HYDRAULIC HAMMER

OPERATORS MANUAL

GH SERIES HAMMERS

GH9 GH15

GH10 GH18

GH12 GH30

"Use Genuine NPK Parts”

7550 Independence Drive

Walton Hills, OH 44146-5541

Phone (440) 232-7900

Toll-free (800) 225-4379

Fax (440) 232-6294

© Copyright 2007 NPK Construction Equipment, Inc. www.npkce.com

H050-9630B 08-07 08/07

NPK

CONTENTS

SAFETY .......................................................................................................................... 2

INTRODUCTION............................................................................................................. 4

CARRIER MACHINE COMPATIBILITY .......................................................................... 4

HAMMER SPECIFICATIONS ......................................................................................... 5

HYDRAULIC INSTALLATION ......................................................................................... 6

PREVENTION OF CONTAMINATION ........................................................................ 7

HYDRAULIC QUICK DISCONNECTS ........................................................................ 8

MOUNTING INSTALLATION ........................................................................................ 10

MOUNTING TO THE CARRIER................................................................................ 11

REMOVAL FROM THE CARRIER ............................................................................ 11

LUBRICATION .............................................................................................................. 12

GREASING PROCEDURE ....................................................................................... 12

CORRECT GREASE AND GREASE INTERVALS .................................................... 13

NPK HAMMER GREASE ..................................................................................... 15

AUTOLUBE SYSTEMS............................................................................................. 15

LUBRICANT TERMS AND DEFINITIONS................................................................. 16

START-UP OPERATION .............................................................................................. 18

HAMMERS THAT ARE NEW, REBUILT, OR HAVE BEEN INACTIVE ...................... 18

BEFORE STARTING THE HAMMER........................................................................ 19

DAILY START-UP PROCEDURE ............................................................................. 19

OPERATION ................................................................................................................. 20

SAFE OPERATING INSTRUCTIONS ....................................................................... 20

OPERATING TECHNIQUES & PRECAUTIONS ....................................................... 21

ROUTINE INSPECTION AND MAINTENANCE............................................................ 26

TWENTY HOUR INSPECTION..................................................................................... 27

GAS CHARGE .............................................................................................................. 28

NITROGEN GAS PRESSURE .................................................................................. 28

GAS CHARGING KIT................................................................................................ 28

CHECKING THE GAS PRESSURE .......................................................................... 29

CHARGING THE HAMMER ...................................................................................... 30

DISCHARGING THE GAS PRESSURE .................................................................... 31

TOOLS .......................................................................................................................... 32

STANDARD TOOLS ................................................................................................. 32

CHANGING THE TOOL ............................................................................................ 33

TOOL INSPECTION ................................................................................................. 34

MAXIMUM TOOL TO TOOL BUSHING CLEARANCE .............................................. 35

RETAINING PIN............................................................................................................ 37

TIE RODS ..................................................................................................................... 38

TIE ROD TORQUE ................................................................................................... 38

HAMMER FASTENER TORQUE .................................................................................. 39

STORAGE OF HYDRAULIC HAMMER ........................................................................ 40

NOTES AND RECORDS .............................................................................................. 41

- 1 -

NPK

SAFETY

Safety notices in NPK Instruction Manuals follow ISO and ANSI standards for safety warnings:

DANGER (red) notices indicate an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING (orange) notices indicate a potentially hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION (yellow) notices indicate a potentially hazardous situation, which, if not avoided, may result in minor or moderate injury.

ATTENTION (blue) notices in NPK Instruction Manuals are an NPK standard to alert the reader to situations which, if not avoided, could

result in equipment damage.

WARNING and BASIC OPERATING INSTRUCTIONS decals are included with each

NPK hammer and installation kit. Decals must be installed in the cab, visible to the operator while operating the hammer.

STAY CLEAR, PRESSURE VESSEL, GAS PRESSURE and TOOL SHARPENING decals are installed on all NPK hammer models. Keep them clean and visible. NPK will provide decals free of charge as needed.

1. Operator and Service personnel must read and understand the NPK INSTRUCTION

MANUALS to prevent serious or fatal injury.

2. FLYING DEBRIS CAN CAUSE SERIOUS OR FATAL INJURY.

• Keep personnel and bystanders clear of hammer while in operation.

• Do not operate HAMMER without an impact resistant guard between HAMMER and operator. NPK recommends LEXAN

 or equivalent material, or steel mesh.

Some carrier manufacturers offer demolition guards for their machine. Check with the carrier manufacturer for availability. If not available, please call NPK.

3. Do not hardface or sharpen the tool point with a cutting torch. Excessive heat from torching or welding can cause embrittlement, breakage, and flying pieces. Resharpen by milling or grinding only, using sufficient coolant.

Warning Decal for Cab Installation

- 2 -

NPK

SAFETY, CONTINUED

4. Fully extend the tool while charging the HAMMER with nitrogen gas. Be sure that the retaining pin is installed. STAY CLEAR OF TOOL POINT WHILE CHARGING.

5. Do not disassemble a HAMMER before discharging the hammer gas pre-charge.

6. USE NITROGEN GAS ONLY! Store and handle nitrogen tanks per OSHA regulations.

7. Avoid high pressure fluids. Escaping fluid under pressure can penetrate the skin causing serious injury. Relieve pressure before disconnecting hydraulic or other lines.

8. Operate HAMMER from operator’s seat only.

9. Match HAMMER size to carrier according to NPK recommendations. The carrier must be stable during hammer operation and during transport.

See CARRIER MACHINE COMPATIBILITY section of the NPK Service Manual.

10. Do not make any alterations to the TOOL without authorization from NPK

Engineering.

11. Use proper lifting equipment and tools when handling or servicing the HAMMER.

12. Wear ear protection and safety glasses when operating the hammer. Consult

OSHA/MSHA regulations when applicable.

13. Beware of flying metal pieces when driving Boom Pins.

14. Do not alter the HAMMER without authorization from NPK Engineering!

15. Use only genuine NPK replacement parts. NPK specifically disclaims any responsibility for any damage or injury that results from the use of any tool or parts not sold or approved by NPK.

For further safety information, consult the AEM Hydraulic Mounted Breakers Safety

Manual, AEM form MB-140 (NPK P/N H050-9600), which is furnished with every NPK hammer. To request an additional copy, please contact NPK at 800-225-4379 or

Internet at www.npkce.com.

