Fault
Probable cause
Action
Bearing assemblies
or pinion are
damaged.
Go to a HIAB service
workshop.
One function of the controller does
not work.
One lever of the
controller was not in
neutral at start up.
1. Push in the Stop
button.
2. Make sure that all
levers are in neutral.
3. Release the Stop
button.
Crane does not react to controls.
Indicator lamps light up on the user
panel.
The crane is in an
OLP situation.
Perform movements to
reduce the load moment.
If necessary, release
OLP.
Crane does not work properly:
One or more crane functions do not
work, or not properly.
Lifting capacity is much less than
normal. Operating speed is
significantly reduced.
The service lamp is lit.
The system has
detected a fault.
Contact a HIAB service
workshop.
Cane performance when operating it
with the controller is unsatisfactory.
The pressure reducer
filter is clogged.
Replace the pressure
reducer filter.
Boom system cannot keep the load
height, and it goes down by itself.
Load holding valves
on the first boom or
second boom
damaged.
Go to a HIAB service
workshop.
Cylinder internal
leakage.
Go to a HIAB service
workshop.
Boom extension cylinders do not
follow the sequence.
Cylinder internal
leakage.
Go to a HIAB service
workshop.
Boom extensions shake during
extending/retracting function.
Cylinder internal
leakage.
Go to a HIAB service
workshop.
Sequence screw in
cylinder head loose.
Tight the screw in the
right position.
Boom extensions cannot keep the
load height and they move out by
themselves.
Extension load
holding valve
damaged.
Go to a HIAB service
workshop.
Cylinder internal
leakage.
Go to a HIAB service
workshop.
Maintenance and Service
HIAB K-HiPro 285-425 X4
107