WinGD RT-flex50DF, Руководство по обслуживанию, Страница: 332 / 586

Maintenance
3425 − 1/A1
Winterthur Gas & Diesel Ltd.
6/ 9
3.2 Piston Rings − Removal
CAUTION
Damage Hazard: Do not open the piston rings too far. This will
cause damage to the piston rings.
Note: If the same piston rings will be installed again, record their positions.
1) Use the tool (94338, Fig. 4 ) to remove the top, middle and the bottom piston
rings (1). Make sure that you do not damage the chrome-ceramic surface.
2) Clean the piston grooves.
3) Clean piston, piston rings and the grooves in the piston head.
WCH02956
I
1
I - I
I
94338
Fig. 4
3.3 Piston Ring Clearance (Piston Removed)
Note: You can use a calliper gauge, an inside micrometer set (94101, paragraph
3.3.1 ), or a piece of piston ring (paragraph 3.3.2 ) to measure the grooves
in the piston head.
3.3.1 Procedure with Calliper Gauge or Inside Micrometer Set
1) Use the calliper gauge (1, Fig. 5 ) or inside micrometer set (94101) to measure
the height of the groove at point A and point B. Measure the height of the groove
at a minimum of four locations around the circumference of 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 On
Worn Piston Groove
WCH02244
Fig. 5
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 values, refer to
0330 − 1, Piston and Piston Rings .
2016
Piston Rings and Grooves − Rate of Wear Three Piston Rings