (30.5–37.3) [67.2–82.2]

Delivery valve spring, mm [in.]

Free length (A)

Assembly Standard ...

18 [0.71]

Perpendicularity (B)

Service Limit .............

0.6 [0.024]

Length under test force, mm [in.]

Assembly standard ...

14.15 [0.56]

Test force, N (kgf) [lbf]

Assembly standard ...

51.6-61.4 (5.26–6.26) [11.60–13.80]

Valve holders

Check the contacting surfaces of injection pipe and delivery valve on each valve holder for scratches.

If the contact surfaces are scratched, replace the valve holder since surface scratches can cause fuel leakage.

Pump case

Check the pump case for surface scratches, dents, cracks and damage. If critical flaws are found, replace with a new part.

O-rings and bellow

Replace O-rings, gaskets and below with new ones once disturbed.

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159

Group 23 Fuel System

Reassembly

Reassembly sequence:

42 28

30 31 32 29 34 33 27 26 25

22 23 21

18 17

16 21 15 14 13 12

41 40 39 38 37 36 35 11

10 9 8

5 4

2 1

NOTE! The reassembly of the jam nut (4) and subsequent steps should be performed after the parts are mounted on the engine and adjusted properly.

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Group 23 Fuel System

Assembling the bearing and front cover

Install the O-ring and bearing outer race on the front cover.

Install the front cover on the pump case by striking with a hammer.

Tighten the front cover mounting bolts.

Assembling the camshaft center bearing

Install the bearing inner race on the camshaft by striking with a hammer.

Lay the pump case on its side.

Place the center bearing on the camshaft, and insert the shaft into the pump case.

Slowly rotate the camshaft and align the bolt hole in the center bearing with the bolt hole in the pump case, then tighten the mounting bolt.

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161

Group 23 Fuel System

Assembling the rear cover

Install the bearing outer race on the rear cover.

Install the O-ring and shim on the rear cover, and install the rear cover on the pump case.

Camshaft thrust clearance

Set a dial gauge on the end surface of the camshaft, and measure end play using the Cam thrust ejector.

Camshaft thrust end play, mm [in.]

Assembly Standard ...

0.02–0.06 [0.00079–0.00236]

If the measured clearance deviates from the assembly standard, increase or decrease the shim thickness to make adjustment.

Tum the camshaft to make sure if it rotates smoothly.

Installing tappets

Install the tappet roller and roller bearing in each tappet, and insert the tappet pin in each assembly.

Apply lubricating oil to each part.

After the assembly, make sure the roller rotates smoothly without sticking.

Install tappets in the pump case by positioning each tappet so the falt faces of the tappet engages securely with the stopper pin.

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Group 23 Fuel System

Assembling plunger assemblies

NOTE! Wash each part with clean diesel fuel before assembly. Use new O-rings and apply grease to the

O-rings to prevent damage during assembly. Install the O-rings in the sequence of A, B and C.

Install three O-rings on each barrel.

Install the pinion and upper spring seat on each barrel by tapping with a hammer. Make sure the pin inserted in the barrel is positioned at the notch of the upper spring seat.

Set the assembly of the barrel, pinion, upper spring seat on the plunger spring compression jig. Insert the jig stopper in the pinion tooth section (missing tooth section). This stopper positions the missing tooth section (for prevention of incorrect engagement with rack) of the pinion to the center of the inspection hole in the upper spring seat.

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Group 23 Fuel System

Align the flange section of the plunger properly with the plunger seating section of the pinion using a screwdriver.

Press down the knob of the jig to insert the plunger into the plunger seating section of the pinion, then screw the plunger holder to the threaded section of the plunger head.

Installing the control rack

Insert the control rack in the pump case, making sure the “F” mark on the end surface or the threaded section is positioned on the driven side, then tighten the set screw to 21 Nom (2.1 kgf-m) [

15 lbf-ft].

Look through the cylinder from the upper side of the pump case, and move the control rack so the thick tooth (three times thicker than other teeth for prevention of incorrect engagement with pinion) is positioned at the center of the cylinder in the pump case.

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Group 23 Fuel System

Installing plunger assemblies

Position the cam at the bottom dead center in the cylinder to which the plunger assembly is installed.

Place the Stopper plate (1) on top of the pump case to prevent damage to the pinion and control rack during the installation of the plunger assembly.

NOTE! If the stopper plate is not used during plunger assembly installation, the teeth on the pinion hit the teeth on the rack, causing rough edges that hinder smooth rack movement.

Hold the flange of the barrel with both hands and press down the plunger assembly until the bottom side of the flange contacts the stopper plate.

Remove the stopper plate, and lower the plunger assembly by serching the correct meshing slowly. Do not apply excessive forte to press down the plunger assembly. If the plunger assembly is jammed, turn the flange by jiggling back and forth, then press down.

Insert standard barrel shims (thickness: 1.0 mm

[0.04 in.] ) under each barrel flange, and align the reference mark on the barrel flange with the alignment mark (1.5-mm [0.06 in.]diameter hole) on the pump case.

IMPORTANT! In each cylinder, insert barrel shims of the same thickness, one in front and one in back. (Do not use two or more shims at one location.) If the shim thickness varies in the front and back of a cylinder, the rack may not move smoothly, causing hunting or other problems.

Install washers on the barrel bolts, and screw the bolts snug. Then, using a torque wrench, tighten the bolts progressively and evenly to 78 to 83

N*m (8.0 to 8.5 kgf m) [58 to 61 Ibf ft].

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Group 23 Fuel System

Remove the Plunger holder. Make sure the control rack slides and strokes smoothly.

IMPORTANT! Move the rack after installing each plunger assembly to make sure it moves smoothly (sliding resistance: 4.9 N (0.5 kgf) [

1.10 IbfJ or less). At the same time, check to make sure the total rack stroke is 36 mm [ 1.42

in.].

