INSPECTION (cont) - TM-9-2320-285-24-20226

TM 9-2320-285-24-2

3-25.

AIR COMPRESSOR ASSEMBLY MAINTENANCE

b. Air Compressor Assembly (cont).

STEP

LOCATION

ITEM

ACTION

REMARKS

INSPECTION (cont)

c. Check gap

Install piston with rings in

(cont)

clearance

cylinder bore. Use thickness

gage to check fit. Clearance is

0.002 inch minimum to 0.010

inch maximum. Replace two

piston rings (31) and/or oil rings

(32) if clearances are excessive

NOTE

Repeat steps 9f and 9g above for inspection of remaining piston and associated hardware.

Rear end cover

Inspect

Replace if rear end cover is

(36) with

cracked, broken, or oil

rear crank-

passages blocked, or if

shaft bearing

bearing is excessively worn

or has flat spots

Crankshaft (49)

a. Inspect

Replace if cracked, scored,

or threads damaged

b. Check

Use micrometer. Diameter

journal

should be 1.1242 to 1.1250

diameters

inches. Replace crankshaf t

if excessively scored or

worn out-of-round. If jour-

nal wear or damage is not

excessive, the crankshaft

should be reground for

oversize connecting rod

bearing inserts (24 and

25)

3-220