MHP3
TracHorse
Safety, OperatiOn and Maintenance
USer ManUaL
© 2012 Stanley Black & Decker, Inc.
New Britain, CT 06053
U.S.A.
68589 12/2013 Ver. 7
TABLE OF CONTENTS
WARNING
IMPORTANT
SAFETY SYMBOLS ..................................................................................................................................................4
SAFETY PRECAUTIONS .......................................................................................................................................... 5
TOOL STICKERS & TAGS ........................................................................................................................................7
HOSE TYPES ............................................................................................................................................................ 8
HOSE RECOMMENDATIONS ..................................................................................................................................9
HTMA REQUIREMENTS .........................................................................................................................................10
HOSE & FITTING CONNECTIONS ........................................................................................................................ 11
OPERATION ............................................................................................................................................................12
TRACK TENSION ADJUSTMENT ..........................................................................................................................19
TROUBLESHOOTING ............................................................................................................................................20
FUEL TANK .............................................................................................................................................................21
SPECIFICATIONS ................................................................................................................................................... 22
FILTERS .................................................................................................................................................................. 22
ACCESSORIES.......................................................................................................................................................22
MHP3 MAJOR PARTS ASSEMBLY ILLUSTRATION ..............................................................................................23
MHP3 PARTS LIST—MAJOR ASSEMBLY .............................................................................................................24
HOSE & FITTING ILLUSTRATION .........................................................................................................................25
MHP3 PARTS LIST—HOSE & FITTING ................................................................................................................. 26
MHP3 ELECTRIC WIRING SCHEMATIC ...............................................................................................................27
MHP3 POWER UNIT FRAME ILLUSTRATION & PARTS LIST .............................................................................. 28
MHP3 HONDA ENGINE ILLUSTRATION ...............................................................................................................29
MHP3 HONDA ENGINE PARTS LIST ..................................................................................................................... 30
To ll out a Product Warranty Recording form, and for information on your warranty,
visit Stanleyhydraulic.com and select the Warranty tab.
(NOTE: The warranty recording form must be submitted to validate the warranty).
SERVICING: This manual contains safety, operation, and routine maintenance instructions. Stanley Hydraulic Tools
recommends that servicing of hydraulic tools, other than routine maintenance, must be performed by an authorized
and certied dealer. Please read the following warning.
SERIOUS INJURY OR DEATH COULD RESULT FROM THE IMPROPER REPAIR OR
SERVICE OF THIS TOOL.
REPAIRS AND / OR SERVICE TO THIS TOOL MUST ONLY BE DONE BY AN
AUTHORIZED AND CERTIFIED DEALER.
For the nearest authorized and certied dealer, call Stanley Hydraulic Tools at the number listed on the back of this
manual and ask for a Customer Service Representative.
MHP3 User Manual ◄ 3
SAFETY SYMBOLS
DANGER
WARNING
CAUTION
CAUTION
NOTICE
IMPORTANT
Safety symbols and signal words, as shown below, are used to emphasize all operator, maintenance and repair actions which, if not strictly followed, could result in a life-threatening situation, bodily injury or damage to equipment.
This is the safety alert symbol. It is used to alert you to potential personal injury
hazards. Obey all safety messages that follow this symbol to avoid possible
injury or death.
This safety alert and signal word indicate an imminently hazardous situation
which, if not avoided, will result in death or serious injury.
This safety alert and signal word indicate a potentially hazardous situation
which, if not avoided, could result in death or serious injury.
This safety alert and signal word indicate a potentially hazardous situation
which, if not avoided, could result in death or serious injury.
This signal word indicates a potentially hazardous situation which, if not avoided, may result in property damage.
This signal word indicates a situation which, if not avoided, will result in damage
to the equipment.
This signal word indicates a situation which, if not avoided, may result in damage to the equipment.
Always observe safety symbols. They are included for your safety and for the protection of the tool.
LOCAL SAFETY REGULATIONS
Enter any local safety regulations here. Keep these instructions in an area accessible to the operator and maintenance personnel.
4 ► MHP3 User Manual
SAFETY PRECAUTIONS
Tool operators and maintenance personnel must always
comply with the safety precautions given in this manual
and on the stickers and tags attached to the machine.
These safety precautions are given for your safety. Review them carefully before operating the machine and
before performing general maintenance or routine service.
Supervising personnel should develop additional pre-
cautions relating to the specic work area and local
safety regulations. If so, place the added precautions in
the space provided in this manual.
If you have not read this manual or the engine manual, you are not ready to operate the MHP3. Read and
understand this manual and any stickers and tags
attached to the machine before operation. Failure to
do so can result in equipment damage, personal injury, or death.
• Operate the machine in a work area WITHOUT BYSTANDERS. The operator must be familiar with all
prohibited work areas such as excessive slopes and
dangerous terrain conditions.
• DO NOT operate the machine ACROSS excessive
slopes or unstable terrain where “tip over” is a hazard.
• DO NOT operate the machine in conned areas
where there may be a risk of crushing the operator
between the machine and another object.
• DO NOT OPERATE THE TRACHORSE IN ENCLOSED SPACES. Inhalation of engine exhaust
can be fatal.
• DO NOT WEAR LOOSE CLOTHING that can get
entangled in the working parts of the machine or hydraulic tools.
• DO NOT add fuel to the machine while it is running
or still hot.
• DO NOT operate the machine if a fuel odor is present.
• DO NOT operate the machine within 3.3 ft./1 m of
buildings, obstructions, or ammable objects.
• Allow the engine to cool before storing the machine
in an enclosure.
• DO NOT RIDE ON, OR ALLOW ANYONE ELSE TO
RIDE ON, THE MACHINE AT ANY TIME.
• Establish a training program for all operators to ensure safe operation.
• DO NOT operate the machine unless thoroughly
trained or under the supervision of an instructor.
• Always wear safety equipment such as goggles,
ear, head protection, respiratory and safety shoes
at all times when operating the TracHorse and hydraulic tools.
• DO NOT inspect or clean the machine while the engine is running. Accidental engagement of the machine can cause serious injury or death.
• Wear a homologated respirator when cutting or
breaking masonry, concrete, asbestos and other
materials that produce dust.
• The hydraulic circuit control switch must be in the
“OFF”position when coupling or uncoupling hydrau-
lic tools. Wipe all couplers clean before connecting.
Use only lint-free cloths. Failure to do so may result
in damage to the quick couplers and cause overheating of the hydraulic system.
• Before operating hydraulic tools, read and understand the operation manual furnished with the tool.
• DO NOT operate a damaged, or improperly adjusted, machine. DO NOT operate with guards removed.
• DO NOT weld or cut with an acetylene torch any
surface or component of the equipment. Consult
with the Stanley factory before performing any welding or acetylene cutting of the equipment.
• Prevent possible personal injury or equipment damage by having all repair, maintenance and service
performed only by authorized and properly trained
personnel.
• DO NOT exceed the rated limits of the equipment
or use the equipment for applications beyond its design capacity.
• Always keep critical markings, such as labels and
warning stickers legible.
• Always replace parts with replacement parts recommended by Stanley Hydraulic Tools.
• Keep all body parts away from working parts of the
TracHorse.
