TM 10-4320-325-14
CAUTION
Piston ring breakage may occur If rings are opened more than necessary when
Installing. Never stretch piston rings more than necessary.
NOTE
The top piston ring will have a '"T" on the top surface. The middle piston ring will
have a "2T on the top surface and the bottom piston ring will have a "1" on the top
surface.
h. Use the piston ring remover tool to install piston rings Install oil ring, 2nd compression ring, and 1st compression
ring in order.
i. Make sure each piston ring gap is 120 degrees.
j. Make sure the piston rings move smoothly.
NOTE
Cylinder walls should have a deglazed and cross-hatched pattern. The surface should be clean and dry.
k.
Apply liberal amount of lubricating oil to the outer surface of the piston and inner surface of the cylinder
l. Align the identification mark DM on the piston head with the mark on the crankcase
m. Install new connecting rod bearing insert (14) into connecting rod (8).
n. Apply oil to the crank pin on the crankshaft.
CAUTION
Connecting rod Is made of a special aluminum alloy.
Avoid damage while
handling. Do not drop or clash against a hard object.
o. Insert the piston and connecting rod assembly into the cylinder using a piston ring compressor, and move the
crankshaft to top dead center The identification mark DM on the piston head should align with the mark on the
cylinder block.
p. Insert connecting rod end cap bearing insert (14) into connecting rod end cap (4).
q. Install the connecting rod cap (4) using bolts (1), washers (3), and nuts (2) Rotate flywheel so piston is at bottom
dead center Tightening torque for connecting rod bolts is 13 0-14 5 ft-lb (190-200 cm-kg)
6-25
