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TM 10-4320-311-14
I.
Check the thrust surfaces on both ends of the connecting rod for damage. Replace connecting rod If
necessary.
m.
Check the contact surface of the crank pin bearing insert for separation, melting, seizure, etc. Replace crank
pin bearing insert if it is separated or damaged.
n
Check that clearance between crank pin and crank pin bearing insert is less than 0 004 inch (0 12 mm)
Replace crankpin bearing insert if clearance exceeds wear limit
INSTALLATION: Refer to Figure 6-19
CAUTION
Connecting rod Is made of a special aluminum alloy. Avoid
damage while handling. Do not drop or clash against a hard
object.
WARNING
Heated parts can result In severe burns. Exercise care In handling
the heated parts.
CAUTION
Avoid direct heating of piston with a torch.
a.
Heat piston (6) to 160-180°F (71-82°C).
b.
Position the piston top identification mark "DM" (13) and the ID number on the connecting rod (9) as shown
c.
Align the small end hole of connecting rod (9) with the piston.
d.
Insert piston pin (8) into the piston pin hole.
e.
Insert two snap lock rings (7) into piston pin holes.
NOTE
Any time piston Is removed from engine, new piston rings should
be Installed.
f.
Measure piston ring end gap of each piston rings (10, 11, and 12).
g.
When inserting the rings, the identification mark should face up.
6-23
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