• Be aware of surrounding hazards. Noise created by
the TracHorse and the tools it operates may mask
early indications of approaching hazards.
• Only use the TracHorse in well-ventilated areas. DO
NOT operate in explosive atmospheres, in closed
environments or near ammable substances.
MHP3 User Manual ◄ 5
SAFETY PRECAUTIONS
• Always be well-rested and mentally alert when operating the TracHorse and tools. DO NOT operate if
affected by medications, drugs or alcohol.
• Keep clear of hot (engine) parts and exhaust.
• DO NOT use ammable solvents around the engine.
• DO NOT reverse tool rotation by changing uid ow
direction.
• Always use hose and ttings rated for 2500 psi/172
bar with a 4 to 1 safety factor. Be sure all hose connections are tight.
• Be sure all hoses are correct for current ow direction to and from the tool being used.
• DO NOT inspect hoses and ttings for leaks by using bare hands. “Pin-hole” leaks can penetrate the
skin.
• DO NOT operate tools if oil temperature exceeds
140 °F/60 °C. Operation at high temperatures can
cause higher than normal temperatures at the tools
which can result in operator discomfort.
• Disconnect battery before servicing electrical components. Electrocution or burns could result from
improper contact.
6 ► MHP3 User Manual
59126
Dash Sticker
68336
Dual Tool Circuit Sticker
TOOL STICKERS & TAGS
Usein well ventilatedareas only. Exhaust contains chemicals known to the
state of California to cause cancer,birth defects, and other reproductive
harm.
Contact with high pressure fluid at leak or burst resulting from
improper handling, operation, or maintenance will causeoil injection
to body.
Engine,exhaust, and other surfaces of tool may be hot.Avoid accidental
contact with hot surfaces.Allowtool to cool before maintenance or
storage.
All operators mustread, understand, and followALL safteyprecautions
and operatinginstructions found in owners manual before operatingtool.
59126
Dash Sticker (Closer View)
68335
Throttle
Sticker
68334
Limit Engine Speed Sticker
47352
Lift Point
Sticker
MHP3 User Manual ◄ 7
HOSE TYPES
The rated working pressure of the hydraulic hose must be equal to or higher than the relief valve setting on the hydraulic system. There are three types of hydraulic hose that meet this requirement and are authorized for use with
Stanley Hydraulic Tools. They are:
Certied non-conductive — constructed of thermoplastic or synthetic rubber inner tube, synthetic ber braid
reinforcement, and weather resistant thermoplastic or synthetic rubber cover. Hose labeled certied non-
conductive is the only hose authorized for use near electrical conductors.
Wire-braided (conductive) — constructed of synthetic rubber inner tube, single or double wire braid reinforce-
ment, and weather resistant synthetic rubber cover. This hose is conductive and must never be used near
electrical conductors.
Fabric-braided (not certied or labeled non-conductive) — constructed of thermoplastic or synthetic rubber inner tube, synthetic ber braid reinforcement, and weather resistant thermoplastic or synthetic rubber cover. This
hose is not certied non-conductive and must never be used near electrical conductors.
HOSE SAFETY TAGS
To help ensure your safety, the following DANGER tags are attached to all hose purchased from Stanley Hydraulic
Tools. DO NOT REMOVE THESE TAGS.
If the information on a tag is illegible because of wear or damage, replace the tag immediately. A new tag may be
obtained from your Stanley Distributor.
THE TAG SHOWN BELOW IS ATTACHED TO “CERTIFIED NON-CONDUCTIVE” HOSE
DANGER
1. FAILURE TO USE HYDRAULIC HOSE LABELED AND CERTIFIED AS NON-CONDUCTIVE
WHEN USING HYDRAULIC TOOLS ON OR NEAR ELECTRIC LINES MAY RESULT IN
DEATH OR SERIOUS INJURY.
FOR PROPER AND SAFE OPERATION MAKE SURE THAT YOU HAVE BEEN PROPERLY TRAINED IN CORRECT PROCEDURES REQUIRED FOR WORK ON OR AROUND
ELECTRIC LINES.
2. BEFORE USING HYDRAULIC HOSE LABELED AND CERTIFIED AS NON-CONDUCTIVE
ON OR NEAR ELECTRIC LINES. WIPE THE ENTIRE LENGTH OF THE HOSE AND FITTING WITH A CLEAN DRY ABSORBENT CLOTH TO REMOVE DIRT AND MOISTURE AND
TEST HOSE FOR MAXIMUM ALLOWABLE CURRENT LEAKAGE IN ACCORDANCE WITH
SAFETY DEPARTMENT INSTRUCTIONS.
DO NOT REMOVE THIS TAG
SEE OTHER SIDE
SIDE 1
3. DO NOT EXCEED HOSE WORKING PRESSURE OR ABUSE HOSE. IMPROPER USE
OR HANDLING OF HOSE COULD RESULT IN BURST OR OTHER HOSE FAILURE.
KEEP HOSE AS FAR AWAY AS POSSIBLE FROM BODY AND DO NOT PERMIT DIRECT
CONTACT DURING USE. CONTACT AT THE BURST CAN CAUSE BODILY INJECTION
AND SEVERE PERSONAL INJURY.
4. HANDLE AND ROUTE HOSE CAREFULLY TO AVOID KINKING, ABRASION, CUTTING, OR
CONTACT WITH HIGH TEMPERATURE SURFACES. DO NOT USE IF KINKED. DO NOT
USE HOSE TO PULL OR LIFT TOOLS, POWER UNITS, ETC.
5. CHECK ENTIRE HOSE FOR CUTS CRACKS LEAKS ABRASIONS, BULGES, OR DAM-
AGE TO COUPLINGS IF ANY OF THESE CONDITIONS EXIST, REPLACE THE HOSE
IMMEDIATELY. NEVER USE TAPE OR ANY DEVICE TO ATTEMPT TO MEND THE HOSE.
6. AFTER EACH USE STORE IN A CLEAN DRY AREA.
(Shown smaller than actual size)
DANGER
DANGER
SEE OTHER SIDE
SIDE 2
THE TAG SHOWN BELOW IS ATTACHED TO “CONDUCTIVE” HOSE.
DANGER
DANGER
1. DO NOT USE THIS HYDRAULIC HOSE ON OR NEAR ELECTRIC LINES. THIS HOSE IS
NOT LABELED OR CERTIFIED AS NON-CONDUCTIVE. USING THIS HOSE ON OR NEAR
ELECTRICAL LINES MAY RESULT IN DEATH OR SERIOUS INJURY.
2. FOR PROPER AND SAFE OPERATION MAKE SURE THAT YOU HAVE BEEN PROPERLY
TRAINED IN CORRECT PROCEDURES REQUIRED FOR WORK ON OR AROUND ELECTRIC LINES.
3. DO NOT EXCEED HOSE WORKING PRESSURE OR ABUSE HOSE. IMPROPER USE OR
HANDLING OF HOSE COULD RESULT IN BURST OR OTHER HOSE FAILURE. KEEP HOSE
AS FAR AWAY AS POSSIBLE FROM BODY AND DO NOT PERMIT DIRECT CONTACT
DURING USE. CONTACT AT THE BURST CAN CAUSE BODILY INJECTION AND SEVERE
PERSONAL INJURY.
