TM 5-4320-302-14
6-16.
PISTON ASSEMBLY (CONT)
Location/Item
Action
Remarks
20.
Piston pin
Replace if finish is destroyed or fretting is visible.
21.
Piston rings
Replace.
22.
Piston-to-
Replace piston and/or cylinder if clearance is not
cylinder
within tolerance.
clearance
23.
Cylinder
If worn or damaged, repair or replace in accordance
with paragraph 6-15.
REPAIR
24.
Piston
Remove slight scoring or fretting with P-C-458 crocus
cloth. Reclean and repeat procedure if necessary.
25.
Piston rings
If gap on new compression ring is insufficient, it may
be increased by filing or stoning the ends of the ring.
File or stone both ends of ring so cutting action is
from outer surface to inner surface. This will prevent
any chipping or peeling of chrome plate on ring. The
ends of the ring must remain square with chamfer on
outer edge.
26.
Cylinder
If worn or damaged, repair or replace in accordance
with paragraph 6-15.
REASSEMBLY/REPLACEMENT
CAUTION
Piston ring breakage may occur if rings are opened more than necessary
when removing or installing them. Do not strain rings.
27. Piston rings
Install new expander
and expander
spring in oil control
spring
ring groove.
6-120