- 3 -

NPK

INTRODUCTION

NPK is a leading manufacturer of boom mounted HYDRAULIC HAMMERS, and has the most complete product line available anywhere. The success of NPK is due to our commitment to quality, dependability and long life. The HYDRAULIC HAMMER has many unique designed features and it is a company philosophy that the NPK

HYDRAULIC HAMMER can be brought to "like new” condition long after competitive products are scrapped. You can feel confident that you have purchased the best value available.

This comprehensive manual contains instructions for operating and maintaining NPK

HYDRAULIC HAMMERS. This manual includes helpful information for obtaining the full potential and efficiency from NPK HYDRAULIC HAMMERS. Please read this manual thoroughly to understand the NPK HAMMER and its operating principles before using it.

For additional information or help with any problem encountered, please contact your

NPK authorized dealer.

Whenever repair or replacement of component parts is required, only NPK parts should be used. NPK is not responsible for failures resulting from substitution of parts not sold or approved by NPK.

CARRIER MACHINE COMPATIBILITY

These carrier weight ranges are intended as a guideline only. Other factors, such as stick length, counterweights, undercarriage, etc., must be taken into consideration.

Mounting a HAMMER that is too heavy for the carrier machine can be dangerous and can damage the carrier. Verify carrier stability with HAMMER before transport or operation.

Mounting a HAMMER that is too small for the carrier machine can damage the

HAMMER, cause tool breakage and void Warranties. Please consult NPK Engineering for specific detailed information.

CARRIER WEIGHT lbs. (kg)

HAMMER RECOMMENDED CARRIER WEIGHT RANGE

MODEL (lb) (kg)

GH9 40,000 - 56,000 18,000 - 25,000

GH10

GH12

GH15

46,000 - 66,000

56,000 - 86,000

66,000 - 100,000

GH18 70,000 - 114,000

GH30 100,000 - 186,000

Specifications subject to change without notice.

20,000 - 30,000

25,000 - 38,000

30,000 - 45,000

32,000 - 52,000

45,000 - 85,000

- 4 -

HAMMER SPECIFICATIONS

HAMMER

MODEL

GH9

IMPACT

ENERGY

CLASS ft lb

3000

FREQUENCY WORKING

WEIGHT bpm

500 - 670

lbs (Kg)

TOOL

DIA WORKING

LENGTH in (mm) in (mm)

3600 (1635) 4.96 (126) 24 (608)

NPK

GH10

GH12

GH15

GH18

4000

5500

8000

12000

400 - 550

380 - 480

320 - 400

300 - 400

4200 (1900) 5.35 (136) 24.5 (620)

5650 (2565) 5.75 (146) 25.5 (650)

6800 (3085) 6.14 (156) 27 (690)

7800 (3540) 6.50 (165) 29 (740)

GH30

HAMMER

MODEL

GH9

15000 310 - 390

OIL FLOW gpm (L/min)

40 - 53 (150 - 200)

13500 (6125)

HYDRAULIC

OPERATING

PRESSURE psi (bar)

1

7.2 (184) 32 (815)

CIRCUIT

RELIEF minimum

2

GAS CHARGE

PRESSURE

Cold

3

5 psi (bar) psi (bar) psi (bar)

2600 (180) 3100 (215) 365 (25)

420 (29)

GH10

44 - 55 (165 - 210) 2600 (180) 3100 (215) 365 (25) 420 (29)

GH12

45 - 58 (170 - 220) 2650 (183) 3150 (217) 365 (25)

420 (29)

GH15

53 - 66 (200 - 250) 2600 (180) 3100 (215) 365 (25) 420 (29)

GH18 58 - 77 (220 - 290) 2500 (172) 3000 (207) 365 (25)

420 (29)

GH30

74 - 92 (280 - 350) 2600 (180) 3100 (215) 390 (27)

450 (31)

*Specifications subject to change without notice.

NOTES:

1. Hydraulic operating pressure maximum is inlet pressure at the hammer with the oil at operating temperature and with the gas charge set at the hot operating pressure.

See CHECKING THE HYDRAULIC PRESSURES section in Service Manual.

2. Circuit relief pressure is at least 500 psi (35 bar) above hammer operating pressure.

3. Cold gas charge is the initial set with the hammer at ambient temperature.

4. Hot gas charge is checked after 1 to 2 hours of running and with a system oil temperature of

140° to 180°F (60° to 80°C). This is the preferred check.

5. Pressures listed are maximum. Use tolerance of minus 25 psi (2 bar).

- 5 -

NPK

HYDRAULIC INSTALLATION

NPK INSTALLATION KITS are available for virtually all compatible backhoe loaders, excavators, and skid steers. Complete parts and instructions for the hydraulic installation of the NPK HYDRAULIC HAMMER including valving and/or controls, hoses and fittings, accumulators, boom and stick tubing, and clamps are provided.

HAMMER LINES

Typically, the pressure line is arranged on the left side of the boom and the return line on the right side. Flow to the hammer is controlled from an auxiliary valve on the carrier or from an NPK supplied valve. Hydraulic oil is routed back to the tank through the carrier’s oil cooler and filter.

ACCUMULATORS

General guideline requirements.

MODEL

GH9, GH10, GH12

GH15, GH18, GH30

Pressure Line

Accumulator

1*

1*

Return Line

Accumulator

1

2

* For gear pump machines only.

* Some installations may have special requirements.

HAMMER CONTROL VALVE

NPK uses two general types of control systems, depending upon the carrier model:

1. CONTROL SYSTEM USING CARRIER AUXILIARY OR SPARE VALVE SECTION.

This type of installation utilizes an existing carrier valve. Any additional parts, such as a mechanical linkage, hydraulic pilot control valve, flow control valves, etc., are furnished in the NPK HYDRAULIC INSTALLATION KIT. Special hydraulic pressure control valves are not required. The NPK HYDRAULIC HAMMER operating pressure is self-regulating.

2. CONTROL SYSTEM USING THE NPK MULTIVALVE.

For carriers not equipped with a suitable auxiliary or spare valve section, the NPK

HYDRAULIC INSTALLATION KIT includes a solenoid operated, priority flow control valve to operate the NPK HYDRAULIC HAMMER. The NPK MULTIVALVE is specifically designed for the operation of boom mounted attachments.

- 6 -

NPK

HYDRAULIC INSTALLATION, CONTINUED

ATTENTION

PREVENTION OF CONTAMINATION

1. A hydraulic hammer is harder on oil than using a bucket, so the oil is apt to deteriorate and breakdown sooner. Neglect of the hydraulic oil can not only damage the hydraulic hammer but also cause problems in the carrier, which could result in damaged components. Care should be taken to check for contamination of the oil and to change it if it is found contaminated. Oil sampling at regular intervals is

highly recommended.

