Greenlee H8508-1 User manual

OPERATION MANUAL
H8508 Series
Impact Wrenches
Read and understand all of the instructions and
safety information in this manual before operating
or servicing this tool.
Register this product at www.greenlee.com
52041907 REV 1 © 2010 Greenlee Textron Inc. 1/10
Serial Codes AKP, AKT, AKW, and AKY
Español............... 13
Français.............. 25
Deutsch .............. 37
Italiano................ 49

H8508 Series Impact Wrenches
Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
2
Purpose of this Manual
This manual is intended to familiarize all personnel with
the safe operation and maintenance procedures for the
following Greenlee Utility hydraulic impact wrenches:
H8508-1 Serial Code AKP
H8508-1V Serial Code AKT
H8508-3 Serial Code AKW
H8508-3V Serial Code AKY
Keep this manual available to all personnel.
Replacement manuals are available upon request at no
charge at www.greenlee.com.
Other Publications
Tool Owners/Users
SAE Standard J1273 (Hose and Hose Assemblies):
Publication 99930323
Authorized Greenlee Utility Service Centers
Repair Manuals:
H8508-1 Publication 52041908
H8508-1V Publication 52041909
H8508-3 Publication 52041931
H8508-3V Publication 52041932
All specications are nominal and may change as design
improvements occur. Greenlee Textron Inc. shall not be liable for
damages resulting from misapplication or misuse of its products.
Super Spool is a trademark of Greenlee Textron Inc.
Super Spool™ is protected by U.S. Patent No. 4548229.
KEEP THIS MANUAL
Table of Contents
Description, Safety, Purpose of this Manual ................. 2
Other Publications......................................................... 2
Important Safety Information .....................................3–4
Identication.................................................................. 5
Specications................................................................ 6
Setting the Super Spool™............................................. 7
Installing and Removing Accessories............................ 7
Hoses and Fittings ........................................................ 8
Typical Setup................................................................. 8
Hose Connections......................................................... 8
Setup............................................................................. 9
Operation..................................................................9–10
Maintenance................................................................ 10
Troubleshooting........................................................... 11
Accessories................................................................. 12
Español...................................................................13–24
Français..................................................................25–36
Deutsch ..................................................................37–48
Italiano....................................................................49–60
Description
Greenlee Utility Impact Wrenches are intended for use
with impact-type sockets, screwdriver bits, and wood
bits. The operating pressure range for all models is
68.9 to 138 bar (1000 to 2000 psi). All models feature a
directional spool for forward or reverse operation and an
insulated handle for operator comfort and safety.
Some models include additional features:
Super Spool™ for use on either an open-center
or closed-center hydraulic system, variable torque,
and a quick-change hex chuck.
Safety
Safety is essential in the use and maintenance of
Greenlee Utility tools and equipment. This instruction
manual and any markings on the tool provide informa-
tion for avoiding hazards and unsafe practices related to
the use of this tool. Observe all of the safety information
provided.

H8508 Series Impact Wrenches
Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
3
IMPORTANT SAFETY INFORMATION
SAFETY
ALERT
SYMBOL
This symbol is used to call your attention to hazards
or unsafe practices which could result in an injury or
property damage. The signal word, dened below,
indicates the severity of the hazard. The message
after the signal word provides information for pre-
venting or avoiding the hazard.
Immediate hazards which, if not avoided, WILL result
in severe injury or death.
Hazards which, if not avoided, COULD result in
severe injury or death.
Hazards or unsafe practices which, if not avoided,
MAY result in injury or property damage.
Read and understand all of the
instructions and safety information
in this manual before operating or
servicing this tool.
Failure to observe this warning could
result in severe injury or death.
Electric shock hazard:
This tool is not insulated. When using
this unit near energized electrical lines:
Use only certied non-conductive •
hoses and proper personal protec-
tive equipment.
Select and maintain the hydraulic •
uid to meet the minimum dielectric
standards required by your safety
department.
Failure to observe this warning could
result in severe injury or death.
Skin injection hazard:
Do not use hands to check for leaks.•
Do not hold hose or couplers while•
the hydraulic system is pressurized.
Depressurize the hydraulic system•
before servicing.
Oil under pressure easily punctures
skin causing serious injury, gangrene,
or death. If you are injured by escaping
oil, seek medical attention immediately.
Wear eye protection when operating or
servicing this tool.
Failure to wear eye protection could
result in serious eye injury from ying
debris or hydraulic oil.
Use accessories that are approved for impact use • only. Accessories that are not approved for impact
applications can break when used with impact-type
tools.
Inspect accessories before use. Discard accessories• that have cracks, chips, or gouges.
Failure to observe this warning could result in severe
injury or death.