4. HANDLE AND ROUTE HOSE CAREFULLY TO AVOID KINKING, CUTTING, OR CONTACT
WITH HIGH TEMPERATURE SURFACES. DO NOT USE IF KINKED. DO NOT USE HOSE TO
PULL OR LIFT TOOLS, POWER UNITS, ETC.
DO NOT REMOVE THIS TAG
SEE OTHER SIDE
SIDE 1
5. CHECK ENTIRE HOSE FOR CUTS CRACKS LEAKS ABRASIONS, BULGES, OR DAMAGE TO
COUPLINGS IF ANY OF THESE CONDITIONS EXIST, REPLACE THE HOSE IMMEDIATELY.
NEVER USE TAPE OR ANY DEVICE TO ATTEMPT TO MEND THE HOSE.
6. AFTER EACH USE STORE IN A CLEAN DRY AREA.
(Shown smaller than actual size)
DANGER
SEE OTHER SIDE
SIDE 2
DO NOT REMOVE THIS TAG
DO NOT REMOVE THIS TAG
8 ► MHP3 User Manual
Min. Working Pressure
USE
(Press/Return)
HOSE RECOMMENDATIONS
Certied Non-Conductive Hose - Fiber Braid - for Utility Bucket Trucks
Oil Flow Hose Lengths Inside Diameter
GPM LPM FEET METERS INCH MM PSI BAR
4-9 15-34 up to 10 up to 3 3/8 10 Both 2250 155
Conductive Hose - Wire Braid or Fiber Braid -DO NOT USE NEAR ELECTRICAL CONDUCTORS
4-6 15-23 up to 25 up to 7.5 3/8 10 Both 2500 175
4-6 15-23 26-100 7.5-30 1/2 13 Both 2500 175
5-10.5 19-40 up to 50 up to 15 1/2 13 Both 2500 175
5-10.5 19-40 51-100 15-30 5/8 16 Both 2500 175
5/8 16 Pressure 2500 175
3/4 19 Return 2500 175
5-10.5 19-40 100-300 30-90
10-13 38-49 up to 50 up to 15 5/8 16 Both 2500 175
5/8 16 Pressure 2500 175
3/4 19 Return 2500 175
10-13 38-49 51-100 15-30
3/4 19 Pressure 2500 175
1 25.4 Return 2500 175
10-13 38-49 100-200 30-60
5/8 16 Pressure 2500 175
3/4 19 Return 2500 175
13-16 49-60 up to 25 up to 8
3/4 19 Pressure 2500 175
1 25.4 Return 2500 175
13-16 49-60 26-100 8-30
PRESSURE
<<< FLOW
RETURN
FLOW >>>
Figure 1. Typical Hose Connections
Tool to Hydraulic Circuit Hose
Recommendations
The chart to the right shows recommended
minimum hose diameters for various hose
lengths based on gallons per minute (gpm)/
liters per minute (lpm). These recommenda-
tions are intended to keep return line pressure
(back pressure) to a minimum acceptable lev-
el to ensure maximum tool performance.
This chart is intended to be used for hydraulic
tool applications only based on Stanley Hy-
draulic Tools tool operating requirements and
should not be used for any other applications.
All hydraulic hose must have at least a rated
minimum working pressure equal to the maxi-
mum hydraulic system relief valve setting.
All hydraulic hose must meet or exceed
specications as set forth by SAE J517.
MHP3 User Manual ◄ 9
HTMA / EHTMA REQUIREMENTS
HTMA / EHTMA REQUIREMENTS
HTMA
HYDRAULIC SYSTEM REQUIREMENTS
Flow Range
Nominal Operating Pressure
(at the power supply outlet)
System relief valve setting
(at the power supply outlet)
Maximum back pressure
(at tool end of the return hose)
Measured at a max. uid viscosity of:
(at min. operating temperature)
Temperature: Sufcient heat rejection
capacity to limit max. uid temperature to:
(at max. expected ambient temperature)
Min. cooling capacity at a temperature
difference of between ambient and uid
temps
NOTE:
Do not operate the tool at oil temperatures above 140° F (60° C). Operation at higher temperatures can cause operator
discomfort at the tool.
Filter
Min. full-ow ltration
Sized for ow of at least:
(For cold temp. startup and max.
dirt-holding capacity)
4-6 gpm 7-9 gpm 9-10.5 gpm 11-13 gpm
(15-23 lpm) (26-34 lpm) (34-40 lpm) (42-49 lpm)
1500 psi 1500 psi 1500 psi 1500 psi
(103 bar) (103 bar) (103 bar) (103 bar)
2100-2250 psi 2100-2250 psi 2200-2300 psi 2100-2250 psi
(145-155 bar) (145-155 bar) (152-159 bar) (145-155 bar)
250 psi 250 psi 250 psi 250 psi
(17 bar) (17 bar) (17 bar) (17 bar)
400 ssu* 400 ssu* 400 ssu* 400 ssu*
(82 centistokes) (82 centistokes) (82 centistokes) (82 centistokes)
140° F 140° F 140° F 140° F
(60° C) (60° C) (60° C) (60° C)
3 hp 5 hp 6 hp 7 hp
(2.24 kW) (3.73 kW) (5.22 kW) (4.47 kW)
40° F 40° F 40° F 40° F
(22° C) (22° C) (22° C) (22° C)
25 microns 25 microns 25 microns 25 microns
30 gpm 30 gpm 30 gpm 30 gpm
(114 lpm) (114 lpm) (114 lpm) (114 lpm)
TYPE I TYPE II
TOOL TYPE
TYPE RR
TYPE III
Hydraulic uid Petroleum based
(premium grade, anti-wear, non-conductive)
Viscosity (at min. and max. operating temps)
NOTE:
When choosing hydraulic uid, the expected oil temperature extremes that will be experienced in service determine the
most suitable temperature viscosity characteristics. Hydraulic uids with a viscosity index over 140 will meet the requirements
over a wide range of operating temperatures.
*SSU = Saybolt Seconds Universal
EHTMA
100-400 ssu* 100-400 ssu* 100-400 ssu* 100-400 ssu*
(20-82 centistokes)
CLASSIFICATION
HYDRAULIC SYSTEM
REQUIREMENTS
Flow Range
Nominal Operating Pressure
(at the power supply outlet)
System relief valve setting
(at the power supply outlet)
NOTE: These are general hydraulic system requirements. See tool specication page for tool specic requirements
B
3.5-4.3 gpm 4.7-5.8 gpm 7.1-8.7 gpm 9.5-11.6 gpm 11.8-14.5 gpm
(13.5-16.5 lpm) (18-22 lpm) (27-33 lpm) (36-44 lpm) (45-55 lpm)
1870 psi 1500 psi 1500 psi 1500 psi 1500 psi
(129 bar) (103 bar) (103 bar) (103 bar) (103 bar)
2495 psi 2000 psi 2000 psi 2000 psi 2000 psi
(172 bar) (138 bar) (138 bar) (138 bar) (138 bar)
C
D
10 ► MHP3 User Manual
POWER UNIT PANEL
HOSE & FITTING CONNECTIONS
HTMA 1/2 INCH MALE QUICK DISCONNECT
COUPLER
(STANLEY P/N 58857 COUPLER NOSE OR STANLEY
P/N 58718 COUPLER SET – NOSE & BODY)
HTMA 1/2 INCH FEMALE QUICK DISCONNECT
COUPLER
(STANLEY P/N 58856 COUPLER BODY or STANLEY
P/N 58718 COUPLER SET – NOSE & BODY)
1/2 INCH ID HOSE, 25 FT TO 50 FT LONG.
