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TM 10-4320-311-14
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 (10, 11, and 12). 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.
I.
Align the identification mark DM (13) on the piston head with the mark on the crankcase.
m.
Install new connecting rod bearing insert (5) Into connecting rod (9).
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 (5) 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
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