OPERATION AND PARTS MANUAL
SERIES
MODEL MT77HFR
TAMPING RAMMER
(HONDA GXR120RT-KRB6 GASOLINE ENGINE)
Revision # 0 (06/08/17)
To find the latest revision of this
publication, visit our website at:
www.multiquip.com
THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
PROPOSITION 65 WARNING
PAGE 2 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
NOTES
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 3
TABLE OF CONTENTS
MT77HFR Rammer
Proposition 65 Warning............................................ 2
Parts Ordering Procedures....................................... 5
Safety Information................................................. 6-9
Specifications......................................................... 10
Noise And Vibration Emissions............................... 11
General Information................................................ 12
Components...................................................... 14-15
Basic Engine........................................................... 16
Inspection.......................................................... 17-18
Operation........................................................... 19-20
Maintenance...................................................... 21-22
Troubleshooting................................................. 23-25
Explanation Of Code In Remarks Column............. 26
Suggested Spare Parts.......................................... 27
Component Drawings
Nameplates And Decals Assembly.................... 28-29
Crankcase And Engine Assembly...................... 30-33
Guide Cylinder And Spring Assembly............... 34-35
Foot Assembly................................................... 36-37
Fuel Tank And Handle Assembly....................... 38-39
Honda GXR120RTKRB6 Engine
Cylinder Barrel Assembly................................... 40-41
Crankcase Cvr. Assembly.................................. 42-43
Crankshaft Assembly......................................... 44-45
Piston/Conn. Rod Assembly............................... 46-47
Camshaft Pulley Assembly................................ 48-49
Recoil Starter Assembly..................................... 50-51
Fan Cover Assembly.......................................... 52-53
Carburetor Assembly......................................... 54-55
Air Cleaner Assembly......................................... 56-57
Muffler Assembly................................................ 58-59
Flywheel Ignition Assembly................................ 60-61
Control Assembly............................................... 62-63
Labels Assembly................................................ 64-65
Terms And Conditions Of Sale — Parts................. 66
NOTICE
Specifications and part numbers are subject to change
without notice.
PAGE 4 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
www.multiquip.com
PARTS ORDERING PROCEDURES
Ordering parts has never been easier!
Choose from three easy options:
Order via Internet (Dealers Only):
Best Deal!
Effective:
January 1st, 2006
If you have an MQ Account, to obtain a Username
and Password, E-mail us at: parts@multiquip.
com.
Order parts on-line using Multiquip’s SmartEquip website!
■ View Parts Diagrams
■ Order Parts
■ Print Specification Information
To obtain an MQ Account, contact your
District Sales Manager for more information.
Use the internet and qualify for a 5% Discount
on Standard orders for all orders which include
complete part numbers.*
Goto www.multiquip.com and click on
Order Parts to log in and save!
Note: Discounts Are Subject To Change
Order via Fax (Dealers Only):
All customers are welcome to order parts via Fax.
Domestic (US) Customers dial:
1-800-6-PARTS-7 (800-672-7877)
Fax your order in and qualify for a 2% Discount
on Standard orders for all orders which include
complete part numbers.*
Note: Discounts Are Subject To Change
Order via Phone: Domestic (US) Dealers Call:
1-800-427-1244
Non-Dealer Customers:
Contact your local Multiquip Dealer for
parts or call 800-427-1244 for help in
locating a dealer near you.
International Customers should contact
their local Multiquip Representatives for
Parts Ordering information.
When ordering parts, please supply:
❒
❒
❒
❒
❒
❒
Dealer Account Number
Dealer Name and Address
Shipping Address (if different than billing address)
Return Fax Number
Applicable Model Number
Quantity, Part Number and Description of Each Part
❒
Specify Preferred Method of Shipment:
✓ UPS/Fed Ex
✓ DHL
■ Priority One
✓ Truck ■ Ground
■ Next Day
■ Second/Third Day
NOTICE
All orders are treated as Standard Orders and will
ship the same day if received prior to 3PM PST.
WE ACCEPT ALL MAJOR CREDIT CARDS!
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 5
SAFETY INFORMATION
Do not operate or service the equipment before reading
the entire manual. Safety precautions should be followed
at all times when operating this equipment.
Failure to read and understand the safety
messages and operating instructions could
result in injury to yourself and others.
Potential hazards associated with the operation of this
equipment will be referenced with hazard symbols which
may appear throughout this manual in conjunction with
safety messages.
SAFETY MESSAGES
The four safety messages shown below will inform you
about potential hazards that could injure you or others. The
safety messages specifically address the level of exposure
to the operator and are preceded by one of four words:
DANGER, WARNING, CAUTION or NOTICE.
SAFETY SYMBOLS
DANGER
Indicates a hazardous situation which, if not avoided,
WILL result in DEATH or SERIOUS INJURY.
WARNING
Indicates a hazardous situation which, if not avoided,
COULD result in DEATH or SERIOUS INJURY.
CAUTION
Indicates a hazardous situation which, if not avoided,
COULD result in MINOR or MODERATE INJURY.
NOTICE
Addresses practices not related to personal injury.
PAGE 6 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
SAFETY INFORMATION
GENERAL SAFETY
CAUTION
„ NEVER operate this equipment without proper protective
clothing, shatterproof glasses, respiratory protection,
hearing protection, steel-toed boots and other protective
devices required by the job or city and state regulations.
„ ALWAYS know the location of the nearest phone or keep a
phone on the job site. Also, know the phone numbers of
the nearest ambulance, doctor and fire department. This
information will be invaluable in the case of an emergency.
RAMMER SAFETY
DANGER
„ NEVER operate this equipment when not
feeling well due to fatigue, illness or when
under medication.
„ NEVER operate this equipment under the influence of
drugs or alcohol.
„ ALWAYS check the equipment for loosened threads or
bolts before starting.
„ DO NOT use the equipment for any purpose other than
its intended purposes or applications.
NOTICE
„ This equipment should only be operated by trained and
qualified personnel 18 years of age and older.
„ Whenever necessary, replace nameplate, operation and
safety decals when they become difficult read.
„ Manufacturer does not assume responsibility for any
accident due to equipment modifications. Unauthorized
equipment modification will void all warranties.
„ NEVER use accessories or attachments that are not
recommended by Multiquip for this equipment. Damage
to the equipment and/or injury to user may result.
„ ALWAYS know the location of the nearest
fire extinguisher.
„ ALWAYS know the location of the nearest
first aid kit.
„ NEVER operate the equipment in an explosive
atmosphere or near combustible materials. An
explosion or fire could result causing severe
bodily harm or even death.
WARNING
„ NEVER disconnect any emergency or safety devices.
These devices are intended for operator safety.
Disconnection of these devices can cause severe injury,
bodily harm or even death. Disconnection of any of these
devices will void all warranties.
„ DO NOT use this machine on ground that is harder than
the machine can handle, or for driving pilings or tamping
rock beds. Furthermore, use of the machine on sloping
ground, such as the side of an embankment, may make
the machine unstable and can cause an accident. It can
also result in premature machine wear due to uneven
loads on the machine.
Use the machine with confidence for tamping earth and
sand, soil, gravel, and asphalt. DO NOT use the machine
for other types of jobs.
CAUTION
„ NEVER lubricate components or attempt service on a
running machine.
NOTICE
„ ALWAYS keep the machine in proper running condition.
„ Fix damage to machine and replace any broken parts
immediately.
„ ALWAYS store equipment properly when it is not being
used. Equipment should be stored in a clean, dry location
out of the reach of children and unauthorized personnel.
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 7
SAFETY INFORMATION
ENGINE SAFETY
DANGER
„ The engine fuel exhaust gases contain poisonous carbon
monoxide. This gas is colorless and odorless, and can
cause death if inhaled.
FUEL SAFETY
DANGER
„ DO NOT add fuel to equipment if it is placed inside truck
bed with plastic liner. Possibility exists of explosion or
fire due to static electricity.
„ The engine of this equipment
requires an adequate free flow
of cooling air. NEVER operate
this equipment in any enclosed
or narrow area where free flow
of the air is restricted. If the air
flow is restricted it will cause
injury to people and property
and serious damage to the
equipment or engine.
WARNING
„ DO NOT place hands or fingers inside engine
compartment when engine is running.
„ NEVER operate the engine with heat shields or
guards removed.
„ DO NOT remove the engine oil drain plug
while the engine is hot. Hot oil will gush
out of the oil tank and severely scald any
persons in the general area of the rammer.
CAUTION
„ NEVER touch the hot exhaust manifold,
muffler or cylinder. Allow these parts to cool
before servicing equipment.
