Stanley Black & Decker GT23 user guide
GT23
HYDRAULIC
POWER UNIT
USER’S MANUAL
SAFETY, OPERATION AND MAINTENANCE
© 2014 Stanley Black & Decker, Inc.
New Britain, CT 06053
U.S.A.
69405 10/2014 Ver. 7
NOTES
2 GT23 User Manual
WARNING
TABLE OF CONTENTS
SAFETY SYMBOLS ........................................................................................................................................................................ 4
SAFETY PRECAUTIONS ............................................................................................................................................................... 5
TOOL STICKERS & TAGS ............................................................................................................................................................. 6
HYDRAULIC HOSE REQUIREMENTS .......................................................................................................................................... 7
HOSE SAFETY TAGS .................................................................................................................................................................... 7
HOSE RECOMMENDATIONS ........................................................................................................................................................ 8
HTMA REQUIREMENTS ................................................................................................................................................................ 9
OPERATION ................................................................................................................................................................................. 10
PREPARATION FOR USE ............................................................................................................................................................ 10
CONTROLS .................................................................................................................................................................................. 12
STARTUP ...................................................................................................................................................................................... 12
FOR 8 GPM OPERATION ............................................................................................................................................................ 12
FOR 12 GPM OPERATION .......................................................................................................................................................... 12
COLD WEATHER STARTUP ........................................................................................................................................................ 13
SHUTDOWN ................................................................................................................................................................................. 13
ROUTINE MAINTENANCE ........................................................................................................................................................... 14
STORAGE .................................................................................................................................................................................... 14
PROGRAMMABLE CONTROLLER .............................................................................................................................................. 15
TROUBLESHOOTING GUIDELINES ........................................................................................................................................... 15
FAULT CODES ............................................................................................................................................................................. 16
TESTING & TROUBLESHOOTING .............................................................................................................................................. 17
TESTING THE HYDRAULIC CIRCUIT ......................................................................................................................................... 17
TESTING THE 8 GPM HTMA TYPE II CIRCUIT .......................................................................................................................... 17
OR THE 12 GPM TYPE III CIRCUIT ............................................................................................................................................ 17
TROUBLESHOOTING .................................................................................................................................................................. 18
SPECIFICATIONS ........................................................................................................................................................................ 19
BRIGGS ENGINE ASSEMBLY ..................................................................................................................................................... 20
BRIGGS ENGINE PARTS LIST .................................................................................................................................................... 21
FUEL TANK & CAP ....................................................................................................................................................................... 22
FRAME PARTS ............................................................................................................................................................................. 23
HOSES, FITTINGS & CLAMPS .................................................................................................................................................... 24
MAIN POWER UNIT WIRING HARNESS .................................................................................................................................... 25
IMPORTANT
To ll out a Product Warranty Validation form, and for information on your warranty,
visit Stanleyhydraulics.com and select the Company tab, Warranty.
(NOTE: The warranty Validation record must be submitted to validate the warranty).
SERVICING: This manual contains safety, operation, and routine maintenance instructions. Stanley
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 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.
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.
GT23 User Manual 3
DANGER
WARNING
CAUTION
CAUTION
NOTICE
IMPORTANT
SAFETY SYMBOLS
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 GT23 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 equipment.
These safety precautions are given for your safety. Review them carefully before operating the tool and before performing
general maintenance or repairs.
Supervising personnel should develop additional precautions relating to the specic 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 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 ttings 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 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.
• NEVER OPERATE THE POWER UNIT IN A 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 ammable solvents around the power unit engine.
• Do not operate the power unit within 3.3 ft/1 m of buildings, obstructions or ammable objects.
• Do not reverse tool rotation direction by changing uid ow 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.
GT23 User Manual 5
Stanley Dash Sticker 62302
Single Circuit Sticker 68595
DASH DECALS
6 GT23 User Manual
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:
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 reinforcement, 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) - constucted 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
D A N G E R
1 FAILURE TO USE HYDRAULIC HOSE LABELED AND CERTIFIED AS 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 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 MOSISTURE AND TEST
HOSE FOR MAXIMUM ALLOWABLE CURRENT LEAKAGE IN ACCORDANCE WITH SAFETY
DEPARTMENT INSTRUCTIONS.
DO NOT REMOVE THIS TAG
SIDE 1 SIDE 2
3
SEE OTHER SIDE
(shown smaller than actual size)
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 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.
D A N G E R
SEE OTHER SIDE
DO NOT REMOVE THIS TAG
THE TAG SHOWN BELOW IS ATTACHED TO “CONDUCTIVE” HOSE.
D A N G E R
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
SIDE 1 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.
D A N G E R
SEE OTHER SIDE
(shown smaller than actual size)
DO NOT REMOVE THIS TAG
GT23 User Manual 7
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 >>>
Typical Hose Connections
Tool to Hydraulic Circuit Hose Recom-
mendations
8 GT23 User Manual
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 speci-
cations as set forth by SAE J517.
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