Zetor PROXIMA POWER Z90 2012, Operator'S Manual

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175
MAINTENANCE INSTRUCTIONS
E722 E723
BLEEDING THE HYDRAULIC CIRCUIT
OF HYDROSTATIC STEERING
1. Secure the tractor against movement
and lift the front axle.
2. Start the engine and let it run at the
idle speed for approx. 1 minute.
3. Turn the steering wheel to both the
sides at the idle speed of the engine.
4. At the maximum engine speed turn
the wheels with the steering wheel 3
times alternately slowly and quickly to
both the sides up to the limiting stops
of the wheels.
5. Stop the engine.
6. After the end of bleeding check or re-
plenish the oil level to the dipstick
mark. Check all the joints and pipes of
the hydraulic circuit of the hydrostatic
steering for leaks.
7. Lower the tractor on the front wheels.
During all the steps of bleeding of
the hydrostatic steering observe
the oil level in the tank to avoid
aspiration of air to the steering
system.