WinGD X92 - Piston Rings − Removal; Piston Ring Clearance (Piston Removed)

Maintenance3425−1/A1
Winterthur Gas & Diesel Ltd.
6/ 9
2.2 Piston Rings − Removal
CAUTION
Damage Hazard: Do not open the piston rings too far. This will
cause damage to the piston rings.
1) Use the tool (94338, Fig. 3) to remove the top, middle and bottom piston rings (1).
Make sure that you do not cause damage to the chrome-ceramic surface.
2) If the same piston rings will be installed again, record their positions.
3) Clean the piston ring grooves.
Fig. 3
94338
1
WCH02681
2.3 Piston Ring Clearance (Piston Removed)
Note: You can use a calliper gauge, an inside micrometer set (94101)
(paragraph 2.3.1), or a piece of piston ring (paragraph 2.3.2) to measure
the piston ring grooves.
2.3.1 Procedure with Calliper Gauge or Inside Micrometer Set
1) Use the calliper gauge (1, Fig. 4) or inside micrometer set (94101) to measure the
groove height at point A and point B. You must measure the groove height at a
minimum of four locations around the the piston head.
2) Record the value from the calliper gauge (1) or inside micrometer set (94101).
3) If the clearance at point A or point B is more than the permitted value, you must repair
the piston head.
B
A
Possible Shape of Worn
Area On Piston Groove
WCH02244
Fig. 4
1
Note: If the clearance at point A and, or point B is more than the permitted
value, you must repair the piston head. For the maximum deterioration
values, refer to 0330−1, Piston and Piston Rings.
Piston Rings: Wear of Piston Rings and Ring Grooves
2015