CARE AND MAINTENANCE 7
MHL380 D 7.59
7.9.7 Venting the hydraulic pump
The hydraulic pump must be vented in order
to work on the pump or if the oil in the hydrau-
lic system needs to be changed.
Loosen the leakage oil hose (209/1) and let the
air escape. As soon as hydraulic oil flows out,
reconnect the leakage oil hose.
Before the pump is restarted after being re-
paired or replaced, the same connection
should be used to fill the pump housing with
hydraulic fluid.
7.9.8 Venting the pilot control
The pilot control must be vented if the pilot
control oil circuit has been opened during
maintenance or repair work.
The pilot control can be vented by loosening
the venting screws (measuring connections)
positioned on the control caps of the valves
on the control block and on the control caps of
the valves on the hydraulic swing gear motor.
Fig. 209 Venting the hydraulic pump