(FOR 25 FEET, STANLEY P/N 31972 HYDRAULIC
HOSE OR STANLEY P/N 58633 TWINNED HYDRAULIC
HOSES OR 58451 2-WIRE BRAID HYDRAULIC HOSE)
(FOR 50 FEET, STANLEY P/N 31848 HYDRAULIC
HOSE OR STANLEY P/N 58634 TWINNED HYDRAULIC
HOSES OR 58448 2-WIRE BRAID HYDRAULIC HOSE)
1/2 INCH MALE PIPE HOSE END
HTMA 1/2 INCH MALE QUICK DISCONNECT
COUPLER
(STANLEY P/N 03975 COUPLER NOSE OR STANLEY
P/N 03974 COUPLER SET – NOSE & BODY)
HTMA 1/2 INCH FEMALE QUICK DISCONNECT
COUPLER
(STANLEY P/N 03976 COUPLER BODY OR STANLEY
P/N 03974 COUPLER SET – NOSE & BODY)
MHP3 User Manual ◄ 11
OPERATION
NOTICE
NOTICE
NOTICE
PRE OPERATION PROCEDURES
PREPARATION FOR INITIAL USE
Connect the battery cables to the battery. Other than
connecting the battery, no special unpacking or assembly requirements prior to usage. Inspection to assure
the equipment was not damaged in shipping, does not
contain packing debris, and checking uid levels as described below, is all that is required.
Check the TracHorse to ensure all guards are in place
and make sure all controls are functioning properly and
make sure the unit is completely assembled with no
missing, damaged or loose parts or ttings.
ENGINE OIL LEVEL
Before each use, check the engine oil level. Make sure
the engine oil level is at the FULL MARK on the dipstick.
Do not overll. Use detergent oil classied “For Service
SE, SF, SG” as specied in the engine operating and
maintenance manual.
The engine oil dipstick is located on the right side of the
Honda engine.
ENGINE FUEL LEVEL
Check the fuel level. If low, ll with unleaded gasoline
with a minimum of 85 octane rating.
BATTERY
The supplied 12 Volt DC battery is a non-spillable, maintenance-free battery and is fully charged.
Make sure the battery cables are tight and charging circuit functions are operating properly.
Do not charge the battery with a standard
automotive battery charger. This type of charger
produces a charging amperage higher than 2
amps. Charging the battery at higher than 2 amps
will damage the battery.
Engine Oil
Filler Cap
Engine Oil
Dipstick
Figure 2. Honda Engine
SPARK PLUG
The power units are equipped with Honda engines,
ONLY Denso J16CR-U or equivalent can be used.
Incorrect types of spark plugs can produce radio frequency interference.
If the engine runs out of gas or dies during
operation and the ignition switch is left in the ON
or RUN position, this could drain the battery. Make
sure the ignition switch is returned to the OFF
position.
HYDRAULIC FLUID
Check the sight gauge in the hydraulic uid reservoir for
the proper uid level. Use uids meeting the following
specications.
Low hydraulic uid indicates a leak in the hydraulic
system. Inspect all hydraulic connections and
hydraulic components for leaks. DO NOT use the
equipment until leaks are repaired.
12 ► MHP3 User Manual
OPERATION
VISCOSITY (FLUID THICKNESS)
U.S. METRIC
50 °F 450 SSU Max. 10 °C 95 C.S.
100 °F 130-200 SSU 38 °C 27–42 C.S.
140 °F 85 SSU Min. 60 °C 16.5 C.S. Min.
Pour Point: –10 °F/–23 °C Minimum (for cold startup)
Viscosity Index: (ASTM D-2220) 140 Minimum
Demulsibility: (ASTM D-1401) 30 Minutes Maximum
Flash Point: (ASTM D-92) 340 °F/171 °C Minimum
Rust Inhibition: (ASTM D-665 A & B) Pass
Oxidation: (ASTM D-943) 1000 Hours Minimum
Pump Wear Test: (ASTM D-2882) 60 mg Maximum
The following uids work well over a wide temperature
range, allow moisture to settle out and resist biological
growth that may occur in cool operating hydraulic cir-
cuits. These uids are recommended by Stanley. Other
uids that meet or exceed the specications of these u-
ids may also be used.
• Chevron AW-MV-32
• Exxon “Univis” J-26
• Mobil D.T.E. 13
• Gulf “Harmony” AW-HVI-150-32
• Shell “Tellus” T-32
• Texaco “Rando” HD-AZ
• Union “Unax” AW-WR-32
• Terresolve EnviroLogic 132
QUICK DISCONNECT COUPLERS
HTMA-approved quick-disconnect couplings are in-
stalled to hydraulic hoses so that the direction of oil ow
is always from the male to the female quick disconnect
as shown on page 10. Quick disconnect couplings and
hose ttings are selected so that additional ttings such
as reducer or adapter ttings are not required.
If adapter ttings are used, they must be approved steel
hydraulic ttings meeting a minimum operating pressure
rating of 2500 psi/172 bar. Do not use galvanized pipe
ttings or black pipe ttings.
Use thread tape or pipe joint compound when installing
quick disconnect couplings to hose or tool ttings. Follow the instructions furnished with the selected thread
sealant. DO NOT OVERTIGHTEN THE FITTINGS.
OPERATING THE TOOL CIRCUIT
Facing the panel, the male quick disconnect ttings are
the PRESSURE FLUID OUT tting. The female quick
disconnect ttings are the RETURN FLUID IN (RETURN) tting.
PRESSURE (OUT)
The “Dual Circuit” control panel contains connections for
two 5 GPM tool circuits. In addition, the two circuits may
be combined into one 10 GPM tool circuit.
1. If using one 5 GPM tool circuit, select either the upper or lower circuit and connect the PRESSURE
FLUID OUT hose to the male coupler and connect
the RETURN FLUID IN (RETURN) to the female
coupler next to it. Connect the other ends of the
hoses to the tool.
If using both 5 GPM tool circuits, connect PRESSURE FLUID OUT hoses to the male couplers and
connect the RETURN FLUID IN (RETURN) hoses
to the female couplers. Connect the other ends of
the hoses to the tools.
NOTE:
Before starting the engine make sure the tool circuit
switches are in the OFF position.
The power unit will not start if the tool selector
switches are not in the OFF position.
2. Ensure the throttle control is pulled fully back to the
idle position.
RETURN (IN)
MHP3 User Manual ◄ 13
OPERATION
NOTICE
3. Ensure the tool circuit switches are in the OFF position.
4. Pull the choke out until it stops.
5. Turn the ignition switch clockwise to begin cranking
the engine. Use short starting cycles (15 seconds
per minute) to prolong starter life. Extended cranking can damage the starter motor.
