TM 5-4310-393-14
c.
Clean cylinder seat in crankcase (Figure 5-36, Item 2) with dry cleaning solvent and dry with low
pressure compressed air. Check that cylinder seat is smooth and flat.
d.
Clean cylinder thoroughly with dry cleaning solvent Dry with low pressure compressed air. Inspect for
warpage, roundness, damage, rust or corrosion. If any of these conditions are found, replace with new cylinder and
piston.
NOTE
For piston replacement instructions, refer to paragraph 5-6.6.
e.
Inspect cylinder for cracks.
f.
Inspect for scoring, glazing, or ridge
on the upper portion of inner surface g Inspect for metal
particles (fretting) on outer surface.
h.
Measure
cylinder
bore
at
(Figure 5-37), levels 1 to 4 of engine centerline axis "A"
and crossline axis "B". A normal or new bore diameter
should be 2.8740 to 2.8744 inches (73 00 to 73.01 mm)
If wear limits for a normal bore cylinder have been
reached. or exceeded, replace cylinder and piston. If
measurements on axis "A" and "B" are different, cylinder
is out of round or has high spots. Replace cylinder and
piston Refer to Table 5-3
FIGURE 5-37. CYLINDER MEASUREMENT POINTS
i.
Check that top and bottom faces of cylinder are smooth and flat If damaged, replace cylinder and
piston.
B.
Replacing/Reinstalling the Cylinder.
CAUTION
If a new cylinder is installed, use a new piston and rings also. If working on more
than one unit at the same time, ensure that if the cylinder is reinstalled, the original
piston is used with it in the same orientation as when removed. Always use a
piston and cylinder as a matched pair.
WARNING
DEATH OR SERIOUS INJURY COULD OCCUR IF FUEL IS NOT HANDLED
CAREFULLY. USE IN A
5-29