Control rack sliding resistance

After the pump assembly is completed, attach a spring balancer to the control rack and make sure the control rack moves smoothly over the entire stroke.

Control rack sliding resistance, N (kgf) [lbf]

Assembly Standard ...

4.9 (0.5) [1.10] or less

After making sure the rack sliding resistance is lower than the standard value, install the deflector bolts on the pump case to 41 N*m (4.2 kgfem)

[30 lbf.ft].

Assembling delivery valves

In each barrel, install delivery valve, valve spring, spring seat and valve holder in that order.

Apply grease to a new O-ring to prevent 0; ring from damage, then install the O-ring on each valve holder.

Using a torque wrench, tighten the valve holders to 235 to 255 N*m (24 to 26 kgfam) [174 to 188 lbfaft].

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Group 23 Fuel System

Installing the bellows

Insert the protrusions on the bellows into the grooves on the control rack and rack bushing and install the bellows.

Installing the flywheel

Install the flywheel, making sure it aligns with the woodruff key of the camshaft, then tighten the jam nut to 329 N*m (40 kgf-m) [289 lbf&].

Installing the coupling assembly

Install sets of short bushings, short bolts and coupling washers in two diagonally located holes in the laminated plate.

WARNING! If the coupling washer is installed in the wrong direction, the laminated plate can break. When the laminated plate breaks, bolt damage occurs and can result in a serious accident.

NOTE! Set the side of the coupling washer with a radiused outer edge on the laminated plate.

While making sure that the short bolts and coupling washers installed on the laminated plate remain in place, install the laminated plate to the cross coupling by screwing short bolts with long bushings and coupling washers in the remaining two holes in the laminated plate from the opposite side. Tighten the short bolts to 103 to 113 N-m

(10.5 to 11.7 kgf-m) [76 to 83 lbf-ft].

NOTE! Use a spanner-type torque wrench to tighten the short bolts.

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Group 23 Fuel System

Tighten the two remaining short bolts on the laminated plate mounted with the cross coupling to install the laminated plate securely to the flywheel. Tighten the bolts to 103 to 113 N-m (10.5

to 11.5 kgf-m) [76 to 83 lbf-ft].

NOTE! When tightening the short bolts be sure not to drop the coupling washers.

Install short bushings, long bolts and coupling washers to two diagonally located holes in the other laminated plate.

Install the laminated plate to the coupling on the drive side using the wide coupling washers.

Tighten the flange nuts to 103 to 113 Nrn (10.5 to

11.5 kgf-m) [76 to 83 lbf ft].

Install sets of long bushings and coupling washers to the laminated plate, and install the laminated plate to the cross coupling with short bolts.

Tighten the short bolts to 103 to 113 N-m (10.5 to

11.5 kgf-m) [76 to 83 lbf ft].

NOTE! Make sure the coupling on the drive side is positioned so that the key groove of the drive coupling faces the black line on the flywheel, as shown in the diagram.

Installing the control rack retum spring

Install the retum spring, plain washer and spring washer to the control rack, and install and tighten a new self-locking nut.

NOTE! After tightening the self-locking nut, flatten the cylinder section.

Install the spring case.

The two jam nuts installed at the tip of the control rack hold the control rack at the maximum injection position. Therefore, after the injection pump is installed to the engine, make adjustments on a test bench. Do not conduct the following assembly procedure on the dismounted injection pump.

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Group 23 Fuel System

Adjustment of Injection Timing

Adjustment of the prestroke

After the pump assembly is completed, place it on an injection pump tester, and make the following adjustments.

Remove the deflector bolt from the back side of the pump case.

Remove the valve holder from cylinder No. 1

(counter-drive side), then remove the spring seat, valve spring and delivery valve.

Set the measuring tip of a dial depth gaugeon the head of the plunger. Rotate the camshaft by hand to bring the plunger to the bottom dead center by reading the indication on the depth gauge. Set the depth gauge indicator to “0”.

Tum the camshaft in the normal operating direction until the dial depth gauge indicates 5 mm [0.2

in.].

With the camshaft in this position, check to make sure the pointer located on the pump case end surface aligns with the stamped line on the flywheel. If they are not aligned, stamp a new line on the flywheel at the pointer position.

Point a flashlight from the top of the pump case, and look through the deflector bolt hole and check the position of the upper end of the plunger.

Rotate the camshaft until the upper end of the plunger closes the barrel suction hole. With the camshaft in this position, the pointer should align with the stamped line on the flywheel. If not, change the shims so the pointer aligns with the line.

NOTE! Increase of shim thickness retards injection timing and decrease of shim thickness advances injection timing

IMPORTANT! Never use more than one shim on each side. Use shims of the same thickness on both sides of the cylinder.

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Group 23 Fuel System

Adjustment of injection intervals

For cylinder No. 2 and subsequent cylinders, use the injection start timing of cylinder No. 1 as the reference point and check the injection start intervals on the angle scale on the pump tester according to the injection sequence.

If the injection intervals deviate from the specification, make adjustment by adjusting the thickness of the barrel shims in the same way for prestroke adjustment.

NOTE! Injection start intervals 60°±0.5°

Adjustment of Injection Volume

Install a fuel hose and the specified fuel pipe to the fuel injection pipe.

Adjustment conditions.

Nozzle holes Ø(10) ...

0.31 mm [0.012 in.]

Nozz. opening press.

34.32 MPa (350 kgf/cm 2 ) [4979 psi]

Feed pressure

MPa(kgf/cm 2 )[psi] ......

0.3±0.05 (3±0.5) [42.7±7.1]

Fuel pipe dimensions

outØ x inØ x L ...........

