WÄRTSILÄ PAAE051728, Instruction Manual

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22.3.3 Electro-pneumatic overspeed trip device
22.3.3.1 Maintenance
For maintenance schedule, see chapter 04.
Removal
1 Remove the valve from the injection pump.
2 Remove the piston (2)
by tapping the cylinder (3) against a
piece of wood. If the piston is stuck, press it out by connecting a
grease gun with a suitable adapter to the air supply of the cylinder.
Caution! If compressed air is used, the piston (2) may be ejected with
such a force that it may cause injuries or damages.
Mounting
3 Ensure that there are no sharp corners or dents
on the
piston (2) or in the cylinder (3). Smoothen if necessary. Apply
a suitable grease and take care not to damage the seal ring
when mounting the piston (2).
a) Check of stop position
·
Set the stop lever in the work position and the terminal shaft
lever in the max. fuel position.
·
Press the STOP-button on the engine. (Stop sequence is
activated approximately 1 min.) Note! The starting air
supply should be open.
·
Check that the fuel rack positions is less than 5 mm.
b) Adjustment of stop position
·
The electro-pneumatic overspeed trip device requires no
adjustment.
·
If a fuel rack position of less than 5 mm cannot be obtained,
check for wear.
c) Check of tripping speed
·
See section 22.5.3.
Electro-pneumatic overspeed trip device
3
2
1
1. Fuel rack
2. Piston
3. Cylinder
4. Slide ring
4
Fig 22-2
4016049601
22 Control Mechanism 32-200636-01
22 - 4 WÄRTSILÄ 32