TM 9-2320-260-34-1
11-5. AIR COMPRESSOR REPAIR (Contd)
10.
Inspect front support (1) for scratches, scoring, and breaks. Measure outside diameter of thrust
Support flange(2) in front support(1) for wear. Refer to table 11-4, Air Compressor Wear Limits, for
measurements. Replace front support (1) if scratched, scored, broken, or if thrust support flange (2)
is worn past limits.
11.
Measure inside diameter of crankshaft bore (3). Refer to table 11-4, Air Compressor Wear Limits,
for measurements. Replace front support (1) if crankshaft bore (3) is worn past limits.
Measure thrust bearing (4) for wear. Refer to table 11-4, Air Compressor Wear Limits, for
12.
measurements. Replace thrust bearing (4) if worn past limits.
Inspect support bearing (5) for scoring, wear, or other damage. Replace support bearing (5) if scored,
13.
damaged, or worn past limits. Refer to table 11-4, Air Compressor Wear Limits, for measurements.
Replace support bearing (5) if damaged.
Inspect drive gear (6) for wear, scoring, or damage. Replace drive gear (6) if worn, scored, or
14.
damaged.
Inspect connecting rod bushing (7) for scoring or damage. Replace connecting rod bushing (7) if
15.
scored or damaged.
Inspect connecting rod (9) for cracks, breaks, bends, and wear. Measure piston pin (8) and crank-
16.
shaft (10) bores for wear. Refer to table 11-4, Air Compressor Wear Limits, for measurements.
Replace connecting rod (9) if damaged or worn.
17,
Inspect piston (11) for scoring, cracks, or damage. Measure piston (11) for wear. Refer to table 11-4,
Air Compressor Wear Limits, for measurements. Replace piston (11) if scorn, cracked, damaged, or
worn past limits.
18.
Measure piston pin (12) for wear. Refer to table 11-4, Air Compressor Wear Limits, for measure-
ments. Replace piston pin (12) if worn past limits.
WEAR LIMITS/TOLERANCES
ITEM/POINT OF MEASUREMENT
NO.
MILLIMETERS
INCHES
Front support
1
Thrust support flange - outside diameter
2
32.69
1.287
minimum
47.68
1.877
Crankshaft bore - inside diameter - maximum
3
7.366
0.290
4
Thrust bearing thickness, - minimum
Connecting rod
9
17.50
0.689
Piston pin bore inside diameter - maximum
8
Crankshaft bore w/o bushing (7) -
10
49.15
1.935
inside diameter maximum
Piston
11
91.87
3.617
Skirt diameter - minimum
17.50
0.689
Piston pin bore - maximum
17.45
0.687
12
Piston pin outside diameter minimum
11-18
