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74
Maintenance and Service
Operator's Manual GB
9.3
Cleaning
Clean your crane and accessories regularly, but:
• Do not use aggressive cleaning agents.
• Never use a high pressure jet cleaner on
electronic parts, plastic components, signs,
bearings, control valves, cylinders or the oil
tank. Only the cranes surface may be cleaned
with a high-pressure jet cleaner.
Checking the worm gear
To ensure an efficient worm drive, the shaft must
be axially secured.
Place the first boom in horizontal position and
move the boom manually from side to side while
watching the shaft:
• Demount the screws
①
and the cover
②
to
check the play. The worm shaft
③
must not
show any sign of axial movement.
• If the worm shaft
③
must be tightened, the
safety screw
④
must be loosened before the
nut
⑤
can be tightened.
• Tighten the nut to extinguish the play.
Check the worm drive at regular intervals.
Hoist
• At the regular inspection of the crane a test
load has to be lifted near to the ground and
the energy supply of the hoisting hoist has to
be switched off (switch off drive motor).
Checking time approx. 5 minutes. The load
must not sink in this condition. If the load
sinks, stop the operation and have the fault
rectified by a HIAB service workshop.
• Inspect the braking system.