Stanley GT13 Guide

GT13
HYDRAULIC
POWER UNIT
SAFETY, OPERATION AND MAINTENANCE
USER’S MANUAL
Stanley Hydraulic Tools
3810 SE Naef Road
Milwaukie OR 97267-5698
503-659-5660
FAX [phone]
www.stanleyhydraulic.com
Copyright © 2008, The Stanley Works
68369 3/2009 Ver 2
SERIOUS INJURY OR DEATH
COULD RESULT FROM IMPROP-
ER REPAIR OR SERVICE OF THIS
TOOL.
REPAIRS AND/OR SERVICE TO
THIS TOOL MUST ONLY BE PER-
FORMED BY AN AUTHORIZED
AND CERTIFIED DEALER.

TABLE OF CONTENTS
3
For the nearest authorized and certified dealer, call Stanley Hydraulic Tools at the number listed on the
back of this manual and ask for a Customer Service Representative.
SERVICING THE STANLEY POWER UNIT: This manual contains safety, operation, and routine mainte-
nance instructions. Stanley Hydraulic Tools recommends that servicing of hydraulic tools, other than
routine maintenance, must be performed by an authorized and certified dealer. Please read the following
warning.
SERIOUS INJURY OR DEATH COULD RESULT FROM THE IM-
PROPER REPAIR OR SERVICE OF THIS TOOL.
REPAIRS AND / OR SERVICE TO THIS TOOL MUST ONLY BE
DONE BY AN AUTHORIZED AND CERTIFIED DEALER.
Safety Symbols.........................................................................................4
Safety Precautions ...................................................................................5
Tool Stickers & Tags .................................................................................6
Hydraulic Hose Requirements..................................................................7
HTMA Requirements................................................................................9
Operation................................................................................................10
Routine Maintenance..............................................................................14
Testing & Troubleshooting......................................................................15
Specifications .........................................................................................17
Parts Lists & Illustrations........................................................................18
Warranty.................................................................................................21

4
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 equip-
ment.
This safety alert and signal word indicate an imminently hazardous situa-
tion which, if not avoided, will result in death or serious injury.
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.
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 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, may result in minor or moderate injury.
This signal word indicates a potentially hazardous situation which, if not
avoided, may result in property damage or damage to the equipment.
This signal word indicates a situation which, if not avoided, may result in
damage to the equipment.
SAFETY SYMBOLS

5
Tool operators and maintenance personnel must always comply with the safety precau-
tions given in this manual and on the stickers and tags attached to the equipment.
These safety precautions are given for your safety. Review them carefully before operat-
ing the tool and before performing general maintenance or repairs.
Supervising personnel should develop additional precautions relating to the specific
work area and local safety regulations. If so, place the added precautions in the space
provided on page 4.
In addition to this manual, read and understand safety and operating instructions in the
Engine Operation Manual furnished with the power unit.
The GT13 Hydraulic Power Unit will provide safe and dependable service if operated in
accordance with the instructions given in this manual. Read and understand this manual
and any stickers and tags attached to the Power Unit. Failure to do so could result in
personal injury or equipment damage.
• Operator must start in a work area without bystanders. The operator must be familiar with all prohibited work areas such as
excessive slopes and dangerous terrain conditions.
• Establish a training program for all operators to ensure safe operation.
• Do not operate the power unit unless thoroughly trained or under the supervision of an instructor.
• Always wear safety equipment such as goggles, ear, head protection, and safety shoes at all times when operating the
power unit and a hydraulic tool.
• Do not inspect or clean the power unit while it is running. Accidental engagement of the unit can cause serious injury.
• Always use hoses and fittings rated at 2500 psi/172 bar with a 4 to 1 safety factor. Be sure all hose connections are tight.
• Be sure all hoses are connected for correct flow direction to and from the tool being used.
• Do not inspect hoses and fittings for leaks by using bare hands. “Pin-hole” leaks can penetrate the skin.
• NEVER OPERATE THE POWER UNIT INA CLOSED SPACE. Inhalation of engine exhaust can be fatal.
• Do not operate a damaged, improperly adjusted power unit.
• Never wear loose clothing that can get entangled in the working parts of the power unit.
• Keep all parts of your body away from the working parts of the power unit.
• Keep clear of hot engine exhaust.
• Do not add fuel to the power unit while the power unit is running or is still hot.
• Do not operate the power unit if gasoline odor is present.
• Do not use flammable solvents around the power unit engine.
• Do not operate the power unit within 3.3 ft/1 m of buildings, obstructions or flammable objects.
• Do not reverse tool rotation direction by changing fluid flow direction.
• Allow power unit engine to cool before storing in an enclosed space.
• Always keep critical tool markings, such as labels and warning stickers legible.
• To avoid personal injury or equipment damage, all tool repair, maintenance and service must only be performed by autho-
rized and properly trained personnel.
SAFETY PRECAUTIONS

