Reassembly Of The Air Cleaner Elements; Bleeding The Hydraulic Circuit Of The Hydrostatic Steering; Replacing The Hydrostatic Steering Hoses - Zetor FORTERRA HSX 120 Operator's Manual

Reassembly of the air cleaner elements

When reassembling the air cleaner elements proceed in
the reverse order.
Observe the following points during the element
reassembly:
- Make sure the contact surfaces are clean.
- During the assembly the elements must not get
deformed and after installation they must not vibrate.
- After closing of the cleaner with the lid the whole cleaner
must be perfectly leak-proof.
- After the maintenance of the dry air cleaner ensure
proper functioning of the clogging indicator again.

Bleeding the hydraulic circuit of the hydrostatic steering

1 - Brake the tractor and secure the rear wheels with
wedges against movement.
2 - Use a suitable jack to lift the front axle, support it.
3 - Start the engine and let it run for approx. 1 minute at
idle speed.
4 - With the engine idling, turn the steering wheel several
times to both sides.
5 - At maximum engine speed, turn the steering wheel 3x
alternately slowly and quickly to both sides up to the wheel
limit stops.
6 - Stop the engine and lower the tractor on the front
wheels.

Replacing the hydrostatic steering hoses

The hoses must be replaced after four years from the
production date (the date is indicated on their surface) or
after 3500 hours of work of the tractor or immediately after
discovering signs of their damage (hose sweating, local
buckling, leaks of the working media around the end
pieces and on the hose surface, abrasion of the hose
surface to the metallic reinforcement, damage of the outer
yarn braiding in the case of low-pressure hoses).
In case of a pump failure or after stopping of
the engine the steering capability is maintained, but
the required steering force gets higher. You can drive
the tractor at a reduced speed to the nearest
workshop.
The steering wheel must not be held in the limit
turning angle positions for a long time (the maximum
time is 20 s); otherwise the oil in the hydrostatic
steering circuit is heated up excessively.
MAINTENANCE INSTRUCTIONS
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