TM 10-4320-310-14
5-12.
INSPECT/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. 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 retaining ring (1) in lip groove of piston (3)
gudgeon bore.
When installing cylinder, make sure piston or
connecting rod does 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 combustion chamber opening (5) 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 installed retaining ring
(1) and stops.
7
Install second new retaining ring (1).
5-33