6
TOOL STICKERS & TAGS
68321
Power Unit Dash Decal

7
HYDRAULIC HOSE REQUIREMENTS
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:
Certified non-conductive - constructed of thermoplastic or synthetic rubber inner tube, synthetic fiber
braid reinforcement, and weather resistant thermoplastic or synthetic rubber cover. Hose labeled certified 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 rein-
forcement, and weather resistant synthetic rubber cover. This hose is conductive and must never be used near
electrical conductors.
Fabric-braided (not certified or labeled non-conductive) - constucted of thermoplastic or synthetic rubber
inner tube, synthetic fiber braid reinforcement, and weather resistant thermoplastic or synthetic rubber cover. This
hose is not certified 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 Hydrau-
lic 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.
SIDE 1 SIDE 2
D A N G E R
DO NOT REMOVE THIS TAG
D A N G E R
1 FAILURE TO USE HYDRAULIC HOSE LABELEDAND CERTIFIEDAS NON-CONDUCTIVE
WHEN USING HYDRAULIC TOOLS ON OR NEAR ELECTRIC LINES MAYRESULT 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 ORAROUND
ELECTRIC LINES.
2. BEFORE USING HYDRAULIC HOSE LABELED AND CERTIFIEDAS NON-CONDUCTIVE ON
OR NEAR ELECTRIC LINES. WIPE THE ENTIRE LENGTH OF THE HOSEAND FITTING
WITH ACLEAN DRYABSORBENT CLOTH TO REMOVE DIRTAND MOSISTURE ANDTEST
HOSE FOR MAXIMUM ALLOWABLE CURRENT LEAKAGE INACCORDANCE WITH SAFETY
DEPARTMENT INSTRUCTIONS.
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 FARAWAYAS POSSIBLE FROM BODYAND DO NOT PERMIT DIRECT CONTACT
DURING USE. CONTACTATTHE 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 PULLOR LIFT TOOLS, POWER UNITS, ETC.
5. CHECK ENTIRE HOSE FOR CUTS CRACKS LEAKS ABRASIONS, BULGES, OR DAMAGE TO
COUPLINGS IF ANYOF THESE CONDITIONS EXIST, REPLACE THE HOSE IMMEDIATELY.
NEVER USE TAPE OR ANYDEVICE TOATTEMPT TO MEND THE HOSE.
6. AFTER EACH USE STORE INACLEAN DRYAREA.
3(shown smaller than actual size)
(shown smaller than actual size)
D A N G E R
DO NOT REMOVE THIS TAG
D A N G E R
1 DO NOT USE THIS HYDRAULIC HOSE ON OR NEAR ELECTRIC LINES. THIS HOSE IS
NOT LABELED OR CERTIFIEDAS 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 ORAROUND
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 FARAWAYAS POSSIBLE FROM BODYAND DO NOT PERMIT DIRECT CONTACT
DURING USE. CONTACTATTHE 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 LIFTTOOLS, POWER UNITS, ETC.
DO NOT REMOVE THIS TAG
5. CHECK ENTIRE HOSE FOR CUTS CRACKS LEAKS ABRASIONS, BULGES, OR DAMAGE TO
COUPLINGS IF ANYOF THESE CONDITIONS EXIST, REPLACE THE HOSE IMMEDIATELY.
NEVER USE TAPE OR ANYDEVICE TOATTEMPT TO MEND THE HOSE.
6. AFTER EACH USE STORE INACLEAN DRYAREA.
SEE OTHER SIDE
SIDE 1 SIDE 2

