Joab Hookmaster User Manual

51
Fault Tracing the Hook-Lift
Provided below is a simple troubleshooting guide that can help to identify the most common
faults with a hook-lift.
Problem Cause Action
l Noise from pump.
1. Pump draws air.
2. Insufficient oilvolume.
3. The pump is defective.
1. Checkconnections.
2. Adjust the amount of oil.
3. Replace pump.
l Nothing works.
1. Emergencystop has
been activated.
2. Fuse/relay has tripped.
1. Switch off the engine, pullout
the emergencystop button
and restart.
2. Replace fuse/relay.
l Noise from cylinders.
l Jerky hydraulic move-
ment.
l Oil sprays from the
tank.
1. The piston rod is dam-
aged.
2. Air in the hydraulic sys-
tem.
3. Valve or piston fault in
pump.
4. Oil level in the tank too
high or too low.
5. Pump draws air.
6. The tank’s air filter is
blocked.
1. Replace the piston rod.
2. Checkthat the suction line is
sealed.
3. Service or replace the pump.
4. Adjust the oillevel.
5. Service or replace the pump.
6. Replace filter.
l Poor lifting capacity.
1. Insufficient amount of oil
to the pump.
2. Oil pressure too low.
3. Leaking cylinder gas-
kets.
1. Checkthe oil level.
2. Contact JOAB.
3. Replace the cylinder gaskets.
l Controller or levers
jam
1. Chain lock/lever jams.
2. Spring set for air cylinder
broken.
3. Solenoid jams.
1. Remove, lubricate and rein-
stall.
2. Replace spring set.
3. Clean solenoid. Replace it, if
necessary.
Table 12: Fault tracing the hook-lift
Hookmaster manual: 13293 Edition 6 | 2021-02-22

Joab Hookmaster Specifications

General

Brand	Joab
Model	Hookmaster
Category	Lifting Systems
Language	English