TM 9-6115-664-13&P
5-15. CYLINDER, PISTON, AND CRANKSHAFT MAINTENANCE
8.
Inspect piston pin (8) for scoring. Replace piston
pin if scored on outside diameter.
9.
Inspect connecting rod for cracks or other
damage. Replace connecting rod halves as a set
if damaged in any way.
10.
Inspect inner surface of connecting rod bushing
(10) for scoring. Replace bushing if scored (refer
to REPAIR).
11.
Inspect connecting rod bearing halves (4) for
scoring. The bearing halves are manufactured
with a galvanically applied layer on the inside
surface. When the layer is worn through, a shiny
gold-bronze color will be visible. Replace bearing
halves if layer is worn through.
12.
Measure OD of piston pin (8). OD shall be 26.000
to 26.996 mm (1.0244 to 1.0636 in.). Replace
piston pin if beyond limit.
13.
Measure connecting rod dimensions F and G.
Replace connecting rod if any dimension is
beyond limit.
a.
Dimension F = 29.000 to 29.013 mm (1.1426 to
1.1431 in.)
b.
Dimension G = 55.600 to 55.619 mm (2.1906 to
2.1913 in.)
14.
Measure connecting rod bushing dimensions H
and I. Replace bushing if any dimension is
beyond limit.
a.
Dimension H = 29.035 to 29.075 mm (1.1439 to
1.1455 in.)
b.
Dimension I = 1.483 to 1.495 mm (0.0584 to
0.0589 in.)
Figure 5-9. Cylinder, Piston, and Crankshaft
(Sheet 3 of 5)
5-47
