TM 55-2210-224-34
Table 4-1. Air Compressor Data (continued)
High-pressure cylinder:
Cylinder bore
4.249 to 4.250 inches (107.924 to 107.950 mm)
Piston ring land diameter
4.2295 to 4.2245 inches (107.429 to 107.302 mm)
Piston to cylinder clearance
0.0195 to 0.0255 inch (0.4953 to 0.6477 mm) (at ring land)
Piston skirt diameter
4.2475 to 4.2465 inches (107.886 to 107.861 mm)
Piston to cylinder clearance
0.0015 to 0.0035 inch (0.0381 to 0.0889 mm) (at skirt)
Ring gap (compression)
0.004 to 0.014 inch (0.1016 to 0.3556 mm)
Low-pressure cylinder: Cylinder bore diameter 7.499 to 7.500 inches (190.474 to 190.500 mm)
Piston ring land diameter 7
.471 to 7.466 inches (189.763to 189.636 mm)
Piston to cylinder clearance
0.028 to 0.034 inches (0.711 to 0.863 mm) (at ring land)
Piston skirt diameter
7.489 to 7.488 inches (190.220 to 190.195 mm)
Piston to cylinder clearance
0.010 to 0.012 inch (0.254 to 0.304 mm) (at skirt)
Ring gap (compression)
0.008 to 0.028 inch (0.203 to 0.711 mm)
Ring side clearance (compression)
0.002 to 0.0045 inch (0.05 to 0.114 mm)
Ring gap (oil)
0.008 to 0.028 inch (0.203 to 0.711 mm)
Ring side clearance (oil)
0.0021 to 0.0045 inch (0.053 to 0.114 mm)
Main bearing inside diameter
2.5000 to 2.5002 inches (63.500 to 63.505 mm)
Housing bore (main bearing) diameter
4.998 to 4.999 inches (126.9492 to 126.9746 mm)
Main bearing outside diameter
5.001 to 5.000 inches (127.0254 to 127.0000 mm)
Main bearing end clearance
0.003 to 0.004 inch (0.07620 to 0.1016 mm)
Connecting rod piston pin bore
1.010 to 1.008 inches (25.6540
to diameter (high and low)
25.6032 mm)
Connecting rod crankpin insert bore
2.750 to 2.749 inches (69.8500
to diameter (high and low)
69.8246 mm)
4-24