Manitowoc Grove GMK 5200-1, Maintenance Manual

Page: 186 / 346

Maintenance work on the carrier
7.15 Hydraulic system
7 - 114 3 302 746 en Maintenance manual
GMK5200-1
0
9
.0
3.
201
8
•
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 inspection glass on the hydraulic oil tank.
Top up oil, if necessary;
à
Checking the oil level
, p. 7 - 101.
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 must be raised on outriggers;
à
Operating manual .
– The parking brake must be 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.