Operation
0520
−
1/A1
Winterthur Gas & Diesel Ltd.
Operation with Exhaust Valve Control Unit Cut Out
1.
General
1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.
Emergency Operation with Exhaust Valve Closed
1
. . . . . . . . . . . . . . . . . . .
2.1
Cut Out the VCU
1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2
Operation with the VCU Cut Out
1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3
Replace the Defective VCU or Hydraulic Pipe
1
. . . . . . . . . . . . . . . . . .
3.
Emergency Operation with Exhaust Valve Open
3
. . . . . . . . . . . . . . . . . . . . .
3.1
Exhaust Valve
−
Stop Operation
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2
Cut In the VCU
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.
General
If there is a defect in an exhaust valve control unit (VCU), on the hydraulic pipes or on
an exhaust valve, you must repair the defective item immediately
.
If this is not possible because the engine must continue to operate, do the procedures
that follow for the related cylinder.
2.
Emergency Operation with Exhaust Valve Closed
2.1
Cut Out the VCU
If the exhaust valve is defective and there is a large difference between the closing or
opening time, cut out the VCU.
The exhaust valve stays closed in the emergency operation that follows:
1) Cut out the injection (see
2) In the remote control, use the parameter Exv. A/M Cmd to manually close the
VCU for the related cylinder (see
paragraph 1 and paragraph 1.1).
3) Disconnect the electrical connections from the rail valve (5) on the related
cylinder (see Fig. 1).
2.2
Operation with the VCU Cut Out
After the procedure in paragraph 2.1 above is completed, the engine can operate
again.
Note: With one or more VCUs cut out, you can operate the engine only at
decreased load. Read and obey the data in
. Also, the exhaust gas
temperature on the cylinders must not be more than the maximum limit of
515
_
C.
Replace the defective VCU or hydraulic pipe as soon as possible (see the
Maintenance Manual 5612
−
1 Servo Oil Rail and 8460
−
1 Hydraulic Pipe for Exhaust
Valve Drive).
2.3
Replace the Defective VCU or Hydraulic Pipe
1) Stop the engine.
2) Set to off the bearing oil pump.
3) Carefully loosen the drain screw (2, see Fig. 1) to release the pressure in the
servo oil rail (1). Make sure that the servo oil rail has no pressure.
4) Loosen the screws (7, see Fig. 2) on the flange (6) to drain the hydraulic pipe (4).
The leakage goes out through the cover (10) into the oil leakage pipe (11).
2014
Operation during Unusual Conditions
Summary of Contents for W-X82
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