8
Oil Flow Hose Lengths Inside Diameter USE
(Press/Return)
Min. Working Pressure
GPM LPM FEET METERS INCH MM PSI BAR
Certified 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
Typical Hose Connections
Tool to Hydraulic Circuit Hose Recom- mendations The chart to the right shows recommended mini- mum hose diameters for various hose lengths based on gallons per minute (gpm)/liters per min- ute (lpm). These recommendations are intended to keep return line pressure (back pressure) to a minimum acceptable level to ensure maximum tool performance. This chart is intended to be used for hydraulic tool applications only based on Stanley Hydraulic 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 maximum hydraulic system relief valve setting. All hydraulic hose must meet or exceed specifi- cations as set forth by SAE J517.
PRESSURE
RETURN
<<< FLOW
FLOW >>>

9
HTMA REQUIREMENTS
FLOW RATE
TOOL 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. fluid viscosity of:
(at min. operating temperature)
TEMPERATURE
Sufficient heat rejection capacity
to limit max. fluid temperature to:
(at max. expected ambient temperature)
Min. cooling capacity
at a temperature difference of
between ambient and fluid 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-flow filtration
Sized for flow of at least:
(For cold temp. startup and max. dirt-holding capacity)
HYDRAULIC FLUID
Petroleum based
(premium grade, anti-wear, non-conductive)
VISCOSITY
(at min. and max. operating temps)
NOTE:
When choosing hydraulic fluid, the expected oil temperature extremes that will be experienced in service determine the
most suitable temperature viscosity characteristics. Hydraulic fluids with a viscosity index over 140 will meet the require-
ments over a wide range of operating temperatures.
*SSU = Saybolt Seconds Universal
4-6 gpm 7-9 gpm 11-13 gpm 9-10.5 gpm
(15-23 lpm) (26-34 lpm) (42-49 lpm) (34-40 lpm)
2000 psi 2000 psi 2000 psi 2000 psi
(138 bar) (138 bar) (138 bar) (138 bar)
2100-2250 psi 2100-2250 psi 2100-2250 psi 2200-2300 psi
(145-155 bar) (145-155 bar) (145-155 bar) (152-159 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 7 hp 6 hp
(2.24 kW) (3.73 kW) (4.47 kW) (5.22 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)
TOOL CATEGORY
HYDRAULIC SYSTEM
REQUIREMENTS TYPE I TYPEII TYPEIII TYPE RR
NOTE:
These are general hydraulic system requirements. See tool Specification page for tool specific requirements.