(7x2.8x817mm) [0.28x0.11x32.2 in.]

Test fuel ....................

JIS Class 2 diesel fuel

Test fuel temp. ..........

40±10°C [104±18°F]

To adjust the injection volume, loosen barrel bolts and slowly turn the barrel.

After adjustment, tighten the barrel bolts alternately to 78 to 83 N

● m (8 to 8.5 kgf

● m) [58 to 61 lbf

● ft] torque.

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Feed Pump

Group 23 Fuel System

Disassembly

1. Priming pump

2. Spring

3. Valve

4. Plug

5. Spring

6. Valve

7. Plug

8. Spring

9. Piston

10. Puch rod

11. Snap ring

12. Tappet

13. Adapter

14. Pump housing

Look for

A. Scuffing, rust on piston and cylinder

B. Fatigue

C. Dust particles Gauze filter: Wash with diesel fuel

D. Cracks, damage of threads

E. Wear of seat

IMPORTANT! Do not disassemble the gauge filter if it is clogged, the filter may become twisted and damaged. Remove as much dust as possible through the small holes, then disassemble the gauge filter with a screwfriver.

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Group 23 Fuel System

Reassembly

Reassembly Sequence:

14 13 12 11 10 9 8 7 6 5 4 3 2 1

Testing

Airtightness test

Plug the discharge port. Apply air pressure of 0.2

MPa (2 kgf/cm 2 ) [28.4 psi] to the suction port, immerse the pump in diesel fuel, and check for air leakage (bubbles).

Feed pump test

Testing conditions

Fuel pipe, mm [in.]

Outside diameter ......

15 mm [0.59 in.]

Inside diameter .........

13 mm [0.51 in.]

Length .......................

2000 mm [78.7 in.]

Cam, mm [in.]

Lift per revolution ......

12 mm [0.47 in]

Run the pump under the above conditions, and measure the discharge start time.

Feed pump discharge start at 100 rpm, sec

Assembly Standard ...

20 sec or less

Priming pump suction capacity

Discharge fuel completely from the feed pump in the testing conditions described in the feed pump test.

Then, operate the priming pump at a rate of 60 to 100 strokes per minute, and count the number of pumping operations required for fuel to reach the pump.

Priming pump discharge start, strokes

Assembly Standard ...

30 or less

Feed rate test

Open the valve on the discharge side in the testing conditions described in the feed pump test. Operate the pump and measure the amount of oil fed during the first 15 seconds.

Feed rate at 500 rpm, cm

[cu.in.]/15 sec.

Assembly Standard ...

1100 [67.1] or more

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Group 23 Fuel System

PSG Woodward Governor and Drive

Disassembly

1. PSG governor

2. Packing

3. Drive case

4. O-ring

5. Idler gear

6. Snap ring

7. Idler shaft

8. Washer, bolt

9. Bearings

10. Drive gear

11. Snap ring

12. Drive shaft

13. Snap ring

14. Bearings

Look for

A. Rotation

B. Wear

C. Wear of teeth

D. Wear of spline

Plus d'informations sur : www.dbmoteurs.fr

173

Group 23 Fuel System

Inspection

Inspection of bearings

Rotate each bearing to check for rotation. Replace a bearing which fails to rotate smoothly. Check the fit of bearings on the drive shaft and idler shaft. Replace the shaft or bearings whichever are badly worn.

Check the fit of bearings in the drive case, and replace a worn part.

Case bore diam., drive shaft-side, mm [in.]

Nominal Value ...........

52 [2.05]

Assembly Standard ...

51.988–52.018 [2.04677–2.04795]

Drive shaft side bearing, mm [in.]

Outside diameter

Nominal Value ...........

52 [2.05]

Assembly Standard ...

51.987–52.000 [2.04673–2.04742]

Inside diameter

Nominal Value ...........

25 [0.98]

Assembly Standard ...

24.990–25.000 [0.98386–0.98425]

Drive shaft diam., mm [in.]

Nominal Value ...........

25 [0.98]

Assembly Standard ...

25.002–25.011 [0.98433–0.98468]

Case bore diam., idler shaft side, mm [in.]

Nominal Value ...........

47 [1.85]

Assembly Standard ...

46.989 to 47.014 [1.84996 to

1.85094]

Idler shaft side bearing diameter, mm [in.]

Outside diameter

Nominal Value ...........

47 [1.85]

Assembly Standard ...

46.988–47.000 [1.84992–1.85039]

Inside diameter

Nominal Value ...........

20 [0.79]

Assembly Standard ...

19.990–20.000 [0.78701–0.78740]

Idler shaft diam., mm [in.]

Nominal Value ...........

20 [0.79]

Assembly Standard ...

20.002–20.011 [0.78748–0.78783]

174

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Reassembly

Group 23 Fuel System

Reassembly Sequence:

3 9 7 8 6 5 14 12 13 11 10 2 1 4

Plus d'informations sur : www.dbmoteurs.fr

175

Group 25 Inlet and Exhaust System

Air Cooler

Disassembly

1. Air cooler cover

2. Packing

3. Air cooler element

4. Plate

5. Packing

6. Air cooler case

7. Packing

8. Air cooler element

9. Plate

10. Packing

Look for:

A. Replace packing

176

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Group 25 Inlet and Exhaust System

Inspection

Cleaning air cooler

Remove dirt built up from the air cooler by directing high pressure air of {max press. 0.29 to 0.49

MPa (3 to 5kgf/cm 2 ) [43 to 71 psi]} in the opposite direction of the air flow. Inspect the cooler for corrosion and cracks.

Wash the fresh water or salt water pipes in water and caustic soda lime, then remove scale deposits by inserting a 3 mm [ 1/8 in.] bar into each pipe.

