MQ Multiquip Mikasa MTX70HF User manual

OPERATION MANUAL
THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
SERIES
MODEL MTX70HF
TAMPING RAMMER
(HONDA GX100RTKRB5 GASOLINE ENGINE)
Revision #3 (06/18/20)
To find the latest revision of this publication or
associated parts manual, visit our website at:
www.multiquip.com

PAGE 2 — MTX70HF RAMMER • OPERATION MANUAL — REV. #3 (06/18/20)
PROPOSITION 65 WARNING

MTX70HF RAMMER • OPERATION MANUAL — REV. #3 (06/18/20) — PAGE 3
NOTES

PAGE 4 — MTX70HF RAMMER • OPERATION MANUAL — REV. #3 (06/18/20)
TABLE OF CONTENTS
MTX70HF Rammer
Proposition 65 Warning ........................................... 2
Safety Information ............................................... 5–8
Specifications .......................................................... 9
General Information............................................... 10
Components .......................................................... 11
Basic Engine.......................................................... 12
Inspection .............................................................. 13
Operation......................................................... 14–15
Maintenance.......................................................... 16
Troubleshooting (Engine)................................. 17–18
Troubleshooting (Rammer) .................................... 19
NOTICE
Specifications and part numbers are subject to change
without notice.

MTX70HF RAMMER • OPERATION MANUAL — REV. #3 (06/18/20) — 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.
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.
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.

PAGE 6 — MTX70HF RAMMER • OPERATION MANUAL — REV. #3 (06/18/20)
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.

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.
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 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.

MTX70HF RAMMER • OPERATION MANUAL — REV. #3 (06/18/20) — 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.

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.
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.
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 — MTX70HF RAMMER • OPERATION MANUAL — REV. #3 (06/18/20)
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.

MTX70HF RAMMER • OPERATION MANUAL — REV. #3 (06/18/20) — PAGE 9
SPECIFICATIONS
Table 1. Rammer Specifications
Overall Height 40.04 in. (1017 mm)
Overall Width 13.78 in. (350 mm)
Over Length 28.1 in. (713 mm)
Shoe Size (W x L) 13.4 x 11.2 in. (340 x 285 mm)
Fuel Tank Capacity 2.1 qt. (2 liters)
Lubrication Oil Capacity 0.86 qt. (0.82 liter)
No. of Impacts Per Second 10.7 - 11.5
Impact Force 2,855 lbf (12.7 kN)
Impact Plate Stroke 2 - 3.2 in. (50 - 80 mm)
Operating Weight 163.13 lbs. (74 kg)
Measured Sound Power Level 104 dB
Guaranteed Sound Power Level 107 dB
Max. Sound Pressure Level 94 dB
Table 2. Engine Specifications
Model Honda GX100RTKRB5 Engine
Type Air-Cooled 4 Stroke, Overhead camshaft,
single cylinder gasoline engine
Piston Displacement 6.0 cu.in. (98 cc)
Max. Output 3.0 hp/3,600 rpm (2.2 KW)
Max. Governed Speed, No Load 3,800 - 4,100 rpm
Cooling System Air-Cooled
Engine Oil Capacity 0.3 qt. (0.28 liters)
Fuel Unleaded gasoline
Lubricant for Engine Automobile Oil; Class SE or higher
Starting System Recoil Starter
Spark Plug Type NGK CR5HSB

PAGE 10 — MTX70HF RAMMER • OPERATION MANUAL — REV. #3 (06/18/20)
GENERAL INFORMATION
DEFINITION OF TAMPING RAMMER
The Multiquip MTX70HF 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 MTX70HF levels and uniformly
compacts voids between soil particles to increase dry
density.
Circular motion is converted to create impact force.
The MTX70HF 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 MTX70HF 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.
RAMMER GEARBOX AND SPRING CYLINDER
The MTX70HF 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 MTX70HF 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).

MTX70HF RAMMER • OPERATION MANUAL — REV. #3 (06/18/20) — PAGE 11
COMPONENTS
Figure 1. MTX70HF Rammer
2
1
9
3
4
5
6
7
10
11
12
13
8
Figure 1 shows the location of the controls and components
for the MTX70HF Tamping Rammer. The functions of each
control is described below:
1. Combination (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).
2. Handle — To operate rammer, GRIP handle assembly
firmly on both sides.
3. Fuel Tank Cap — Remove this cap to add unleaded
gasoline to the fuel tank. Make sure cap is tightened
securely. DO NOT over fill.
4. Hook — Used to lift rammer for transporting.
5. Air Cleaner Cover —Protects the air cleaner which
prevents dirt and other debris from entering the engine.
6. Roller —Allows rammer to be moved around easily
by rolling the unit.
7. Bellows — Reservoir for oil bath.
8. Foot —Laminated wood with tempered steel plate for
superior shock absorption.
9. FuelTank —Holds the fuel for the unit (up to 2.1quarts).
10. Muffler —reduces the noise of the engine when
running.
11. Engine —this unit uses a Honda GX100RTKRB5
gasoline engine.
12. Oil Gauge (Sight Glass) —Indicates the level of oil in
the oil bath reservoir.
13. Drain Valve —Open this valve to remove oil from the
bellows.
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.