™ When the hydraulic oil shows low viscosity and bubbles, this indicates that the oil is deteriorated. If the oil is dark brown and gives off an offensive odor, it is severely deteriorated. Change the oil immediately!

™ When the oil is clouded, or the oil filter has become clogged, it indicates that the oil is contaminated. Change the oil immediately!

™ To change the contaminated hydraulic oil, drain the hydraulic system completely and clean components. Do not mix new oil with the old.

2. Do not allow any contamination to mix with the oil. Take special care in preventing contamination from entering the hydraulic system through the hose or tube connection when changing the hydraulic hammer with the bucket.

3. Low oil level will cause heat build-up, resulting in deterioration of the oil. Also, it may cause cavitation due to air mixing with the oil, leading to a damaged hydraulic hammer and carrier components. Keep the oil at the proper level at all times.

4. Do not use the hydraulic hammer at an operating temperature higher than 180°F

(80°C). The proper operating oil temperature range is between 120°F (50°C) and

180°F (80°C). Since clogged cooler fins causes reduced efficiency of the cooler, keep the cooler fins clean at all times. Check the hydraulic oil cooling system to be sure it is working effectively. The use of a heat gun is the best way to evaluate if the cooler is working properly.

5. Water in the hydraulic oil will lead to damage of the hydraulic hammer and carrier.

Drain off water and foreign matter from the hydraulic tank at specified intervals.

When out of service, the hydraulic hammer should be stored indoors.

CHANGING THE FILTER ELEMENT AND HYDRAULIC OIL

Change the filter element and hydraulic oil at the intervals described in the operation manual of the excavator when using a hydraulic implement. Another method is to set up an oil sampling schedule and change accordingly.

- 7 -

NPK

HYDRAULIC INSTALLATION, CONTINUED

HYDRAULIC QUICK DISCONNECTS

NPK recommends against the use of non-NPK quick disconnects on hydraulic circuits operating NPK Products.

1. The hydraulic pulsations caused by hydraulic hammer operating can cause internal pieces of non-NPK quick disconnects to disintegrate. These pieces would migrate into the hammer, causing damage.

2. If quick disconnects are used when the hammer is removed from the excavator, the quick disconnects should be capped to keep them clean. If this is not done, contamination on the disconnect will be flushed into the hammer when re-connected.

This, again, can cause damage.

3. Most quick disconnects create a restriction in the circuit. NPK Hammers are not back pressure sensitive, but restrictions cause unnecessary heating of the oil. Also, the pressure required to operate the hammer, plus the restriction of the disconnects may push an older, low pressure, carrier machine to the limit of its hydraulic system.

This would interfere with proper hammer operation. However, the NPK approved

quick disconnects are properly sized so that the hammer operation is not

affected.

APPROVED CONNECTION (A) Non-NPK Quick Disconnects (B)

NPK APPROVED CONNECTION QUICK DISCONNECTS

CONTACT YOUR NPK DEALER FOR ADDITIONAL INFORMATION ABOUT

NPK QUICK DISCONNECTS

- 8 -

NPK

HYDRAULIC INSTALLATION, CONTINUED

HYDRAULIC QUICK DISCONNECTS

If hydraulic quick disconnects are used with the NPK Hammer, it is recommended that the following precautions be followed.

1. Periodic inspection of both male and female ends (A) is recommended to ensure the couplers are in good working condition. Failure to inspect couplers may result in pieces from a damaged or failed coupler to migrate into the hammer or parts of the coupler returned to the machine.

2. Check for dirt, dust, and debris on both couplers before coupling.

3. Be sure that the couplers are completely seated together (B).

4. For most non-NPK couplers, be sure that couplers are replaced as a set, male and female. Do not use one new end and one used end.

- 9 -

NPK

MOUNTING INSTALLATION

NPK Mounting Installation Kits include the parts required to adapt the NPK HYDRAULIC

HAMMER to the carrier. NPK mounting kits include the hammer mounting bracket (A), flow control valve (if required), and hoses to connect to the carrier hydraulic system.

ITEM DESCRIPTION

D FITTINGS

E BOLTS

F

G

PINS (IF REQUIRED) (NOT SHOWN)

BUSHINGS (IF REQUIRED) (NOT SHOWN)

Refer to HAMMER FASTENER TORQUE section for Top Bracket bolt torque.

Refer to NPK Installation Kit Manual for additional information.

- 10 -

NPK

MOUNTING INSTALLATION, CONTINUED

MOUNTING TO THE CARRIER

1. Place the hammer horizontal on wood blocks, as shown.

2. Align the boom pin holes. Install the stick pin (C) before the cylinder link pin (D).

3. Clean away any dirt found on the hose connections and connect hoses (E). Pressure line is on left, return line on right side of boom.

4. Open shut-off valves (F).

REMOVAL FROM THE CARRIER

ATTENTION

The hydraulic lines must be handled carefully and sealed to prevent contamination from entering the hammer or the carrier hydraulic system.

ATTENTION

The tool end of the hammer should be set lower than the head end to prevent moisture from entering the hammer through the tool area.

1.

Close pressure and return line shutoff valves (A).

2.

Disconnect the hydraulic hoses (B) before laying the hammer down.

Avoid getting hydraulic oil on rubber mounts (C). Flush with water if necessary.

3.

Cap the pressure and return lines on the carrier (D) and connect the hammer whip hoses as shown.

4. Position the hammer horizontal on wood blocks and remove the boom pins.

- 11 -

NPK

LUBRICATION

GREASING PROCEDURE

Manual greasing for hammers without AUTOLUBE system

IMPORTANT:

1. The hammer must be in a vertical position with downforce applied to push the tool all the way in. This prevents grease from entering piston impact area.

2. Turn the machine off.

3. Grease the hammer until grease begins to come out around the tool and lower bushing.

APPLY DOWNFORCE TO PUSH TOOL UP INTO HAMMER

NOTE: USE A GOOD QUALITY EP #2 LITHIUM BASED GREASE WITH WEAR

INHIBITING ADDITIVES, SEE PAGES 13, 14, AND 15.

- 12 -

NPK

LUBRICATION, CONTINUED

CORRECT GREASE AND GREASE INTERVALS

Proper hammer maintenance requires a sufficient supply of the correct grease to the tool (chisel). The tool must be pressed against a hard surface until it stops up inside the hammer. This prevents grease from entering piston impact area and ensures proper distribution of grease between the tool and tool bushings.

GREASE INTERVALS

If the hammer is not connected to an Autolube system, see page 15, the hammer must be greased at regular intervals to get the best life from the tool and tool bushings.

