Hydraulic system
Venting proportional valves
RAUCH Landmaschinenfabrik GmbH D-76547 Sinzheim
Customer service hotline: +49 (0)7221 985 250
E-mail: service@rauch.de
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04.11.2014
Chapter 530
Requirements:
- Replacement of a proportional valve
- Spreading disc speed fluctuations despite constant oil supply.
Oil escapes during venting. Please provide suitable means of collection.
Legal regulations for environmental protection must be observed at all times.
During venting, the spreading discs are rotating. Ensure that no persons are
behind the spreader or disassemble the spreading discs.
Preparation:
- Drive via Load Sensing: Start the tractor, slightly increase the engine RPM of the
tractor.
- Drive via constant flow: Start the tractor, slightly increase the engine RPM of the
tractor, activate the control unit.
Venting:
- Remove the plastic caps from the proportional valves.
- Untighten the counter nut in counter-unclockwise direction until the nut is only
slightly attached to the screw.
- Slowly screw in the threaded bolt.
- Completely screw in the threaded bolt, the
spreading discs start to rotate at high speed.
- The escaping oil must be free of bubbles.
- Slowly screw back the threaded bolt and counter
it at the limit stop. Reattach the plastic caps.
- Always vent both valves.
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