PAGE 12 — MTX70HF RAMMER • OPERATION MANUAL — REV. #3 (06/18/20)
BASIC ENGINE
Figure 2. Honda GX100 Engine
The engine (Figure 2) must be checked for proper lubri-
cation 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. 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.
4. Muffler — Used to reduce noise and emissions.
5. 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.
6. Oil Drain Plug — Remove this plug to remove oil from
the engine's crankcase.
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.

MTX70HF RAMMER • OPERATION MANUAL — REV. #3 (06/18/20) — PAGE 13
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.
CRANKCASE 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.
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 1.7 pints (820 cc.).
ENGINE
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 5).
Figure 4. Fuel Tank
SIGHT GLASS
OIL
DRAIN PLUG
OIL
FILL PLUG
NOTICE
The oil level should be kept at the half way point of the
sight glass.
FUEL
TANK
Figure 5. Engine Oil Dipstick
2. Low levels of oil may result in engine seizure due to
high levels of consumption during operation.
3. Check the engine oil level and if the engine oil level is
low, it should be refilled. Use the proper motor oil as
suggested in the Table 3 below.
GENERAL 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.
OIL
LEVEL
DIPSTICK
Table 3. Motor Oil Grade
Season or Temperature Grade of motor oil
(higher than MS class)
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

PAGE 14 — MTX70HF RAMMER • OPERATION MANUAL — REV. #3 (06/18/20)
OPERATION
INITIAL STARTUP
When starting the MTX70HF Tamping Rammer perform
the following:
1. Slide the throttle lever from the stop to the idle position
() (Figure 6). This opens the fuel cock and the
engine electrical circuit is turned on automatically.
Figure 6. Throttle Lever (Idle Position)
2. Place the choke lever to the closed position. When the
weather is cold, close the choke all the way. When it
is hot, or if the engine is hot, open the choke a little or
leave it fully open (Figure 7).
Figure 7. Choke Lever
CAUTION
Failure to understand the operation of the Tamping
Rammer could result in severe damage to the unit or
personal injury.
THROTTLE LEVER
(IDLE POSITION)
CHOKE LEVER
(OPENED POSITION)
3. Grip the starter rope handle (Figure 8) and pull it until
you feel a slight resistance. Then pull sharply and
quickly. Return the handle to the starter case before
releasing.
Figure 8. Recoil Starter
4. If engine fails to start, move the choke lever (Figure 7)
to the half open position to avoid flooding.
5. Repeat steps 1 thru 4.
6. If the engine does not start after repeated attempts,do
the following:
a. Check fuel delivery from fuel tank to carburetor.
b. Check for restrictions to fuel flow at in-tank filter.
c. Check for restrictions to fuel flow at in-line filter.
d. Inspect spark plug for contamination and proper
gap. Clean, adjust or replace spark plug as
required.
STARTER
ROPE

MTX70HF RAMMER • OPERATION MANUAL — REV. #3 (06/18/20) — PAGE 15
OPERATION
OPERATION
1. To start the rammer tamping action, move the throttle
lever (Figure 9) quickly from IDLE to the START ( )
position. DO NOT move the throttle lever slowly as this
may cause damage to the clutch or spring.
Figure 9. Throttle Lever (Start Position)
2. The MTX70HF tamping rammer is designed to run
at 3,800 to 4,100 rpm. At optimum rpm the foot hits
at the rate between 590 - 695 impacts per minute.
Increasing throttle speed past factory set rpm does
not increase impacts and may damage unit. The
MTX70HF is designed to advance while tamping. For
faster advance, pull back slightly on the handle so that
rear of foot contacts soil first.
3. To stop the tamping action, move throttle lever quickly
from START to IDLE position (Figure 6).
THROTTLE LEVER
(START
POSITION)
CAUTION
Make sure that the throttle lever is moved to the FULL
START position. Operating the rammer at less than full
speed can result in damage to the clutch springs or foot.
STOPPING THE ENGINE
1. Move throttle lever quickly from the START to IDLE
position (Figure 6) and run the engine for three minutes
at low speed. After the engine cools, move the throttle
lever to the STOP position (Figure 10). The engine will
stop and the fuel cock is automatically closed.
Figure 10. Throttle Lever (Stop Position)
2. If the engine does not stop due to a problem with the
switch or the like, move the machine to a safe location
and hold the throttle lever in the stop position. Let the
machine run on idle and the machine will stop after a
few minutes.
THROTTLE
LEVER
(STOP
POSITION)

