Troubleshooting - Stanley IW12 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 wrench, always check that the hydraulic power source is supplying the correct
hydraulic flow and pressure to the tool as listed in the following table. Use a flow meter known to be accurate. Check
the flow with the hydraulic fluid temperature at least 80 °F/27 °C.
PROBLEM
Low performance or impact.
Wrench runs too fast. Impact
mechanism or screws broken.
Grease leaks at anvil busing,
wrench warm.
Grease leaks at anvil bushing,
wrench cold.
Oil leak at motor cap face.
Oil leaks at reversing spool.

TROUBLESHOOTING

CAUSE
Incorrect hydraulic flow.
Defective quick disconnects.
Worn impact mechanism.
Hammer pins broken.
Incorrect grease or periodic
maintenance of the impact
mechanism is not being performed.
Spools incorrectly installed.
Sockets or adapters too heavy or
loose.
Long bolt with lubricated head.
Incorrect hydraulic flow (too high).
Supply and return hoses reversed.
Relief sleeve or spring damaged.
Adjusting screw is in too far.
Hard duty cycle and heat forces
grease out.
Main shaft O-ring leaking.
Fasteners loose.
Face O-ring worn or missing.
Motor cap/main housing damaged.
Damaged O-rings.
Wrong hydraulic fluid. Circuit too
hot.
SOLUTION
Check that the hydraulic power source
is producing 4–12 gpm/15–45 lpm at
1000–2000 psi/70–140 bar.
Check each quick disconnect.
Repair or replace the impact
mechanism. See Service Mechanism
Removal Cleaning and Installation
procedure to extend mechanism life.
Replace with integral frame (with
pins). Check relief adjustment screw
setting. Job may require a larger
wrench.
See Service Manual.
Valve(s) incorrectly reassembled. See
Service Manual.
Use the correct impact type sockets or
adapters.
Lubricate threads only.
Check that hydraulic power source
is producing 4-12 gpm/15-45 lpm at
1000-2000 psi/70-140 bar.
Install hoses correctly. Refer to
Operation section in this manual.
Remove and replace spool assembly.
Adjust correctly.
Normal unless greasing instructions in
Service Manual are not followed.
Replace as required.
Tighten to recommended torque.
Replace as required.
Replace as required.
Replace as required. Check Service
Manual to avoid cutting O-rings on
cross holes in the spool bore.
Refer to Operation section for correct
fluid/circuit specifications.
IW12 User Manual ◄ 13