H8508 Series Impact Wrenches
Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
4
IMPORTANT SAFETY INFORMATION
Keep all parts of the body away from rotating parts • when the tool is in operation. Contact with moving
parts can result in severe injury.
Do not change accessories, inspect, or clean tool when • it is connected to a power source. Accidental start-up
can result in serious injury.
Maintain a rm grip on tool, using both hands at all • times. Serious injury can result if an operator does
not control the tool.
Do not lock trigger in the power-ON position. • Operator can not stop tool when trigger is locked.
Failure to observe these warnings could result in
severe injury or death.
Tool and accessory may be hot during
and after operation.
Contact with hot surfaces could result
in serious injury.
Do not exceed the following hydraulic power source
maximums:
Hydraulic ow: 38 l/min (10 gpm)•
Pressure relief: 138 bar (2000 psi)•
Back pressure: 13.8 bar (200 psi)•
Failure to observe this warning could result in severe
injury or death.
Do not disconnect tool, hoses, or ttings while
the power source is running or if the hydraulic uid is
hot. Hot hydraulic uid could cause serious burns.
Do not reverse hydraulic ow. Operation with hydraulic
ow reversed can cause tool malfunction. Connect the
supply (pressure) hose and return (tank) hose to the
proper tool ports.
Failure to observe this warning could result in severe
injury or death.
Wear protective gloves when handling, removing •
and installing drill bits. Drill bits can cut even when
stationary.
Inspect tool before use. Replace any worn or• damaged parts. A damaged or improperly
assembled tool can malfunction, injuring nearby
personnel.
Inspect the hydraulic hoses and couplings every• operating day. Repair or replace if leakage, cracking,
wear, or damage is evident. Damaged hoses or cou-
plings can fail, resulting in injury or property damage.
Use this tool for manufacturer’s intended use only. • Use other than that which is described in this
manual could result in injury or property damage.
Make sure all bystanders are clear of the work area •
when handling, starting, and operating the tool.
Nearby personnel can be injured by ying parts in the
event of a tool malfunction.
Procedure for connecting or disconnecting hydraulic
hoses, ttings, or components:
1. Move the ow lever on the hydraulic power source
to the OFF position.
2. Stop the hydraulic power source.
3. Follow the sequence under “Hose Connections” to
prevent pressure buildup. In case some pressure
has built up, loosen hoses, ttings, or components
slowly.
Emergency stop procedure:
1. Release the trigger.
2. Shut off the hydraulic power source.
Note: Keep all decals clean and legible, and replace
when necessary.

H8508 Series Impact Wrenches
Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
5
Identification
1
10 8
7
6
5
4
3
2
9
1
8
7
6
5
4
3
2
9
H8508-1V
H8508-3V
1. Trigger
2. Quick-Change Chuck
3. Drive Shank
4. Motor Cap
5. Serial Number
6. Directional Spool
7. Super Spool™
8. Tank Port
9. Pressure Port
10. Variable Torque Output Screw* or Non-adjustable Torque Output Plug*
* This feature is not available on all models.
H8508-1
H8508-3