There are two ways to determine grease intervals:

First, grease the hammer at the beginning of the job until grease comes out between the tool and the lower tool bushing. Run the hammer until the shank of the tool starts to look dry. This determines the time interval for the greasing of this particular hammer on this particular job. Typically, this is 1 to 4 hours. Also, note the amount of grease needed to re-grease the tool. This gives you the amount of grease and how often it must be applied. An example would be that a particular hammer, on a particular job, requires half a tube of grease every 3 hours. This would be the greasing schedule you would set up. If this hammer was moved to another job, another grease schedule may have to be determined.

Second, if you can’t control the grease schedule, such as rental units, then have the operator grease the hammer once every hour of hammer operation. Again, grease the hammer until grease comes out between the tool and tool bushing. This is usually more often than required, but is far cheaper than replacing prematurely worn tools and tool bushings.

CORRECT GREASE

The type of grease used is very important. NPK recommends a lithium soap base EP

(Extreme Pressure) NLGI #2 Grease, with Moly (Molybdenum Disulfide) or other surface protecting additives. A high drop point 500° F (260° C) grease is desirable.

On the following page is a list of commonly available greases, by manufacturer and brand name that meet NPK’s recommendations. NPK does not endorse any one brand as being superior to another. If you or your customers use a brand not listed, please call the NPK Service Department at 800-225-4379.

- 13 -

NPK

LUBRICATION, CONTINUED

CORRECT GREASE FOR HYDRAULIC HAMMERS, continued

MANUFACTURER

BRAND NAME

Amalie Oil Co. LI-2M

Amoco

Amsoil, Inc.

BP Oil, Inc.

Caterpillar

Cato Oil and Grease Company

CITGO

Conoco, Inc.

Dryden Oil Company

Rykotac EP Grease

Amolith Grease 94601

Rykon Premium Grease EP (Grade 94108)

Rykon Premium Moly Grease (Grade 94114)

Amoco Molylith Grease 92006

GHD

Bearing Gard-2

Multipurpose

Molydbenum Grease (MPGM)

Moly Lithflex CX AS

Citgo Extra Range Grease

Super Lube M EP #2

Moly EP 2

Exxon Ronex Extra Duty Moly NLGI 2

Fiske Brothers Refining Co. (Lubriplate) MO-LITH No. 2

John Deere

Kendall

TY6333/TY6341 Moly High Temp

L-424

Mobil

Muscle Products Corporation (MPC)

NPK

Pennzoil

Moly 372

PL-10 Powerlift Grease

LP-10 Lithium EP Plus

Universal Plus Lithium EP Grease

Super Duty EP Grease (water resistant)

Chisel Paste

Adhezolith

EP 2 Grease

Philube MW Phillips 66 Company

Shell

Standard Oil Company

Sun Refining & Marketing Company

Texaco, U.S.A.

Union Oil Company

Unocal

Retinax ®

AM Grease 71119

Retinax ® HD Grease

Bearing Gard-2

Prestige Moly 2 EP

Molytex EP 2

Unoba Moly HD #2

Unoba Moly HD #2

- 14 -

NPK

LUBRICATION, CONTINUED

CORRECT GREASE FOR HYDRAULIC HAMMERS, continued

NPK HAMMER GREASE

NPK now offers hammer grease specially formulated to meet severe job requirements.

The grease is available in three different temperature ranges - 350°, 500°, and 2000°.

All are compatible with Autolube systems.

Universal Plus and Super Duty are lithium soap based products that resists washout and contain NPK-10 additive for surface protection in friction effected areas.

Chisel Paste is an aluminum complex soap base with 12% graphite and copper additives for extreme operating conditions.

UNIVERSAL PLUS

350 deg

NPK PART

NO.

14 OZ. CARTRIDGE G000-1010

120 LB. KEG

35 LB. PAIL

G000-1020

G000-1030

400

LB

. DRUM G000-1040

SUPER DUTY

500 deg

NPK PART

NO.

14 OZ. CARTRIDGE G000-1011

120 LB. KEG

35 LB. PAIL

400 LB. DRUM

CHISEL PASTE

2000 deg

G000-1021

G000-1031

G000-1041

NPK PART

NO.

14 OZ. CARTRIDGE G000-1050

AUTOLUBE SYSTEMS

An automatic greasing system is recommended to reduce hammer tool and tool bushing wear. The NPK AUTOLUBE System is designed to automatically provide a continuous supply of grease to the hammer tool and tool bushing – increasing tool and tool bushing life by reducing wear. The

AUTOLUBE pump is capable of pumping EP2 grease in cold weather. The pump output is adjustable according to the requirements of the hammer model and to compensate for tool bushing wear.

NPK GH series hammer models have a connection port (A) for an automatic greasing system. Refer to the NPK AUTOLUBE Instruction Manual for details.

- 15 -

NPK

LUBRICATION, CONTINUED

LUBRICANT TERMS AND DEFINITIONS

ADHESIVE

TERM DEFINITION

The ability of grease, gear lubricant or oil to cling to metal.

ANTI WEAR AGENTS

COHESIVE

Used to help combat metal-to-metal contact, thus reducing wear.

The ability of grease, gear lube or oil to cling to itself, thus resisting tearing apart.

CONSISTENCY

CONTAMINATION

DROPPING POINT

EXTREME PRESSURE

AGENTS

FILM STRENGTH

Consistency of grease is its hardness or firmness. It is determined by the depth in millimeters to which the cone of a penotrometer sinks into a sample under specified conditions. Consistency of grease may be influenced by the type and amount of thickener, viscosity of oil, working and other factors.

Foreign material that could damage a part.

The minimum temperature at which the oil in a grease subjected to heat begins to actually drip and breakdown.

Additives that under extreme pressure form an adherent film on metal surfaces, thus forming a film of protection.

FRICTION

GALLING

LUBRICATION

NLGI

OILINESS

PUMP

Film strength is defined as the tendency of oil molecules to cling together. It is the ability of those molecules to resist separation under pressure between two metals and to hold these metal surfaces apart.

The resistance to fluid flow in a hydraulic system. (An energy loss in terms of power output.)

Surface damage on mating, moving metal parts due to friction. A severe form of adhesive wear.

Use of a substance (grease, oil, etc.) to reduce friction between parts or objects that move against each other.

A rating given to a grease from the National Lubricating

Grease Institute. This rating determines the hardness of the grease and goes on from a 000 to a 6 rating. Most greases are NLGI #2 rated.