10
PREPARATION FOR USE
Do not operate the power unit until you have read the
engine operating and maintenance instructions manual
furnished with the unit.
1. ENGINE CRANKCASE OIL LEVEL
Always check the engine oil level before starting the en-
gine. Make sure the oil level is at the FULL MARK on the
dipstick. Do not overfill. Use 4-stroke motor oil that meets
or exceeds the requirements for API service classifications
SJ or later as specified in the engine operating and mainte-
nance manual. Refer to the engine manual for oil viscosity
grade.
2. ENGINE FUEL LEVEL
Check the fuel level. If low, fill with un-leaded gasoline with
a minimum of pump octane of 86 or higher or a research
octane of 91 or higher. Refer to the engine manual for for
details.
3. HYDRAULIC FLUID
Check the sight gauge on the hydraulic fluid reservoir for
the proper fiuid level. Use fluids meeting the following
specifications.
Viscosity (Fluid Thickness)
U.S. METRIC
50°F 450 SSU Maximum 10°C 95 C.S.
100°F 130-200 SSU 38°C 27-42 C.S.
140°F 85 SSU Minimum 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 fluids work well over a wide temperature
range, allow moisture to settle out and resist biological
growth that may occur in cool operating hydraulic circuits.
These fluids are recommended by Stanley. Other fluids
that meet or exceed the specifications of these fluids 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
4. HYDRAULIC CONNECTIONS
The recommended hose length is 25 ft/8 m with a 1/2
inch/12.7 mm inside diameter. The hoses must have a
working pressure rating of at least 2500 psi/175 bar. Each
hose end must have male thread ends compatible with
H.T.M.A. (HYDRAULIC TOOL MANUFACTURERS AS-
SOCIATION) quick disconnect fittings (NPT type threads).
(See Figure 2.)
Figure 1. Panel Control Valve
Facing the panel control valve, the bottom male quick
disconnect fitting is the PRESSURE FLUID OUT fitting. The
top female quick disconnect fitting is the RETURN FLUID
IN fitting.
QUICK DISCONNECT COUPLERS
H.T.M.A. approved quick disconnect couplings are installed
to hydraulic hoses so that the direction of oil flow is always
from the male to the female quick disconnect as shown in
figure 2. Quick disconnect couplings and hose fittings are
selected so that additional fittings such as reducer or adapt-
er fittings are not required.
If adapter fittings are used, they must be approved steel
hydraulic fittings meeting a minimum operating pressure
rating of 2500 psi/172 bar. Do not use galvanized pipe fit-
tings or black pipe fittings.
DO NOT OVERTIGHTEN THE FITTINGS.
OPERATION

11
CONTROLS
The Power Unit provides one circuit, with an oil flow of 7
gpm/26 lpm up to 2000 psi/140 bar.
Figure 3. Panel and Control Lever
One hydraulic tool can be connected to the tool circuit. The
circuit is activated by moving the control lever to the "ON"
position.
THROTTLE CONTROL
The Power Unit is equipped with an automatic throttle con-
trol that permits the operator to select one of 2 operating
modes—automatic throttle or manual throttle. See figure 4.
Figure 4. Throttle Control Knob
Automatic throttle Control
In this mode, engine speed varies with hydraulic circuit
pressure during tool use to maintain a constant 7 gpm/26
lpm. When a tool is not being used the engine will return to
idle automatically.
Automatic Throttle Control is set by positioning the adjust-
ment knob (shown in figure 4) to the far right and tightening
it to maintain its position.
Manual Throttle Control
In this mode, engine speed is manually held at full throttle
to maintain 7 gpm/26 lpm. When a tool is not being used
the engine will not return to idle until the manual setting is
removed.
Typical conditions requiring the manual throttle control are:
CONTROL PANEL
RETURN
PRESSURE
H.T.M.A. 1/2 INCH MALE
QUICK DISCONNECT
COUPLER
H.T.M.A. 1/2 INCH FE-
MALE QUICK DISCON-
NECT COUPLER
1/2 INCH I.D. HOSE, 25 FT
LONG WITH 2500 PSI/
172 BAR RATING AND
4 TO 1 SAFETY FACTOR
PRESSURE RETURN
1/2 INCH MALE PIPE HOSE END
1/2 INCH MALE PIPE HOSE END
ADAPTER, 3/8 INCH MALE PIPE x
-8 SAE O-RING
H.T.M.A. 1/2 INCH MALE
QUICK DISCONNECT
COUPLER
H.T.M.A. 1/2 INCH FE-
MALE QUICK DISCON-
NECT COUPLER
TOOL RETURN
Figure 2. Hydraulic Connections
OPERATION
PRESSURE
Knob