H8508 Series Impact Wrenches
Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
6
Specifications
Impact Wrench
Type of Hydraulic System.............................Open-center
or closed-center
Hydraulic Pressure Port.....3/4–16 UNF SAE O-ring Boss
Hydraulic Return Port........3/4–16 UNF SAE O-ring Boss
Output @ 30.3 l/min (8 gpm)
RPM (no load) ...................................................... 6500
Impacts per Minute (no load) ............................... 1300
Torque.................................................. 542 Nm (400 ft-lb)
Drive Size .........................................1/2" square drive w/
7/16" hex quick-change chuck
Noise Level............................................................85 Lwa
Mass/Weight
H8508-1 ................................................. 3.4 kg (7.4 lb)
H8508-1V............................................... 3.5 kg (7.7 lb)
H8508-3 ................................................. 4.0 kg (8.8 lb)
H8508-3V............................................... 4.1 kg (9.0 lb)
Length
H8508-1, 1V...........................................208 mm (8.2")
H8508-3, 3V...........................................221 mm (8.7")
Width ..........................................................107 mm (4.2")
Height.......................................................269 mm (10.6")
Hydraulic Power Source
Do not exceed the following hydraulic power source
maximums:
Hydraulic ow: 38 l/min (10 gpm)•
Pressure relief: 138 bar (2000 psi)•
Back pressure: 13.8 bar (200 psi)•
Failure to observe this warning could result in severe
injury or death.
Type of Hydraulic System.............................Open-center
or closed-center
Flow
Minimum ......................................... 15.1 l/min (4 gpm)
Recommended.............18.9 to 30.3 l/min (5 to 8 gpm)
Maximum ......................................... 38 l/min (10 gpm)
Filtration.............................................10 Micron (nominal)
Pressure Relief Setting ........................ 138 bar (2000 psi)
Back Pressure (maximum*) .................. 13.8 bar (200 psi)
* 13.8 bar (200 psi) is the maximum agreed standard back pressure
for the HTMA (Hydraulic Tool Manufacturers Association).
Greenlee Utility tool will operate satisfactorily at this standard.
1. Maximum hydraulic uid temperature must not
exceed 60 °C (140 °F). A sufcient oil cooling
capacity is needed to limit the hydraulic uid
temperature.
2. Hydraulic ow must not exceed 38 l/min (10 gpm).
Install a ow meter in the return line to measure to
rate of hydraulic ow before using the tool.
3. Pressure relief valve setting must not exceed
138 bar (2000 psi) at your tool’s maximum ow.
Locate the pressure relief valve in the supply circuit
to limit excessive hydraulic pressure to the tool.
Hydraulic Schematic
FILTER
(10 MICRON)
COOLER
RELIEF
VALVE
138 bar
(2000 psi)
CONTROL
VALVE FLOW METER
T
PTOOL
RESERVOIR
PUMP
POWER SOURCE
Recommended Hydraulic Fluids
Use any non-detergent, petroleum-based hydraulic
uid which meets the following specications or HTMA
specications.
S.U.S. @
38 °C (100 °F).............................................. 140 to 225
99 °C (210 °F)........................................... 40 minimum
Flash Point................................ 170 °C (340 °F) minimum
Pour Point.................................. -34 °C (-30 °F) minimum

H8508 Series Impact Wrenches
Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
7
Setting the Super Spool™
The Super Spool allows the tool to be used with either
open-center or closed-center hydraulic systems.
1. Insert a screwdriver into the spool recess.
2. If using:
Open-center hydraulic system, turn the • Super Spool counterclockwise until it stops.
Closed-center hydraulic system, turn the • Super Spool clockwise until it stops.
C
O
Installing and Removing Accessories
Use accessories that are approved for impact use • only. Accessories that are not approved for impact
applications can break when used with impact-type
tools.
Inspect accessories before use. Discard accessories• that have cracks, chips, or gouges.
Failure to observe this warning could result in severe
injury or death.
Impact Bits and Screwdriver Bits
Greenlee Utility recommends using Greenlee impact-
style bits.
Some bits may whip or bend under sideload.
Do not use bits with a long spiral and center support.•
When using an impact bit, run the power source at •
minimum ow.
Failure to observe these warnings could result in
severe injury or death.
Long SpiralCenter Support
x
1. Inspect the quick change chuck. Remove any dirt or
other contamination.
2. Slide and hold the chuck away from the tool and
remove the 1/2" adapter.
3. Insert the drill bit into the tool and release the chuck.
4. To remove the drill bit, slide and hold the chuck
away from the tool and remove the bit.
1/2" Socket Drive Adapter and Sockets
1. Inspect the quick change chuck. Remove any dirt or
other contamination.
2. Slide and hold the chuck away from the tool and
install the 1/2" adapter. Release the chuck.
3. Install the socket onto the adapter.
4. To remove the socket adapter, remove the socket
from the adapter. Slide and hold the chuck away
from the tool and remove the adapter.

H8508 Series Impact Wrenches
Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
8
Hoses and Fittings
Installation and Maintenance
Refer to publication 99930323, SAE J1273
(Hose and Hose Assemblies).
Replacement
Refer to a Greenlee Utility catalog or publication
99910322, Low Pressure Quick Couplers, Adapters and
Hoses.
Do not disconnect tool, hoses, or ttings while
the power source is running or if the hydraulic uid is
hot. Hot hydraulic uid could cause serious burns.
Hose Connections
Tool Port Identification
Match the markings on your tool to this table.
Pressure Port Return Port
PT
Connecting Hoses
1. Move the ow lever on the hydraulic power source
to the OFF position.
2. Stop the hydraulic power source.
3. Connect the return hose to the return port on the
hydraulic power source, and then to the return port
on the tool.
4. Connect the pressure hose to the pressure port on the
tool, then to the pressure port on the hydraulic power
source.
Disconnecting Hoses
1. Move the ow lever on the hydraulic power source
to the OFF position.
2. Stop the hydraulic power source.
3. Disconnect the pressure hose from the hydraulic
power source, and then from the tool.
4. Disconnect the return hose from the tool, and then
from the hydraulic power source.
5. Install dust caps over the ports to prevent
contamination.
Typical Setup

