188 678.1 - RHB LEXION 480 2.2.13
Steering
6. Bleeding the steering hydraulic system:
Jack the steering axle up in the centre, so that the
load is off the steered wheels. Start the engine
and bring the oil up to working temperature of
approx. 50 °C in the tank.
Keep the engine at max. no-load speed.
Turn the steering wheel from one end position to
the other several times, thus bleeding the system.
Check the oil level.
7. Check the pressure settings:
Valve block OVP 20 – setting of pressure relief
valve = 150
+10
bar
Double shock valve = 200 bar
ATTENTION!
Check pressures only with the oil at working
temperature (approx. 50° in the tank) and
with the engine running at max. no-load
speed.
Connect the pressure gauge to the test port
(pressure line upstream of steering valve).
Start the engine.
Turn the steering wheel fully and hold it in that
position. Take the pressure reading (Fig. 27).
ATTENTION!
In the neutral position of the steering wheel,
the circulation pressure from the oil at
working temperature and with the engine at
full speed must not exceed approx. 20 bar.
Should the circulation pressure exceed the
permissible limit, the system will overheat.
(Fig. 26, 27)
27
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