6. After the engine starts, allow it to warm-up for a few
seconds before moving the choke. Move the choke
inward in small steps to allow the engine to accept
small changes in speed and load. Continue moving
the choke in until it is fully off and the engine is running smoothly.
7. Place the throttle at the maximum setting.
8. Position each tool circuit switch to 5 GPM. The tools
can now be used.
9. Reverse the above procedure to stop using the
tools.
DUAL CIRCUIT COMBINED FOR 10 GPM
1. To combine the two 5 GPM tool circuits into one 10
GPM tool circuit, connect the PRESSURE FLUID
OUT hose to either one of the two male couplers.
Connect the RETURN FLUID IN (RETURN) hose
to either one of the two male couplers. Connect the
other ends of the hoses to the tool.
2. Ensure the throttle control is pulled fully back to the
idle position.
3. Ensure the tool circuit switches are in the OFF position.
4. Pull the choke out until it stops.
5. Turn the ignition switch clockwise to begin cranking
the engine. Use short starting cycles (15 seconds
per minute) to prolong starter life. Extended cranking can damage the starter motor.
6. After the engine starts, allow it to warm-up for a few
seconds before moving the choke. Move the choke
inward in small steps to allow the engine to accept
small changes in speed and load. Continue moving
the choke in until it is fully off and the engine is running smoothly.
7. Place the throttle at the maximum setting.
8. Position each tool circuit switch to 10 GPM. The tool
can now be used.
9. Reverse the above procedure to stop using the tool.
COLD WEATHER STARTUP
1. Use the procedures below for starting the engine
and using the tool circuits or driving the TracHorse
in cold weather.
2. Hydraulic uids are thicker in cold weather. There-
fore, it is recommended that the engine be run at
low idle long enough to bring the hydraulic uid temperature up to a minimum of 50 °F/10 °C.
3. If the tools and tool hoses are cold, it is recommend-
ed to allow hydraulic uid to circulate through the
tool hoses until warm before using the tools.
SHUTDOWN
1. Ensure each ow selector switch is in the OFF posi-
tion.
2. Move the throttle control to idle.
3. Allow the engine to idle for approximately one minute and move the Ignition Switch to the OFF position.
If the engine runs out of gas or dies during operation
and the ignition switch is left in the ON or RUN
position, this could drain the battery. Make sure the
ignition switch is returned to the OFF position.
14 ► MHP3 User Manual
OPERATION
ADJUSTING THROTTLE FOR
VARIOUS TYPES OF WORK
WARNING
When rst learning to operate the Track Horse,
position the throttle to the SLOW position. More
experienced operators may use higher throttle
settings.
FORWARD TRAVEL
The throttle can be positioned anywhere between slow
and fast for traveling forward depending on the weight of
the load being carried. Heavy loads will require higher
throttle settings and low range in order for the engine to
provide enough power to move the load.
A switch mounted below the throttle control provides
two-speed (FAST & SLOW) operation.
SLOPE OPERATION
WARNING
DO NOT operate the machine on slopes exceeding
60 percent (30°) in the travel direction or across
slopes exceeding 45 percent (24°).
Depending on the load carried in the bed, it may be preferable to back up steep slopes.
If traversing over large obstructions such as railroad rail
or curbs, travel at an angle (45 degrees) to the obstruction. In some cases it may be easier to back over them.
Avoid turning on slopes. If you must turn, turn slowly
downhill, if possible.
DO NOT operate the machine near drop-offs, ditches, or
embankments. The machine could suddenly turn over if
a track goes over the edge or if an edge collapses.
DO NOT try to stabilize the machine if it is tipping over.
Let go of the machine and get out of its way.
REVERSE TRAVEL
WARNING
DO NOT attempt to travel in reverse with the throttle
positioned above SLOW. This may result in loss of
control and result in injury or death to the operator.
Always position the throttle to a slow position for reverse
travel to permit increased control and safety.
Always switch the two-speed control to LOW speed operation when moving in reverse.
TRAVELING FORWARD OR REVERSE
Track Steering Controls
To travel forward, reverse, turn left, or turn right, do the
following:
MHP3 User Manual ◄ 15
OPERATION
Forward Travel
TO MOVE FORWARD IN A STRAIGHT LINE: Move both
the left and right track controls forward at the same time.
TO TRAVEL FORWARD
Move Both Controls
Forward
TO TURN LEFT WHILE MOVING FORWARD: Release
the left track control while pushing forward on the right
track control. Resume pushing forward on the left track
control to move forward in a straight line.
TO TURN RIGHT WHILE
MOVING FORWARD
Release right control
while holding left control
forward
Reverse Travel
WARNING
DO NOT attempt to travel in reverse with the throttle
positioned above SLOW. This may result in loss of
control and result in injury or death to the operator.
TO TURN LEFT WHILE
MOVING FORWARD
Release left control while
holding right control
forward
TO TURN RIGHT WHILE MOVING FORWARD: Release the right track control while pushing forward on the
left track control. Resume pushing forward on the right
track control to move forward in a straight line.
TO MOVE BACKWARDS IN A STRAIGHT LINE: Move
both the left and right track controls backward at the
same time.
TO TRAVEL BACKWARD
Move Both Controls
Backward
16 ► MHP3 User Manual
OPERATION
TO TURN LEFT WHILE MOVING BACKWARD: Release the left track control while pulling backward on the
right track control. Resume pulling backward on the left
track control to move backward in a straight line.
TO TURN LEFT WHILE
MOVING BACKWARD
Release left control while
holding right control
backward
TO TURN RIGHT WHILE MOVING BACKWARD: Release the right track control while pulling backward on
the left track control. Resume pulling backward on the
right track control to move backward in a straight line.
Turning From A Stop
TO TURN LEFT FROM A STOP: Move the right track
control forward moving the left track control backward.
At the same time will increase the turning rate.
TO TURN LEFT
FROM A STOP
Move the right control
forward and the left
control backward
TO TURN RIGHT FROM A STOP: Move the left track
control forward moving the right track control backward.
At the same time will increase the turning rate.
TO TURN RIGHT WHILE
MOVING BACKWARD
Release right control
while holding left control
backward
TO TURN RIGHT
FROM A STOP
Move the left control
forward and the right
control backward
LOADING AND UNLOADING
1. Use loading ramps or a loading dock to load and unload the machine. Ensure loading ramps are strong
enough to support the load. When using ramps, do
not exceed a 15 degree incline (27 percent).
MHP3 User Manual ◄ 17
OPERATION
Loading and unloading of any type of machine is
dangerous. Never attempt to load or unload the
machine without loading ramps or a loading dock.
Loading ramps must be strong enough, have a low
angle, and correct height. Load and unload the
machine on a level surface. Never attempt to load
or unload the machine if the ramp incline exceeds
15 degrees. Failure to follow these instructions may
result in serious injury or death.
2.
Ensure the wheels of the trailer and the tow vehicle
have been chocked front and rear.
3. Use the SLOW throttle setting when loading or
unloading. Always switch the two-speed control to
LOW speed operation when moving in reverse.
4. Drive the machine onto the trailer backwards (en-
gine rst). This will help prevent instability and keeps
the operator “up hill” from the machine during loading and unloading.
