MQ Multiquip Mikasa Series Guide

OPERATION AND PARTS MANUAL
THIS MANUAL MUST ACCOMPANYTHE EQUIPMENT AT ALLTIMES.
To find the latest revision of this
publication, visit our website at:
www.multiquip.com
SERIES
MODEL MT55F
TAMPING RAMMER
(ROBIN EH090D/EH092D GASOLINE ENGINES)
Revision #4 (11/14/07)

PAGE 2 — MT55F — OPERATION AND PARTS MANUAL — REV. #4 (11/14/07)

MT55F — OPERATION AND PARTS MANUAL — REV. #4 (11/14/07) — PAGE 3
NOTE PAGE

PAGE 4 — MT55F — OPERATION AND PARTS MANUAL — REV. #4 (11/14/07)
TABLE OF CONTENTS
ROBIN EH-090D45050
ENGINE
Crankcase Assembly ......................................... 40-41
Crankshaft and Piston Assembly ....................... 42-43
Intake and Exhaust Assembly ............................ 44-45
Governor Assembly ........................................... 46-47
Blower Housing and Recoil Starter Assembly ... 48-49
Carburetor Assembly ......................................... 50-51
Electric Device Assembly ................................... 52-53
ROBIN EH-092D45010
ENGINE
Crankcase Assembly ........................................ 54-55
Crankshaft and Piston Assembly ...................... 56-57
Intake and Exhaust Assembly ........................... 58-59
Carburetor Assembly ........................................
60-61
Air Cleaner Assembly........................................ 62-63
Governor, Operation Assembly......................... 64-65
Blower Housing Assembly ................................ 66-67
Recoil Starter Assembly.................................... 68-69
Accessories Assembly ...................................... 70-71
Terms and Condition Of Sale —Parts .................... 72
MT-55F Tamping
Rammer
Here's How To Get Help ............................................3
Table Of Contents .....................................................4
Parts Ordering Procedures .......................................5
Safety Message Alert Symbols ............................. 6-7
Rules For safe Operation ..................................... 8-9
Operation and Safety Decals ..................................10
General Information ................................................12
Specifications ..........................................................13
Controls and Components ......................................14
Basic Engine ...........................................................15
Operation .......................................................... 16-19
Maintenance ...........................................................20
Troubleshooting Guide ...................................... 22-23
Explanation Of Codes In Remarks Column ............24
Suggested Spare Parts ...........................................25
Name Plate and Decals .................................... 26-27
Crankcase and Engine Assembly ..................... 28-29
Guide Cylinder Assembly .................................. 30-31
Tank and Handle Assembly .............................. 32-33
Foot Assembly .................................................. 34-35
Narrow Foot Assembly (Option) ....................... 36-37
Trench Shoe Assembly (Option) ....................... 38-39
Specification and part number are
subject to change without notice.
NOTE

MT55F — OPERATION AND PARTS MANUAL — REV. #4 (11/14/07) — PAGE 5
PARTS ORDERING PROCEDURES
PARTS ORDERING PROCEDURES
PARTS ORDERING PROCEDURES
Ordering parts has never been easier!
Choose from three easy options:
WE ACCEPT ALL MAJOR CREDIT CARDS!
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
Allordersaretreatedas StandardOrders
andwillshipthesamedayifreceivedprior
to 3PM PST.
If you have an MQ Account, to obtain a
Username and Password, E-mail us at:
[email protected].
To obtain an MQ Account, contact your
District Sales Manager for more information.
Order via Internet (Dealers Only):
Order parts on-line using Multiquip’s SmartEquip website!
■ View Parts Diagrams
■ Order Parts
■ Print Specification Information
Note: Discounts Are Subject To Change
Goto www.multiquip.com and click on
Order Parts to log in and save!
Use the
internet and qualify for a 5% Discount
on
Standard orders for all orders which include
complete part numbers.*
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.*
Order via Phone: Domestic (US) Dealers Call:
1-800-427-1244
Best Deal!
International Customers should contact
their local Multiquip Representatives for
Parts Ordering information.
Non-Dealer Customers:
Contact your local Multiquip Dealer for
parts or call 800-427-1244 for help in
locating a dealer near you.
Note: Discounts Are Subject To Change
NOTE
Effective: January 1st, 2006

