Maintenance work on the carrier
7.15 Hydraulic system
07.12.2017
Maintenance manual 3 302 649 en 7 - 105
GMK4090
Bleeding the
hydraulic system
If the steering is ”spongy” during the test run, you must bleed the hydraulic
system at the steering cylinders.
preparations – The truck crane is raised on outriggers; à Operating manual.
– The parking brake is engaged.
Bleed the steering cylinders individually,
one after the other
• Start the engine.
• Bleed each steering cylinder (2) by loosen-
ing each of the collar nuts (1) in turn, until
the oil coming out no longer contains air
bubbles.
If the steering system is still not operating
properly
• Notify Manitowoc Crane Care or an author-
ised GROVE dealer or an authorised special-
ist workshop.
G
Risk of crushing from turning wheels
When working between the wheels ensure that the steering wheel cannot
be turned by an unauthorised person. The wheels turn when the steering
wheel is operated.
G
Risk of accidents from high oil pressure
Never undo the hose connections completely. The hydraulic system is
under pressure, even when the steering wheel is not turned.
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