TM 9-2320-272-24-4
5-26. PISTON AND CONNECTING ROD MAINTENANCE (Contd)
d. Assembly
Ensure numbers on pistons, connecting rods, and connecting rod
caps match numbers on the mating cylinders.
Perform step 1 if assembling with new connecting rod.
Install two connecting rod screws (8) on connecting rod (2). Ensure heads of screws (8) are on flat of
1.
connecting rod (2).
2.
Install retaining ring (13) in pin groove of piston (1).
3.
Position connecting rod (2) in piston (1). Ensure connecting rod (2) matches FRONT mark on
piston (1).
Apply clean engine oil to lubricate piston pin (7) and piston pin bore (12).
4.
Install piston pin (7) through piston (1) and connecting rod (2).
5.
Install retaining ring (6) in pin groove of piston (1).
6.
NOTE
Piston rings must be installed on piston with the word TOP or
supplier's mark facing upward.
7.
Install new oil ring (5) in oil ring groove (14).
Using piston ring expander, install new compression ring (4) and new ring (3) on piston (1).
8.
NOTE
Align bearing shell tabs with connecting rod and connecting rod
cap slots when installing.
Install new upper half bearing shell (9) in connecting rod (2).
9.
Install new lower half bearing shell (10) in connecting rod cap (11).
10.
5-170
