Page 1
OPERATION AND PARTS MANUAL
SERIES
MODEL MTX70HD
TAMPING RAMMER
(HONDA GX100UKRBF GASOLINE ENGINE)
Revision #2 (10/26/18)
To find the latest revision of this
publication, visit our website at:
www.multiquip.com
THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
Page 2
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 specifi cally address the level of exposure
to the operator and are preceded by one of four words:
DANGER, WARNING, CAUTION
SAFETY SYMBOLS
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.
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.
or NOTICE.
NOTICE
Addresses practices not related to personal injury.
PAGE 6 — MTX70HD RAMMER • OPERATION AND PARTS MANUAL — REV. #2 (10/26/18)
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GENERAL SAFETY
CAUTION
ALWAYS know the location of the nearest phone or keep a
Also, know the phone numbers of
This
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
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
use the machine
lubricate components or attempt service on a
Fix damage to machine and replace any broken parts
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.
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.
SAFETY INFORMATION
phone on the job site.
the nearest ambulance, doctor and fi re department.
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 infl uence 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
qualifi ed personnel 18 years of age and older.
Whenever necessary, replace nameplate, operation and
safety decals when they become diffi cult read.
Manufacturer does not assume responsibility for any
accident due to equipment modifi cations. Unauthorized
equipment modifi cation 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.
NEVER operate the equipment in an explosive
atmosphere or near combustible materials. An
explosion or fi re could result causing severe
bodily harm or even death.
WARNING
NEVER disconnect any
devices will void all warranties.
DO NOT
loads on the machine.
Use the machine with confi dence for tamping earth and
sand, soil, gravel, and asphalt. DO NOT
for other types of jobs.
CAUTION
NEVER
running machine.
NOTICE
ALWAYS know the location of the nearest
fi re extinguisher.
ALWAYS know the location of the nearest
fi rst aid kit.
MTX70HD RAMMER • OPERATION AND PARTS MANUAL — REV. #2 (10/26/18) — PAGE 7
ALWAYS keep the machine in proper running condition.
immediately.
ALWAYS
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SAFETY INFORMATION
ENGINE SAFETY
FUEL SAFETY
DO NOT add fuel to equipment if it is placed inside truck
bed with plastic liner. Possibility exists of explosion or
start the engine near spilled fuel or combustible
fl uids. Fuel is extremely fl ammable and its vapors can
refuel in a well-ventilated area, away from
use extreme caution when working with
fi ll the fuel tank while the engine is running
overfi ll tank, since spilled fuel could ignite if it
comes into contact with hot engine parts or sparks from
Store fuel in appropriate containers, in well-ventilated
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 fl ow
of cooling air. NEVER operate
this equipment in any enclosed
or narrow area where free fl ow
of the air is restricted. If the air
fl ow 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.
DANGER
fi re due to static electricity.
DO NOT
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,
muffl er or cylinder. Allow these parts to cool
before servicing equipment.
NOTICE
NEVER run engine without an air fi lter or with a dirty air
fi lter. Severe engine damage may occur. Service air fi lter
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.
cause an explosion if ignited.
ALWAYS
sparks and open fl ames.
ALWAYS
fl ammable liquids.
DO NOT
or hot.
DO NOT
the ignition system.
areas and away from sparks and fl ames.
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 — MTX70HD RAMMER • OPERATION AND PARTS MANUAL — REV. #2 (10/26/18)
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TRANSPORTING SAFETY
CAUTION
ENVIRONMENTAL SAFETY
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.
SAFETY INFORMATION
Use adequate lifting cable (wire or rope) of suffi cient
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.
NOTICE
Dispose of hazardous waste properly.
Examples of potentially hazardous waste
are used motor oil, fuel and fuel fi lters.
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.
MTX70HD RAMMER • OPERATION AND PARTS MANUAL — REV. #2 (10/26/18) — PAGE 9
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SPECIFICATIONS
Table 1. Rammer Specifications
Overall Height 39.37 in. (1000 mm)
Overall Width 13.78 in. (350 mm)
Over Length 31.02 in. (788 mm)
Shoe Size (W x L) 13.4 x 11.2 in. (340 x 285 mm)
Fuel Tank Capacity 2.7 qt. (2.5 liters)
Lubrication Oil Capacity 0.8 qt. (0.75 liter)
No. of Impacts Per Second 10.7 - 11.5
Impact Force 2,855 lbf (12.7 kN)
Impact Plate Stroke 2 - 3.15 in. (50 - 80 mm)
Operating Weight 165.34 lbs. (74 kg)
Table 2. Engine Specifications
Model Honda GX100UKRBF Engine
Type
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
Air-Cooled 4 Stroke, Overhead camshaft,
single cylinder gasoline engine
PAGE 10 — MTX70HD RAMMER • OPERATION AND PARTS MANUAL — REV. #2 (10/26/18)
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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/s
2
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.
