Stanley MHP3 User manual

© 2012 Stanley Black & Decker, Inc.
New Britain, CT 06053
U.S.A.
68589 11/2015 Ver. 9
MHP3
TracHorse
USER MANUAL
Safety, Operation and Maintenance

2 ► MHP3 User Manual
NOTES

MHP3 User Manual ◄ 3
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 certied dealer. Please read the following warning.
For the nearest authorized and certied dealer, call Stanley Hydraulic Tools at the number listed on the back of this
manual and ask for a Customer Service Representative.
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.
IMPORTANT
To ll out a Product Warranty Recording form, and for information on your warranty,
visit Stanleyhydraulics.com and select the Company tab, Warranty.
(NOTE: The warranty recording form must be submitted to validate the warranty).
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
TABLE OF CONTENTS

4 MHP3 Manual
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 mainte-
nance personnel.
Safety symbols and signal words, as shown below, are used to emphasize all operator, maintenance and repair ac-
tions 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.
DANGER
This safety alert and signal word indicate an imminently hazardous situation
which, if not avoided, will result in death or serious injury.
WARNING
This safety alert and signal word indicate a potentially hazardous situation
which, if not avoided, could result in death or serious injury.
CAUTION
This safety alert and signal word indicate a potentially hazardous situation
which, if not avoided, could result in death or serious injury.
CAUTION
This signal word indicates a potentially hazardous situation which, if not avoid-
ed, may result in property damage.
NOTICE
This signal word indicates a situation which, if not avoided, will result in damage
to the equipment.
IMPORTANT
This signal word indicates a situation which, if not avoided, may result in dam-
age to the equipment.
SAFETY SYMBOLS

MHP3 User Manual 5
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. Re-
view them carefully before operating the machine and
before performing general maintenance or routine ser-
vice.
Supervising personnel should develop additional pre-
cautions relating to the specic 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 manu-
al, 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 in-
jury, or death.
• Operate the machine in a work area WITHOUT BY-
STANDERS. 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 conned areas
where there may be a risk of crushing the operator
between the machine and another object.
• DO NOT OPERATE THE TRACHORSE IN EN-
CLOSED 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 hy-
draulic 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 pres-
ent.
• 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 en-
sure 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 hy-
draulic tools.
• DO NOT inspect or clean the machine while the en-
gine is running. Accidental engagement of the ma-
chine 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 over-
heating of the hydraulic system.
• Before operating hydraulic tools, read and under-
stand the operation manual furnished with the tool.
• DO NOT operate a damaged, or improperly adjust-
ed, 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 weld-
ing or acetylene cutting of the equipment.
• Prevent possible personal injury or equipment dam-
age 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 de-
sign capacity.
• Always keep critical markings, such as labels and
warning stickers legible.
• Always replace parts with replacement parts recom-
mended 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.
SAFETY PRECAUTIONS

6 MHP3 Manual
• Always be well-rested and mentally alert when op-
erating 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 con-
nections are tight.
• Be sure all hoses are correct for current ow direc-
tion to and from the tool being used.
• DO NOT inspect hoses and ttings for leaks by us-
ing 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 com-
ponents. Electrocution or burns could result from
improper contact.
• When using pressure cleaning equipment, do not
aim the jet directly at electrical components. Make
sure these components are covered or protected.
Do not place the water jet directly in the air lter,
exhaust or air intake ports of the engine.
SAFETY PRECAUTIONS

MHP3 User Manual 7
59126
Dash Sticker
68336
Dual Tool Circuit Sticker
68335
Throttle
Sticker
68334
Limit Engine Speed Sticker
47352
Lift Point
Sticker
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.
All operators mustread, understand, and followALL safteyprecautions
and operatinginstructions found in owners manual before operatingtool.
Engine,exhaust, and other surfaces of tool may be hot.Avoid accidental
contact with hot surfaces.Allowtool to cool before maintenance or
storage.
59126
Dash Sticker (Closer View)
TOOL STICKERS & TAGS