H8508 Series Impact Wrenches
Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
9
Setup
Do not exceed the following hydraulic power source
maximums:
Hydraulic ow: 38 l/min (10 gpm)•
Pressure relief: 138 bar (2000 psi)•
Back pressure: 13.8 bar (200 psi)•
Failure to observe this warning could result in severe
injury or death.
Do not reverse hydraulic ow. Operation with hydraulic
ow reversed can cause tool malfunction. Connect the
supply (pressure) hose and return (tank) hose to the
proper tool ports.
Failure to observe this warning could result in severe
injury or death.
1. Stop the hydraulic power source.
2. Install an accessory according to the instructions
under “Installing and Removing Accessories.”
3. Connect the tool to the power source according to
the instructions under “Hose Connections.”
Operation
Electric shock hazard:
This tool is not insulated. When using
this unit near energized electrical lines:
Use only certied non-conductive •
hoses and proper personal protec-
tive equipment.
Select and maintain the hydraulic •
uid to meet the minimum dielectric
standards required by your safety
department.
Failure to observe this warning could
result in severe injury or death.
Skin injection hazard:
Do not use hands to check for leaks.•
Do not hold hose or couplers while•
the hydraulic system is pressurized.
Depressurize the hydraulic system•
before servicing.
Oil under pressure easily punctures
skin causing serious injury, gangrene,
or death. If you are injured by escaping
oil, seek medical attention immediately.
Do not change accessories, inspect or clean tool when it
is connected to a power source. Accidental start-up can
result in serious injury.
Failure to observe this warning could result in severe
injury or death.
Wear eye protection when operating or
servicing this tool.
Failure to wear eye protection could
result in serious eye injury from ying
debris or hydraulic oil.
Emergency stop procedure:
1. Release the trigger.
2. Shut off the hydraulic power source.

H8508 Series Impact Wrenches
Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
10
Maintenance
Wear eye protection when operating or
servicing this tool.
Failure to wear eye protection could
result in serious eye injury from ying
debris or hydraulic oil.
Do not change accessories, inspect, or clean tool when it
is connected to a power source. Accidental start-up can
result in serious injury.
Failure to observe this warning could result in severe
injury or death.
Use this maintenance schedule to maximize the tool’s
service life.
Note:
Keep all decals clean and legible, and replace when•
necessary.
When disposing of any components (hydraulic hoses,•
hydraulic fluid, worn parts, etc.), do so in accordance
with federal, state, and local laws or ordinances.
Daily
1. Wipe all tool surfaces clean.
2. Inspect the hydraulic hoses and ttings for signs of
leaks, cracks, wear, or damage. Replace if necessary.
3. Install dust caps over the hydraulic ports when the
tool is disconnected.
Monthly
Perform a thorough inspection of the hydraulic hoses
and ttings as described in publication 99930323,
SAE J1273 (Hose and Hose Assemblies).
Operation (cont’d)
1. Start the power source.
Note: Allow the power source to run for a few
minutes to warm the hydraulic fluid.
2. Set the directional spool to the appropriate position
(forward or reverse).
Do not change the position of the directional spool
while the tool is operating. Allow the tool to stop
before changing direction.
Failure to observe this precaution can result in
property damage.
3. Grasp the handle. Place your other hand on the top
of the tool or on the auxiliary handle. This will allow
you to apply leverage while operating the tool.
4. To start the tool, squeeze the trigger.
Variable torque models only:• Use the variable
torque adjustment to achieve the necessary amount
of torque. Turn the variable torque output screw
counterclockwise to increase torque, or clockwise
to decrease the torque.
All models:• If 5 seconds of impacting does
not loosen a bolt, nut, etc., stop impacting and
use some other method of removal. Continued
impacting will cause severe wear on the impact
mechanism.
5. To stop the tool, release the trigger.
6. When the tool is not in use, stop the power source
to reduce heat and wear on tool components.