114
Maintenance and Service
Operator's Manual GB
8.6.2
Fault
Probable cause
Action
The stabiliser extensions do
not slide out/in. (Chain-driv-
en stabiliser system)
Incorrect chain tension.
Contact a HIAB service
workshop.
The stabiliser leg cylinder
cannot keep the truck load
and it goes inwards.
Check valve damaged.
Go to a HIAB service work-
shop.
Cylinder internal leakage.
Go to a HIAB service work-
shop.
Soft ground surface.
Set again the stabiliser led
onto the ground or add an
extra support plate between
the cylinder and ground.
Slewing support cylinders
do not turn
Three-way valve failure.
Go to a HIAB service work-
shop.
Irregular slewing move-
ments and unusual noises in
cranes with rack and pinion
slewing system.
Insufficient oil in the hy-
draulic system.
Top up the oil tank.
Insufficient oil in the slew-
ing housing.
Top up the oil in the slew-
ing housing to the required
level.
The upper slewing bearing
is not properly lubricated.
Lubricate the bearing.
The bearings in the slewing
housing are damaged.
Go to a HIAB service work-
shop.
Irregular slewing move-
ments and unusual noises in
cranes with continuous
slewing system.
Insufficient oil in the hy-
draulic system.
Top up the oil tank.
Insufficient oil in the gear
box.
Top up the oil in the gear
box to the required level.
Bearing assemblies and pin-
ion are not properly lubri-
cated.
Lubricate the bearing while
slewing.
Bearing assemblies or pin-
ion are damaged.
Go to a HIAB service work-
shop.
One function of the control-
ler 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 con-
trols. Indicator lamps light
up on the user panel.
The crane is in an OLP
situation.
Perform movements to re-
duce the load moment. If
necessary, release OLP.