NOTICE
„ NEVER run engine without an air filter or with a dirty air
filter. Severe engine damage may occur. Service air filter
frequently to prevent engine malfunction.
„ NEVER tamper with the factory settings
of the engine or engine governor. Damage
to the engine or equipment can result
if operating in speed ranges above the
maximum allowable.
„ DO NOT start the engine near spilled fuel or combustible
fluids. Fuel is extremely flammable and its vapors can
cause an explosion if ignited.
„ ALWAYS refuel in a well-ventilated area, away from
sparks and open flames.
„ ALWAYS use extreme caution when working with
flammable liquids.
„ DO NOT fill the fuel tank while the engine is running
or hot.
„ DO NOT overfill tank, since spilled fuel could ignite if it
comes into contact with hot engine parts or sparks from
the ignition system.
„ Store fuel in appropriate containers, in well-ventilated
areas and away from sparks and flames.
„ NEVER use fuel as a cleaning agent.
„ DO NOT smoke around or near the
equipment. Fire or explosion could result
from fuel vapors or if fuel is spilled on a
hot engine.
PAGE 8 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
SAFETY INFORMATION
TRANSPORTING SAFETY
CAUTION
„ NEVER allow any person or animal to stand underneath
the equipment while lifting.
NOTICE
„ Before lifting, make sure that the equipment parts (hook
and vibration insulator) are not damaged and screws are
not loose or missing.
„ Always make sure crane or lifting device has been
properly secured to the lifting bail (hook) of the
equipment.
„ ALWAYS shutdown engine before transporting.
„ NEVER lift the equipment while the engine is running.
„ Tighten fuel tank cap securely and close fuel cock to
prevent fuel from spilling.
„ Use adequate lifting cable (wire or rope) of sufficient
strength.
„ Use one point suspension hook and lift straight
upwards.
„ DO NOT lift machine to unnecessary heights.
„ ALWAYS tie down equipment during transport by
securing the equipment with rope.
„ Never allow any person or animal to stand underneath the
equipment while lifting.
ENVIRONMENTAL SAFETY
NOTICE
„ Dispose of hazardous waste properly.
Examples of potentially hazardous waste
are used motor oil, fuel and fuel filters.
„ DO NOT use food or plastic containers to dispose of
hazardous waste.
„ DO NOT pour waste, oil or fuel directly onto the ground,
down a drain or into any water source.
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 9
SPECIFICATIONS
Overall Height
Overall Width
Over Length
Shoe Size (L x W)
Fuel Tank Capacity
Lubrication Oil Capacity
No. of Blows Per Minute
Impact Force
Impact Plate Stroke
Operating Weight
Table 1. Rammer Specifications
42.12 in. (1070 mm)
14.76 in. (375 mm)
29.13 in. (740 mm)
13.4 x 11.2 in. (340 x 285 mm)
2.11 qt. (2.0 liters)
0.8 qt. (0.75 liter)
644 - 695
2,653 - 3,080 lbf (11.8 - 13.7 kN)
2 - 3.15 in. (50 - 80 mm)
169.8 lbs. (77 kg)
Model
Table 2. Engine Specifications
Honda GXR120RT-KRB6 Engine
Type
Piston Displacement
Max. Output
Max. Governed Speed, No Load
Cooling System
Engine Oil Capacity
Fuel
Lubricant for Engine
Starting System
Spark Plug Type
Air-Cooled 4 Stroke,
single cylinder gasoline engine
7.38 cu.in. (121 cc)
3.6 hp/3,600 rpm (2.7 KW)
3,800 - 4,100 rpm
Air-Cooled
0.3 qt. (0.28 liters)
Unleaded gasoline
Automobile Oil; Class SE or higher
Recoil Starter
NGK CR5HSB
PAGE 10 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
NOISE AND VIBRATION EMISSIONS
Table 3. Noise and Vibration Emissions
Measured Sound Power Level in dB(A)
104
Guaranteed Sound Power Level in dB(A)
107
Guaranteed Sound Pressure Level at Operator Station in dB(A)
94
Hand-Arm Vibration in m/s2
7.8
NOTES:
1. Products are tested for sound pressure level in accordance with European Directives 2000/14/EC and 2005/88/EC, relating to Noise Emission
in the Environment by equipment for use outdoors.
2. Products are tested for hand/arm vibration (HAV) level in accordance with European Directives 2002/44/EC and EN500-4 and ISO 5349-1:2001,
ISO 5349-2:2001.
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 11
GENERAL INFORMATION
The Multiquip MT77HFR tamping rammer is a powerful
compacting tool capable of applying a tremendous force
in consecutive impacts to a soil surface. Its applications
include soil compacting for road, embankments and
reservoirs as well as backfilling for gas pipelines, water
pipelines and cable installation work.
The impact force of the MT77HFR levels and uniformly
compacts voids between soil particles to increase dry
density.
Circular motion is converted to create impact force.
The MT77HFR tamping rammer develops a powerful
compacting force at the foot of the rammer. To maintain
optimum performance, proper operation and service are
essential.
The MT77HFR is equipped with an air cooled, four- cycle
gasoline engine. Transmission of the power takes place
by increasing the engine speed to engage the centrifugal
clutch.
The MT77HFR uses an oil bath lubrication system. Always
check the oil level through the oil level sight glass at the
rear of the tamper foot.
Before starting the MT77HFR Tamping Rammer identify
and understand the function of the controls.
CAUTION
Before starting operation check the lifting
handle to:
1. Make sure that there is no damage on the bolts.
2. Make sure that there is no crack or breakage on
handle.
3. Make sure that there is no fissure on the surface.
If there is any abnormality or damage, replace
with new one.
For operation:
This handle is to be used to lift up the shoe part of
the machine with the body laid down on the ground
or truck bed.
1. Use proper lifting techniques to avoid back injury.
This handle is for manual lifting only.
2. Do not use this handle as a rammer lift point. Use
the lifting point on the top of the machine.
3. Do not move the rammer with the lifting handle
and the front rollers more than 16 feet (5 meters).
PAGE 12 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
NOTES
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 13
COMPONENTS
1
2
5
6
7
4
10
3
14
11
12
9
13
8
Figure 1. MT77HFR Rammer
PAGE 14 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
COMPONENTS
Figure 1 shows the location of the controls and components
for the MT77HFR Tamping Rammer. The functions of each
control is described below:
1. Hook — Used to lift rammer for transporting.
2. Handle — To operate rammer, GRIP handle assembly
firmly on both sides.
3. Foot — Laminated wood with tempered steel plate for
superior shock absorption.
4. Bellows — Reservoir for oil bath.
5. Shock Absorber — Protects rammer from damage
by absorbing vibration during operation.
6. Fuel Tank Cap — Remove this cap to add unleaded
gasoline to the fuel tank. Make sure cap is tightened
securely. DO NOT over fill.
7. Fuel Tank — Holds the fuel for the unit (up to 3.2
quarts).
8. Drain Valve — Open this valve to remove oil from the
bellows.
9. Oil Gauge (Sight Glass) — Indicates the level of oil in
the oil bath reservoir.
10. Engine — This unit uses a Honda GXR120RTKRB6
gasoline engine.
11. Hour and Tacho Meter — Measures run time and
engine RPM.
12. Throttle Lever — Used to adjust engine speed (rpm).
Move lever forward (SLOW) to reduce engine speed.
Move lever back toward operator (FAST) to increase
speed. Always operate the rammer at full speed (rpm).
13. Engine Stop Switch — Controls the starting and
stopping of the engine. Switch must be in the "ON"
position when starting the engine.
14. Fuel Shut-Off Valve — Supplies fuel from the fuel tank
to the engine. To begin fuel flow move the fuel shut-off
valve lever downward.
WARNING
Adding fuel to the tank should be
accomplished only when the engine is
stopped and has had an opportunity to
cool down. In the event of a fuel spill, DO
NOT attempt to start the engine until the
fuel residue has been completely wiped up, and the
area surrounding the engine is dry.
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 15
BASIC ENGINE
1
2
3
4
5
6
Figure 2. Honda GXR120RT-KRBF Engine
The engine (Figure 2) must be checked for proper lubrication and filled with fuel prior to operation. Refer to the
engine manufacturer's manual for detailed operation and
service information.
1. Choke Lever — Normally used in starting the engine in
cold weather conditions. In cold weather, turn the choke
lever to the fully closed position. In warm weather, set
the choke lever halfway or completely open.
2. Spark Plug — Provides spark to the ignition system.
Set spark plug gap to 0.024 - 0.028 inch (0.6 - 0.7 mm).
Clean spark plug once a week.