PAGE 16 — MTX70HF RAMMER • OPERATION MANUAL — REV. #3 (06/18/20)
MAINTENANCE
Perform the scheduled maintenance procedures as indi-
cated:
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.
EVERY 50 HOURS
Remove the fuel filter cap and clean the inside of the
fuel tank (Figure 11).
Figure 11. Fuel Filter
Remove and clean the spark plug, then adjust the spark
gap to 0.024~0.028 inch (0.6~0.7 mm).
EVERY 80 TO 100 HOURS
Remove the air cleaner cover. Loosen and remove
the 2 screws that hold the cover to the air cleaner
assembly. If the primary element (Figure 12) is dirty,
wash it with gasoline or kerosene. Then dip it in engine
oil (SAE10W-30) and wring the element so that 25 to 30
cc of engine oil remains on the element.
FUEL FIL
TER
Figure 12. Air Cleaner Primary Element
EVERY 200 HOURS
Remove the oil drain plug on foot housing (Figure 13) and
drain the oil. Refill with approximately 1.7 pint (800 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 13. Oil Drain Plug
EVERY 2 YEARS
Replace the fuel line every 2 years even if there is no
visible damage.
LONG TERM STORAGE
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.
PRIMARY
ELEMENT
SIGHT GLASS
OIL DRAIN PLUG
OIL FILL PLUG

MTX70HF RAMMER • OPERATION MANUAL — REV. #3 (06/18/20) — PAGE 17
TROUBLESHOOTING
Troubleshooting (Engine)
Symptom Possible Problem Solution
Difficult to start, fuel is available, but no spark at
spark plug.
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.
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 if transistor ignition unit is broken, and
replace defective unit. Check if voltage cord
cracked or broken and replace. Check if spark
plug is fouled and replace.
No oil? Add oil as required.
Oil pressure alarm lamp blinks upon starting?
(if applicable)
Check automatic shutdown circuit, oil sensor.
(if applicable)
Difficult to start, fuel is available, and spark is
present at the spark plug.
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.
Difficult to start, fuel is available, spark is
present and compression is normal.
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.
Difficult to start, fuel is available, spark is
present and compression is low.
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 present at carburetor.
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.

PAGE 18 — MTX70HF RAMMER • OPERATION MANUAL — REV. #3 (06/18/20)
TROUBLESHOOTING
Troubleshooting (Engine) - continued
Symptom Possible Problem Solution
Weak in power, compression is proper and
does not misfire.
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.
Weak in power, compression is proper but
misfires.
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.
Engine overheats.
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.
Rotational speed fluctuates.
Governor adjusted incorrectly? Adjust governor.
Governor spring defective? Replace governor spring.
Fuel flow restricted? Check entire fuel system for leaks or clogs.
Recoil starter malfunctions. (if applicable)
Recoil mechanism clogged with dust and dirt? Clean recoil assembly with soap and water.
Spiral spring loose? Replace spiral spring.
Starter malfunctions.
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.
Burns too much fuel.
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.
Exhaust color is continuously white.
Lubricating oil is wrong viscosity? Replace lubricating oil with correct viscosity.
Worn rings? Replace rings.
Exhaust color is continuously black.
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.
Will not start, no power with key ON.
(if applicable)
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.

MTX70HF RAMMER • OPERATION MANUAL — REV. #3 (06/18/20) — PAGE 19
TROUBLESHOOTING
Troubleshooting (Rammer)
Symptom Possible Problem Solution
Engine runs but rammer jumps
erratically or not at all.
Operating speed of throttle lever is
incorrectly set? Set throttle lever to correct position.
Oil in excess? Drain excess oil. Bring to correct level.
Clutch slips? Replace or adjust clutch.
Spring Failure? Replace spiral spring.
Speed of engine improper? Adjust engine speed to correct
operating RPM setting.
Soil over-compacted? Shut down machine and test soil.

OPERATION MANUAL
HERE’S HOW TO GET HELP
PLEASE HAVE THE MODEL AND SERIAL
NUMBER ON-HAND WHEN CALLING
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Multiquip Inc
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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
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