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TM 5-4320-304-14
TM 08922A-14/1
5-12. lNSPECT/REPAIR/REPLACE PISTON (Continued)
ASSEMBLY:
1
If cylinder has been replaced, piston must also be replaced.
Piston rings are marked TOP and should be installed as
marked. Piston ring breakage may occur if rings are opened
more than necessary when removing or installing them. Do
not strain rings.
2
If piston replacement is necessary, piston rings must
also be replaced.
3
Install piston rings with piston ring pliers 612 090 00.
Install oil control ring (1), cast iron compression ring
(2), and chrome compression ring (3) in order. Be
careful not to strain rings by opening them too wide
during installation. Make sure that the piston ring
gaps are equally spaced around the piston 120 degrees
from each other.
4
Install new circlip (1) in lip groove of piston
(3) gudgeon bore.
When installing piston, make sure piston
or connecting rod do not knock against
crankcase. This could result in serious
damage to piston or connecting rod.
5
Insert connecting rod (4) into bottom of piston
(3). Make sure that opening of combustion cham-
ber is on the flywheel side.
6
Insert gudgeon pin (2) into piston (3) gudgeon
bore and through rod bushing of connecting rod
(4). Push in gudgeon pin until it contacts in-
stalled circlip (1) and stops.
7
Install new circlip (5).
5-43
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