Inspecting air cooler for air tightness

Immerse the air cooler in water, then apply high pressure air {max press. 0.39 MPa (4 kgf/cm 2 ) [57 psi]} to the coolant side to inspect for air leaks.

NOTE! Keep record of the water/air temperatures(using infrared temp. gun) to determine when the cooler needs cleaning.

Plus d'informations sur : www.dbmoteurs.fr

177

Group 25 Inlet and Exhaust System

Turbocharger

Disassembly

1. V-clamp

2. Compressor cover

3. Diffuser

4. O-ring

5. Lock nut

6. Compressor wheel

7. Snap ring

8. Insert

9. Finger sleeve

10. Piston ring

11. O-ring

12. Oil deflector

13. Thrust ring (compressor)

14. Thrust bearing

15. Thrust ring (turbo)

16. Bolt

17. Turbine housing

18. Shaft and turbine wheel

19. Piston ring

20. Turbine backplate

21. Bearing

22. Snap ring

23. Snap ring

24. Bearing

25. Snap ring

26. Bearing housing

Look for:

A. Wear

B. Thrust face wear

C. Vane distortion, damage, rubbing contact on back face and gas erosion

D. Rubbing contact with compressor wheel

E. Rubbing contact with turbine wheel, cracks and distortion

F. Vane distortion, damage, rubbing contact on back face and gas erosion and damage to ring grooves

G. Rubbing contact with turbine wheel and damage

H. Damage to bearing bore, gas erosion and distortion of turbine side flange

178

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Group 25 Inlet and Exhaust System

Disassembly

Preparing for disassembly

Mount the turbine housing In a vice by clamping at the flange.

IMPORTANT! Clamp the flange securely to prevent the turbine housing from loosening or moving during work.

Removing the compressor cover

The compressor cover, bearing housing and turbine housing must be reassembled in correct orientation. Therefore, put alignment marks with a punch or marker.

Loosen the V-clamp using a socket wrench.

Lightly tap around the compressor cover with a soft-faced hammer to remove the cover.

Removing the diffuser

Lightly tap around the diffuser with a soft faced hammer to remove the diffuser.

Remove O-ring from the bearing housing.

Plus d'informations sur : www.dbmoteurs.fr

179

Group 25 Inlet and Exhaust System

Removing the compressor wheel

IMPORTANT! Handle the compressor wheel and turbine wheel with care during disassembly and assembly. Vanes can easily bend when dropped or hit.

While holding the boss of the shaft & turbine wheel remove the lock nut fastening the compressor wheel.

While holding the turbine wheel with one hand, turn the compressor wheel lightly with the other hand and remove.

Removing the snap ring

NOTE! Use only snap ring pliers to remove snap rings.

NOTE! Put your thumb on the snap ring to prevent it from flying out in case the pliers lose grip.

180

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Group 25 Inlet and Exhaust System

Removing the insert and oil deflector

Using two screwdrivers, gently pry out the insert from the bearing housing.

Separate the finger sleeve together with the piston ring from the insert.

Remove the o-ring, the oil deflector, the compressor thrust ring, the thrust bearing, and the turbo thrust ring from the bearing housing.

Removing the shaft & turbine wheel

Remove the bolts and lock plates.

While gripping the shaft of the shaft & turbine wheel with one hand, hold the bearing housing with the other hand and slowly remove the shaft

& turbine wheel from the turbine housing.

Turn the bearing housing (turbine wheel face up) and place it on the compressor cover. Remove the shaft and turbine wheel, the piston ring, the turbine backplate and the bearing(compressor side).

Removing the snap ring and bearing

IMPORTANT! Remove the snap ring with care and make sure not to damage the inside surface of the bearing house or the seal (turbine side) of the piston ring.

Place the bearing housing on a workbench with the compressor side face up. Then remove the 3 snap rings and the bearing.

Plus d'informations sur : www.dbmoteurs.fr

181

Group 25 Inlet and Exhaust System

Inspection

Bearing housing

Measure inside diameter of bearing-fitted section

If the measured diameter exceeds the service limit, replace the bearing housing.

Inside diam. bearing-fitted section, mm [in.]

Service Limit .............

34.016 [1.33921]

Bearing

Measure bearing outside diameter

If the measured diameter is less than the service limit, replace the bearing.

Bearing inside diameter, mm [in.]

Service Limit .............

33.882 [1.33393]

Measure bearing inside diameter

If the measured diameter exceeds the service limit, replace the bearing.

Bearing inside diameter, mm [in.]

Service Limit .............

19.929 [0.78460]

Measuring bearing length

If the measured length is less than the service limit, replace the bearing.

Bearing length, mm [in.]

Service Limit .............

19.44 [0.76535]

182

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Group 25 Inlet and Exhaust System

Shaft & turbine wheel

Measure journal diam. of shaft & turbine wheel

If the measured diameter is less than the service limit, replace the shaft & turbine wheel.

Shaft journal diameter, mm [in.]

Service Limit .............

19.863 [0.78201]

Measure shaft deflection

Set a dial gauge at a location next to the threaded section of the shaft, and measure shaft deflection. If the deviation indicated by the dial gauge exceeds the service limit, replace the shaft & turbine w heel.

IMPORTANT! If the shaft is bent, replace.

Do not attempt to correct the bend.

If the surface of the shaft journal is rough, mount the shaft on a lathe, and gently polish the surface using #400 sandpaper and engine oil while rotating at 300-600 min

-1

Shaft deflection, mm [in.]

Service Limit .............

0.015 [0.00059]

Insert

Measure piston ring end gap

Install a new piston ring squarely in the insert then measure the piston ring end gap. If the end gap deviates from the assembly standard, replace the insert.

Ring end gap, mm [in.]

Assembly Standard ...

