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TM 9-2320-364-34-4
20-186
20-60. PISTON AND CONNECTING ROD REPAIR (CONT).
To prevent damage to oil rings
when piston is installed in ring
compressor, make sure ends of
expander rings do not overlap.
(25)
Lubricate two oil ring expanders (5) with
lubricating oil.
NOTE
Two oil ring expanders are
installed with ends pointing
upward and are positioned 180
degrees apart.
(26)
Install two oil ring expanders (5) on piston
skirt (11).
NOTE
Install oil rings with beveled edge
facing upward.
(27)
Lubricate chrome, nonslotted oil ring (4)
with lubricating oil.
Use care when installing piston rings. Piston rings are under tension and can act as
projectiles when released and could cause severe eye injury.
NOTE
Chrome, non slotted oil ring is installed with gap position 180 degrees from gap in oil ring
expanders installed in Step (26).
(28)
Using piston ring remover and installer, install chrome, non slotted oil ring (4) in piston skirt (11).
(29)
Lubricate nonslotted oil ring (4) with lubricating oil.
NOTE
Nonslotted oil ring is installed with gap positioned 90 degrees from gap in oil ring installed
in Step (28).
(30)
Using piston ring remover and installer, install nonslotted oil ring (4) in piston skirt (11).
(31)
Lubricate oil ring (4) with lubricating oil.
NOTE
Oil ring is installed with black slotted bottom down and gap positioned 180 degrees from
gap in expander ring installed in Step (26).
(32)
Using piston ring remover and installer, install oil ring (4) in piston skirt (11).
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