3. Muffler — Used to reduce noise and emissions.
4. Dipstick/Oil Filler Cap — Remove this cap to
determine if the engine oil is low. Add oil through this
filler port as recommended in Table 3.
5. Oil Drain Plug — Remove this plug to remove oil from
the engine's crankcase.
6. Recoil Starter (pull rope) — Manual-starting method.
Pull the starter grip until resistance is felt, then pull
briskly and smoothly.
NOTICE
Operating the engine without an air filter, with a
damaged air filter, or a filter in need of replacement
will allow dirt to enter the engine, causing rapid engine
wear.
WARNING
Engine components can generate
extreme heat. To prevent burns, DO
NOT touch these areas while the
engine is running or immediately
after operating. NEVER operate the
engine with the muffler removed.
PAGE 16 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
INSPECTION
It is extremely important that this section be read carefully
before attempting to operate the rammer. DO NOT use
your rammer until this section is thoroughly understood.
OIL CHECK
ENGINE OIL CHECK
2. Place the machine on a level surface and then tilt it
forward (Figure 5).
1. Check the oil level through the oil gauge onthe
protective sleeve(Figure 3) at the right side of the
tamper foot.
TILT UNIT
TO CHECK
ENGINEOIL
LEVEL
PROTECTIVE
SLEEVE
OIL LEVEL
PLUG
DRAIN
PLUG
Figure 5. Tilting Machine
NOTICE
Low levels of oil may result in engine seizure due to
high levels of consumption during operation.
Figure 3. Oil Check
2. If not enough oil, e, add 10W-30 SE, SF or higher grade
motor oil into the oil fill plug opening. The bath contains
approximately 0.8 qt. (0.75 liter).
FUEL CHECK
3. Check the engine oil level and if the engine oil level
is low, it should be refilled (Figure 6). Use the proper
motor oil as suggested in the Table 4 below.
OIL LEVEL
DIPSTICK
1. Fill the fuel tank (Figure 4) with unleaded gasoline. At
the same time, check the engine oil and make it a habit
to replenish it often (Figure 6).
FUEL TANK CAP
FUEL TANK
Figure 6. Engine Oil Dipstick
Table 4. Motor Oil Grade
Grade of motor oil
Season or Temperature
(higher than MS class)
Figure 4. Fuel Tank
Spring, Summer or Autumn
+120° F to +15° F
SAE 30
Winter
+40° F to +15° F
SAE 30
Below +15° F
SAE 10W-30
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 17
INSPECTION
GENERAL INSPECTION
1. Check all nuts, bolts fasteners for tightness. Retighten
nuts (Figure 7) as necessary with the following torques:
•Nut M10 — 21.6 ft.lbf (29.4 N.m)
•Nut M12 — 78.4 ft.lbf (57.9 N.m)
PLATE
NUTS
PLATE
NUTS
FOOT
NUTS
PLATE
NUTS
Figure 7. Tightening Nuts
2. Clean any dirt from the recoil starter and foot pedestal.
Wipe the entire unit clean before operating.
3. Replace any missing or damaged Safety Operation
decals.
4. Adjust height of handle. Adjust handle by loosening
nuts and moving handle to suit operation. Retighten
nuts.
PAGE 18 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
OPERATION
CAUTION
CHOKE LEVER
Failure to understand the operation of the rammer could
result in severe damage to the unit or personal injury.
INITIAL STARTUP
When starting the MT77HFR rammer perform the following:
1. Open the fuel shut-off valve by moving the lever to the
ON (open) position (Figure 8).
FUEL SHUT-OFF
VALVE LEVER
“OFF”
(CLOSE)
“OPEN”
“CLOSE”
Figure 10. Choke Lever
4. Grip the starter rope handle (Figure 11) and pull it
until you feel a slight resistance. Then pull sharply and
quickly. Return the handle to the starter case before
releasing.
“ON”
(OPEN)
STARTER HANDLE
Figure 8. Fuel Shut-Off Valve
2. Set the engine ON/OFF switch to the ON (start) position
(Figure 9).
ENGINE SWITCH
RECOIL STARTER
Figure 11. Recoil Starter
5. If engine fails to start, move the choke lever (Figure 10)
to the half open position to avoid flooding.
ON
6. Repeat steps 1 thru 5.
7. If the engine does not start after repeated attempts,
check the spark plug for excess fuel. Clean and replace
the spark plug as needed.
Figure 9. Engine Switch
3. Close the choke lever (Figure 10) and move the throttle
lever to the "Full Open" position. Turning the choke
lever 90° clockwise closes the choke. In cold weather,
start the unit with choke fully closed. In warm weather
or when the engine is warm, the unit can be started
with choke halfway or completely open.
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 19
OPERATION
OPERATION
1. To start the rammer tamping action, move the throttle
lever (Figure 12) quickly from idle to the operating
position. The rammer will start up and down motion. DO
NOT move the throttle lever slowly as this may cause
damage to the clutch or spring.
IDLE POSITION
アイドリング(低速)
IDLE POSITION
THROTTLE
LEVER
OPERATING POSITION
THROTTLE
LEVER
OPERATING
POSITION
Figure 12. Throttle Lever (Operating Position)
CAUTION
If the rammer is used on sloping ground, make sure
that the surroundings are safe and take extra caution
in preventing the machine from falling over.
Figure 13. Throttle Lever (Idle Position)
STOPPING THE ENGINE
1. Move throttle lever quickly from the operating to idle
position (Figure 13) and run the engine for three
minutes at low speed. After the engine cools, move
the engine stop switch to the OFF position (Figure 14).
OFF
2. In cold weather, the oil in the machine will be thicker
and the resistance of the components will be higher.
This can cause irregular motion. Shift the throttle lever
for the operating position to idle several time and allow
machine to warm up before starting actual work.
3. The metal surface of the foot in contact with the ground
has excellent wear resistance. However, if the ground
contains large stones (size of a fist), place some fill
soil over the ground for even tamping.
4. The machine will advance as it jumps up and down.
For faster advance, push the handle slightly forward
to make the machine lean a little forward.
ENGINE SWITCH
Figure 14. Engine Stop Switch (OFF)
2. Move the fuel shut-off valve lever to the OFF (Closed)
position (Figure 15
FUEL SHUT-OFF VALVE LEVER
“OFF”
(CLOSE)
5. To stop the tamping action, move throttle lever quickly
from operating to idle position (Figure 13). DO NOT
move the throttle lever slowly.
“ON”
(OPEN)
Figure 15. Fuel Shut-off Lever (OFF)
PAGE 20 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
MAINTENANCE
DAILY
EVERY 200 HOURS
„„Thoroughly remove dirt and oil from the engine and
control area.
„„Remove the oil drain plug on foot housing (Figure 18) and
drain the oil. Refill with approximately 0.8 qt. (0.75 liter)
of 10W-30 SE, SF or higher grade motor oil. Check oil
gauge on the protective sleeve from the right side if oil
is at specified level.
„„Clean or replace the air cleaner elements as necessary.
Check and retighten all fasteners as necessary.
„„Check the spring box and bellows for oil leaks. Repair
or replace as needed.
PROTECTIVE
SLEEVE
EVERY 50 HOURS
OIL LEVEL
PLUG
„„Clean the fuel shut-off valve.
DRAIN
PLUG
„„Remove and clean the spark plug, then adjust the spark
gap to 0.024~0.028 inch (0.6~0.7 mm).
Figure 18. Oil Replacement
EVERY 150 HOURS
„„Remove the element from the air cleaner cover - upper
part (Figure 16) and wash it with gasoline or kerosene.
Then dip it in engine oil (SAE10W-30) and squeeze
lightly. Reinstall the element.
EVERY 2 YEARS
„„Replace the fuel line every 2 years even if there is no
visible damage.
AIR CLEANER
(UPPER)
ELEMENT
Figure 16. Air Cleaner (Upper)
„„Remove the element from the air cleaner - engine
(Figure 17) and wash it with gasoline or kerosene.
Reinstall the element.
ELEMENT
Figure 17. Air Cleaner (Engine)
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 21
MAINTENANCE
STORAGE
LONG TERM STORAGE
„„Wash off any dirt or mud on the machine with clean water.
After the engine and main body have cooled down, store
the rammer on a level location.
„„Slide the throttle lever to the STOP position.
„„Drain any fuel including in the fuel hose.
„„Replace lubrication oil and apply grease to lubrication
points.
„„Cover the air intake on the air cleaner and the exhaust
outlet on the muffler.
„„Store unit indoors covered with plastic sheet in moisture
free and dust free location out of direct sunlight.
„„Secure the machine body so that it can not fall down. If
you have to lay the machine down, close the fuel tank
cap securely and tighten engine oil drain plug.