0.05–0.20 [0.00197–0.00787]

Plus d'informations sur : www.dbmoteurs.fr

183

Group 25 Inlet and Exhaust System

Reassembly

Reassembly sequence:

26 25 23 24 22 20

19 18

21 15 14 11 13 12

9 8

7 6 5 17 16 4 3

NOTE! Always replace the following parts at disassembly:

4. O-ring

9. Piston ring

11. O-ring

19. Piston ring

IMPORTANT! If vanes are damaged or cracked, do not reuse the part.

IMPORTANT! After reinstalling the overhauled turbocharger, crank the engine to lubricate moving parts of the turbo.

184

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Group 25 Inlet and Exhaust System

Install shaft & turbine wheel and bearing

Install the bearing housing, the snap rings and the bearing on the turbine side, and the snap ring on the compressor side.

NOTE! Use only snap ring pliers to install snap rings.

After installing the snap ring, rotate it with a finger to make sure it rotates smoothly.

NOTE! Apply engine oil to the outside and inside surfaces of the bearing before installation.

Place the bearing housing on the compressor cover, and install the turbine backplate.

Insert the piston ring into the groove on the shaft

& turbine wheel

When installing the shaft & turbine wheel mounted with the piston ring in the bearing housing, position the ring on the shaft so that there is a small space (A) at the ring end gap side (B) and a large space (C) on the other side. Then insert the shaft

& turbine wheel while rotating.

IMPORTANT! Do not expand the piston ring excessively or twist the ends when installing on the shaft & turbine wheel.

IMPORTANT! Do not apply excessive forte without tentering the shaft properly during the installation of the shaft & turbine wheel.

NOTE! After installing the piston ring in the ring groove, apply Moly Disulfide to the ring before assembly.

Hold the shaft end and tum the assembly over so the compressor side faces up. Install the bearing on the compressor side and then mount the bearing housing on the turbine housing and fasten the bolt temporarily.

Plus d'informations sur : www.dbmoteurs.fr

185

Group 25 Inlet and Exhaust System

Installing the thrust bearing

Apply engine oil to both sides of the thrust ring and thrust bearing. To install the thrust bearing, align the notch with the groove pin.

Installing the O-ring

Apply grease to the O-ring and install.

Installing the oil deflector

Apply engine oil to both sides of the thrust ring and install. Then install the oil deflector with the baffle facing down.

186

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Group 25 Inlet and Exhaust System

Assembling the insert sub-assembly

Install the finger sleeve and the piston ring in the insert.

IMPORTANT! Do not expand the piston ring excessively or twist the ends when installing on the finger sleeve.

IMPORTANT! Apply Moly Disulfide to the piston ring installed on the finger sleeve, then install on the insert carefully so as to avoid piston ring damage.

After installing the above parts, irrstall the sub assembly in the bearing housing 26.

Installing the snap ring

Install the snap ring with the tapered side face up in the bearing housing. Make sure you install the snap

ring correctly!

NOTE! Lightly drive both ends of the snap ring using a screwdriver and hammer to securely insert the ring into the groove on the bearing housing. Make sure the screwdriver does not hit the bearing housing.

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187

Group 25 Inlet and Exhaust System

Turbine wheel and housing clearance

Set a dial gauge on the end face of the shaft & turbine wheel. Read the dial gauge indication while moving the shaft & turbine wheel in the axial direction.

If the dial gauge indication deviates from the assembly standard, disassemble and locate the cause of the problem.

Clearance turbine wheel and housing, mm [in.]

Standard Clearance ..

0.63–1.18 [0.02480–0.04646]

Installing the compressor wheel

Install the compressor wheel. Tighten the lock nut to the specified torque.

Lock nut tightening method

Tighten the lock nut to torque of 69 N

● m (7 kgf

● m)

[51 lbf

● ft], then loosen it completely.

Apply Loctite No. 962T to the threads.

Retighten to a snug torque of 9.8 N

● m (1 kgf

● m)

[7.2 lbf

● ft], then turn another 90±3°.

Shaft & turbine wheel axial play

Set a dial gauge on the end face of the shaft & turbine wheel. Measure the amount of play while moving the compressor wheel in the axial direction.

If the measured play deviates from the standard value, disassemble and locate the cause of the problem.

Shaft & turbine wheel axial play, mm [in.]

Assembly Standard ...

0.075–0.135 [0.00295–0.00531]

188

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Group 25 Inlet and Exhaust System

Turbine wheel and backplate clearance

Remove the turbine housing from the bearing housing and install the compressor cover. Measure the clearance between the turbine backplate and the back side of the turbine wheel using feeler gauges.

NOTE! Use two feeler gauges, and measure at vane tips.

If the clearance deviates from the assembly standard, disassemble and locate the cause of the problem.

Turbine wheel and turbine backplate clearance, mm [in.]

Standard Clearance ..

0.85–1.35 [0.03346–0.04528]

Installing the turbine housing

Check the mounting direction of the turbine housing, then install on the bearing housing.

Apply Moly Disulfide to the threads of the bolt, and tighten to the specified torque.

Installing the diffuser

Apply grease to the diffuser and install the bearing housing.

Install the diffuser.

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189

Group 25 Inlet and Exhaust System

Installing the compressor cover

Check the mounting direction of the compressor cover, then install.

Installing the V-clamp

Install the V-clamp 1 to the compressor cover 2 and tap around it with a soft-faced hammer for more than

3 times and tighten to the specified torque.

