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 TM 55-1905-221-14-3
6-27.1.
PISTON - MAINTENANCE INSTRUCTION ( Continued)
LOCATION/ITEM
ACTION
REMARKS
INSPECTION (Cont)
8. Piston Pin
If the piston is to be reused,
Bushing
measure the piston pin bushings
and the piston pin. The inside
diameter of a new bushing in
the piston is 1.5025 inches to
1.5030 inches (3.8164 cm to
3.8176 cm), and the outside
diameter of a new piston pin is
1.4996 inches to 1.5000 inches
(3.8090 cm to 3.8100 cm).
The piston pin-to-bushing
clearance with new parts is
.0025 inch to .0034 inch
(0.0064 cm to 0.0086 cm). A
maximum clearance of .010 inch
(0.025 cm) is allowable with
worn parts.
9. Other
Other factors that may contribute
to piston failure include oil
leakage into the air box, oil
pull-over from the air cleaner,
dribbling injectors, combus-
tion blow-by and low oil pressure
(dilution of the lubricating oil).
Do not remove the bushings from the piston. They are not serviced separately.
REASSEMBLY
10. Piston
a. Piston and cylinder liner
fitting.
(1) Measure the piston
skirt diameter length-
wise and crosswise of
the piston pin bore.
Measurements should be
6-428
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