Terex TW85, Operating Instructions Manual

Page: 99 / 125

Maintenance and care 7
TW85 93
7.9.11 Bleeding the plunger cylinders
•
Pressure supply is via the flushing oil circuit of
the hydrostatic drive.
•
Latching occurs by blocking the connection line
between the plunger cylinders by means of
locking valve, which is activated by the
excavator brake (78/12) or the rocker switch
"pendulum axle locking" (78/62).
•
The axle may not oscillate with excavator brake
engaged or toggle switch for pendulum axle
locking activated.
Bleeding
•
Secure the machine against rolling away.
•
Release excavator brake (78/11)
•
Release the parking brake (78/63).
•
Toggle switch for pendulum axle locking (78/62)
set to “OFF”.
•
Let the engine run at medium speed.
•
Open bleeder screws (79/1) on plunger cylinder
right and left one after another until hydraulic oil
emerges without bubbles.
•
Close bleeder screws.
7.9.12 Hose-rupture safety valves of support
legs
During this test, the machine must be
secured in such a way as to ensure that,
in the event of a defect in the hose-
rupture safety valves, there can be no
danger to persons or objects.
•
Subject the outrigger to be tested to a load
applied in the non-operating direction.
•
Switch off the engine; switch on the ignition.
•
Operate the support leg’s control lever.
The function is correct when the controls do
not move the support leg!
P
HM32-078
62 63
11 12
Fig. 78 Operation
1
HM32-079
Fig. 79 Plunger cylinder