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TM 5-2420-222-34
3-11.
PISTON, CONNECTING ROD, AND CONNECTING ROD BEARING MAINTENANCE (Con’t).
d.
ASSEMBLY
NOTE
Perform steps 1 and 2 only if sleeve bushing was removed.
1.
Using arbor press and remover and installer, press sleeve bushing (17) in connecting rod (9). Ensure that oil holes
line up. If sleeve bushing is new, ensure that 1 11/32 - 1 17/32 in. hand reamer can be pushed in sleeve bushing by
hand.
WARNING
Compressed air used for cleaning or drying purposes, or for clearing restrictions,
should never exceed 30 psi (207 kPa). Wear protective clothing (goggles/shield,
gloves, etc.) and use caution to avoid injury to personnel.
2.
Remove any metal particles left by reaming with compressed air.
3.
Position piston (11) in place on connecting rod (9). Coat piston pin (16) with engine oil. Install piston pin in piston and
sleeve bushing (17).
4.
Using retaining ring pliers, install two retaining rings (10) on ends of piston pin (16).
NOTE
Piston compression rings and oil ring come as a set of three. Oil ring Is made up
of two parts; an oil ring and an oil ring expander.
5.
Lubricate oil ring expander (12), oil ring (13), and two compression rings (14 and 15) with engine oil. Using piston ring
expander, install oil ring expander, oil ring, and two compression rings on piston (11) with dots or TOP facing up and
oil ring gaps offset.
6.
Slide upper sleeve bearing half (8) in place on connecting rod (9). Ensure that tang on upper sleeve bearing half fits in
locking groove in connecting rod. Lubricate upper sleeve bearing half with engine oil.
7.
Slide lower sleeve bearing half (4) in place on connecting rod bearing cap (5). Ensure that tang on lower sleeve
bearing half fits in locking groove in connecting rod bearing cap. Lubricate lower sleeve bearing half with engine oil.
e.
INSTALLATION
1.
Using hinged handle and ¾ in. socket, turn crankshaft screw (19) until mating crankshaft journal (3) for desired piston
and connecting rod is accessible.
2.
Lubricate all mating surfaces of piston (11), connecting rod (9), and assembled parts with engine oil.
CAUTION
•
Pistons and connecting rods must be installed in same location from which
they were removed. Failure to do so may damage parts.
•
Do not damage crankshaft journal when Installing piston and connecting rod.
3.
Using piston ring compressor and ball-peen hammer, tap piston (11) and connecting rod (9) in place in cylinder sleeve
(1). Ensure that the word FRONT on piston faces front of engine assembly.
3-74
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