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TM 5-4320-305-24
4-9. REPLACE/REPAIR CYLINDER ASSEMBLY (Continued)
5 Measure cylinder bore at levels 1 to 4 of
engine centerline axis A and crossline axis
B. Cylinder bore should be 3.9370 to
3.9457 inches (100.0 to 100.22 mm). If
3.9488 to 3.9575 inches (100.3 to 100.52
mm) wear limits have been reached or ex-
ceeded, replace cylinder and/or piston.
6 If measurements on axis A and axis B are
different, cylinder is out-of-round or has
high spots. Replace cylinder and/or piston
as necessary.
7 Check that top joint face (1) and bottom joint face (2)
are smooth and flat. If severely damaged, replace cylinder
(3) and/or piston. If joint faces have only minor nicks or
burrs or minor high spots, repair.
8 Replace a cylinder and/or piston if:
a. It is cracked, severely scored, or has a high ridge at the
top of its inner surface as described in step 3.
b. Out-of-round exceeds the limits described in step 4.
c. Cylinder bore exceeds the limits described in step 4.
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