PAGE 6 — MT55F — OPERATION AND PARTS MANUAL — REV. #4 (11/14/07)
MT55F — SAFETY MESSAGE ALERT SYMBOLS
Lethal Exhaust Gases
HAZARD SYMBOLS
Potential hazards associated with the operation of a
MT-55F Tamping Rammer will be referenced with Hazard
Symbols which appear throughout this manual, and will be
referenced in conjunction with Safety Message Alert
Symbols.
Engine exhaust gases contain
poisonous carbon monoxide. This gas
is colorless and odorless, and can
cause death if inhaled. NEVER operate
this equipment in a confined area or
enclosed structure that does not provide
ample free flow air.
Gasoline is extremely flammable, and
its vapors can cause an explosion if
ignited. DO NOT start the engine near
spilled fuel or combustible fluids.
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 approved containers, in
well-ventilated areas and away from sparks and flames.
Engine components can generate extreme
heat. To prevent burns, DO NOT touch
these areas while the engine is running or
immediately after operations. Never
operate the engine with heat shields or heat
guards removed.
ALWAYS wear approved respiratory
protection when required.
Lethal Exhaust Gas Hazards
WARNINGWARNING
WARNINGWARNING
WARNING
Explosive Fuel Hazards
WARNINGWARNING
WARNINGWARNING
WARNING
Burn Hazards
WARNINGWARNING
WARNINGWARNING
WARNING
Respiratory Hazards
WARNINGWARNING
WARNINGWARNING
WARNING
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.
FOR YOUR SAFETY AND THE SAFETY OF OTHERS!
This Owner's Manual has been
developed to provide complete
instructions for the safe and efficient
operation of the MQ Mikasa Model
MT-55F Tamping Rammer. Refer to
the engine manufacturers instructions
for data relative to its safe operation.
SAFETY MESSAGE ALERT SYMBOLS
The three (3) 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 three words: DANGER,
NOTE
You WILL be KILLED or SERIOUSLY INJURED
if you DO NOT follow these directions.
You CAN be KILLED or
SERIOUSLY INJURED if
you DO NOT follow these directions.
You CAN be
INJURED if you DO NOT follow
these directions.
CAUTICAUTI
CAUTICAUTI
CAUTION
DANGERDANGER
DANGERDANGER
DANGER
WARNINGWARNING
WARNINGWARNING
WARNING
Before using this rammer,ensure that the operating
individual has read and understands all instructions in this
manual.

MT55F — OPERATION AND PARTS MANUAL — REV. #4 (11/14/07) — PAGE 7
MT55F — SAFETY MESSAGE ALERT SYMBOLS
ALWAYS place the ON/OFF switch in
the OFF position when the rammer is
not in use.
ALWAYS wear approved eye and
hearing protection.
NEVER operate equipment with covers,
or guards removed. Keep fingers, hands,
hair and clothing away from all moving
parts to prevent injury.
Rotating Parts Hazards
CAUTIONCAUTION
CAUTIONCAUTION
CAUTION
Accidental Starting Hazards
CAUTIONCAUTION
CAUTIONCAUTION
CAUTION
Eye and Hearing Hazards
CAUTIONCAUTION
CAUTIONCAUTION
CAUTION
Other important messages are provided throughout this
manual to help prevent damage to your light tower, other
property, or the surrounding environment.
Equipment Damage
Hazards
CAUTIONCAUTION
CAUTIONCAUTION
CAUTION
NEVER refuel rammer when placed in truck bed with
plastic liner.The possibility exists of explosion due to static
electricity. When adding fuel, remove rammer from truck
bed and place on ground.
Refueling Hazard
DANGERDANGER
DANGERDANGER
DANGER