„„After the engine and machine body have cooled down,
lay the machine so that the carburetor is facing up. Once
the machine has been laid down, make sure that there
is no fuel or lubrication oil leaks. If the fuel leaks, drain
the fuel from the fuel tank.
„„Put a cover on the machine body to protect it from dust
and dirt. Store the machine in a location that is not
exposed to direct sunlight and which has low humidity.
TRANSPORTING
„„Transport the rammer in a secure and level upright
position.
„„If you must lay the machine down to transport it, drain
any fuel from the fuel tank and carburetor. Then close
the fuel tank cap and oil fill plug securely. Next, position
the machine so that the air cleaner will be facing up
(Figure 19).
AIR CLEANER
SIDE
Figure 19. Transporting Rammer
PAGE 22 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
TROUBLESHOOTING
Troubleshooting (Engine)
Symptom
Possible Problem
Combo lever in incorrect position?
Make sure combo lever is in start position.
Spark plug bridging?
Check gap, insulation or replace spark plug.
Carbon deposit on spark plug?
Clean or replace spark plug.
Short circuit due to deficient spark plug
insulation?
Check spark plug insulation, replace if worn.
Improper spark plug gap?
Set to proper gap.
Fuel reaching carburetor?
Check fuel line.
Water in fuel tank?
Flush or replace fuel tank.
Difficult to start, fuel is available, but no spark at Fuel filter clogged?
spark plug.
Stuck carburetor?
Difficult to start, fuel is available, and spark is
present at the spark plug.
Difficult to start, fuel is available, spark is
present and compression is normal.
Difficult to start, fuel is available, spark is
present and compression is low.
No fuel present at carburetor.
Solution
Replace fuel filter.
Check float mechanism.
Spark plug is red?
Check transistor ignition unit.
Spark plug is bluish white?
If insufficient compression, repair or replace
engine. If injected air leaking, correct leak. If
carburetor jets clogged, clean carburetor.
No spark present at tip of spark plug?
Check transistor ignition unit is broken, and
replace defective unit. Check if voltage cord
cracked or broken and replace. Check if spark
plug if fouled and replace.
No oil?
Add oil as required.
ON/OFF switch is shorted?
Check switch wiring, replace switch.
Ignition coil defective?
Replace ignition coil.
Improper spark gap, points dirty?
Set correct spark gap and clean points.
Condenser insulation worn or short circuiting?
Replace condenser.
Spark plug wire broken or short circuiting?
Replace defective spark plug wiring.
Wrong fuel type?
Flush fuel system, replace with correct type of
fuel.
Water or dust in fuel system?
Flush fuel system.
Air cleaner dirty?
Clean or replace air cleaner.
Choke open?
Close choke.
Suction/exhaust valve stuck or protruded?
Reseat valves.
Piston ring and/or cylinder worn?
Replace piston rings and/or piston.
Cylinder head and/or spark plug not tightened
properly?
Torque cylinder head bolts and spark plug.
Head gasket and/or spark plug gasket damaged?
Replace head and spark plug gaskets.
No fuel in fuel tank?
Fill with correct type of fuel.
Fuel cock does not open properly?
Apply lubricant to loosen fuel cock lever,
replace if necessary.
Fuel filter/lines clogged?
Replace fuel filter.
Fuel tank cap breather hole clogged?
Clean or replace fuel tank cap.
Air in fuel line?
Bleed fuel line.
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 23
TROUBLESHOOTING
Troubleshooting (Engine) - continued
Symptom
Weak in power, compression is proper and
does not misfire.
Weak in power, compression is proper but
misfires.
Engine overheats.
Rotational speed fluctuates.
Recoil starter malfunctions. (if applicable)
Starter malfunctions.
Possible Problem
Air cleaner dirty?
Clean or replace air cleaner.
Improper level in carburetor?
Check float adjustment, rebuild carburetor.
Defective spark plug?
Clean or replace spark plug.
Improper spark plug?
Set to proper gap.
Water in fuel system?
Flush fuel system and replace with correct
type of fuel.
Dirty spark plug?
Clean or replace spark plug.
Ignition coil defective?
Replace ignition coil.
Spark plug heat value incorrect?
Replace with correct type of spark plug.
Wrong type of fuel?
Replace with correct type of fuel.
Cooling fins dirty?
Clean cooling fins.
Intake air restricted?
Clear intake of dirt and debris. Replace air
cleaner elements as necessary.
Oil level too low or too high?
Adjust oil to proper level.
Governor adjusted incorrectly?
Adjust governor.
Governor spring defective?
Replace governor spring.
Fuel flow restricted?
Check entire fuel system for leaks or clogs.
Recoil mechanism clogged with dust and dirt?
Clean recoil assembly with soap and water.
Spiral spring loose?
Replace spiral spring.
Loose, damaged wiring?
Ensure tight, clean connections on battery
and starter.
Battery insufficiently charged?
Recharge or replace battery.
Starter damaged or internally shorted?
Replace starter.
Over-accumulation of exhaust products?
Check and clean valves. Check muffler and
replace if necessary.
Wrong spark plug?
Replace spark plug with manufacturer's
suggested type.
Lubricating oil is wrong viscosity?
Replace lubricating oil with correct viscosity.
Worn rings?
Replace rings.
Air cleaner clogged?
Clean or replace air cleaner.
Choke valve set to incorrect position?
Adjust choke valve to correct position.
Carburetor defective, seal on carburetor
broken?
Replace carburetor or seal.
Poor carburetor adjustment, engine runs too
rich?
Adjust carburetor.
ON/OFF device not activated ON?
Turn on ON/OFF device.
Battery disconnected or discharged?
Check cable connections. Charge or replace
battery
Ignition switch/wiring defective?
Replace ignition switch. Check wiring.
Burns too much fuel.
Exhaust color is continuously "white".
Exhaust color is continuously "black".
Will not start, no power with key "ON". (if
applicable)
Solution
PAGE 24 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
TROUBLESHOOTING
Symptom
Engine runs but rammer jumps
erratically or not at all.
Troubleshooting (Rammer)
Possible Problem
Operating speed of throttle lever is
incorrectly set?
Oil in excess?
Clutch slips?
Spring Failure?
Speed of engine improper?
Soil over-compacted?
Solution
Set throttle lever to correct position.
Drain excess oil. Bring to correct level.
Replace or adjust clutch.
Replace spiral spring.
Adjust engine speed to correct
operating RPM setting.
Shut down machine and test soil.
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 25
EXPLANATION OF CODE IN REMARKS COLUMN
The following section explains the different symbols and
remarks used in the Parts section of this manual. Use the
help numbers found on the back page of the manual if there
are any questions.
NOTICE
The contents and part numbers listed in the parts
section are subject to change without notice. Multiquip
does not guarantee the availability of the parts listed.
SAMPLE PARTS LIST
NO.
1
2%
2%
3
4
PART NO. PART NAME
QTY. REMARKS
12345
BOLT .....................1 .....INCLUDES ITEMS W/%
WASHER, 1/4 IN. ..........NOT SOLD SEPARATELY
12347
WASHER, 3/8 IN. ..1 .....MQ-45T ONLY
12348
HOSE ..................A/R ...MAKE LOCALLY
12349
BEARING ..............1 .....S/N 2345B AND ABOVE
NO. Column
Unique Symbols — All items with same unique symbol
(@, #, +, %, or >) in the number column belong to the
same assembly or kit, which is indicated by a note in the
“Remarks” column.
Duplicate Item Numbers — Duplicate numbers indicate
multiple part numbers, which are in effect for the same
general item, such as different size saw blade guards in
use or a part that has been updated on newer versions
of the same machine.
NOTICE
When ordering a part that has more than one item
number listed, check the remarks column for help in
determining the proper part to order.
PART NO. Column
Numbers Used — Part numbers can be indicated by a
number, a blank entry, or TBD.
TBD (To Be Determined) is generally used to show a
part that has not been assigned a formal part number
at the time of publication.
A blank entry generally indicates that the item is not sold
separately or is not sold by Multiquip. Other entries will
be clarified in the “Remarks” Column.
QTY. Column
Numbers Used — Item quantity can be indicated by a
number, a blank entry, or A/R.
A/R (As Required) is generally used for hoses or other
parts that are sold in bulk and cut to length.
A blank entry generally indicates that the item is not sold
separately. Other entries will be clarified in the “Remarks”
Column.
REMARKS Column
Some of the most common notes found in the “Remarks”
Column are listed below. Other additional notes needed
to describe the item can also be shown.
Assembly/Kit — All items on the parts list with the
same unique symbol will be included when this item is
purchased.
