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BA TH412 * 06/2017 * 4512_7-12_Hydrauliksystem_en.fm
7 Maintenance
Bleeding the hydraulic system
Injury hazard due to uncontrolled movements of the
loader unit!
Air inclusions in the hydraulic system can cause
uncontrolled movements of the loader unit due to
pressure loss.
► Bleed the hydraulic system after replacing the
hydraulic oil, in the event of malfunctions in the
hydraulic system, after repairs or after extended
periods in which the machine and the hydraulic system
are not used.
► Perform bleeding only when seated on the operator
seat.
► Ensure that no one is in the danger zone of the
machine.
1. Check the hydraulic oil level in the hydraulic oil
reservoir.
➥ If necessary, add hydraulic oil until the oil level is
visible in the middle of the inspection window
Fig. 155.
2. Start the engine.
➥ Let the machine run at idling speed a few minutes.
3. Fully extend and retract the piston rods of all hydraulic
cylinders several times.
4. Turn the steering wheel repeatedly to either side until
the steering system works correctly and without any
sounds.
5. Check the hydraulic oil level in the hydraulic oil
reservoir.
➥ If necessary, add hydraulic oil again until the oil
level is visible in the middle of the inspection
window
Fig. 155.
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