Maintenance work on the carrier
7.12 Suspension
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GMK4090
07.12.2017
7.12.3 Forced lever – checking correct functioning
On suspension struts with forced levers, the forced levers must be checked
for proper functioning when the suspension is switched on and off.
• Start the engine.
• Lower the truck crane to the lowest level with the level adjustment sys-
tem;
à Operating manual.
• Switch off the suspension; à Operating manual.
The suspension struts and the forced levers (1) are brought together.
• Raise the truck crane with the outriggers; à Operating manual.
• Switch on the suspension; à Operating manual.
• Check whether all suspension struts are extended and the forced
levers (1) are slackened.
If the suspension struts are not extended or only partially extended, the
forced lever is faulty.
• Faulty forced levers should be replaced as soon as possible by
Manitowoc Crane Care or an authorised GROVE dealer or your qualified
repair crew.
G
Risk of crushing when releasing the suspension locking system
When the suspension is switched on, the wheels drop down suddenly.
Ensure that nobody is in close proximity to the wheels when you switch on
the suspension.
S
Risk of damage to the tyres
Remove sharp-edged or pointed objects from below the wheels before
switching on the suspension.
In this way you prevent the tyres from bursting or being damaged when the
wheels come down.
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