TM 55-2210-224-34
4-8. AIR COMPRESSOR ASSEMBLY (cont)
CLEANING, INSPECTION, AND REPAIR (cont)
45.
Check that oil line (142) is not bent. Replace damaged oil line.
46.
Check that fittings are serviceable.
47.
Clean or replace metallic filter material in breather (28) as required.
48.
Refer to table 4-1 for air compressor data. Measure
parts and check that parts do not exceed condemnable
limits. Replace damaged parts.
Table 4-1. Air Compressor Data
Displacement
153 cfm at 1000 rpm
Compressor bhp (rated speed 140 psi
40 at 1000 rpm
(965.3 kPa))
Ring side clearance (compression)
0.0020 to 0.0040 inch (0.0508 to 0.1016 mm)
Ring gap (oil)
0.004 to 0.014 inch (0.1016 to 0.3556 mm)
Ring side clearance (oil)
0.0020 to 0.0040 inch (0.0508 to 0.1016 mm)
Piston pin to bushing clearance
0.0013 to 0.0020 inch (0.0330 to 0.0508 mm)
Piston pin diameter
1.0082 to 1.0080 inches (25.608 to 25.603 mm)
Piston pin bushing bore diameter
1.0095 to 1.0100 inches (25.6413 to 25.6540 mm)
Insert to crankpin (high and low)
0.001 to 0.003 inch (0.0254 to 0.0763 mm)
Crankpin diameter (high and low)
2.6230 to 2.6225 inches (66.6242 to 66.6115 mm)
Rod side clearance (high and low)
0.010 to 0.025 inch (0.254 to 0.635 mm)
Crankshaft diameter (at main bearing)
2.502 to 2.501 inches (63.550 to 63.5254 mm)
Piston pin to bushing clearance
0.0013 to 0.0020 inch (0.033 to 0.05 mm)
Piston pin diameter
1.0082 to 1.0080 inches (25.608 to 25.603 mm)
Piston pin bushing bore diameter
1.0095 to 1.0100 inches (25.641 to 25.654 mm)
4-23