Oiliness is measured of the coefficient of friction of a lubricant. Oiliness or lubricity depends on the adhering characteristics of an oil. It is determined by the attraction between the molecules of the oil and the molecules of another material. Of two oils having the same viscosity but different degrees of fluid friction, the one with the lower friction index has the higher degree of oiliness.

A device which converts mechanical force into hydraulic fluid power. Basic design types are gear, vane, and piston units.

- 16 -

NPK

LUBRICATION, CONTINUED

LUBRICANT TERMS AND DEFINITIONS, continued

TERM DEFINITION

RESERVOIR

A container for keeping a supply of working fluid in a hydraulic system.

VIBRATION

VISCOSITY

A quivering or trembling motion.

Is the actual SAE weight of the product. Example motor oils come in 10, 20, 30, 40, 50 and 15/40 SAE weight.

The viscosity designation of a lubricant indicates its internal resistance to flow.

- 17 -

NPK

START-UP OPERATION

ATTENTION

HAMMERS THAT ARE NEW, REBUILT, OR

HAVE BEEN INACTIVE

Before using a new hammer for the first time, the first time after rebuild, or a hammer that has been inactive for a long period of time:

1. Check the nitrogen gas pressure.

The nitrogen gas pre-charge is factory checked before shipment. However, it is recommended the pressure be checked before using the NPK hydraulic hammer for the first time. See CHECKING THE GAS PRESSURE section for procedure.

2. At idle, raise the hammer off of the ground. Place hammer vertical and activate the hammer circuit for 3 – 5 second intervals. Continue for an additional 3 – 4 times to ensure that all the air has been purged from the hoses and hammer before first use. Failure to do this could result in damage to internal components.

3. Place hammer firmly against material to be broken.

Operate the hammer in a vertical position for approximately 10 minutes at one-half engine speed. Increase engine speed to three-quarters and continue operating at this speed for another 10 to 20 minutes. Increase to full engine speed. Maintain vertical position for the first hour of operation.

- 18 -

NPK

START-UP OPERATION, CONTINUED

ATTENTION

BEFORE STARTING THE HAMMER

PRE-OPERATION INSPECTION AND WARM UP

Before operating the NPK hydraulic hammer, be sure to perform the specified routine inspection in the ROUTINE INSPECTION AND MAINTENANCE section of this manual.

Warm up the NPK hydraulic hammer, see below, and the carrier machine in accordance with the machine manufacturer’s instruction manual. This is especially important during cold weather operation.

DAILY START-UP PROCEDURE

Operate the NPK hydraulic hammer in the vertical position, at 1/2 engine throttle setting, for about 1-2 minutes. During this period, inspect the NPK hydraulic hammer and installation kit for leaks or loose connections.

Do not operate on a slanted surface during the start-up operation.

- 19 -

NPK

OPERATION

SAFE OPERATING INSTRUCTIONS

DO NOT OPERATE THE HAMMER WITHOUT AN IMPACT RESISTANT

CAB WINDOW OR SHIELD IN PLACE

BEWARE OF FLYING DEBRIS FROM THE HAMMER TOOL POINT

An impact resistant cab window or shield must be in place to protect the operator.

DO NOT USE THE HAMMER AS

A HOIST

The hammer is not intended to lift an object. To do so, can be dangerous.

DO NOT TOUCH HOT TOOL

AFTER USING

!

- 20 -

NPK

OPERATION, CONTINUED

ATTENTION

OPERATING TECHNIQUES & PRECAUTIONS

PRELOAD THE TOOL BEFORE

STARTING

Press the tip of the demolition tool vertically against the object to be broken.

Be sure the object is stable before activating the NPK HYDRAULIC

HAMMER.

APPLY DOWNFORCE ON THE

TOOL

Raise the front of the machine slightly (A) by applying downforce on the demolition tool.

Press the control lever or the foot pedal to start the NPK HYDRAULIC HAMMER.

Applying excessive force to the hammer will raise the carrier too high and jolt the operator when the material breaks. Let the NPK HYDRAULIC

HAMMER do the work.

AVOID BLANK HAMMERING

As soon as the material is broken, release the control lever or pedal to prevent unnecessary blank hammering.

Blank hammering is continued hammer operation after the material is broken. This will overheat the hydraulic system and cause undue

wear.

- 21 -

NPK

OPERATION, CONTINUED

ATTENTION

OPERATING TECHNIQUES & PRECAUTIONS

DO NOT SLANT HAMMER

For the most efficient demolition, align the direction of force (F) from the boom with the penetration direction (P) of the tool. Failure to do this decreases the transfer of energy from the piston to the rock and increases the bending forces at the fulcrum of the tool.

This unnecessary added stress leads to the following problems:

1. Premature bushing wear and/or tool breakage.

2. Breakage of tie rods.

3. Breakage of bracket bolts.

4. Decrease in transfer of energy translates to reduced production.

When the tool binds from incorrect working angle, the sound of the hammer changes.

Keep the boom direction of force in the same direction the tool is penetrating (A). Use the boom cylinder to preload the hammer

(apply downforce), and use the bucket and stick cylinders for alignment. Keep the tool tangent to the arc of the boom (B).

- 22 -

OPERATION, CONTINUED

ATTENTION

OPERATING TECHNIQUES & PRECAUTIONS

DO NOT USE THE HAMMER

TOOL AS A PRY BAR

Excessive prying can cause premature bushing wear and tool or tie rod breakage. When hammering materials that allow the tool to penetrate before breaking, move the hammer slightly fore and aft to create a cone-shaped hole. The vented hole allows trapped dust and heat to escape, increases the tool penetration rate into the material, and prevents overheating the tool tip.

DO NOT HAMMER CONTINU-

OUSLY IN THE SAME

POSITION FOR MORE THAN

30 SECONDS

If the tool cannot break or penetrate into the material after hammering in the same position for 30 seconds, change the working location.

Hammering in the same position for a long time will reduce the working efficiency, increase the hydraulic oil temperature, overheat the tool tip and accelerate tool wear.

ALWAYS WORK BY

BREAKING TO A FREE FACE

The material must have somewhere to break to. Start at an edge.

NPK

- 23 -

OPERATION, CONTINUED

ATTENTION

OPERATING TECHNIQUES & PRECAUTIONS

DO NOT DROP THE HAMMER

RAPIDLY ON AN OBJECT

Remember, the hydraulic hammer is heavier than an empty bucket and will move faster than expected.

NPK

DO NOT USE THE HAMMER

OR BRACKET TO MOVE

LARGE OBJECTS

Do not use the hammer bracket for purposes other than for what is was intended.

AVOID OPERATING THE

HAMMER WITH CYLINDERS

AT THE END OF STROKE

Continuous operation with the boom cylinders fully retracted or extended may damage the hydraulic cylinders.

