TM 55-2210-223-34
TO 45A2-2-14-22
4-8.
AIR COMPRESSOR (cont)
CLEANING, INSPECTION, AND REPAIR (cont)
47.
Clean, inspect, and repair pistons (90) and (91) by the following:
a.
Use drycleaning solvent and remove dirt, grease, and oil. Dry with compressed air.
b.
Magnaflux pistons (90) and (91) and check that there are no cracks.
NOTE
Check that piston ring grooves are square and do not have ridges.
c.
Use a feeler gage and measure clearance between ring sides and grooves. Clearance is 0.002 to 0.004 inch
(0.05 to 0.10 mm).
d.
Use a micrometer and measure skirts of pistons (90) and (91). Refer to table 4-1 for diameter limits.
CAUTION
Do not use a stone or emery cloth to remove minor scuff marks or scratches from pistons. Damage to
pistons will result.
e.
Use a file and remove minor scuff marks and scratches from pistons (90) and (91).
f.
Replace damaged pistons (90) and (91).
48.
Clean, inspect, and repair connecting, rods (98) by the following:
a.
Use drycleaning solvent and remove dirt, grease, and oil from connecting rods (98). Check that oil passages are
free of obstruction. Dry with compressed air.
b.
Magnaflux connecting rods (98) and check that there are no cracks.
c.
Inspect bolts and nuts and check that threads are not damaged. Check that bolts turn freely on nuts.
d.
Fit connecting rods (98) to crankshaft journals by the following:
(1)
Apply a film of light oil on crankshaft (115) journal.
(2)
Install connecting rod (98) and torque bolts to 125 ± 25 lb-ft (170 ± 34 N.m). Check that castle nut is lined
up to meet-cotter pin hole in bolt.
4-17
