Maintenance
3425
−
1/A1
Winterthur Gas & Diesel Ltd.
2.
Piston Ring Wear Rate
2.1
Chrome-Ceramic Layer
−
Measure (Piston Installed)
WARNING
Injury Hazard: Before you operate the turning gear, make sure that
no personnel are near the flywheel, or inside the engine.
1) Read the data in the suppler documentation for the tool Permascope MP0
(94356).
2) Calibrate the Permascope MP0 (94356). Use the calibration foils and the top
flank of a spare top piston ring to get a correct setting.
3) Use the turning gear to move the piston almost to BDC (so that you can see the
piston rings).
4) Clean the surface of the piston ring (1,
5) Put the sensor of the Permascope MP0 (94356) against the middle of the piston
ring (1).
6) Record the value on the digital display of the Permascope MP0 (94356).
7) Compare the measured data with the limits given in 0330
−
1 Clearance Table,
. If the recorded data is not in the limits given, you must
do an overhaul of the piston head.
WCH01145
94356
2
1
P3
P5
P7
P1
P9
P5
P1
P9
Fig. 1
Locations to Measure the Thickness of the
Chrome-ceramic Layer on the Piston Ring
Minimum
Recommended
Piston: Wear of Piston Rings and Ring Grooves
2016
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