5. After loading, place chocks at the front and rear of
the tracks.
LIFTING
The unloaded TracHorse can be lifted using the single
central lift point. Some safety rules may require 3-point
lifting. (Center lift point plus 2-points on forward side of
rails.)
If lifting with any items in the bed, a 3-point lift is required. (A 3-point lifting sling is available, refer to Accessories page.)
TRANSPORTING
1. Read the instructions for loading and unloading in
this section.
2. Use chains and binders to secure the load to the
trailer.
ROUTINE MAINTENANCE
Good maintenance practices will keep the machine on
the job and increase its service life.
A very important maintenance practice is to keep the hy-
draulic uid clean at all times. Contaminated hydraulic
uid causes rapid wear and/or failure of internal parts.
Follow the maintenance instructions contained in the engine manual.
ENGINE MAINTENANCE
Follow the maintenance schedule and general maintenance instructions in the engine maintenance and operation manual furnished with the power unit. Normal
maintenance includes:
• Service foam air pre-cleaner every 25 hours of operation.
• Service air paper cartridge every 100 hours of operation.
• Replace in-line fuel lter every 100-300 hours or
sooner if required.
• Replace spark plugs every 100 hours of operation.
• Change engine oil after rst 5 hours of operation,
then after every 50 hours of operation. If engine has
been operating under heavy load or in high ambient temperature, change the oil every 25 hours of
operation.
• Change oil lter when engine oil is changed.
• Check oil level daily.
• Remove dirt and debris from engine with a cloth or
brush daily. Do not use water spray.
• Clean air cooling system every 100 hours of operation.
HYDRAULIC SYSTEM
MAINTENANCE
Observe the following for maximum performance and
service life from the hydraulic system.
• Always keep hydraulic system and uids clean.
• Keep water out of uid. (See paragraph below.)
• Keep air out of hydraulic lines. Hydraulic system
overheating and foam at the hydraulic tank breather
indicate air is present in the lines. Keep all suction
line ttings and clamps tight.
• Hydraulic system wear is noted by increased heat
during tool operation, reduced tool performance and
eventual system breakdown.
• Operate with the uid temperature at 50–140 °F/
10–60 °C for improved seal and hose life, and maxi-
mum efciency.
18 ► MHP3 User Manual
OPERATION
FILLING THE RESERVOIR
Make sure the engine is stopped before opening the ller cap. Fill slowly with the recommended uid. Add uid
as needed. Secure the ller cap before restarting the
engine. Refer to the hydraulic uid page in this section
for determining correct uid level.
• Change the hydraulic lter element every 200 hours
of operation. Change more often if cold, moist or
dusty conditions exist.
• Check oil cooler for debris. Remove debris with air
pressure.
REMOVING CONDENSED MOISTURE
FROM HYDRAULIC FLUID
Condensation is a frequent problem with cool mobile
hydraulic circuits. This condition occurs in moist or cold
climates. When warm air in the hydraulic tank draws
moisture from the cooler air outside, water accumulates
in the tank.
• Check hydraulic uid level daily. Add uid per specications in this manual (Refer to HYDRAULIC FLU-
ID in this section).
• Remove condensed moisture from the hydraulic
uid by pumping the hydraulic uid into a 5 gal/20l
container through the pressure hose. Make sure the
engine is at idle when performing this procedure.
When the hydraulic reservoir is empty, turn the engine OFF immediately.
• Allow the uid to sit long enough for the water to settle to the bottom of the container.
Slowly pour the uid back into the hydraulic tank, avoiding the water at the bottom of the
container.
CHECKING SUCTION HOSE
Make sure the suction hose (from the hydraulic tank to
the pump inlet) is not kinked and is clamped securely.
This reduces the risk of pump cavitation and sucking air
into the system. All pump ttings should be tight.
CHECKING HYDRAULIC LINES AND
FITTINGS
Check for loose ttings, leaks, etc., throughout the
hydraulic circuit.
• Check hydraulic lines and ttings for leaks, kinks,
etc. daily. Do not use your hand to perform this
check.
ADJUSTING TRACK TENSION
• The track tension is adjusted with the unit lifted off
the ground. Between the drive wheel and front idler
wheel, there are 3 smaller rollers.
• Once the unit is lifted off the ground, adjust the track
tension to achieve 3/8” to ½” sag below the center
small roller.
MHP3 User Manual ◄ 19
TROUBLESHOOTING
If symptoms of poor performance develop, the following chart can be used as a guide to correct the problem.
When diagnosing faults in operation of the machine or tool, always check that the hydraulic power source is supplying the
correct hydraulic ow and pressure as listed in the table. Use a owmeter known to be accurate. Check the ow with the
hydraulic oil temperature at least 80 °F/27 °C.
Problem Cause Solution
Machine will not start. Fuel lter plugged. Replace fuel lter.
No fuel. Add fuel.
Defective spark plugs. Remove plugs, check gap, clean or replace.
Tool circuit switch is on. Turn tool circuit switch off.
Battery not connected. Attach battery cables, check wires.
Weak battery. Test battery, charge or replace.
Solenoid not working. Check solenoid operation and electrical
connections.
Fluid blowing out of uid
reservoir vent.
Machine stalls when track
controls are pushed.
Hydraulic tool will not operate. Tool circuit switch is OFF. Turn tool circuit switch ON.
Hydraulic tank overlled. Correct uid level.
Pump suction leak. Check suction connections.
Not enough throttle. Increase throttle setting/use low range.
Heavy load. Increase throttle setting/use low range.
Over maximum pay load. Max load 1000 lb/454 kg.
Not enough throttle. Move throttle to FAST position.
Incorrect tool/hose connection. Check for correct connections.
Flow selector switch not switched
ON.
Incorrect hose connection to tool. Make sure the tool hose circuit goes from left
Quick disconnect ttings. Detach from hose, connect set together and
Pump coupling defective. With the engine not running: check the coupling
Suction hose kinked. Make sure suction hose from uid reservoir to
Solenoid not working. Check solenoid operation and electrical
Tool is defective. Refer to tool manual.
Relief valve defective. Have machine serviced.
Check that the ow selector switch is set to 5 or
10 gpm.
(pressure) tting to tool and back to the right
tting (return). Fluid always ows from the male to
female ttings.
check for free ow.
between the pump and engine that it is engaged
and is not damaged. Caution: Keep hands clear
of rotating objects.
pump inlet has a smooth curve.
connections.
20 ► MHP3 User Manual
Problem Cause Solution
Machine cannot be moved using
hydraulic controls
FUEL TANK
NOTE: When ordering a fuel tank (item
37) or fuel tank cap (item 35) DO NOT
MIX OLD STYLE TANK AND CAP
WITH NEW STYLE TANK AND CAP.
If you have a power unit and it was purchased prior to 2011 and need to replace the fuel tank or fuel tank cap, you
must purchase the same tank and cap
that came with your unit.
TROUBLESHOOTING
Defective gear box(es) Have machine serviced
One or more defective hydraulic
component
Hydraulic uid level low Check for correct level
Pump coupling defective Have machine serviced
Relief valve stuck open Have machine serviced
Have machine serviced
For example if you have a power unit
prior to 2011 do not purchase a new
style fuel tank, your engine will not be
equipped with a fuel vapor tting.
