Maintenance
3425−1/A1
Winterthur Gas & Diesel Ltd.
3/ 9
1.2 Rate of Deterioration
The deterioration of the chrome-ceramic layer is related to the operation conditions. If
a piston ring that has some deterioration of the chrome-ceramic layer is found (see
Fig. 2), do an overhaul of the unit as soon as possible.
Chrome-ceramic
Layer is Worn
Fig. 2: Chrome-ceramic Layer
With regular procedures to measure the chrome-ceramic layer, you can calculate the
rate of deterioration for each piston ring.
You can continue to use the piston rings if the remaining chrome-ceramic layer is
more than the limits that follow:
D Top piston ring, more than 0.05 mm
D Middle and bottom piston rings, more than 0.02 mm
If the thickness of the chrome-ceramic layer is less than the limits given, you must
replace the applicable piston ring.
Piston Rings: Wear of Piston Rings and Ring Grooves
2015
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