12
• When operating drills or grinders or pumps, tool rpm
must be maintained even when load requirements are
light.
OPERATION
Shown above in Figure 5 are the primary engine compo-
nents referred to in this section. Become familiar with these
components and read and understand the engine operation
and maintenance manual before starting the engine and
operating the power unit for the first time.
Before starting the engine, make sure the throttle
control knob is set for "Auotmatic Throttle Con-
trol".
START-UP
1. Check the engine oil level.
2. Check the hydraulic oil level.
Manual Throttle Control is set by positioning the knob
(shown in figure 4.) to the far left and tightening it to main-
tain its position.
START-UP
Figure 5. Engine Components
3. Check that the engine fuel tank is full.
Explosion and fire hazard.
Checking the engine fuel level or refueling the engine
when it is hot or running can result in an explosion
and/or fire that may result in death or serious injury.
Do not remove the fuel cap while the engine is running
or. Do not add fuel to the tank while the engine is hot.
Do not fill the fuel tank to a point of overflowing.
4. Ensure the automatic throttle control knob is set to the
"automatic throttle" position.

13
OPERATION
5. Move the choke lever to the CLOSED position as shown
in figure 6.
Figure 6. Choke Lever
6. Move the fuel valve lever to the ON position as shown in
figure 7.
Figure 7. Fuel Lever
7. Position the engine ON-OFF switch to the ON position
as shown in figure 8.
Figure 8. ON-OFF Switch
8. Pull the starter grip on the recoil starter until you feel
resistance. Then pull firmly upward. Do not allow the starter
grip to snap back against the engine. Return it gently.
9. After the engine starts, allow it to warm up. Gradually
adjust the choke until it is in the open position.
10. Connect hoses and the tool as desrcribed on pages 9
and 10.
11. Set the throttle control for "automatic" or "manual"
operation.
12.Move the tool circuit control lever to the ON position.
When finished operating the tool, move the tool circuit con-
trol lever to the OFF positon.
COLD WEATHER STARTUP
1. Use the procedures described under "STARTUP" and
then follow the procedure below.
2. Hydraulic fluids are thicker in cold weather. Therefore,
it is recommended that the engine be run at low idle long
enough to bring the fluid temperature up to a minimum of
50°F/10°C.
3. If the tools and tool hoses are cold, it is recommended
to allow hydraulic fluid to circulate through the tool hoses
until warm before using the tool.
SHUTDOWN
1. Ensure the tool circuit control lever is in the OFF posi-
tion.
2. Unless already at idle the power unit should return to
idle if operating in the "automatic" mode. If operating in
the manual mode, move the knob to the far right position
and tighten it to maintain its position.
3. Allow the engine to idle for approximately one minute
and move the engine switch to the OFF position.

14
STORAGE
• Clean the unit thoroughly before storage. Do not use
water pressure.
• Always store the unit in a clean and dry facility.
• If the unit will be stored for a prolonged period (over 30
days), add a fuel additive to the fuel tank to prevent the fuel
from gumming. Run engine for a short period to circulate
the additive.
• Replace crankcase oil with new oil.
• Remove the spark plug and pour approximately 1 ounce
(30 ml) of engine oil into the cylinder. Replace the spark
plug and crank the engine slowly to distribute the oil.
• Check hydraulic reservoir for water. If water is found,
change the oil and circulate it through the tool hose and
tool. (See "HYDRAULIC SYSTEM MAINTENANCE" earlier
in this section).
ENGINE MAINTENANCE
Follow the maintenance schedule and general maintenance
instructions in the engine maintenance and operation
manual furnished with the power unit.
HYDRAULIC SYSTEM MAINTENANCE
• Check hydraulic fluid level daily. Add fluid per specifica-
tions in this manual. (See "HYDRAULIC FLUID" under the
section titled "OPERATING INSTRUCTIONS".
• Remove condensed moisture from the hydraulic
fluid by pumping the hydraulic fluid into a 5 gal/20 l con-
tainer 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 fluid to sit long enough for the water to settle to
the bottom of the container. Slowly pour the fluid back into
the hydraulic tank, avoiding the water at the bottom of the
container.
• Each day, check hydraulic lines and fittings for leaks,
kinks, etc. Do not use your hand to perform this check.
• Change the hydraulic filter element every 200 hours of
operation. Change more often if cold, moist or dusty condi-
tions exist.
• Check oil cooler for debris. Remove debris with air pres-
sure.
ROUTINE MAINTENANCE