190

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Group 26 Cooling System

Fresh Water Pump

Group 26 Cooling System

Disassembly

1. Snap ring

2. Cover

3. Water pump impeller

4. Ring

5. Unit seal

6. Oil seal sleeve

7. Bearing

8. Water pump gear

9. Bearing

10. Water pump shaft

11. Oil seal

12. Pump case

Look for:

A. Rotation

B. Wear, deterioration of lip

C. Corrosion, chafing

D. Crack, damage

E. Wear, damage

Plus d'informations sur : www.dbmoteurs.fr

191

Group 26 Cooling System

Fresh water pump

Touch the drain port located at the bottom of the pump with your finger. If the port is leaking water, check the condition of the unit seal. If it is leaking oil, the oil seal is defective.

Remove the impeller

Remove the snap ring the water pump pliers then remove the cover.

Remove the impeller with the impeller remover.

Remove the water pump shaft

Remove the oil seal sleeve.

Remove the gear and the bearing with the gear puller.

Remove the snap ring of the impeller side ball bearing

Inset the two rings (A) of the ring remover between the unit seal and the pump case.

Fit the outer ring (B) to the outside of the half rings to prevent them from falling down.

Support the pump case and push out the shaft from the impeller side by pushing with a hand press .

192

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Group 26 Cooling System

Inspection

Water pump

Measure the inside diameter of the pump case bore to which the bearing outer race is fitted. Measure the diameter of the pump shaft on which the bearing inner race is fitted. If the bearing, case, or shaft is worn, replace it

Inside diameter of pump case bearing, mm [in.]

Norminal value ..........

Ø120 [4.72]

Assembly standard ...

119.987–120.022 [4.72389–

4.72527]

Pump case bore diameter, mm [in.]

Norminal value ..........

Ø110 [4.33]

Assembly standard ...

110.005–110.040[4.33090–4.33227]

Bearing Diameter, mm [in.]

Norminal value ..........

Ø120 [4.72]

Assembly standard ...

119.985–120.000[4.72381–4.72441]

Bearing Diameter, mm [in.]

Norminal value ..........

Ø110 [4.33]

Assembly standard ...

109.985–110.000

[4.33012–

4.33071]

Bearing Inside diameter, mm [in.]

Norminal value ..........

Ø55 [2.17]

Assembly standard ...

54.985–55.000 [2.16476–2.16535]

Bearing Inside diameter, mm [in.]

Norminal value ..........

Ø50 [1.97]

Assembly standard ...

49.988–50.000 [1.96803–1.96850]

Diameter of pump shaft, mm [in.]

Norminal value ..........

Ø55 [2.17]

Assembly standard ...

55.011–55.024 [2.16578–2.16629]

Diameter of pump shaft, mm [in.]

Norminal value ..........

Ø50 [1.97]

Assembly standard ...

50.011–50.024 [1.96893–1.96944]

Plus d'informations sur : www.dbmoteurs.fr

193

Group 26 Cooling System

Reassembly

Reassembly sequence:

NOTE! Replace all O-rings, unit seals and oil seals at reassembly.

12 11 5

10 9

8 7 6 4 3 2

Use the oil seal installer to drive in the oil seal.

Apply engine oil to seal lip.

Use the unit seal installer to drive in the unit seal.

Replace the unit seal once disturbed.

NOTE! Install the unit seal after coating the outer ring with sealant.

Press the impeller-side of the pump shaft, complete with ball bearings, into the case. Install the snap ring with its gap down.

Press in the unit seal ring with the unit seal floating seat using the ring installer .

NOTE! Before installation coat the floating seat at two locations with LLC solution (anti- freeze).

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Group 26 Cooling System

Insert the gear into the shaft by aligning the key.

Press in the ball bearing on the nut side.

Press in the impeller to the depth where impeller’s boss end face is flush with the shaft end.

Mount the cover on the impeller side, and secure it in place with the snap ring.

After installing the water pump assembly, install the alternator pulley and tighten the nut to the specified torque.

Plus d'informations sur : www.dbmoteurs.fr

195

Group 26 Cooling System

Thermostats

Disassembly

Thermostat cover

Packing

Snap ring

Thermostat

Thermostat seal

Thermostat case

Look for:

A. Deteriorated, worn, cracked

B. Replace packing

C. Worn, cracked

Inspection

Heat the thermostat in water. Measure the temperature when the valve opens. Measure it again when the valve lift is 11 mm [0.43 in.]. Replace if not within standard.

Opening temp., °C [°F]

Assembly standard ...

71±2 [159.8±3.6]

Valve lift 11 mm [0.43 in.] temp., °C [°F]

Assembly standard ...

85 [185]

NOTE! Stir the water to maintain even temperatures during the test.

NOTE! Confirm the valve opening temperature

(stamped on its mounting flange).

196

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Heat Exchanger

Group 26 Cooling System

Disassembly

Cover

Packing

Cover

O-ring

Zinc rod

Element

Body

Look for:

A. Pipes clogged, leaks

B. Change if less than 50% remains

Inspection

Cleaning of element

While pouring running water onto the outer surface of the element, clean with a wire brush.

Check the element for corrosion and tears.

Insert a stick into the pipe and remove deposits.

Plus d'informations sur : www.dbmoteurs.fr

197

Group 26 Cooling System

Raw Water Pump(standard rubber impeller)

Disassembly

1. Cover, O-ring

2. Impeller

3. Casing, gasket, plate, gasket

4. Bushing, unit seal

5. Slinger

6. Nut, spring washer

7. Pulley

8. Snap ring

9. Shaft, key

10. Bearing

11. Oil seal

12. Holder

13. Cam

IMPORTANT! The rubber impeller is not resistant to anti-freeze or cooling water conditioner.

198

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Group 26 Cooling System

Inspection

Bearing dimensions

Measure the dimensions of the bearing installation sections of the sea water pump holder and shaft. If excessive wear or damage is observed, replace the bearing, holder and shaft.

Inside diameter at bearing position, mm [in.]

Nominal value ...........

Ø110 [4.33]

Assembly standard ...