Indicated by:
“INCLUDES ITEMS W/(unique symbol)”
Serial Number Break — Used to list an effective serial
number range where a particular part is used.
Indicated by:
“S/N XXXXX AND BELOW”
“S/N XXXX AND ABOVE”
“S/N XXXX TO S/N XXX”
Specific Model Number Use — Indicates that the part
is used only with the specific model number or model
number variant listed. It can also be used to show a
part is NOT used on a specific model or model number
variant.
Indicated by:
“XXXXX ONLY”
“NOT USED ON XXXX”
“Make/Obtain Locally” — Indicates that the part can
be purchased at any hardware shop or made out of
available items. Examples include battery cables, shims,
and certain washers and nuts.
“Not Sold Separately” — Indicates that an item cannot
be purchased as a separate item and is either part of an
assembly/kit that can be purchased, or is not available
for sale through Multiquip.
PAGE 26 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
SUGGESTED SPARE PARTS
MT77HFR TAMPING RAMMER WITH HONDA GXR120RT-KRB6 GASOLINE ENGINE
1 to 3 units
Qty.P/N
Description
1............956100048.............THROTTLE WIRE
3............374010100.............ELEMENT, AIR CLEANER
1............361910070.............CAP ASSEMBLY, FUEL TANK
2............16910GB2005.......FUEL FILTER
3............9805655777...........SPARK, PLUG
1............954406010.............STRAINER, FUEL TANK
1............28462Z0DV03........ROPE, RECOIL STARTER
1............366348550.............CLUTCH ASSEMBLY
NOTICE
Part numbers on this Suggested Spare Parts list may
supersede/replace the part numbers shown in the
following parts lists.
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 27
MT-77HFR
NAMEPLATES AND DECALS ASSY.
NAME PLATES
8
4
1
7
2
3
5
10
6
13
12
9
14
PAGE 28 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
11
NAMEPLATES AND DECALS ASSY.
NO. PART NO.
1
920220690
2
920220640
3
920220650
4
920220660
5
920900090
6
920900090
7
920219730
8
920220670
9
920210310
10
920218770
11
920220680
12
920220280
13
920214140
14
PART NAME
QTY. REMARKS
DECAL; E/G RPM/MT-66
1
DECAL; CLEANING ELEMENT
1
DECAL; CAUTIONS 4/SET
1
DECAL; CAUTIONS 6/SET
1
DECAL; SET/MVC-MCD/EXP,EU
1
DECAL; SET/MVC-MCD/EXP,EU
1
DECAL; LEVER OPERATION/MCG
1
DECAL; OPERATION/7LANG
1
DECAL; EC NOISE REQ.LWA107
1
DECAL; E/G FIRE WARNING
1
DECAL; ENGINE CLEANER/MQ
1
DECAL; CHECK DAILY(FILTER)
1
DECAL; WARNING/NON-EPA
1
PLATE; SERIAL NO............................................1................CONTACT MQ PARTS DEPT.
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 29
MT-77HFR
CRANKCASE AND ENGINE ASSY.
CRANK CASE & ENGINE
52-4
53
52-1
54
52-2
63-1
52-3
63-2
63-3
62
90
55
91
63-1
63-2
3
21
5
8
6 9
2
12
7
10
46
47
81
24
17 25
23
22
69
22
40
39
37
70
61
71
42 43
38
33
28-1
44
30 36
43
50
63-3
63-2
63-1
101
34
37
41
28-2
A
57
59-1
59-3
59-1
18 19
92
1
63-3
13
14
27 15
59-3
59-2 58
37
35
29
63-3
63-2
63-1
A
66
64-2
64-1
65
45
PAGE 30 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
48
49
31
CRANKCASE AND ENGINE ASSY.
NO.
1
2
3
5
6
7
8
9
10 12 13 14 15 17
18 19 21 22 23 24 25 27 28-1 28-2 29 30$ 31$ 33$ 34$ 35$ 36$ 37$ 38$ 39$ 40$ 41$ 42$ 43$ 44 45 46 47 48 49 50 PART NO.
374121560 009120204 022611010 374350260 040006207 0600200020 080100720 080200350 080200200 371334730 040006304 080100520 080200200 374468020 374350270 952401450 060404010 041006007 374468030 080200350 080100620 374353300 011208025 030208200 362910060 362341550 362456521 362455620 362455630 050100450 050200100 031110160 032210220 022131008 020310080 096206006 014208020 020408050 956100048 020406040 011206020 952404470 030206150 022130605 959006120 PART NAME
QTY.
REMARKS
CRANKCASE 1
STUD BOLT, 10X50X21
1
FLANGE NUT M10 1
CRANK GEAR 1
BEARING 6207 1
BEARING 6204...................................................1................REPLACES P/N 040006204
STOP RING 1
STOP RING 1
STOP RING 1
CONNECTING ROD 1
BEARING 6304 1
STOP RING 1
STOP RING 1
PINION 1
CLUTCH DRUM 1
WASHER, 8.5X22X3 1
OIL SEAL 1
BEARING 6007Z 2
BEARING SPACER
1
STOP RING 1
STOP RING 1
PACKING, FRONT COVER
1
BOLT, 8X25.........................................................6................REPLACES P/N 001220825
WASHER, LOCK M8 6
THROTTLE LEVER ASSEMBLY........................1................INCLUDES ITEMS W/$
THROTTLE BODY
1
THROTTLE GEAR
1
SLIDER 1
THROTTLE LEVER 1
O-RING 1
O-RING 1
WASHER, FLAT M10 4
CONICAL LOCK WASHER, M10 1
CAP NUT M10 1
NUT M10.............................................................1................REPLACES P/N 020410060
SOCKET HEAD SCREW, 6X6 1
SOCKET HEAD SCREW, 8X20..........................1................REPLACES P/N 096208020
NUT M8
2
THROTTLE WIRE
1
NUT M6
2
BOLT, 6X20.........................................................2................REPLACES P/N 001220620
WASHER, FLAT M6............................................2................REPLACES P/N 031106100
WASHER, LOCK M6 2
CAP NUT M6 2
CLIP 1
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 31
MT-77HFR CRANKCASE AND ENGINE ASSY. (CONTINUED)
CRANK CASE & ENGINE
52-4
53
52-1
54
52-2
63-1
52-3
63-2
63-3
62
90
55
91
63-1
63-2
3
21
5
8
6 9
2
12
7
10
46
47
81
24
17 25
23
22
69
22
40
39
37
70
61
71
42 43
38
33
28-1
44
30 36
43
50
63-3
63-2
63-1
101
34
37
41
28-2
A
57
59-1
59-3
59-1
18 19
92
1
63-3
13
14
27 15
59-3
59-2 58
37
35
29
63-3
63-2
63-1
A
66
64-2
64-1
65
45
PAGE 32 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
48
49
31
CRANKCASE AND ENGINE ASSY. (CONTINUED)
NO.
52-1 52-2 52-3 52-4 53 54 55 57 58 59-1 59-2 59-3 61 62 63-1 63-2 63-3 64-1 64-2 65 66 69 70 71 81 90 91 92 101 PART NO.
374010050 374010100 374010060 374010110 353342400 507010110A 362456610 366348550 952401450 011208025 0401450080 030208200 363342520 363342530 014208020 0401450080 030208200 001520835 033910220 374219630 366461050 0105051040 030210250 2067550101 374010040 374010070 374010080 374010090 912212102 PART NAME
QTY.
REMARKS
COVER, AIR CLEANER 1
ELEMENT, AIR CLEANER 1
PACKING, AIR CLEANER 1
GRIP BOLT, CLEANER 1
INTAKE PIPE 1
CLAMP................................................................2................REPLACES P/N 507010110
ELEMENT/BREATHER 1
CLUTCH ASSEMBLY 1
WASHER, 8.5X22X3 1
BOLT, 8X25.........................................................2................REPLACES P/N 001220825
WASHER, FLAT M8............................................1................REPLACES P/N 031108160
WASHER, LOCK M8 2
LINK PROTECTOR 1
MUFFLER PROTECTOR 1
BOLT, 8X20.........................................................4................REPLACES P/N 001220820
WASHER, FLAT M8............................................4................REPLACES P/N 031108160
WASHER, LOCK M8 4
SOCKET HEAD BOLT, 8X35 4
WASHER, 8.4X15.5X1.6 4
GUARD, RECOIL STARTER 1
COLLAR/GUARD 4
BOLT, 10X40.......................................................2................REPLACES P/N 001111040
WASHER, LOCK M10 2
CLAMP 1
FRONT COVER 1
CLEANER BOLT 1
BASE, AIR CLEANER 1
WASHER, STEPPED/CLEANER
1
ENGINE ASSEMBLY, GXR120RTKRB6 1
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 33
MT-77HFR
SPRING & GUIDE CYLINDER
GUIDE CYLINDER AND SPRING ASSY
4
2
1
33
2
51
52-2
52-1
6
24
30
28
13
31
29
27
7
26
41
26
46
27
5
9
30
8-2
8-1
28
46
31
29
23
21
22
14
15
17
18
16
19
PAGE 34 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
GUIDE CYLINDER AND SPRING ASSY
NO.
