7 CARE AND MAINTENANCE
7.54 MHL360 E
7.7.9 Venting the pilot control
The pilot control must be vented if the pilot
control oil circuit has been opened during
maintenance or repair work. Vent it by loosen-
ing the venting screws (measuring connec-
tions) positioned on the control caps of the
valves on the control block, on the slewing
pump, and on the slewing motor.
7.7.10 Venting the brake
h Carry out maintenance as described in
chapter 7.6.4 Maintenance and inspection
plan.
Collect old oil with a suitable reser-
voir. Do not allow them to seep into
the ground or water! Give to an au-
thorized waste disposal company to
dispose of in an environmentally-
friendly manner.
►
Run the diesel engine at medium speed.
►
Apply the parking brake (302/54).
►
Press and lock the service brake pedal
(302/9).
►
Remove the cap from the ventilation valve
(301/1) and fit a suitable hose.
►
Direct the hose into a container.
►
Loosen the ventilation valve slightly using a
key (W/F 9) and keep it open until hydrau-
lic fluid which is free from bubbles flows in-
to the container.
►
Tighten the ventilation valve and refit the
dust cap.
►
Vent the other three brakes as described.
Fig. 301 Venting the brake
Fig. 302 Venting the brake
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