Maintenance work on the carrier
7.14 Hydraulic system
7 - 100 3 302 577 en Maintenance manual
GMK7450
16.08.2018
• Start the engine.
• Carry out all hydraulic functions several times to remove any air in the
system.
• Test drive the truck crane, turning the steering wheel several times to its
fullest extent.
• Check the oil level through the sight glass on the hydraulic oil tank. Top
up oil if necessary;
à Check the oil level, P. 7 - 87.
Bleeding the
hydraulic system
If the steeri
ng is “loose” during the test drive, you must bleed the steering
cylinders of the hydraulic system.
Preparations – The truck crane is raised on outriggers;
à Operating manual.
– The parking brake must be applied.
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 ou
t 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 unauthorise
d 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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