Maintenance5612−1/A1
Winterthur Gas & Diesel Ltd.
2/ 11
3. Removal and installa-
tion
1) Make sure that the servo oil rail (3,
Fig. 1) has no pressure.
2) Disconnect the electrical connection
from the pilot valve (1).
3) Replace and install the new pilot valve,
and make sure that O−ring are in the
correct position.
4) Tighten the pilot valve screws (2) at
9 Nm.
5) Connect the electrical connection from
the pilot valve (1).
4. Completion
1) Install the hydraulic pipe, refer to
8460−1, paragraph 4.
2) Put the replaced VCU in its original
package.
3) Close any drain for servo oil rail.
4) Start the service pump.
5) Check for any leakages from the pilot
valve.
6) Stop the service pump.
2021
Exhaust Valve Control Unit − Pilot valve: Removal and installation
Fig. 1
1
2
3
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