- 24 -

OPERATION, CONTINUED

ATTENTION

OPERATING TECHNIQUES & PRECAUTIONS

DO NOT OPERATE HAMMER

UNDERWATER UNLESS

HAMMER HAS BEEN MODIFIED

WITH UNDERWATER KIT

Do not allow parts, other than the tool, to be submerged in water. Underwater operation will damage the hammer and allow water to enter the hydraulic system. The hammer can be modified for underwater operation - contact NPK at 800-225-4379 for more information.

DO NOT SUBMERGE A HOT

TOOL IN WATER

!

The tip of the tool may be hot from operation. Submerging in water can cause the tip of the tool to become brittle and break prematurely.

NPK

DO NOT ALLOW THE HAMMER

TOOL TO HIT THE BOOM

Use caution when tucking the hammer in tight to the boom for transportation.

- 25 -

NPK

ROUTINE INSPECTION AND MAINTENANCE

1. VISUAL INSPECTION

Detect a potential problem early.

FASTENERS

Inspect all fasteners. Retighten as necessary. Refer to HAMMER FASTENER

TORQUE section, page 39, for Top Bracket bolt torque.

WELDS

Check for cracks, repair as necessary.

HOSES AND TUBING

Check for oil leaks, loose clamps and hose abrasion.

HYDRAULIC OIL

MAINTAIN A CLEAN HYDRAULIC SYSTEM

If non-petroleum oil is used, contact NPK Service Department for compatibility.

Keep hoses clean and capped when dismounting or storing hammer.

Change oil and filters as recommended by carrier manufacturer. Periodic oil

sampling is recommended.

2. DEMOLITION TOOL LUBRICATION

Important: It is imperative that grease is maintained in the tool bushing contact area at all times. This may require hourly greasing depending on job conditions.

Important: The hammer must be in a vertical position with downforce applied to push the tool all the way in. This prevents grease from entering piston impact area. Pump

grease into hammer until grease is seen coming out

between the tool and bushing.

Use a good quality, high temperature EP#2 grease containing anti-wear additives, see LUBRICATION section.

If machine is equipped with an AUTOLUBE System, check grease reservoir daily.

3. TOOL and TOOL BUSHING WEAR

Check the tool and tool bushings for damage, wear or deformation on a regular weekly basis. Replace the tool and/or bushings when wear exceeds the maximum clearance limit, see MAXIMUM TOOL TO TOOL BUSHING CLEARANCE section, page 35.

Do not hardface or sharpen the tool point with a cutting torch. Excessive heat from torching or welding causes embrittlement, breakage, and flying pieces. Resharpen

only with a surface grinder or milling machine using sufficient cooling.

Please consult your authorized NPK Dealer or NPK Service Department for additional information.

- 26 -

NPK

TWENTY HOUR INSPECTION

1. WARRANTY REGISTRATION

Complete and send to NPK after initial 20 hour inspection.

2. WELDS

Check for cracks, repair as necessary. Consult your authorized NPK Dealer or

NPK Service Department for additional information.

3. TOOL RETAINING PIN

Remove the retaining pin and inspect for peening caused by excessive blank hammering. If necessary, grind edges smooth as shown in TOOL RETAINING PIN

INSPECTION section. The retaining pin must rotate freely.

4. DEMOLITION TOOL

Remove the demolition tool and inspect for peening caused by excessive blank hammering. If necessary, grind edges smooth as shown in TOOL INSPECTION, section.

5. GAS CHARGE

Check and adjust, if required, see GAS CHARGE section.

- 27 -

NPK

GAS CHARGE

NITROGEN GAS PRESSURE

The nitrogen gas pressure must be measured with no preload on the tool. Remove the tool; or position the hammer with the tool fully extended against the tool retaining pin.

The hammer must not be resting vertical on the tool. The gas pressure in the hammer will vary according to the gas temperature.

PREFERRED METHOD

The preferred method to measure or charge the nitrogen gas pressure is with the hydraulic system temperature stabilized at maximum operating temperature. The chart showing values for “Operating Temperature” should be used, see below.

ALTERNATE METHOD

The nitrogen gas pressure can be measured or charged at ambient temperature (cold), before operating the hammer. See the chart “Ambient Temperature” below.

ATTENTION

DO NOT OVERCHARGE THE HAMMER!

Exceeding the gas pre-charge specifications can result in damaging hammer components. The NPK WARRANTY does not cover failures resulting from exceeding the specified nitrogen gas pressure.

NITROGEN GAS PRE-CHARGE SPECIFICATIONS

MODEL

AT AMBIENT TEMPERATURE

(cold, before operating)

PSI (BAR)

(plus 0, minus 25)

GH9

AT OPERATING TEMPERATURE

PSI (BAR)

(plus 0, minus 25)

GH10

365 (25) 420 (29)

GH12

GH15

GH18

GH30 390 (27) 450 (31)

GAS CHARGING KIT

ALL NPK HYDRAULIC HAMMERS are furnished with the following gas charging kit. In addition, a nitrogen tank and pressure regulator valve (not furnished with the hammer) are required. These can be obtained from your local welding supply house. A regulator valve is available from NPK.

GAS CHARGE KIT (PART NO. 7300588)

1. HOSE (PART NO. 20118010)

2. PLUG (PART NO. 30102050)

(PART NO. 30604040)

4. CHARGING KIT BOX

(PART NO. 35001030)

5. CAP (PART NO. 30100500)

6. OPTIONAL REGULATOR VALVE

(PART NO. 21101050)

- 28 -

NPK

GAS CHARGE, CONTINUED

CHECKING THE GAS PRESSURE

Inspect the nitrogen gas pressure every 100 hours.

PROCEDURE

1. The gas pre-charge is measured with no preload on the tool. Remove the tool or position the hammer with the tool fully extended. THE HAMMER MUST NOT BE

RESTING ON THE POINT.

2. Remove the charge valve cap (A).

3. Turn the NPK charge adapter T-handle (A) full counterclockwise.

4. Install the NPK charge adapter (A) on the hammer charge valve

(B).

Remove the valve cap only, not the charge valve assembly!

5. Tighten the charge adapter cap (A). clockwise. As the Thandle (A) is screwed in, a resistance is encountered.

By turning the T-handle (A) further, the nitrogen gas pressure will be indicated on the pressure gauge (B).

Stop turning the T-handle

(A) when the gauge (B) reads pressure. Do not overtighten.

7. Compare the gauge pressure with the NITROGEN GAS PRE-CHARGE chart in the

NITROGEN GAS PRESSURE section

.