8 MHP3 Manual
The rated working pressure of the hydraulic hose must be equal to or higher than the relief valve setting on the hy-
draulic system. There are three types of hydraulic hose that meet this requirement and are authorized for use with
Stanley Hydraulic Tools. They are:
Certied non-conductive — constructed of thermoplastic or synthetic rubber inner tube, synthetic ber braid
reinforcement, and weather resistant thermoplastic or synthetic rubber cover. Hose labeled certied 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 certied or labeled non-conductive) — constructed of thermoplastic or synthetic rubber in-
ner tube, synthetic ber braid reinforcement, and weather resistant thermoplastic or synthetic rubber cover. This
hose is not certied 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
THE TAG SHOWN BELOW IS ATTACHED TO “CONDUCTIVE” HOSE.
(Shown smaller than actual size)
SIDE 1
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 PROP-
ERLY 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 FIT-
TING 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.
SEE OTHER SIDE
SIDE 2
DO NOT REMOVE THIS TAG
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.
SEE OTHER SIDE
DANGER
DO NOT REMOVE THIS TAG
DANGER
(Shown smaller than actual size)
SIDE 2
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.
DANGER
DO NOT REMOVE THIS TAG
DANGER
SIDE 1
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 ELEC-
TRIC 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
DANGER
SEE OTHER SIDE SEE OTHER SIDE
HOSE TYPES

MHP3 User Manual 9
Oil Flow Hose Lengths Inside Diameter USE
(Press/Return)
Min. Working Pressure
GPM LPM FEET METERS INCH MM PSI BAR
Certied Non-Conductive Hose - Fiber Braid - for Utility Bucket Trucks
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 5-10.5 19-40 100-300 30-90 5/8 16 Pressure 2500 175
3/4 19 Return 2500 175
10-13 38-49 up to 50 up to 15 5/8 16 Both 2500 175 10-13 38-49 51-100 15-30 5/8 16 Pressure 2500 175
3/4 19 Return 2500 175
10-13 38-49 100-200 30-60 3/4 19 Pressure 2500 175
1 25.4 Return 2500 175
13-16 49-60 up to 25 up to 8
5/8 16 Pressure 2500 175 3/4 19 Return 2500 175
13-16 49-60 26-100 8-30
3/4 19 Pressure 2500 175
1 25.4 Return 2500 175
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 specications as set forth by SAE J517.
PRESSURE
RETURN
<<< FLOW
FLOW >>>
HOSE RECOMMENDATIONS

10 MHP3 Manual
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: Sufcient 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)
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
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)
100-400 ssu* 100-400 ssu* 100-400 ssu* 100-400 ssu*
(20-82 centistokes)
HTMA
HYDRAULIC SYSTEM REQUIREMENTS
NOTE: These are general hydraulic system requirements. See tool specication page for tool specic requirements
TOOL TYPE
HTMA / EHTMA REQUIREMENTS
TYPE I TYPE II TYPE III
TYPE RR
BCD
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)
EHTMA
HYDRAULIC SYSTEM
REQUIREMENTS
CLASSIFICATION
Flow Range
Nominal Operating Pressure
(at the power supply outlet)
System relief valve setting
(at the power supply outlet) 2495 psi 2000 psi 2000 psi 2000 psi 2000 psi
(172 bar) (138 bar) (138 bar) (138 bar) (138 bar)
HTMA / EHTMA REQUIREMENTS

MHP3 User Manual 11
HTMA 1/2 INCH FEMALE QUICK DISCONNECT
COUPLER
(STANLEY P/N 58856 COUPLER BODY or STANLEY
P/N 58718 COUPLER SET – NOSE & BODY)
HTMA 1/2 INCH MALE QUICK DISCONNECT
COUPLER
(STANLEY P/N 58857 COUPLER NOSE 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)
POWER UNIT PANEL
HOSE & FITTING CONNECTIONS

12 ► MHP3 User Manual
PRE OPERATION PROCEDURES
PREPARATION FOR INITIAL USE
Connect the battery cables to the battery. Other than
connecting the battery, no special unpacking or assem-
bly requirements prior to usage. Inspection to assure
the equipment was not damaged in shipping, does not
contain packing debris, and checking uid levels as de-
scribed 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 overll. Use detergent oil classied “For Service
SE, SF, SG” as specied in the engine operating and
maintenance manual.
The engine oil dipstick is located on the right side of the
Honda engine.
Engine Oil
Dipstick
Engine Oil
Filler Cap
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 fre-
quency interference.
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, main-
tenance-free battery and is fully charged.
Make sure the battery cables are tight and charging cir-
cuit functions are operating properly.
HYDRAULIC FLUID
Check the sight gauge in the hydraulic uid reservoir for
the proper uid level.
NOTICE
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.
NOTICE
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.
NOTICE
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.
OPERATION