5.6
MTX70HD RAMMER • OPERATION AND PARTS MANUAL — REV. #2 (10/26/18) — PAGE 11
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GENERAL INFORMATION
The Multiquip MTX70HD 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 MTX70HD levels and uniformly
compacts voids between soil particles to increase dry
density.
Circular motion is converted to create impact force.
The MTX70HD tamping rammer develops a powerful
compacting force at the foot of the rammer. To maintain
optimum performance, proper operation and service are
essential.
The MTX70HD 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 MTX70HD uses an oil bath lubrication system. Always
check the oil level through the oil level sight glass at the
rear of the tamper foot.
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.
Before starting the MTX70HD Tamping Rammer identify
and understand the function of the controls.
3. Do not move the rammer with the lifting handle
and the front rollers more than 16 feet (5 meters).
PAGE 12 — MTX70HD RAMMER • OPERATION AND PARTS MANUAL — REV. #2 (10/26/18)
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COMPONENTS
3
2
10
5
6
4
1
9
11
7
8
Figure 1. MTX70HD Rammer
Figure 1 shows the location of the controls and components
for the MTX70HD 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.
12
13
8.
Foot — Laminated wood with tempered steel plate for
superior shock absorption.
9.
Fuel Tank — Holds the fuel for the unit (up to 3.2
quarts).
10. Muffler — Reduces the noise of the engine when
running.
11. Engine — This unit uses a Honda GX100UKRBF
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.
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.
MTX70HD RAMMER • OPERATION AND PARTS MANUAL — REV. #2 (10/26/18) — PAGE 13
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 10
Figure 2. Honda GX100 Engine
BASIC 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. 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.
PAGE 14 — MTX70HD RAMMER • OPERATION AND PARTS MANUAL — REV. #2 (10/26/18)
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INSPECTION
OIL
OIL
OIL
DIPSTICK
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.
FILL PLUG
SIGHT GLASS
DRAIN PLUG
Figure 3. Foot Housing Sight Glass
LEVEL
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 4 below.
Table 4. Motor Oil Grade
Season or Temperature
Grade of motor oil
(higher than MS class)
NOTICE
The oil level should be kept at the half way point of the
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 (800 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).
FUEL
TANK
Spring, Summer or Autumn
+120° F to +15° F
Winter
+40° F to +15° F
SAE 30
SAE 30
Below +15° F SAE 10W-30
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.
Figure 4. Fuel Tank
MTX70HD RAMMER • OPERATION AND PARTS MANUAL — REV. #2 (10/26/18) — PAGE 15
Page 12
OPERATION
CAUTION
Failure to understand the operation of the Tamping
Rammer could result in severe damage to the unit or
personal injury.
INITIAL STARTUP
When starting the MTX70HD 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.
THROTTLE LEVER
(IDLE POSITION)
3. 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 8. Choke Lever
4. Grip the starter rope handle (Figure 9) and pull it until
you feel a slight resistance. Then pull sharply and
quickly. Return the handle to the starter case before
releasing.
Figure 6. Throttle Lever (Idle Position)
2. Carburetor Purge System: Push the purge bulb four
times or until you see fuel in the bulb (Figure 7).
Figure 7. Purge Bulb
NOTICE
Pumping the purge bulb removes air from the fuel
system. It does not pump fuel into the carburetor.
STARTER
ROPE
Figure 9. Recoil Starter
5. If engine fails to start, move the choke lever (Figure 8)
to the half open position to avoid flooding.
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.
PAGE 16 — MTX70HD RAMMER • OPERATION AND PARTS MANUAL — REV. #2 (10/26/18)
Page 13
OPERATION
POSITION)
LEVER
POSITION)
OPERATION
1. To start the rammer tamping action, move the throttle
lever (Figure 10) quickly from IDLE to the START ( )
position. DO NOT move the throttle lever slowly as this
may cause damage to the clutch or spring.
THROTTLE LEVER
(START
Figure 10. Throttle Lever (Start Position)
CAUTION
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 11). The engine will
stop and the fuel cock is automatically closed.
THROTTLE
(STOP
Figure 11. Throttle Lever (Stop Position)
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.
2. The MTX70HD 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
MTX70HD 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).
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.
MTX70HD RAMMER • OPERATION AND PARTS MANUAL — REV. #2 (10/26/18) — PAGE 17
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