PAGE 8 — MT55F — OPERATION AND PARTS MANUAL — REV. #4 (11/14/07)
MT55F — RULES FOR SAFE OPERATION
The following safety guidelines should always be used when
operating the MT-55F Tamping Rammer:
GENERAL SAFETY
■ DO NOT operate or service this
equipment before reading this entire
manual.
■ This equipment should not be operated by persons under
18 years of age.
■ NEVER operate this equipment without proper protective
clothing, shatterproof glasses, steel-toed boots and other
protective devices required by the job.
■ High Temperatures – Allow the engine to cool before
adding fuel or performing service and maintenance
functions. Contact with
hot! components can cause serious
burns.
■ The engine section of this rammer requires an adequate
free flow of cooling air.
NEVER operate the rammer in
any enclosed or narrow
area where free flow of the
air is restricted. If the air
flow is restricted it will
cause serious damage to
the rammer or engine and
may cause injury to people.
Remember the rammer's
engine gives off
DEADLY
carbon monoxide gas.
■ ALWAYS refuel in a well-ventilated area, away from
sparks and open flames.
■ ALWAYS use extreme caution when working with
flammable liquids. When refueling, stop the engine and
allow it to cool. DO NOT smoke around
or near the machine. Fire or explosion
could result from fuel vapors, or if fuel
is spilled on a hot engine.
■ NEVER operate the rammer in an
explosive atmosphere or near
combustible materials. An explosion or fire could result
causing severe bodily harm or even death.
DANGERDANGER
DANGERDANGER
DANGER
Failure to follow instructions in this manual may lead
to serious injury or even death! This equipment is to
be operated by trained and qualified personnel only!
This equipment is for industrial use only.
■ NEVER operate this equipment under the influence of
drugs or alcohol .
Read this manual!
■ NEVER touch the hot exhaust
manifold, muffler or cylinder. Allow
these parts to cool before servicing
engine or rammer.
■ ALWAYS wear proper respiratory (mask),
hearing and eye protection equipment when
operating the rammer.
■ 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.
■ NEVER use accessories or attachments, which are not
recommended by Multiquip for this equipment. Damage
to the equipment and/or injury to user may result.
■ NEVER operate this equipment when not
feeling well due to fatigue, illness or taking
medicine.
■ Topping-off to filler port is dangerous, as it tends to spill
fuel.
■ Stop the engine when leaving the rammer unattended.
■ Maintain this equipment in a safe operating condition at
all times.
■ DO NOT smoke around or near the
machine. Fire or explosion could result
from fuel vapors, or if fuel is spilled on a
hot engine.

MT55F — OPERATION AND PARTS MANUAL — REV. #4 (11/14/07) — PAGE 9
MT55F — RULES FOR SAFE OPERATION
■ ALWAYS stop the engine before servicing, adding fuel
and oil.
■ NEVER run engine without air filter. Severe engine may
occur.
■ ALWAYS service air cleaner frequently to prevent
carburetor malfunction.
■ ALWAYS check the machine for loosened threads or bolts
before starting.
■ ALWAYS be sure the operator is familiar with proper safety
precautions and operations techniques before using
rammer.
■ 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.
■ DO NOT operate this equipment unless all guards and
safety devices are attached and in place.
■ CAUTION must be exercised while servicing this
equipment. Rotating and moving parts can cause injury
if contacted.
■ Keep all inexperienced and unauthorized people away
from the equipment at all times.
■ Unauthorized equipment modifications will void all
warranties.
■ NEVER pour or spray water over the engine.
■ Test the engine ON /OFF switch before operating. The
purpose of this switch is to shut down the engine of the
rammer.
■ Refer to the ROBIN Engine Owner's Manual for engine
technical questions or information recommended by
Multiquip for this equipment.
TRANSPORTING
■ ALWAYS shutdown engine before transporting.
■ Tighten fuel tank cap securely and close fuel cock to
prevent fuel from spilling.
■ Drain fuel when transporting rammer over long distances
or bad roads.
■ When placing the rammer inside a truck-bed for transport,
always tie-down the rammer
MAINTENANCE
■ NEVER lubricate components or attempt service on a
running rammer.
■ ALWAYS allow the rammer a proper amount of time to
cool before servicing.
■ Keep the rammer in proper running condition.
■ Fix damage to the rammer immediately and always
replace broken parts.
■ 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.
■ In emergencies 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.
EMERGENCIES
■ ALWAYS know the location of the nearest fire
extinguisher and first aid kit.