1
2
4
5
6
7
8-1 8-2 9
13
14 15 16 17 18 19 21 22 23 24 26 27 28 29 30 31 33 41 46
51 52-1 52-2 PART NO.
366900080 366459910 374353310 371459690 355447250 355447260 001121230 030212300 952404790 366345990 050100900 355214140 953405270 953405260 014210020 014210040 355119020 953405270 953405260 050200950 354446170 050931500 354336352 354442340 011008040 020108060 050201500 354010010 374469820
374219410 012210040 030210250 PART NAME
QTY.
REMARKS
PISTON PIN........................................................1................REPLACES P/N 366460100
PLUG, PISTON PIN
2
PISTON ROD
1
PISTON END
1
STOPPER, UPPER
1
STOPPER, LOWER
1
BOLT 12X30
1
WASHER, LOCK M12 1
WASHER 1
SPRING CYLINDER
1
O-RING 1
FOOT PLATE 1
PLUG 1
PACKING 1
SOCKET HEAD BOLT 10X20.............................4................REPLACES P/N 001521020
SOCKET HEAD BOLT 10X40.............................4................REPLACES P/N 001521040
SLEEVE 1
PLUG 1
PACKING 1
O-RING 1
PIN 2
O-RING 2
BELLOWS CLAMP
2
BAND GUIDE, BELLOWS 2
BOLT 8X40.........................................................2................REPLACES P/N 001220840
NUT M8...............................................................2................REPLACES P/N 020308060
O-RING 1
BELLOWS, ORANGE
1
MAIN SPRING
2
GUIDE CYLINDER 1
BOLT 10X40.......................................................4................REPLACES P/N 001221040
WASHER, LOCK M10 4
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 35
FOOT ASSY
2
3
6
2
3
1
4
5
PAGE 36 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
FOOT ASSY
NO.
1
2
3
4
5
6
PART NO.
8511S 021112140 030212300 009110034 009110035 363343390 PART NAME
QTY.
REMARKS
FOOT ASSEMBLY..............................................1................REPLACES P/N 366910020
NYLON NUT M12...............................................4................REPLACES P/N 022711214
WASHER, LOCK M12 4
BOLT, SQUARE NECK 12X65 2
BOLT, SQUARE NECK 12X95 2
GRIP HANDLEBAR 1
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 37
MT-77HFR
FUEL TANK AND HANDLE ASSY
TANK & HANDLE
2-2
2
57
1
2-1
11
9
8
10
41
51
5
4
3
6
31
32
54
58
55
56
35
21
53
14-1
14-2
24
22 23
10
60
7
63
62
61
14-2
14-1
13-2
12
33
35
52
13-1
32
12
13-2
13-1
PAGE 38 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
34
FUEL TANK AND HANDLE ASSY
NO. PART NO.
PART NAME
QTY.
REMARKS
1
305910037 FUEL TANK ASSEMBLY.....................................1................INCLUDES ITEMS W/#
2# 361910070 CAP ASSEMBLY, FUEL TANK ORANGE...........1................INCLUDES ITEMS W/$
REPLACES P/N 361910021
2-1#$ 353449010 STRAP, OIL TANK 1
2-2#$ 362458350 SUB CAP, BLACK 1
3# 351437785 HOLDER, COCK 1
4# 954406020 PACKING, FUEL TANK 1
5# 954406010 STRAINER, FUEL TANK 1
6# 954300720 FUEL COCK ASSEMBLY 1
7
011008040 BOLT 8X40.........................................................2................REPLACES P/N 001220840
8
030208200 WASHER, LOCK M8 2
9
022710809 NYLON NUT M8 2
10 952401450 WASHER 8.5X22X3 4
11# 363218260 FUEL TANK
1
12 351337070 SHOCK ABSORBER 2
13-1 014210020 SOCKET HEAD BOLT 10X20.............................4................REPLACES P/N 001521020
13-2 033121009 TOOTHED LOCK WASHER B M10 4
14-1 012210020 BOLT 10X20.......................................................4................REPLACES P/N 001221020
14-2 030210250 WASHER, LOCK M10 4
21 374121590 HANDLE 1
22 939010270 STOPPER RUBBER
1
23 030208200 WASHER, LOCK M8 1
24 020108060 NUT M8...............................................................1................REPLACES P/N 020308060
31 959028625 FUEL HOSE 1
32 954406420 HOSE BAND 2
33 16910GB2005 FUEL FILTER 1
34 959028626 FUEL HOSE 1
35 954406420 HOSE BAND
2
41# 954407840 STRAINER 1
51 374121970 TOP COVER 1
52 955010309 CURL CORD 1
53 959026827 RUBBER TUBE 1
54 955010311 TP-22 TACHO/HOUR METER 1
55 955010307 CLIP BELT 1
56 454010020 CLAMP 1
57 507010110A CLAMP................................................................2................REPLACES P/N 507010110
58 009110045 PAN HEAD SCREW 5X15 2
60 366910030 ROLLER ASSEMBLY, W/SCREW.......................1................INCLUDES ITEMS W/&
61& 366217170 ROLLER
2
62& 0017105020 SCREW 5X20.....................................................4................REPLACES P/N 091005020
63& 022610505 FLANGE NUT M5 4
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 39
HONDA GXR120RTKRB6 ENGINE — CYLINDER BARREL ASSY.
PAGE 40 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
HONDA GXR120RTKRB6 ENGINE — CYLINDER BARREL ASSY.
NO.
1
2# 3# 4
5
6
7
8
9
10 12 13 14# 15 16 PART NO.
12000ZDJ305 12201Z0D305 12204Z0D305 12311Z0D000 12355Z0D000 12365Z0D000 15171Z0DV00 15571Z0DV71 15572ZM7000 15721Z0D000 90008ZM7000 90014952000 91202ZE6013 93500030050A 9805655777 PART NAME
QTY.
REMARKS
BARREL ASSEMBLY, CYLINDER......................1................INCLUDES ITEMS W/#
GUIDE ASSEMBLY, EX. VALVE (O.S.) 1
GUIDE, IN. VALVE (O.S.) 1
COVER, HEAD 1
COVER COMPLETE A, BREATHER 1
COVER COMPLETE B, BREATHER 1
PIPE, BREATHER 1
VALVE, OIL OUTLET 1
PLATE, STOPPER 1
TUBE, BREATHER 1
BOLT, 4X10 1
BOLT, FLANGE, 6X14 6
OIL SEAL, 22X35X6 1
SCREW, PAN, 3X5 1
SPARK, PLUG 1
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 41
HONDA GXR120RTKRB6 ENGINE — CRANKCASE CVR. ASSY.
22
9
22
4
20
5
22
15
20
12
3
10
19
14
8
16
18
17
9
11
1
19
6
17
7
13
FR
PAGE 42 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
HONDA GXR120RTKRB6 ENGINE — CRANKCASE CVR. ASSY.
NO.
1
3
4
5& 6$ 7$ 8
9
10 11$ 12 13$ 14$ 15$ 16 17$ 18 19 20 22 PART NO.
11300ZDJ305 11511Z0DV10 15600ZDF000 15625Z0T800 16510ZL8000 16531ZE1000 16541Z0D000 957010602500 90131ZE1000 90451ZE1000 90601ZE1000 90602ZE1000 91001878003 91203ZE0013 91231891003 58176 9425108000 9430108200 9430306100 957010804500 PART NAME
QTY.
REMARKS
COVER ASSEMBLY, CRANKCASE....................1................INCLUDES ITEMS W/$
FLANGE, P.T.O. 1
CAP ASSEMBLY, OIL FILLER............................1................INCLUDES ITEMS W/&
PACKING, OIL FILLER CAP 1
GOVERNOR ASSEMBLY 1
SLIDER, GOVERNOR 1
SHAFT, GOVERNOR ARM 1
BOLT, FLANGE, 6X25.........................................8................REPLACES P/N 90121952000
BOLT, DRAIN PLUG 1
WASHER, THRUST 1
WASHER, DRAIN PLUG 1
CLIP, GOVERNOR HOLDER 1
BEARING, RADIAL BALL 1
OIL SEAL, 22X41X6 1
OIL SEAL, 6X11X4 1
WASHER, FLAT..................................................2................REPLACES P/N 9410106800
PIN, LOCK 1
DOWEL PIN 2
DOWEL PIN 2
BOLT, FLANGE, 8X45 4
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 43
HONDA GXR120RTKRB6 ENGINE — CRANKSHAFT ASSY.