09.995–110.030 [4.33050–4.33188]

Service limit ..............

110.030 [4.33188]

Bearing outside diameter, mm [in.]

Nominal value ...........

Ø110 [4.33]

Assembly standard ...

109.985–110.000 [4.33011–.3307]

Bearing inside diameter, mm [in.]

Nominal value ...........

Ø50 [1.97]

Assembly standard ...

49.985–50.000 [1.96791–1.9685]

Shaft diam. at bearing position, mm [in.]

Nominal value ...........

Ø50 [1.97]

Assembly standard ...

50.002–50.013 [1.96858–1.96901]

Service limit ..............

50.000 [1.96858]

Plus d'informations sur : www.dbmoteurs.fr

199

Group 26 Cooling System

Reassembly

Reassembly sequence:

8 5 4

3 2 1 7

200

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Group 26 Cooling System

Install the cam to the casing, and tighten the screw to the specified torque. The contact surfaces must be coated with ThreeBond 1102.

Install the unit seal to the bushing by striking with a hammer, making sure the unit seal remains square to the bushing during installation. The contact surface must be coated with ThreeBond

1102

NOTE! Be sure to replace the unit seal with a new part

Using a jig and a hammer, install the bearing to the shaft, making sure the bearing remains square to the center line of the shaft.

Install the slinger (A) to the holder. Install the bushing (B) with unit seal to the holder. Clean the sliding surface (C) on the seat side of the unit seal with ethyl alcohol, then coat with turbine oil.

Install the seat side (D) onto the shaft, and fasten with the snap ring (E).

Plus d'informations sur : www.dbmoteurs.fr

201

Group 26 Cooling System

Install the casing to the holder via the plate. The contact surface must be coated with ThreeBond

1102. Tighten the bolts to 7.4 to 9.8 N*m (0.75 to

1.0 kgf*m) [5.42 to 7.23 lbf*ft].

Install the impeller to the shaft by striking with a hammer.

NOTE! Make sure the impeller vane tips are pointed in the direction opposite to the rotational direction.

Install the O-ring to the casing, and mount the cover. Tighten the bolts to the specified torque.

Tighten the nut to secure the pulley in place

(tightening torque: 196 N*m (20 kgf*m) [144.7

lbf*ft])

202

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Group 30 Electrical System

Starter

Group 30 Electrical System

Disassembly

Safety switch

Magnetic switch assembly

Rear bracket

Brush holder assembly

Yoke assembly

Armature assembly

Center bracket

Shift lever assembly

Front bracket

10. Pinion case

11. Pinion clutch assembly

Look for

A. Wear of gear, damage

B. Play and unsmooth rotation

C. Adhesion of brush particles, irregular wear, brush movement in holder

D. Wear of gear

E. Surface roughness, seizure, wear and damage

Plus d'informations sur : www.dbmoteurs.fr

203

Group 30 Electrical System

Remove the safety switch, wires and cables and the magnetic switch assembly.

Unscrew the through bolts and the brush holder mounting screws. Remove the rear bracket.

Remove the brushes from the brush holder assembly and then remove the yoke.

Pull out the armature assembly

204

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Group 30 Electrical System

Remove the center bracket.

Remove the lever pin, inner housing, and shift lever from the pinion case.

Using a jig, remove the pinion stopper, then remove the overrunning clutch from the pinion shaft.

NOTE! To remove the shaft bearing for replacement, use a bearing puller as shown in the drawing.

Plus d'informations sur : www.dbmoteurs.fr

205

Group 30 Electrical System

Inspection and Repair

Magnetic Switch

Testing the magnetic switch coil

Test the pressure coil and holding coil for an open ciruit. The coils are open-circuited if there is no continuity between the M terminal of the magnetic switch and the case.

Resistance: 1.4 ohms (approx.)

Apply voltage of 24 volts between the M terminal of the magnetic switch and the case. Now push in the plunger by hand. When you release your hand, the plunger should not be attracted.

Testing magnetic switch contact points

Measure the load current flowing through the starter.

If the voltage drop between terminals B and M exceeds 0.3 volts per 100 amperes, clean or replace the contact points.

If the starter switch is tumed to OFF during voltage measurement, the battery voltage is directly applied to the voltmeter. This can damage the voltmeter. Always turn the starter switch to ON before measuring the voltage, then turn it OFF after measuring the voltage.

IMPORTANT! Do not apply 24 V on terminals to test the magnetic switch movement.

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Group 30 Electrical System

Armature

Measuring the armature runout

Measure the runout with a dial gauge. If the deflection exceeds the assembly standard, repair or replace the armature.

Armature deflection, mm [in.]

Assembly Standard ...

0.05 [0.00197]

Inspecting the commutator

Check the condition of the commutator surface. If it is rough, polish it with #400 to #600 sandpaper.

Check the commutator for runout with a dial gauge. Replace the commutator if the deflection exceeds the service limit.

Commutator deflection, mm [in.]

Assembly Standard ...

0.06 [0.0024] maximum

Service Limit .............

0.10 [0.0039]

Measure the mica depth. Use a depth gauge to measure the depth of each mica undercut. If the depth exceeds the repair limit, re-condition the mica.

Commutator mica depth, mm [in.]

Assembly Standard ...

0.7 to 0.9 [0.028–0.035]

Repair Limit ...............

0.2 [0.0079]

Testing the armature

Use a growler to test the armature for short circuits. If the hacksaw blade vibrates against the core, replace the armature.

If there is continuity between the commutator and shaft, replace the armature.

Plus d'informations sur : www.dbmoteurs.fr

207

Group 30 Electrical System

Field coil

Testing for open circuits

If there is no continuity between the M terminal of the field coil and the lead wire on the brush side, replace the field coil.