The old style fuel cap is a vented cap,
while the new style fuel cap is not a
vented cap and venting is achieved thru
the vapor line.
The old style fuel tank has only one fuel
line coming from the tank to the engine.
The new style fuel tank has two lines
coming from the fuel tank to the engine,
one is the fuel line and the other is a fuel
vapor line.
P/N-73050
MHP3 User Manual ◄ 21
SPECIFICATIONS
Engine .................................................................................................................................................. 20 h.p. Honda
Fuel Capacity...................................................................................................................................... 5.5 gal / 20.8 ltr
Fuel Type .................................................................................................Unleaded Gasoline w/ 85 Octane Minimum
Pressure Range................................................................................................................................ 2000 psi/140 bar
Flow Range ...................................................................................................... 2 ea 5 gpm/20 lpm or 10 gpm/38 lpm
Couplers .........................................................................................HTMA/EHTMA Flush Face Type Male & Female
Connect Size and Type ....................................................................................................................................-8 SAE
Weight ..................................................................................................................................................1150 lb/523 kg
Maximum Pay Load ............................................................................................................................. 1000 lb/454 kg
Overall Length ...................................................................................................................................... 78 in./198 cm
Overall Width ........................................................................................................................................... 36 in./92 cm
Overall Height ........................................................................................................................................ 43 in./109 cm
Hydraulic Oil Capacity ...........................................................................................................................3 Gallon/11 ltr
FILTERS
ENGINE
40458 40459 40460 40408 HONDA
HYDRAULIC
OIL FILTER COMMENTSOIL FILTER AIR FILTER FUEL FILTER
ACCESSORIES
DESCRIPTION PART NUMBER
Coupler Nose, 3/8 Port, Bruning........................................................................................................................03972
Coupler Body, 3/8 Port, Bruning ........................................................................................................................ 03973
Coupler Set, 3/8 Port , Bruning (includes nose & body) .................................................................................... 03971
Coupler Nose, 1/2 Port, Bruning........................................................................................................................03975
Coupler Body, 1/2 Port, Bruning ........................................................................................................................ 03976
Coupler Set, 1/2 Port, Bruning (includes nose & body) ..................................................................................... 03974
Hose Assy, 50 ft., with couplers (2 wire braid RR) .............................................................................................58448
Hose Assy, 50 ft., with couplers .........................................................................................................................31848
Hose Assy, 25 ft., with couplers .........................................................................................................................31972
Hose Assy, 25 ft., with couplers (2 wire braid RR) .............................................................................................58451
3-Point Lift Sling ................................................................................................................................................68358
22 ► MHP3 User Manual
MHP3 PARTS ILLUSTRATION
MHP3 MAJOR PARTS ASSEMBLY ILLUSTRATION
ADJUSTING TRACK TENSION
• The track tension is adjusted with the unit lifted off the ground. Between
the drive wheel and front idler wheel, there are 3 smaller rollers.
• Once the unit is lifted off the ground, adjust the track tension to achieve
3/8” to ½” sag below the center small roller.
MHP3 User Manual ◄ 23
MHP3 PARTS LIST
MHP3 PARTS LIST—MAJOR ASSEMBLY
ITEM P/N QTY DESCRIPTION
1 GTR20H12 1 POWER UNIT
GTR20H14 1 POWER UNIT
2 21319 2 CAPSCREW
3 69477 2 LIGHTS – 5” MULTIPURPOSE
4 69490 2 WASHER
5 00719 4 NUT (PART OF ITEM 3)
6 04539 2 WASHER
7 2 NUT (PART OF ITEM 3)
8 1 RECTIFIER
9 69488 2 KNOB
10 69753 2 VALVE HANDLE
11 69465 1 DASH SIDE COVER (L)
12 15661 4 CAPSCREW
13 04539 4 WASHER
14 69463 1 DASH
15 03947 2 CAPSCREW
16 69483 10 SCREW
17 39076 3 BOOT PLATE
18 38549 3 BOOT
19 69485 2 SCREW
21 69475 1 THROTTLE CABLE ASSY
20 04539 4 WASHER
23 69464 1 DASH SIDE COVER (R)
24 69484 8 SCREW
25 370162 4 CAPSCREW
26 370154 2 CAPSCREW
26 370154 2 CAPSCREW
27 04353 12 NUT
28 371067 14 WASHER
29 69491 16 CAPSCREW