PAGE 10 — MT55F — OPERATION AND PARTS MANUAL — REV. #4 (11/14/07)
MT55F — OPERATION AND SAFETY DECALS

MT55F — OPERATION AND PARTS MANUAL — REV. #4 (11/14/07) — PAGE 11
NOTE PAGE

PAGE 12 — MT55F — OPERATION AND PARTS MANUAL — REV. #4 (11/14/07)
Definition of Tamping Rammer
The Mikasa MT55F 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 MT55F levels and uniformly compacts
voids between soil particles to increase dry density.
Circular motion is converted to create impact force. The
MT55F tamping rammer develops a powerful compacting
force at the foot of the rammer. To maintain optimum
performance, proper operation and service are essential.
Construction of Tamping Rammer
The Mikasa MT55F is equipped with an air cooled, two cycle
gasoline engine. Transmission of the power takes place by
increasing the engine speed to engage the centrifugal clutch.
Rammer Gearbox and Spring Cylinder
The Mikasa MT55F uses an oil bath lubrication system.
Always check the oil level through the oil level sight glass at
the rear of the tamper foot.
Controls
Before starting the MT55F Tamping Rammer identify and
understand the function of the controls, see Figure 1 on
page 13.
MT55F — GENERAL INFORMATION
Handle Operation
CAUTIONCAUTION
CAUTIONCAUTION
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.

MT55F — OPERATION AND PARTS MANUAL — REV. #4 (11/14/07) — PAGE 13
MT55F — SPECIFICATIONS
NOTE Specifications are general and are subject to change without notice. If exact
measurements are required, equipment should be weighed and measured.
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PAGE 14 — MT55F — OPERATION AND PARTS MANUAL — REV. #4 (11/14/07)
Figure 1 shows the location of the controls and components
for the MT55F Tamping Rammer.The functions of each control
is described below:
L1. A Returned Material Authorization must be approved by Multiquip prior to shipment. A copy of the Authorization must
accompany the shipment to the designated Warehouse. A copy of the original Multiquip invoice to the customer must
also accompany the shipment.
1. 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.
2. Fuel Shut-OffValve – Supplies fuel from the fuel tank to
the engine.To begin fuel flow move the fuel shut-off valve
downward.
3. Oil Bath Fill Plug – Open this plug to add oil to the oil
bath reservoir.
4. Drain Valve – Open this valve to remove oil from the
bellows.
5. Primary Air Cleaner – Pre-cleans (first stage) dirt and
other debris from entering the engine.
6. Foot– Laminated wood with tempered steel plate for
superior shock absorption.
7. Oil Level Sight Glass – Indicates the level of oil in the oil
bath reservoir.
Figure 1. MT55F Rammer
MT55F — CONTROLS AND COMPONENTS
8. FuelTank/Cap –Remove this cap to add unleaded gaso-
line to the fuel tank.Make sure cap is tightened securely.DO
NOT over fill.
9. Bellows – Reservoir for oil bath.
10. Handle – To operate rammer GRIP handle assembly
firmly on both sides.
11. Nameplate – Displays information regarding the rammer.
12. Engine Air Cleaner – Prevents dirt (second stage) and
other debris form entering the engine.
13. Muffler – Used to reduce noise and emissions.
CAUTION - Fueling The Engine
Adding fuel to the tank should be done 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,

MT55F — OPERATION AND PARTS MANUAL — REV. #4 (11/14/07) — PAGE 15
MT55F — BASIC ENGINE
Figure 2. Engine Controls and Components
INITIAL SERVICING
The engine (Figure 2) must be checked for proper lubrication and
filled with fuel prior to operation. Refer to the manufacturers Engine
manual for instructions & details of operation and servicing.
1. Secondary Air Cleaner – Prevents dirt and other debris
from entering the fuel system. Remove wing-nut on top of
air filter cannister to gain access to filter element.
2. Choke Lever –Used when starting the engine. Normally
used in cold weather conditions. In cold weather turn the
choke lever to the fully closed position, in warm weather
set choke lever half way or completely open.
3. Spark Plug – Provides spark to the ignition system. Set
spark plug gap to 0.02 - 0.03 inch (0.6 - 0.7 mm). Clean
spark plug once a week.
4. Engine ON/OFF Switch – Controls the starting and
stopping of the engine. Switch must be in the "ON" position
when starting the engine.
7. 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.
8. Oil Drain Plug – Remove this plug to remove oil from the
engine's crankcase.
5. Recoil Starter (pull rope) – Manual-starting method. Pull
the starter grip until resistance is felt, then pull briskly and
smoothly.
6. Muffler – Used to reduce noise and emissions.
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,
NOTE
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.
CAUTION - Burn Hazard