15
GENERAL
Tests and adjustments should be performed periodically to
ensure the power unit is operating at maximum efficiency.
Stanley Circuit Tester (part number 04182) is recommend-
ed. This tester can be used to isolate problems in both the
engine and hydraulic system prior to any power unit disas-
sembly.
TESTING THE HYDRAULIC CIRCUIT
The following tests can be performed to ensure that the
hydraulic pump is supplying the correct flow and pressure
and that the system relief valve is operating properly.
During these tests, make sure the engine is warm and op-
erating smoothly. If test results are not as specified, refer to
the troubleshooting table in this section for possible causes.
TESTING THE 7 GPM HTMA TYPE 1 CIRCUIT
To test the circuit, proceed as follows:
1. Set the throttle control knob to the automatic position.
2. Connect the Stanley Circuit Tester across the hose ends
(where the tool would normally be connected).
3. Fully open the tester restrictor valve (counterclockwise).
TESTING & TROUBLESHOOTING
4. Start the engine and allow it to run until warm.
5. With the engine at full operating speed, the test flow
gauge should read 7 gpm/26 lpm.
6. Slowly turn the restrictor valve clockwise while watching
the pressure gauge. The flow rate should stay at 7 gpm/26
lpm as the pressure gauge reaches 2100-2200 psi/148-155
bar.
7. At 2100-2200 psi/148-155 bar, the relief valve should
begin to open. The pressure at which the relief valve just
begins to open is commonly referred to as the "cracking
pressure". At the "cracking pressure," the flow rate should
start to drop because the relief valve is allowing fluid to by-
pass to the hydraulic reservoir. The "cracking pressure" is
preset at the factory and if it is not within the above range,
the relief valve must be re-set as follows:
a. The relief valve is located behind the dash panel in the
manifold assembly. Use an open end or box end wrench to
loosen the nut on the relief valve.
b. Use an Allen wrench to adjust the relief valve. Turn
clockwise to raise the pressure and counterclockwise to
reduce the pressure.
c. Tighten the nut and retest.

16
TROUBLESHOOTING
PROBLEM CAUSE REMEDY
Engine will not start. No fuel. Add Fuel.
Fuel filter plugged. Replace fuel filter.
Defective spark plug. Remove plug, check gap, clean or
replace.
Fluid blowing out of fluid Hydraulic tank overfilled. Correct the fluid level.
reservoir vent.
Pump suction leak. Check suction connections. Tighten if
necessary.
Hydraulic tool won't operate. Incorrect hose connection to Make sure the tool hose circuit goes
tool. from left (pressure) fitting to tool
and back to the right fitting (return).
Fluid always flows from the male to
female fittings.
Quick disconnect fittings Detach from hose, connect set
defective. together and check for free flow.
Hydraulic fluid level low. Check for correct fluid level. Fill
using the recommended fluid.
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.
Relief valve stuck open. Adjust or replace valve.
Suction hose kinked. Make sure suction hose from fluid
reservoir to pump inlet has a smooth
curve.
Tool is defective. Refer to tool manual.

17
Engine: ...............................................................................................................................................Honda GX390 4 stroke
Horsepower.........................................................................................................................................................................11
Capacity......................................................................................................................................... One 7 gpm/26 lpm Circuit
Length:.......................................................................................................................................................26.25 in. / 66.7 cm
Width: ........................................................................................................................................................20.75 in. / 52.7 cm
Height:..........................................................................................................................................................21.25 in. / 54 cm
Weight (Wet): ...................................................................................................................................162 lb / 73.5 kg
Fuel Tank Capacity:........................................................................................................................................ 1.6 gal. / 6.1 ltr
Hydraulic Reservor Capacity:.......................................................................................................................... 1.5 gal / 5.7 ltr
Relief Valve "crack" setting........................................................................................................................ 2150 psi / 145 bar
Full relief setting ........................................................................................................................................ 2400 psi / 172 bar
HTMA/EHTMACategory..................................................................................Flow Rate 7 gpm / 26 lpm
..............................................................................................................Nominal Pressure 1500 psi / 103 bar
.................................................................................................................... Max Pressure 2150 psi / 138 bar
Vibration Level.................................................................................................................................................................. N/A
SPECIFICATIONS

