Manitowoc Grove GMK 4100L-1 Maintenance Manual page 198

Maintenance work on the carrier
7.15 Hydraulic system
Bleeding the
hydraulic system
Preparations
G
G
7 - 110
•
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;
•
Also check the filling level on the hand pump of the driver's cab tilting
à
device; p. 7 - 2.
If the steering is "spongy" during the test run, you must bleed the hydraulic
system at the steering cylinders.
– The truck crane must be raised on outriggers;
– The parking brake must be applied.
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.
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.
à
Checking the oil level , p. 7 - 97.
Bleed the steering cylinders individually,
one after the other
•
Start the engine.
•
Bleed each steering cylinder (2) by
loosening 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
authorised GROVE dealer or an authorised
specialist workshop.
3 302 364 en
à
Operating Instructions .
or an
Maintenance manual
GMK 4100L-1