TM-9-2320-273-34
TRUCK TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
DECEMBER 1980
TM-9-2320-273-34 - Page 567 of 801
TM9-2320-273-34
(5)
Check the piston pin outside diameter with micrometer (fig. 14-19). New Pin outside
diameter is 0.6875-0.6876 in. (17.46-17-465 mm); if worn smaller than 0.6872 in. (17.45 mm), the pin
should be replaced.
TA 074375
Figure 14-19. Check Piston Pin for Wear.
(6) Inspect the piston for scoring, cracks, wear, or other damage.
(7) Measure the piston wear at the bottom of the skirt and at a right angle to the piston pin
bore. If the skirt diameter is less than 3.6165 in. (91.860 mm) at 70°F, discard the piston. New skirt
diameter is 3.619-3.620 in. (91.92-91.95 mm).
(8) Measure the piston pin bore at 70°F, with inside micrometer (fig. 14-20). Piston pin bore
on a new piston is 0.6875-0.6880 in. (17.463-17.465 mm); if worn larger than 0.6885 in. (17.488 mm),
replace piston.
TA 074376
Figure
14-20.
Check Piston Pin Bore.
14-20
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