If the gas pressure is 25 psi (2 bar) or more below specification, proceed to NITROGEN GAS CHARGING PROCEDURE. If the pressure is correct, go to the next step.

8. Turn the T-handle counterclockwise until it stops as in step 3.

9. Slowly loosen the charge adapter cap to relieve the nitrogen gas pressure trapped in the charge valve.

10. Remove the charge adapter from the hammer charge valve.

11. Replace the charge valve cap on the charge valve.

- 29 -

NPK

GAS CHARGE, CONTINUED

CHARGING THE HAMMER

USE NITROGEN GAS ONLY

STAY CLEAR OF THE TOOL WHILE CHARGING

THE HAMMER WITH GAS. The tool may be

impacted by the piston and forced out abruptly.

PROCEDURE

1. Carry out steps 1 thru 4 of CHECKING THE

GAS PRESSURE.

2. Remove the cap from the charge adapter.

Remove the valve cap only, not the charge valve assembly!

Install a pressure regulator (A) on a

4. Connect a hose (D) from the pressure regulator (A) tank of nitrogen gas

(B). on the nitrogen tank (B) to the charge adapter (C).

5. Turn the T-handle (E) on the charge adapter (C) clockwise.

6. Turn the handle on the tank regulator (A) counterclockwise to full closed.

7. Open the valve (B) on the nitrogen tank (C) by turning the handle counterclockwise.

8. Slowly adjust the regulator on the nitrogen tank to the correct pressure by turning clockwise. Refer to NITROGEN GAS

PRE-CHARGE chart in the NITROGEN GAS PRESSURE section.

9. Charge nitrogen gas (see gas charge decal (E) until the pressure gauge (A) on the charge adapter (B) is at the correct setting, then turn the T-handle (C) counterclockwise all the way out.

10. Close the nitrogen tank valve and then remove the hose (D) from the charge adapter.

Nitrogen gas may be trapped in the hose. Loosen fittings slowly to release pressure.

11. Remove the charge adapter from the hammer charge valve.

12. Replace the charge valve cap.

- 30 -

NPK

GAS CHARGE, CONTINUED

DISCHARGING THE GAS PRESSURE

PROCEDURE

1. Remove the charge valve cap (A).

2. Turn the NPK charge adapter T-handle (A) full counterclockwise.

3. Install the NPK charge adapter (A) on the hammer charge valve (B).

Remove the valve cap only, not the charge valve assembly!

4. Tighten the charge adapter cap (A).

5. Turn the T-handle (A) clockwise. As the T-

6. Loosen the charge adapter cap (A) VERY SLOWLY. handle (A) is screwed in, a resistance is encountered. By turning the T-handle

(A) further, the nitrogen gas pressure will be indicated on the

The gas pressure will gradually decrease to zero; then REMOVE THE CAP

(A).

7. Remove the charge adapter

(B) from the hammer and reinstall charge valve cap. pressure gauge (B).

Stop turning the Thandle (A) when the gauge (B) reads pressure. Do not over tighten.

- 31 -

NPK

TOOLS

STANDARD TOOLS

TOOL TYPE

CHISEL

Crosscut (FX)

MOIL (P)

BLUNT (E)

CORE (PC)

SHAPE APPLICATIONS

• Controlled breakage of concrete

• Layered sedimentary rock

-trenching, oversize

• General demolition

• Cutting casting gates

• Concrete structures – columns, etc.

• Soft material

• Concrete slab, bridge decking

• Oversize

• Slag removal

• Hard rock

• General demolition

*The crosscut (FX) tool cuts at right angle, or crosswise, to the stick and boom of the excavator.

*FOR ADDITIONAL TOOL RELATED INFORMATION, PLEASE

CONSULT THE NPK TOOL MANUAL, H040-9600C.

- 32 -

NPK

TOOLS, CONTINUED

CHANGING THE TOOL

REMOVAL

1. Remove the retaining ring by using pliers or screwdrivers, see Figures 1 and 2. It will easily come out if pulled at an angle as shown in Figure 2.

2. Screw an M12 bolt or cap screw into the retainer pin.

3. Pull out retainer pin. If the retainer pin is jammed, use a hammer and drift from the opposite side.

NOTE: THIS PROCEDURE DOES NOT APPLY TO THE MODEL GH30.

Figure 1

Figure 2

RE-INSTALLATION

1. Clean the retainer pin housing hole and retaining ring groove.

2. Coat the surface of the tool with grease, then install.

3. Apply grease to the retaining ring housing groove.

4. Coat the retaining pin with grease, then install.

5. Install the retaining ring in the following manner: a. While deforming the retaining ring as shown in Figure 3, partially force it into the groove. b. Using the handle of the pliers or screwdriver, press the rest of the ring into the groove, see Figure 4.

Figure 3

- 33 -

Figure 4

NPK

TOOLS, CONTINUED

TOOL INSPECTION

1. Deformation may occur on the tool in the retaining pin contact area or on thrust surface (A). If these areas are mushroomed, the tool may become difficult to remove from the tool holder. Dress with a grinder.

2. Excessive blank hammering may cause chipping (A) in the retaining pin contact area. If neglected, the chipping may reduce the life of the retaining pin. Dress with a grinder (B).

3. If chipping (A) is found at the top of the tool, replace the tool. If neglected, the piston impact surface will be damaged.

(C) is normal

(D) is chipped

- 34 -

NPK

TOOLS, CONTINUED

MAXIMUM TOOL TO TOOL BUSHING CLEARANCE

Replace the tool bushing (A), and/or tool (B), when the tool to bushing gap reaches the maximum clearance. To determine whether the bushing or tool requires replacement, follow the instructions and charts shown below:

Step 1

Measure the tool to bushing gap (C) with the hammer horizontal, as illustrated below. If the clearance is at or greater than the charted maximum clearance, consult the NPK

Hydraulic Hammer Service Manual to determine which component requires replacement.

MODEL

MAXIMUM CLEARANCE inch (mm)

Step 2

Remove the tool from the tool holder. Measure the diameter (D) of the bearing surface of the tool, which is located on each side of the retaining pin groove. The minimum tool diameter is compared to a new tool bushing only. If the tool is at, or below the charted value, the tool must be replaced.

