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5.4 Troubleshooting
Symptom
Cause
Remedy
Wrench does not
advance or retract.
Hydraulic coupling is
damaged.
Replace the coupling.
Hydraulic coupling is
not connected.
Be sure that advance
and retract hoses are
connected at both pump
and wrench. Check that
all hose couplings are
fully installed.
Worn or damaged
directional control valve
on the hydraulic pump.
Take pump to
authorized service
center. Make repairs as
required.
Wrench does not
build up pressure.
Piston seal leaks.
Replace the seals.
Pump does not build
pressure.
Adjust the pressure.
Pump is defective.
Refer to the pump
manual.
Wrench leaks oil.
Seal failure.
Replace the seals.
Wrench operates
backwards.
Hose connections are
reversed.
Reconnect the hoses
properly.
Ratchet returns on
retract stroke.
Hydraulic coupling is
damaged.
Replace the coupling.
Hydraulic coupling is not
connected.
Reconnect the hoses.
and couplings securely.
Worn or damaged
directional control valve
on the hydraulic pump.
Take pump to authorized
service center. Make
repairs as required.
Ratchet does not take
successive strokes.
Worn or broken drive shoe.
Replace the drive shoe.
Broken ratchet lever or
ratchet.
Replace ratchet lever
and/or ratchet (as
required).
Lubricant on the ratchet
and/or drive shoe
splines.
Disassemble the
cassette and remove the
lubricant from splines.
ENGLISH