PAGE 44 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
HONDA GXR120RTKRB6 ENGINE — CRANKSHAFT ASSY.
NO.
2
3% PART NO.
13310ZDJ800 91005KS4003 PART NAME
QTY.
REMARKS
CRANKSHAFT COMPLETE...............................1................INCLUDES ITEMS W/%
BEARING, RADIAL BALL 1
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 45
HONDA GXR120RTKRB6 ENGINE — PISTON/CONN. ROD ASSY.
PAGE 46 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
HONDA GXR120RTKRB6 ENGINE — PISTON/CONN. ROD ASSY.
NO.
1
2
3
4
5# 6
PART NO.
13010ZDJ003 13101ZDJ800 13111ZE0000 13200ZDJ000 90001ZDJ000 90551ZE0000 PART NAME
QTY.
REMARKS
RING SET, PISTON STD. 1
PISTON 1
PIN, PISTON 1
ROD ASSEMBLY, CONNECTING......................1................INCLUDES ITEMS W/#
BOLT, CONNECTING ROD, 6X32 2
CLIP, PISTON PIN, 13 MM 2
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 47
HONDA GXR120RTKRB6 ENGINE — CAMSHAFT PULLEY ASSY.
PAGE 48 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
HONDA GXR120RTKRB6 ENGINE — CAMSHAFT PULLEY ASSY.
NO.
1
2
3
4
5
6
7
8
9
10 11 12 13 14 PART NO.
12209KT7013 14320ZDD000 14324Z0D000 14400Z0D003 14431ZDD000 14441ZDD000 14461ZL8000 14711Z0D000 14721Z0D000 14751Z0D000 14771ZM3010 90012333000 90206001000 91301ZM0V31 PART NAME
SEAL, VALVE STEM PULLEY COMPLETE, CAMSHAFT SHAFT, CAM PULLEY BELT, TIMING ARM, INTAKE VALVE ROCKER ARM, EXHAUST VALVE ROCKER SHAFT, ROCKER ARM VALVE, INLET VALVE, EXHAUST SPRING, VALVE
RETAINER, VALVE SPRING SCREW, TAPPET ADJUSTING NUT, TAPPET ADJUSTING O-RING QTY.
1
1
1
1
1
1
2
1
1
2
2
2
2
1
REMARKS
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 49
HONDA GXR120RTKRB6 ENGINE — RECOIL STARTER ASSY.
PAGE 50 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
HONDA GXR120RTKRB6 ENGINE — RECOIL STARTER ASSY.
NO.
1
2
3#
4#
5#
6#
7#
8#
9#
10#
11#
12#
13#
14
PART NO.
28400ZDJ003ZB
28405ZDJ000
28410ZDJ003ZB
28421ZDD003
28422ZG0W02
28433ZG0W02
28441ZW9003
28442ZH8003
28461ZDD003
28462Z0DV03
28467Z0DV02
28468Z0DV02
90003ZH8003
957010601400
PART NAME
QTY.
REMARKS
STARTER ASSEMBLY, RECOIL, BLK................1................INCLUDES ITEMS W/#
SPACER, RECOIL STARTER MOUNTING
1
CASE COMPLETE, RECOIL STARTER, BLK. 1
REEL, RECOIL STARTER, BLK.
1
RATCHET, STARTER
2
GUIDE, RATCHET
1
SPRING, FRICTION...........................................1................REPLACES P/N 28441ZW6003
SPRING, RECOIL STARTER
1
KNOB, RECOIL STARTER
1
ROPE, RECOIL STARTER
1
PLATE, SIDE
1
PLATE, SLIDE
1
SCREW, SETTING
1
BOLT, FLANGE, 6X14
3
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 51
HONDA GXR120RTKRB6 ENGINE — FAN COVER ASSY.
PAGE 52 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
HONDA GXR120RTKRB6 ENGINE — FAN COVER ASSY.
NO.
1
2
4
PART NO.
19610Z0DV00ZB
35120Z0DV81
90014952000
PART NAME
COVER COMPLETE, FAN, BLK.
SWITCH ASSEMBLY, ENGINE STOP
BOLT, FLANGE, 6X14
QTY.
1
1
4
REMARKS
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 53
HONDA GXR120RTKRB6 ENGINE — CARBURETOR ASSY.
14
13
10
20
15
25
1
12
1
24
1
1
5
8
GASKET SET
11
23
9
2
3
1
7
1
1
6
4
22
NOTICE
Gasket set, item 1 included with items 4, 6, 7, and 24.
PAGE 54 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
HONDA GXR120RTKRB6 ENGINE — CARBURETOR ASSY.
NO.
1#%
2# 3# 4# 5# 6# 7# 8# 9
10# 11# 12# 13 14 15 20# 22# 23# 24# 25# PART NO.
16010Z4EW51
16011ZDJ851
16013ZG0811
16015Z4EW51
16016Z0DV21
16024124760
16028ZC0005
16044Z0DV21
16100ZDJ841
16124ZE0005
16166ZDJ851
16199Z0DV21
16211Z0D010
16212Z0DV20
16221ZG0801
938920401208
950030501931
99101ZG00600
99204ZE00350
90602921000
PART NAME
QTY.
REMARKS
GASKET SET
1
VALVE SET, FLOAT
1
FLOAT SET
1
CHAMBER SET, FLOAT.....................................1................INCLUDES ITEMS W/%
SCREW SET
1
SCREW SET, DRAIN..........................................1................INCLUDES ITEMS W/%
SCREW SET.......................................................1................INCLUDES ITEMS W/%
LEVER SET, CHOKE
1
CARBURETOR ASSEMBLY...............................1................INCLUDES ITEMS W/#
SCREW, THROTTLE STOP
1
NOZZLE, MAIN
1
TUBE, AIR VENT
1
INSULATOR, CARBURETOR
1
PACKING, INSULATOR
1
PACKING, CARBURETOR
1
SCREW-WASHER, 4X12.................................. 4................REPLACES P/N 938920401218
TUBE, VINYL
1
JET, MAIN
1
JET SET, PILOT..................................................1................INCLUDES ITEMS W/%
CLIP, TUBE
1
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 55
HONDA GXR120RTKRB6 ENGINE — AIR CLEANER ASSY.
PAGE 56 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
HONDA GXR120RTKRB6 ENGINE — AIR CLEANER ASSY.
NO.
2
4
6
7
11 12 13 15 16 PART NO.
17211ZL8023
17220Z0DV21
17228Z0DV21
17231Z0DV62
90011Z0D000
90041Z0DV20
90042Z0DV20
9405005000
9405006000
PART NAME
ELEMENT, AIR CLEANER
CASE COMPLETE, AIR CLEANER
PACKING, AIR CLEANER
COVER, AIR CLEANER
BOLT, AIR CLEANER COVER
BOLT, STUD
BOLT, STUD, 5X75
NUT, FLANGE, 5 MM
NUT, FLANGE, 6 MM
QTY.
1
1
1
1
2
1
2
2
1
REMARKS
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 57
HONDA GXR120RTKRB6 ENGINE — MUFFLER ASSY.
PAGE 58 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
HONDA GXR120RTKRB6 ENGINE — MUFFLER ASSY.
NO.
1
2
3
4
5
6
PART NO.
18310ZDJ000
18320ZDJ000
18381Z0D000
90014952000
90048ZDJ000
90343ZE6000
PART NAME
QTY.
MUFFLER COMPLETE (RAMMER)
1
PROTECTOR COMP., MUFFLER (RAMMER) 1
GASKET, MUFFLER
1
BOLT, FLANGE, 6X14
3
BOLT, STUD, 6X56.5
2
NUT, SELF-LOCK, 6 MM
2
REMARKS
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 59
GXR120RT-KRB6
FLYWHEEL
/ IGNITION ENGINE
COIL
HONDA
GXR120RTKRB6
— FLYWHEEL IGNITION ASSY.
6
4
8
9
9
5
7
3
1
2
10
FR
PAGE 60 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
HONDA GXR120RTKRB6 ENGINE — FLYWHEEL IGNITION ASSY.
NO.
1
2
3
4
5# 6
7
8
9
10 PART NO.
13331357000
28451ZDJ003
30500Z0DV02
30564ZA5000
30700Z0DV01
30701883000
31110ZDJ003
32195Z0D000
90022888010
90201Z0T800
PART NAME
QTY.