PAGE 16 — MT55F — OPERATION AND PARTS MANUAL — REV. #4 (11/14/07)
Rammer Gearbox and Spring Cylinder Oil Bath
This unit uses an oil bath lubrication system. Perform the following:
1. Check the oil level through the oil level sight glass (Figure 3)
at the rear of the tamper foot.
This section is intended to assist the operator with the initial
start-up of the MT55F Tamping Rammer. It 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.
Engine Oil Check
1. To check the engine oil level, place the rammer on secure
level ground with the engine stopped.
2. Remove the filler cap/dipstick from the engine oil filler hole
(Figure 5) and wipe it clean.
Figure 3. Foot Housing Sight Glass
2. If oil is not visible, add 10W-30 SE, SF or higher grade motor
oil into the oil fill plug opening (Figure 3).The bath contains
approximately 1.0 pints (520 cc.)
Figure 4. Fuel Tank
Fuel
1. Fill the fuel tank (Figure 4) with unleaded gasoline. DO NOT
overfill, wipe up spilled fuel immediately.
MT55F — OPERATION
Figure 5. Engine Oil Dipstick
3. Insert and remove thedipstickwithoutscrewingitinto the filler
neck. Check the oil level shown on the dipstick.
4. If the oil level is low (Figure 6), fill to the edge of the oil filler
hole with the recommended oil type (Table 3).Maximum oil
capacity is .079 gallons (0.3 liters)
DO NOT attempt to operate the Tamping
Rammer until the Safety, General
Information and Inspection sections of this
manual have been
read and thoroughly
understood
.
CAUTION - Read Manual
The oil level should be kept at the half
way point of the sight glass.
NOTE

MT55F — OPERATION AND PARTS MANUAL — REV. #4 (11/14/07) — PAGE 17
Inspection
1. Check all nuts, bolts fasteners for tightness. Retighten as
necessary.
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.
Figure 8. On Off Switch
Figure 7. Fuel Shut-Off Valve (ON)
2. Set the engine ON/OFF switch (Figure 8) to the "ON"
position (start).
3. Move the throttle lever to the "IDLE" position (Figure 9).
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MT55F — OPERATION
Figure 6. Engine Oil Dipstick (Oil Level)
Initial Start-up
When starting the MT55F Tamping Rammer perform the
following:
1. Open the fuel shut- off valve by moving the fuel cock
lever to the open position (Figure 7).

PAGE 18 — MT55F — OPERATION AND PARTS MANUAL — REV. #4 (11/14/07)
MT55F — OPERATION
Figure 9. Throttle Lever (Idle)
Figure 10. Choke Lever (Closed)
Figure 11. Recoil Starter
4. In cold weather, start the unit with choke lever "Fully
Closed"(Figure 10). In warm weather or when the engine is
warm, the unit can be started with choke halfway or com-
pletely
open .
5. Grip the recoil starter (Figure 11) handle and pull it until you
feel a slight resistance.Then pull sharply and quickly.Return
the recoil starter handle to the starter case before releasing.
6. If engine fails to start, move the choke lever (Figure 10) to the
half open position to avoid flooding.
7. Repeat steps 1 thru 6.
8. If the engine does not start after repeated attempts,
check the spark plug for excess fuel.Clean and replace
the spark plug as needed.
Operation
1. To start the rammer tamping action, move the throttle lever
(Figure 12)
quickly from IDLE (close) to the FULL OPEN
position . DO NOT move the throttle lever slowly as this may
cause damage to the clutch or spring.
Figure 12. Throttle Lever (Full Open)

