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L4478_a
9. Troubleshooting
Fault
Possible Cause
Corrective Action
Ratchet will not turn
(HLP Cassette Assembly only)
Grease or dirt build up in the teeth
of the ratchet and segment pawl
Disassemble the ratchet and clean
the grease or dirt out of the teeth.
Worn or broken teeth on ratchet
and/or segment pawl
Replace any worn or damaged
parts.
Wrench pressure will not build
Piston seal and/or end plug seal
leaking
Replace any defective o-rings.
Retaining screws sheared
Replace any broken screws.
Coupler is defective
Replace any defective couplers.
Piston will not advance
Couplers are not securely attached
to the tool and /or pump
Check the coupler connections
and make certain that they are
connected.
Coupler is defective
Replace any defective couplers.
Defective remote control unit
Replace the button and/or control
pendant.
Dirt in the direction-control valve of
the pump unit
Disassemble the pump and clean
the direction-control valve.
Piston will not retract
Hose connections reversed
Check the advance on the pump is
connected to the advance on the
wrench and the retract on the pump
is connected to the retract on the
wrench.
Retract hose not connected
Connect the retract hose securely.
Retract pin and/or spring broken
Replace the broken pin and/or
spring.
Pressure reading erratic
Defective gauge
Replace the gauge.
Pump will not build up pressure
Defective relief valve
Inspect, adjust or replace the relief
valve.
Air supply too low or air hose too
small
Make certain the air supply and
hose size comply with the pump
manual recommendations.
Electric power source is too low
Make certain the amperage,
voltage and any extension cord
size comply with the pump manual
requirements.
Defective gauge
Replace the gauge.
Low oil level
Check and fill the pump reservoir.
Clogged filter
Inspect, clean and/or replace the
pump filter.
Refer to the Pump Instruction Sheet for troubleshooting required for the pump unit.
Summary of Contents for HMT Series
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