MODEL

GH9

GH10

GH12

GH15

GH18

GH30

NEW TOOL DIAMETER

(D) inch (mm)

5.0 (126)

5.4 (136)

5.7 (146)

6.1 (156)

6.5 (165)

7.2 (183)

MINIMUM TOOL DIAMETER inch (mm)

4.6 (116)

5.0 (126)

5.2 (132)

5.6 (142)

6.0 (152)

6.6 (167)

- 35 -

NPK

TOOLS, CONTINUED

MAXIMUM TOOL TO TOOL BUSHING CLEARANCE,

CONTINUED

Step 3

Measure the inside diameter of the lower and upper tool bushings. The maximum tool bushing inside diameter is compared to a new tool only. If the tool bushing dimensions are at or above the charted value, the bushing must be replaced.

MODEL

GH9

GH10

GH12

GH15

NEW BUSHING

INSIDE DIAMETER inch (mm)

5.0 (126)

5.4 (136)

5.7 (146)

6.1 (156)

MAXIMUM BUSHING

INSIDE DIAMETER inch (mm)

5.4 (136)

5.8 (146)

6.2 (159)

6.6 (169)

GH18

GH30

6.5 (165)

7.2 (184)

7.0 (178)

7.8 (200)

Step 4

Compare the tool and bushings to the charts in Step 2 and Step 3. Choose the new component (tool or bushing) that will bring the maximum clearance to below the value seen in the chart of Step 1. Obviously, replacing both the tool and bushings would bring the clearance back to new.

- 36 -

NPK

RETAINING PIN

The tool retaining pin serves to keep the tool in the hammer when the hammer is raised off the ground for repositioning. Additionally, the retaining pin will become worn during normal use. Figure (A) shows the retaining pin when it is new. Note: the two guide grooves. These areas and the area between the grooves are the areas where the wear will take place. If large, flat areas are found here, the pin must be replaced. This would indicate that the hammer is not being greased frequently enough.

Normal wear will occur on the pin as shown in Figure (B). Grind this area on a bench grinder or with a disc grinder to remove any burrs. Reuse the pin.

Figure (A)

Figure (B)

Note: The retaining pin is a wear item and will require replacement

every so often.

- 37 -

NPK

TIE RODS

TIE ROD TORQUE

See TIE ROD REPLACEMENT section of the Service Manual for complete procedure when replacing a Tie Rod.

1. Tighten all TOP NUTS with a TORQUE WRENCH to the recommended pre-torque specification shown in CHART 1. (It may take several passes at each top nut to achieve this.) Check that no gap is noted between the sections.

2. Mark all the TOP NUTS and HEAD as shown in figure 1.

3. Further tighten all the TOP NUTS to step #1 as shown in figure 1.

4. Further tighten all the TOP NUTS to step #2 as shown in figure 1.

5. Further tighten all the TOP NUTS to step #3 as shown in figure 1 using Chart 1 below for the appropriate number of flats per hammer model.

Figure 1.

Mark all

Top Nuts.

Step #1.

First turn

(3 flats)

Step #2.

Second turn

(3 more flats)

Step #3.

Final turn

(see Chart 1)

MODEL

Pre-

Torque

Ft/lbs (Nm)

CHART 1.

Total No. of

Flats

Using *Sweeney

Anti-seize

7

7

8

Total No. of

Flats

Using standard anti-seize

Socket Size inch (mm)

7.5 2-3/4”

7.5

8.5

8.5

9.5

9

10

2.5 3 3-5/8” (90)

*Sweeney 503 Anti-seize recommended.

*Note: Torque method for “GH” Hammers is different from method previously used on

“H” and “E” Hammers.

If you have any questions call NPK Service Department at 800-225-4379.

- 38 -

NPK

HAMMER FASTENER TORQUE

If hammer or hammer bracket fasteners are found to be loose, use the following charts.

Medium strength thread adhesive should be used on all the valve assembly bolts and the gas charge valve. All other bolts should be lubed with anti-seize compound.

SOCKET HEAD CAP SCREWS (SHCS)

VALVE CASE

VALVE TOP AND

SWIVEL ADAPTER

MODEL

SHCS TORQUE

BOTTOM CAP

SHCS TORQUE SHCS TORQUE

DIA ft/lb (Nm) DIA ft/lb (Nm) DIA ft/lb (Nm)

GH9 M24 900 (1220) M22 710 (960) M12 110 (150)

GH10

GH12

GH15

GH18

M24 900 (1220) M22 710 (960) M12 110 (150)

M24 900 (1220) M22 710 (960) M12 110 (150)

M27 1300 (1750) M24 900 (1220) M14 175 (240)

M27 1300 (1750) M24 900 (1220) M14 175 (240)

GH30 M27 1300 (1750) M24 900 (1220) M14 175 (240)

See HAMMER DISASSEMBLY AND ASSEMBLY – TOOLS AND EQUIPMENT section of the Service Manual for NPK hex key wrench part numbers.

HEX HEAD BOLTS

MODEL

HAMMER BRACKET

BOLT

DIA

TORQUE ft/lb (Nm)

RUBBER MOUNTS

BOLT

DIA

TORQUE ft/lb (Nm)

TOP ADAPTER

BRACKET

BOLT

DIA

TORQUE ft/lb (Nm)

GH9 1-1/4” 1100 (1490) M16 155 (210) 1” 550 (745)

GH10 1-1/4” 1100 (1490) M20 300 (410) 1” 550 (745)

GH12 1-1/2” (2710) M20

GH15 1-1/2” (2710) M20

GH18 1-1/2” (2710) M20

GH30 1-3/4” (3390) 530

- 39 -

NPK

STORAGE OF HYDRAULIC HAMMER

For short term storage between jobs, place the hammer horizontal on wood blocks (A).

Be sure the tool (F) is liberally greased and the hydraulic hoses (C) are capped. Cover with a waterproof tarp (D), not shown.

If the NPK HYDRAULIC HAMMER is not to be used for a long period of time (months), the following storage procedure is recommended:

1. Discharge the gas pressure (E).

2. Remove the Tool (F) and push the Piston (G) all the way in.

3. Grease the exposed end of the Piston (H).

4. Grease and reinstall the Tool at bushing areas (B)

5. Plug the hydraulic hoses (C).

6. Cover with a waterproof tarp (D), not shown.

7. Set the hammer on wood blocks (A).

- 40 -

NPK

NOTES AND RECORDS

NPK HYDRAULIC HAMMER MODEL NUMBER _______________

SERIAL

NPK INSTALLATION KIT NUMBER ________________________

CARRIER MANUFACTURER

MODEL NUMBER

SERIES

SERIAL NUMBER

DATE OF INSTALLATION _________________

DATE OF 20 HOUR INSPECTION ___________ WARRANTY REGISTRATION SENT ‰

- 41 -

© Copyright 2007 NPK Construction Equipment, Inc. www.npkce.com

H050-9630B 08-07 08/07