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 (3) Piston ring gap. Measure end gap of
all rings by placing rings in compres-
sor - 10899159 as shown in figure 345.
Mark for replacement all rings that do
not conform to limits specified in re-
pair and rebuild standards (par. 292).
BEARING BORE USING MICROMETER.
in figure 346. Check this measurement
against limits specified in repair and
rebuild standards (par. 292). Remove
connecting rod bolts, cap, and bearing
halves and check the contact surface as
indicated by Prussian blue transfer.
Replace bearings that do not make at
least 75 percent of total contact.
(6) Connecting rod. Check connecting rod
and cap (SS-2 and SS-5) against limits
specified in repair and rebuild standards
for twisted or bent condition using suit-
USING PISTON RING COMPRESSOR -
able checking tools. Inspect piston pin
10899159.
bushing-type bearing bore for confor-
mation to tolerances specified in repair
(4) Piston pin. Inspect piston pin (XX) for
and rebuild standards and for pitting,
wear, c r a c k s , nicks, or scratches.
galling, scoring, or discoloration. Mark
Check diameter of pins against limits
damaged or worn bearing for replace-
specified in repair and rebuild stan-
ment.
dards (par. 292). Replace unserviceable
pins. Replace cracked or unserviceable
piston pin retaining rings.
a . Piston.
(5) Connecting rod bearings. Inspect con-
(1) Replace uny piston (YY) which is cracked
necting rod bearing halves (SS-4) in the
or distorted, or when it shows evidence of
same manner as described in paragraph
flaws in spherical combustion chamber.
Apply a thin coating of Prussian blue
Note. Spherical combustion chamber
to the backs of the connecting rod bear-
lip cracks under 3/4" in length and are
ing halves and install the bearing halves
not cause for replacement.
in their respective connecting rod and
(2) Replace pistons which are not within
cap according to location markings (fig.
limits specified in repair and rebuild
standards (par. 295).
connecting rod bolts to a torque of 800
pound inches. Check bearing inside dia-
(3) Replace pistonswhich are cracked, worn,
meter, using a micrometer, as shown
or abraided in the piston pin bore.
213
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