MHP3 User Manual ◄ 13
PRESSURE (OUT) RETURN (IN)
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 up-
per 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 PRES-
SURE 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.
3. Ensure the tool circuit switches are in the OFF posi-
tion.
4. Pull the choke out until it stops.
RECOMMENDED HYDRAULIC OILS
Below is a list of recommended oils by brand.
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. Fol-
low 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 (RE-
TURN) tting.
OPERATION
Brand Biodegradable Description
CITGO No Hydurance AW32
AMS Oil No HVH 32
Exxon Mobil No Univis HVI26*
Exxon Mobil No DTE 10 Excel
Shell No S2 V 32
Chevron No Rando HDZ 32
Conoco Phillips No Unax AW-WR-32
Clarion (CITGO) Yes Green Bio 32
Exxon Mobil Yes EAL 224H
Chevron Yes Clarity AW32
Terresolve Yes Envirologic 132
Shell Yes Naturelle HF-E-32
*Recommended for extreme cold temperatures

14 ► MHP3 User Manual
5. Turn the ignition switch clockwise to begin cranking
the engine. Use short starting cycles (15 seconds
per minute) to prolong starter life. Extended crank-
ing 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 run-
ning 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 posi-
tion.
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 crank-
ing 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 run-
ning 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 tem-
perature 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 min-
ute and move the Ignition Switch to the OFF posi-
tion.
NOTICE
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.
OPERATION

MHP3 User Manual ◄ 15
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 pref-
erable to back up steep slopes.
If traversing over large obstructions such as railroad rail
or curbs, travel at an angle (45 degrees) to the obstruc-
tion. 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.
TRAVELING FORWARD OR REVERSE
Track Steering Controls
To travel forward, reverse, turn left, or turn right, do the
following:
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.
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 op-
eration when moving in reverse.
OPERATION

16 ► MHP3 User Manual
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 MOVE BACKWARDS IN A STRAIGHT LINE: Move
both the left and right track controls backward at the
same time.
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 LEFT WHILE
MOVING FORWARD
Release left control while
holding right control
forward
TO TURN RIGHT WHILE MOVING FORWARD: Re-
lease 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 TRAVEL BACKWARD
Move Both Controls
Backward
OPERATION

MHP3 User Manual ◄ 17
TO TURN LEFT WHILE MOVING BACKWARD: Re-
lease 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: Re-
lease 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
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 un-
load the machine. Ensure loading ramps are strong
enough to support the load. When using ramps, do
not exceed a 15 degree incline (27 percent).
TO TURN RIGHT WHILE
MOVING BACKWARD
Release right control
while holding left control
backward
OPERATION

18 ► MHP3 User Manual
2.
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.
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 load-
ing 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 re-
quired. (A 3-point lifting sling is available, refer to Acces-
sories 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 en-
gine manual.
ENGINE MAINTENANCE
Follow the maintenance schedule and general mainte-
nance instructions in the engine maintenance and op-
eration manual furnished with the power unit. Normal
maintenance includes:
• Service foam air pre-cleaner every 25 hours of op-
eration.
• Service air paper cartridge every 100 hours of op-
eration.
• 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 ambi-
ent 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 opera-
tion.
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 efciency.
OPERATION

MHP3 User Manual ◄ 19
CLEANING THE TRACHORSE
When using pressure cleaning equipment, do not aim
the jet directly at electrical components. Make sure these
components are covered or protected. Do not place the
water jet directly in the air lter, exhaust or air intake
ports of the engine. After unit has been cleaned blow dry
with air. On electrical conections, use dieelectric grease
on terminals.
FILLING THE RESERVOIR
Make sure the engine is stopped before opening the ll-
er 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 speci-
cations 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 en-
gine OFF immediately.
• Allow the uid to sit long enough for the wa-
ter to settle to the bottom of the container.
Slowly pour the uid back into the hydrau-
lic 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.
• 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.
ADJUSTING TRACK TENSION
OPERATION

20 ► MHP3 User Manual
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.
Hydraulic tank overlled. Correct uid level.
Pump suction leak. Check suction connections.
Machine stalls when track
controls are pushed.
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.
Hydraulic tool will not operate. Tool circuit switch is OFF. Turn tool circuit switch ON.
Not enough throttle. Move throttle to FAST position.
Incorrect tool/hose connection. Check for correct connections.
Flow selector switch not switched
ON.
Check that the ow selector switch is set to 5 or
10 gpm.
Incorrect hose connection to tool. Make sure the tool hose circuit goes from left
(pressure) tting to tool and back to the right
tting (return). Fluid always ows from the male to
female ttings.
Quick disconnect ttings. Detach from hose, connect set together and
check for free ow.
Pump coupling defective. With the engine not running: check the coupling
between the pump and engine that it is engaged
and is not damaged. Caution: Keep hands clear
of rotating objects.
Suction hose kinked. Make sure suction hose from uid reservoir to
pump inlet has a smooth curve.
Solenoid not working. Check solenoid operation and electrical
connections.
Tool is defective. Refer to tool manual.
Relief valve defective. Have machine serviced.
TROUBLESHOOTING