30 69467 2 TENSIONER STUD
31 371513 2 NUT
32 69459 6 ROLLERS
33 69472 2 DRIVE MOTOR
34 69474 2 SPROCKET
35 24367 18 CAPSCREW
36 69473 2 RUBBER TRACK
37 69468 1 ROCK GUARD OUTER (R)
69469 1 ROCK GUARD OUTER (L)
(NOT SHOWN)
38 370151 8 CAPSCREW
39 69492 6 CAPSCREW
40 371514 8 NUT
ITEM P/N QTY DESCRIPTION
42 69481 2 TENSIONER SPRING
43 69458 2 IDLER
44 68520 2 CAPSCREW
45 69466 2 IDLER YOKE
46 69470 2 ROCK GUARD INNER
47 69462 1 TAIL GATE
48 69482 2 LATCH
49 69461 1 MAIN BODY (MHP32242100)
69756 1 MAIN BODY W/O BED
(MHP32232100)
50 59046 2 TRACHORSE STICKER
51 47352 3 LIFT POINT STICKER
52 68335 1 THROTTLE STICKER
55 69476 1 THROTTLE KNOB
53 69486 1 2 SPEED SWITCH
54 69487 2 PLUG
56 69489 2 EXHAUST CLAMP
57 69480 1 EXHAUST TURN-DOWN
58 69479 1 MUFFLER
59 69478 1 EXHAUST PIPE
68334 1 DASH DECAL
00719 2 NUT, VALVE TO DASH (NOT
SHOWN)
370154 4 CAPSCREW
24 ► MHP3 User Manual
MHP3 PARTS ILLUSTRATION
HOSE & FITTING ILLUSTRATION
MHP3 User Manual ◄ 25
MHP3 PARTS LIST
MHP3 PARTS LIST—HOSE & FITTING
ITEM P/N QTY DESCRIPTION
1 69493 2 CONTROL VALVE
2 69495 4 STRAIGHT THREAD ADAPTOR
3 69496 2 STRAIGHT THREAD ELBOW
4 69497 4 STRAIGHT THREAD ADAPTOR
5 69503 2 HOSE ASSEMBLY
6 69504 2 HOSE ASSEMBLY
7 69505 2 HOSE ASSEMBLY
8 69506 2 HOSE ASSEMBLY
9 69507 2 HOSE ASSEMBLY
10 69494 2 SOLENOID VALVE
11 18556 2 STRAIGHT THREAD CONNECTOR
12 69500 2 SWIVEL NUT RUN TEE
13 350044 2 SWIVEL NUT RUN TEE
14 350059 4 STRAIGHT THREAD ELBOW
15 69501 4 STRAIGHT THREAD ADAPTOR BSPP-
37° JIC
16 69502 2 STRAIGHT THREAD ADAPTOR BSPP-
37° JIC
17 69498 2 REDUCER
18 69499 2 FEMALE JIC 37° SWIVEL
19 62199 4 HOSE CLAMP
20 08045 4 HOSE CLAMP
21 04875 2 HOSE, 54 IN. LONG
22 68083 1 EXTENSION ELBOW ASSY
23 40364 2 ELBOW 45-DEG -12 SAE 3/4 PUSH
ON
24 04306 1 HOSE ASSY 18 IN. LONG
25 68547 1 HOSE ASSY
26 68546 1 HOSE ASSY
27 04860 2 STRAIGHT THREAD ELBOW
28 59105 1 ADAPTER 3/4 NPT × 3/4 HOSE
29 59089 1 HOSE 19 INCH LONG
30 58569 1 ELBOW
31 02773 1 STRAIGHT THREAD CONNECTOR
32 27695 1 HYD PUMP
33 68374 1 HOSE ASSY
34 68500 1 ELBOW
35 06960 1 ELBOW
36 350103 1 MALE CONNECTOR 10-8 FTX
ITEM P/N QTY DESCRIPTION
37 68373 1 HOSE ASSY
38 04867 2 HOSE END BARB
39 69508 3 PLATE
40 03947 2 CAPSCREW
41 04539 4 WASHER
42 00719 2 NUT
68501 1 FIRE SLEEVE (NOT SHOWN)
(PROTECTS ITEM 29 HOSE)
26 ► MHP3 User Manual
MHP3 PARTS ILLUSTRATION
MHP3 ELECTRIC WIRING SCHEMATIC
MAIN WIRE HARNESS (DUAL CIRCUIT) P/N-62294
MHP3 User Manual ◄ 27
MHP3 PARTS ILLUSTRATION
MHP3 POWER UNIT FRAME ILLUSTRATION & PARTS LIST
ITEM P/N QTY DESCRIPTION
4 58718 2 COUPLER SET (GTR20H12)
66784 2 COUPLER SET (GTR20H14)
5 58718 2 COUPLER SET (GTR20H12)
66785 2 COUPLER SET (GTR20H14)
6 60962 2 CAPSCREW, 1/4 IN. -20
7 69802 1 MANIFOLD ASSY, DUAL CIRCUIT
(INCL 22–25, 27–29, 31, 33, 34)
8 59126 1 DASH DECAL
10 68336 1 DECAL, DUAL CIRCUIT
11 60963 1 KNOB (PART OF ITEM 13)
12 60955 1 2-WAY SWITCH
13 67899 1 ROTARY SWITCH
14 60956 2 3-WAY SWITCH
15 60946 1 HOUR METER
16 66065 1 FRAME WELDMENT
17 23530 2 HEX FLANGE BOLT, 3/8 IN. -16
28 ► MHP3 User Manual
ITEM P/N QTY DESCRIPTION
20 59079 1 COOLER GUARD
21 59095 2 FLANGE NUT, 1/4 IN. -20
22 59074 2 HEX FLANGE BOLT
23 35004 1 1 HOLLOW HEX PLUG 4 SAE
24 68528 2 PORT PLUG
25 8104 1 HOLLOW HEX PLUG 6 SAE
27 62319 2 DIRECTIONAL VALVE
28 2 CAP (INCL WITH ITEM 27)
29 60958 2 COIL
31 60960 1 COMBINER VALVE
32 62298 1 CHOKE CABLE ASSY
33 62320 1 SOLENOID COIL
34 1 NUT (INCL WITH ITEM 31)
MHP3 PARTS ILLUSTRATION
MHP3 HONDA ENGINE ILLUSTRATION
MHP3 User Manual ◄ 29
MHP3 PARTS LIST
MHP3 HONDA ENGINE PARTS LIST
ITEM P/N QTY DESCRIPTION
4 71976 1 HONDA ENGINE ASSY (INCLUDES:
RECTIFIER, RECTIFIER HARNESS,
EXHAUST MANIFOLD, STUB SHAFT
AND MISC HARDWARE.
5 56656 1 COUPLING
6 7819 1 SQUARE KEY
7 7860 2 CAPSCREW, 3/8-16 × 1-1/4
8 31765 1 PRESSURE SWITCH
9 12787 4 FLANGE NUT, 5/16
10 24287 1 CLAMP
11 59076 1 BUSHING
12 20990 1 KEY
13 59103 1 BLOWER HUB
14 111 3 CAPSCREW, 10-24
15 40080 1 FILTER ASSY
16 43687 1 CAPSCREW, M8 × 16
17 64937 1 GRIP PLATE
18 51292 1 STD THREAD UNION
19 17821 4 BUTTON HEAD HS, 1/4 × 20
20 60945 3 WASHER, 1/4 IN. ID
21 15476 3 CAPSCREW, 1/2 -20 UNC
22 59080 1 FRONT GRILLE
23 59091 1 COOLER
24 7860 2 CAPSCREW, 3/8-16
25 68499 1 HYDRAULIC TANK
26 62296 2 WEATHER STRIP
27 65107 1 BLOWER WHEEL-BRAZED
28 59074 4 HEX FLANGE BOLT, 1/4 -20
31 58897 1 FRAME BASE WELDMENT
34 27695 1 PUMP, DUAL
35 71794 1 FUEL CAP
36 60920 2 GROMMET
37 73050 1 FUEL TANK
38 4303 1 BATTERY
39 60921 1 BATTERY COVER
40 15476 1 CAPSCREW, 1/4-20
41 60945 1 WASHER, 1/4
42 40433 9 HEX FLANGE BOLT, 5/16
43 58942 4 HEX FLANGE BOLT, 5/16
44 1459 4 LOCKWASHER, 3/8
46 18893 4 FLANGE NUT
50 59083 1 BLOWER HOUSING
ITEM P/N QTY DESCRIPTION
51 56655 1 PUMP MOUNT
52 60919 1 FUEL ELBOW
53 62385 2 STUD
54 371503 1 NUT
70 72317 1 5/16” SPRING HOSE CLAMP
71 72848 2 7/16” SPRING HOSE CLAMP
72 72846 1 FUEL VAPOR HOSE 30”
73 72242 1 FUEL HOSE 36”
74 71586 1 STUB SHAFT
75 60949 3 WASHER
76 60950 3 HSHCS, M8 × 55
79 1 RECTIFIER (PART OF ENGINE ASSY)
81 37294 1 WIRE HARNESS
83 62404 1 MAG KILL WIRE
84 62405 1 FUEL SHUTOFF WIRE
87 72238 1 HEAT SHIELD
89 68136 1 EXHAUST MANIFOLD (PART OF
ENGINE ASSY)
90 2 NUT
91 66788 1 SIGHT GAGE (NOT PICTURED)
92 62332 1 WIRE ASSY, BLACK
93 35395 1 WIRE ASSY, RED
62294 1 MAIN WIRE HARNESS (DUAL CIRCUIT)
30 ► MHP3 User Manual
Stanley Hydraulic Tools
3810 SE Naef Road
Milwaukie, Oregon 97267-5698 USA
(503) 659-5660 / Fax (503) 652-1780
www.stanleyhydraulic.com
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