Overrunning Clutch

The clutch is in good condition if it rotates freely in one direction when tumed by hand.

Check the pinion teeth for wear or damage. If they are damaged, replace the pinion.

IMPORTANT! Do not immerse the overrunning clutch in cleaning solvent to clean it. Immersion in cleaning solvent Will cause grease inside the clutch to run out, causing clutch parts to seize when operating.

Brushes

Inspecting for wear

Brush height, mm [in.]

Assembly Standard ...

21–22 [0.83–0.87](A)

Service Limit .............

13 [0.51](B)

Testing brush spring tension

Brush spring tension, N (kgf) [lbf]

Assembly Standard ...

39.23–49.03 (4.0–5.0 [9–11]

Service Limit .............

39.23 (4.0 [9] maximum

208

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Group 30 Electrical System

Safety Switch

Connect the safety switch as shown, and check the starter and safety switch operations.

Connect the R terminal to the battery minus (-) side.

Turn the switch on, and check that the starter tums.

After step (2) above is completed, if you remove the R terminal from the battery minus (-) side, or if you connect the terminal to the battery plus (+) side after removal, make sure you stop the starter operation.

IMPORTANT! When you are making connections, pay special attention to the battery’s polarity.

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209

Group 30 Electrical System

Reassembly

Reassembly sequence:

9 8 10 7 6

4 3 2 1

Install the center bracket, overrunning clutch, and pinion stopper to the pinion shaft. Insert the shaft in position by tapping it with a soft-head mallet.

Install the shift lever and pinion shaft to the front bracket by aligning the matching mark on the shifi lever.

Install the armature and yoke to the center bracket, making sure that the dowel pin enters its hole.

Install the brushes and brush holders.

210

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Group 30 Electrical System

NOTE! Install the positive (+) side brush and negative

(-) side brush as shown.

Install the rear bracket to the yoke by aligning the matching marks. Secure the brush holders with bolts, then tighten the through bolts.

Measure the end play of the armature. If the end play exceeds the assembly standard, adjust it on the rear side.

Armature end play, mm [in.]

Assembly Standard ...

0.3–0.7 [0.012–0.028]

Liberally coat the internal gear with grease, then install the pinion shaft to the gear.

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211

Group 30 Electrical System

Measure the end play of the pinion shaft. If the end play exceeds the assembly standard, adjust it on the internal gear side.

Pinion shaft end play, mm [in.]

Assembly Standard ...

0.2–0.8 [0.008–0.031]

Install the magnetic switch. Apply a voltage of 24 volts between the C and E terminals. Connect the lead wire and energize the circuit between the M and E terminals (within 1 setond). After the pinion has shifted, measure retraction length of the pinion. If the measurement is not within 2.5 to 5.5

mm CO.098 to 0.22 in.], use the magnetic switch adjusting screw to make adjustments.

10. Secure the lead wire.

11. Install the safety switch.

212

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Alternator

Group 30 Electrical System

Disassembly

Nut, washer

Pulley assembly

Set screw

Front bracket assembly

Rotor assembly

Field coil

Stator

Rear bracket

Regulator assembly

10. Rectifier assembly

11. Terminal assembly

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213

Group 30 Electrical System

Inspection and repair

Stator

Testing the stator coil for open circuits

If there is no continuity among the three lead wires, replace the stator.

Testing the stator coil for grounding

If there is continuity between the coil and core, replace the stator.

Field coil

Measure resistance between the terminals of the field coil. If the measured resistance deviates from the standard value, replace the coil.

Field coil resistance,

Ω

Assembly Standard ...

7.3–8.6

Inspecting rectifier

To check individual diodes, measure resistance between the diode lead wire and heat sink. Connect the positive (+) test lead wire to the diode and measure resistance. Then, connect the negative (-) test lead wire to the diode and measure resistance again. If both measured values are close to 0 (zero), the circuit is shorted.

NOTE! If the diode has an open circuit or is shorted, it is defective, and the rectifier must be replaced.

Reassembly

Reassembly sequence

8 9 10 11

4 5

WARNING! The alternator requires no grease.

Keep the bearing box free of oil and grease since oil and grease can cause creeping of the bearing on the rear side.

WARNING! Heat the bearing box of the rear bracket for assembly.

214

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User manual | 7742852-VOLVO-PENTA-DBMOTEURS-DB

Workshop Manual

Marine Engines

D49A MS/MT

Contents

Safety Information

Introduction

Important

Warning labels D49A MS

Warning labels D49A MT

General Information

About the Workshop Manual

Spare parts

Certified engines

Repair instructions

Our joint responsibility

How to Use This Manual

Terms used in this manual

Disassembly and Reassembly

Oil Seals

O-rings

Bearings

Lock Plates

Split Pins and Spring Pins

Presentation D49 MS

Presentation D49 MT

Identification numbers D49A

Specification D49A MS & MT

General specification

Engine main parts

Fuel system

Fuel system cont.

Oil system

Cooling system

Inlet and exhaust system

Electrical system

Maintenance Standards Table

General

Engine main parts

Valves

Valve push rods

Valve springs

Rockers

Cylinder liners

Pistons and cylinderheads

Pistons

Piston rings

Piston pins

Connecting rods

Connecting rod bearings

Oil pump drive

Flywheel

Injection pump accessory drive

Damper

Front gears

Timing gears

Camshaft

Crankshaft

Main bearing

Crankcase

Inlet and exhaust system

Turbocharger TD13 (only on D49 MS)

Turbocharger TD15

Lubrication system

Oil Pump

Safety valve

Relief valve

Oil thermostat

Piston cooling nozzle

Cooling system

Fresh water pump

Thermostat

Sea water pump

Fuel system

Fuel injector

Injection pump

Feed pump

PSG governor drive

Electric system

Starter