MT55F — OPERATION AND PARTS MANUAL — REV. #4 (11/14/07) — PAGE 19
2. Close the fuel shut- off valve (Figure 15) by moving the fuel
cock lever to the CLOSED position.
Emergency Showdown
1. Move the throttle lever quickly to the IDLE position, and turn
the engine start/stop switch to the
OFF position. Turn fuel
valve lever to the
CLOSED position.
Figure 15. Fuel Shut-OFF Valve (Off Position)
Figure 14. ON/OFF Switch (Off Position)
2. After the engine cools ,turntheenginestart/stopswitchto the
“OFF” position (Figure 14).
MT55F — OPERATION
2. The MT55F Tamping rammer is designed to run at 3,600 rpm.
At optimum rpm the foot hits at the rate between 600 ~ 695
impacts per minute. Increasing throttle speed past factory
set rpm does not increaseimpacts and may damage unit.The
MT55F is designed to advance while tamping. For faster
advance, pull back slightly on the handle so that rear of foot
contacts soil first.
Figure 13. Throttle Lever (Idle)
Stopping The Engine
Normal Shutdown
1. Move throttle lever quickly from the FULL OPEN to IDLE
position (Figure 13) and run the engine for three minutes at
low speed.
Make sure that the throttle lever is moved to the FULL OPEN
position. Operating the rammer at less than full speeds can result
in damage to the clutch springs or foot
CAUTION -Throttle Lever

PAGE 20 — MT55F — OPERATION AND PARTS MANUAL — REV. #4 (11/14/07)
Maintenance
Perform the scheduled maintenance procedures as indicated:
DAILY
■ Thoroughly remove dirt and oil from the engine and control
area. 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.
WEEKLY
■ Remove the fuel filter cap and clean the inside of the fuel
tank.
■ Remove or clean the filter at the bottom of the tank.
■ Remove and clean the spark plug, then adjust the spark gap
to 0.02~0.03 inch (0.6~0.7 mm). This unit has electronic
ignition, which requires no adjustments.
■ Clean air cleaner cover.
200 - 300 HOURS (Pre-Cleaner)
■ Remove the element from the pre-cleaner (Figure 16) at the
top of the crankcase (body side) and clean it with cleaning oil
(kerosene).
MT55F — MAINTENANCE
Figure 16. Primary Air Filter
■ Lubricate the top element (yellow) with 2~5 cc of engine oil
SAE-30.
■ Lubricate bottom element (gray) with 7~9 cc of engine oil
SAE-30 and completely squeeze out the excess oil from the
element before installing.
■ The air cleaner (Figure 17 ) on the engine side will hardly be
contaminated, if it is, clean the outer foam gray element with
cleaning solvent. Tightly squeeze outer foam element to
remove any excess solvent before re-installing.
200 - 300 HOURS (Oil Bath)
■ Drain oil reservoir on foot housing (Figure 18). Refill with
approximately 1.0 pt. (520 cc.) of 10W-30 SE, SF or higher
grade motor oil. Oil should be midway in sight glass. Break in
oil should be changed after first 50 hours.
Figure 17. Engine Air Cleaner
Yearly
■ Check the fuel line and the oil line regularly for damage and
to ensure that there are no leaks.
■ Replace the oil and fuel lines every two years to maintain the
performance and flexibility lines.
Long Term Storage
■ Drain fuel from fuel tank, fuel line and carburetor.
■ Remove spark plug and pour a few drops of motor oil into
cylinder. Crank engine 3 to 4 times so that oil reaches all
internal parts.
■ Clean exterior with a cloth soaked in clean oil.
■ Store unit covered with plastic sheet in moisture free and
dust free location out of direct sunlight
Figure 18. Foot Housing Drain Plug
■ Tap the paper filter element (Figure 17 ) several times on a
hard surface to remove dirt, or blow compressed air [not
exceeding 30 psi (207 kPa, 2.1 kgf/cm2)] through the filter
element from the air cleaner case side.
NEVER brush off dirt.
Brushing will force dirt into the fibers. Replace the paper filter
element if it is excessively dirty.
GRAY OUTER
FOAM ELEMENT
CLEAN WITH
KEROSENE
PAPER
ELEMENT
CLEAN WITH
COMPRESSED
AIR