TM 5-4320-300-14
6-10. PISTONS AND CONNECTING RODS (CONT)
Location/Item
Action
Remarks
39. Connecting
Lubricate piston pin
and
rod and
bushings with clean
piston
MI L-L-2104 oil. Align
piston and connecting
rod piston pin bores.
Insert piston pin and
drive through con-
necting rod. Position
piston pin to install
both piston pin re-
tainers. Position a new
piston pin retainer and
drive it into the piston.
Slide connecting rod
back and forth. Check
for piston pin end
play. If pin is cramped between retainers, remove
retainers and install fresh retainers. Check re-
tainers for seal with a leak detector. To check
seal of retainers, first position detector suction
cup over retainer. Hand operate lever until a
vacuum of 10 inches (25.4 cm) shows on gage.
If gage drops, retainer is leaking. Replace retainer
if necessary.
CAUTION
Piston ring breakage may occur if rings are opened more than necessary
when removing or installing them.
40. Compression
Install bottom compression ring. Install upper
The top compression
rings
compression rings towards the top of the
ring should be in-
piston. Stagger ring gaps around piston.
stalled with the oxide
(rust color) side to-
wards the piston top.
6-88
