ARMY TM 9-2815-256-24
AIR FORCE TO 38G1-96-2
MARINE CORPS TM 2815-24/5
Piston and Rod.
Connect piston (7, FIGURE 3-143) to connecting rod (4) as follows:
If a new piston and liner assembly is to be installed, do not remove piston from liner. Push piston
out of liner bottom only far enough to install piston pin.
Lubricate piston pin (6) and piston pin bore with clean engine lubricating oil (MIL-L-2104).
Pistons (7) must be installed on connecting rods (4) from which they were removed.
Assemble pistons (7) and connecting rods (4), making sure word FRONT (A, FIGURE 3-163) on side or top
of piston and side of connecting rod are on same side.
If FRONT is not visible on side or top of piston, install piston on rod so that offset in combustion
bowl of piston is opposite camshaft side of engine. The long side of the connecting rod should face
camshaft side of block.
FIGURE 3-163. Assembled Piston, Pin, and Connecting Rod
Insert piston pin (B) into piston pin bore. Install new piston pin retaining rings (C) with sharp edge of ring
facing away from piston pin. Check to be sure retaining rings are seated in grooves of piston pin bore.
Always refer to manufacturer's specifications for ring identification markings and locations before
installation. Failure to install rings in the proper locations will result in equipment damage.