18
GT13 PARTS ILLUSTRATION
Location of Automatic Throttle Bracket

19
GT13 PARTS ILLUSTRATION CONTINUED
Engine mounting Wheel to Frame Placement

20
GT13 PARTS LIST
Item Part No. Qty Description
1 68355 1 Hose Assy
2 02633 1 Knob
3 67329 1 Hose Assy
4 350036 1 Elbow
5 60774 2 Clamp
6 68212 1 Sight Gauge
7 67289 1 Oil Reservoir
8 67285 1 Valve Manifold
9 00856 1 Connector, Straight Thread
10 58857 1 Coupler, Male
11 58856 1 Coupler, Female
12 67308 1 Filter
13 67313 1 Elbow
14 59131 1 Relief Valve
15 12787 4 Nut
16 67318 1 Hose Barb
17 67354 1 Bracket Weldment
18 60945 11 Washer
19 59074 11 Capscrew
20 60962 3 Capscrew
21 67288 1 Blower Housing
22 23530 4 Bolt, Hex Flange
23 59075 3 Bolt, Hex Flange
24 26831 3 Washer
25 67327 1 Hose
26 67610 4 Clamp
27 67313 1 Elbow
28 04864 1 Adapter
29 00145 4 Washer
30 00144 4 Capscrew
31 67292 1 Hydraulic Pump
32 67319 1 Elbow
33 67287 1 Oil Cooler
34 67328 1 Hose Assy
35 67507 1 Guard Weldment
36 67511 1 Rubber Mount
37 67510 1 Reaction Plate
38 08667 6 Screw
39 56690 1 Inlet Ring
40 08669 1 Gasket
41 60953 4 Capscrew
42 67291 1 Pump Adapter
43 06180 1 Capscrew
44 67294 1 Washer
45 67290 1 Coupler
46 08035 1 Blower Wheel
47 68299 1 Cylinder Assy (Incld Items 57-65)
48 07819 1 Key
49 67284 1 Engine, Honda GX390QA2
50 68367 1 Bracket Weldment
51 68304 1 Tube Clamp
52 68346 1 Throttle Lever
53 68354 1 Roll Pin
54 68368 1 Bracket
55 68345 1 Knob
Item Part No. Qty Description
56 68353 2 Capscrew
57 67464 1 Rod End
58 68324 1 Nut
59 00026 1 O-ring
60 67541 1 Cap
61 01605 1 O-ring
62 67463 1 Cylinder
63 67466 1 Rod
64 67467 1 Spring
65 67469 1 Adapter
66 04860 1 Elbow
67 67286 1 Adapter
68 67594 1 Cap
69 68174 1 Dash Panel
70 68176 2 Bumper
71 59074 4 Capscrew
72 68321 1 Sticker, Dash
73 68357 2 Capscrew
74 59095 6 Nut, Flange
75 68187 4 Washer, Nylon
76 03906 3 Nut
77 68170 1 Handle
78 40435 2 Bolt, Flange
79 No Item
80 68177 2 Wheel
81 68184 2 Axle
82 09210 2 Nut
83 68178 1 Lower Frame Weldment
84 18893 6 Nut, Flange
85 21713 2 Bumper
86 24282 2 Capscrew
87 68356 2 Capscrew
88 40433 2 Bolt, Flange
89 68157 1 Upper Frame Weldment
90 68175 1 Lift Bracket
91 370502 1 Capscrew
92 68515 1 Rod
93 68396 1 Handle Hub
94 22674 1 Set Screw
95 23399 1 Backup Ring
96 51184 1 Cap Screw
97 49159 1 Lockwasher
98 68518 1 Nut
99 00596 2 Capscrew