REMARKS
KEY, SPECIAL WOODRUFF, 25X18
1
PULLEY, STARTER
1
COIL ASSEMBLY, IGNITION..............................1................INCLUDES ITEMS W/ #
GROMMET, CORD
1
TERMINAL ASSEMBLY, HIGH TENSION
1
CLIP, HIGH TENSION CORD
1
FLYWHEEL COMPLETE
1
CORD, STOP SWITCH
1
BOLT, FLANGE, 6X20
2
NUT, SPECIAL, 14 MM
1
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 61
HONDA GXR120RTKRB6 ENGINE — CONTROL ASSY.
PAGE 62 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
HONDA GXR120RTKRB6 ENGINE — CONTROL ASSY.
NO.
1
5
6
7
8
9& 11 12 13& 14& 15& 17& 19 20$ PART NO.
16500Z0DV50
16550Z0DV21
16555Z0DV20
16561ZDJ800
16562Z0DV20
16594883010
90014952000
90015Z5T000
90605230000
92301050220A
0043504060
94001050000S
9405006000
16263883W10
PART NAME
QTY.
REMARKS
CONTROL ASSEMBLY......................................1................INCLUDES ITEMS W/ &
ARM COMPLETE, GOVERNOR........................1................INCLUDES ITEMS W/ $
ROD, GOVERNOR
1
SPRING, GOVERNOR
1
SPRING, THROTTLE RETURN
1
HOLDER, WIRE
1
BOLT, FLANGE, 6X14
2
BOLT, GOVERNOR ARM
1
CIRCLIP, 5 MM
1
BOLT, RECESSED, 5X20...................................1................REPLACES P/N 92301050200A
SCREW, PAN, 4X6.............................................1................REPLACES P/N 93500040060H
NUT, HEX., 5 MM
1
NUT, FLANGE, 6 MM
1
JOINT, ROD
1
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 63
HONDA GXR120RTKRB6 ENGINE — LABELS ASSY.
6
7
3
5
8
PAGE 64 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
HONDA GXR120RTKRB6 ENGINE — LABELS ASSY.
NO.
3
5
6
7
8
PART NO.
87516ZDD000
87521ZDJ000
87528Z0D000
87539Z0J000
87601ZDJV20
PART NAME
QTY.
MARK, OPERATOR CAUTION (ENGLISH) 1
EMBLEM
1
MARK, CHOKE INDICATION
1
MARK, EX. CAUTION (ENGLISH)
1
MARK, TYPE (KRB6)
1
REMARKS
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 65
TERMS AND CONDITIONS OF SALE — PARTS
PAYMENT TERMS
5.
Parts must be in new and resalable
condition, in the original Multiquip
package (if any), and with Multiquip part
numbers clearly marked.
6.
The following items are not returnable:
Multiquip reserves the right to quote and
sell direct to Government agencies, and to
Original Equipment Manufacturer accounts
who use our products as integral parts of their
own products.
a.
SPECIAL EXPEDITING SERVICE
Terms of payment for parts are net 30 days.
FREIGHT POLICY
All parts orders will be shipped collect or
prepaid with the charges added to the invoice.
All shipments are F.O.B. point of origin.
Multiquip’s responsibility ceases when a
signed manifest has been obtained from the
carrier, and any claim for shortage or damage
must be settled between the consignee and
the carrier.
b.
MINIMUM ORDER
The minimum charge for orders from Multiquip
is $15.00 net. Customers will be asked for
instructions regarding handling of orders not
meeting this requirement.
RETURNED GOODS POLICY
Return shipments will be accepted and
credit will be allowed, subject to the following
provisions:
1.
A Returned Material Authorization
must be approved by Multiquip prior to
shipment.
2.
Obsolete parts. (If an item is in the
price book and shows as being
replaced by another item, it is
obsolete.)
Any parts with a limited shelf life
(such as gaskets, seals, “O” rings,
and other rubber parts) that were
purchased more than six months
prior to the return date.
c.
Any line item with an extended
dealer net price of less than
$5.00.
d.
Special order items.
e.
Electrical components.
f.
Paint, chemicals, and lubricants.
g.
Decals and paper products.
h.
Items purchased in kits.
7.
The sender will be notified of any material
received that is not acceptable.
To obtain a Return Material Authorization,
a list must be provided to Multiquip
Parts Sales that defines item numbers,
quantities, and descriptions of the items
to be returned.
8.
Such material will be held for five
working days from notification, pending
instructions. If a reply is not received
within five days, the material will be
returned to the sender at his expense.
a.
The parts numbers and descriptions
must match the current parts price
list.
9.
b.
The list must be typed or computer
generated.
Credit on returned parts will be issued
at dealer net price at time of the original
purchase, less a 15% restocking
charge.
c.
The list must state the reason(s)
for the return.
d.
The list must reference the sales
order(s) or invoice (s) under
which the items were originally
purchased.
e.
The list must include the name
and phone number of the person
requesting the RMA.
3.
A copy of the Return Material Authorization
must accompany the return shipment.
4.
Freight is at the sender’s expense. All
parts must be returned freight prepaid to
Multiquip’s designated receiving point.
10. In cases where an item is accepted, for
which the original purchase document
can not be determined, the price will be
based on the list price that was effective
twelve months prior to the RMA date.
A $35.00 surcharge will be added to the
invoice for special handling including bus
shipments, insured parcel post or in cases
where Multiquip must personally deliver the
parts to the carrier.
LIMITATIONS OF SELLER’S LIABILITY
Multiquip shall not be liable hereunder for
damages in excess of the purchase price of
the item with respect to which damages are
claimed, and in no event shall Multiquip be
liable for loss of profit or good will or for any
other special, consequential or incidental
damages.
LIMITATION OF WARRANTIES
No warranties, express or implied, are
made in connection with the sale of parts or
trade accessories nor as to any engine not
manufactured by Multiquip. Such warranties
made in connection with the sale of new,
complete units are made exclusively by a
statement of warranty packaged with such
units, and Multiquip neither assumes nor
authorizes any person to assume for it
any other obligation or liability whatever in
connection with the sale of its products. Apart
from such written statement of warranty,
there are no warranties, express, implied or
statutory, which extend beyond the description
of the products on the face hereof.
Effective: February 22, 2006
11. Credit issued will be applied to future
purchases only.
PRICING AND REBATES
Prices are subject to change without prior
notice. Price changes are effective on a
specific date and all orders received on or
after that date will be billed at the revised price.
Rebates for price declines and added charges
for price increases will not be made for stock
on hand at the time of any price change.
PAGE 66 — MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17)
NOTES
MT77HFR RAMMER • OPERATION AND PARTS MANUAL — REV. #0 (06/08/17) — PAGE 67
OPERATION AND PARTS MANUAL
HERE’S HOW TO GET HELP
PLEASE HAVE THE MODEL AND SERIAL
NUMBER ON-HAND WHEN CALLING
UNITED STATES
Multiquip Corporate Office
18910 Wilmington Ave.
Carson, CA 90746
Contact: mq@multiquip.com
MQ Parts Department
Tel. (800) 421-1244
Fax (310) 537-3927
800-427-1244
310-537-3700
Service Department
Warranty Department
800-421-1244
310-537-3700
800-421-1244
310-537-3700
Fax: 800-672-7877
Fax: 310-943-2249
Technical Assistance
800-478-1244
Fax: 310-943-2238
CANADA
UNITED KINGDOM
Multiquip
Multiquip (UK) Limited Head Office
4110 Industriel Boul.
Laval, Quebec, Canada H7L 6V3
Contact: infocanda@multiquip.com
Tel: (450) 625-2244
Tel: (877) 963-4411
Fax: (450) 625-8664
Unit 2, Northpoint Industrial Estate,
Globe Lane,
Dukinfield, Cheshire SK16 4UJ
Contact: sales@multiquip.co.uk
Tel: 0161 339 2223
Fax: 0161 339 3226
© COPYRIGHT 2017, MULTIQUIP INC.
Multiquip Inc, the MQ logo and the Mikasa logo are registered trademarks of Multiquip Inc. and may not be used, reproduced, or altered without written permission. All other trademarks
are the property of their respective owners and used with permission.
This manual MUST accompany the equipment at all times. This manual is considered a permanent part of the equipment and should remain with the unit if resold.
The information and specifications included in this publication were in effect at the time of approval for printing. Illustrations, descriptions, references and technical data contained in
this manual are for guidance only and may not be considered as binding. Multiquip Inc. reserves the right to discontinue or change specifications, design or the information published
in this publication at any time without notice and without incurring any obligations.
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