TM 5-4310-276-14
dards. Table 1-2 lists the manufacturer's sizes, tol-
Model 311TV.
e r a n c e s , desired clearances and maximum allowable
NOTE
The manufacturer's dimensions and tolerances are given in inches and centimeters. Centimeter are en-
closed in parentheses.
Table 1-2. Compressor Repair and Replacement Standards
Mfr's
Desired
Maximum allowable
dimensions
clearance
wear and
and tolerances
in inches
clearance
in inches
(cm)
in inches (cm)
(cm)
Components
Denotes replacement
necessary if Mfr's
tolerances are
Minimum Maximum
Minimum Maximum
Cylinders:
3.0000
0.0060
Bore, low pressure
0.0045
3.0010
3.0030
(7.6200) (7.6230)
(0.0114) (0.0150)
(7.6280)
0.0022
Bore, high pressure
1.5000
1.5008
0.0009
1.5028
(3.8100) (3.8120)
(0.0023) (0.0056)
(3.8171)
Bores, out-of-round
0.0010
(0.0030)
Crankshaft:
0.0019
0.8746
0.0011
Journal (rod) size
0.8750
0.8736
(2.2215) (2.2225)
(0.0028) (0.0048)
(2.2189)
Taper
0.0010
(0.0030)
Out of round
0.0010
(0.003)
0.0020
End play
0.0020
0.0000
(0.0050)
(0.0050)
Piston to Cylinder:
2.9950
2.9955
0.0060
0.0045
Low, pressure, skirt
2.9930
(7.6073) (7.6086)
(0.0150)
(0.0114)
(7.6020)
1.4986
0.0022
0.0009
1.4991
High pressure, skirt
1.4966
(3.8064) (3.8077)
(0.0023)
(0.0056)
(3.8014)
Piston Ring Gap:
Low pressure
0.0100
0.0150
0.0150
0.0100
0.0250
(0.0254) (0.0381)
(0.0381)
(0.0254)
(0.0635)
High pressure
0.0070
0.0120
0.0120
0.0070
0.0220
(0.0180) (0.0305)
(0.0305)
(0.0180)
(0.0559)
Piston Pin in Rod:
Low pressure
0.5001
0.0015
0.0005
0.5003
0.4999
(1.2703) (1.2708)
(0.0038)
(0.0013)
(1.2697)
High pressure
0.5001
0.0005
0.5003
0.0015
0.4999
(0.0038)
(1.2703) (1.2708)
(0.0013)
(1.2697)
Piston Pin Boss:
Low pressure
0.0000
0.4995
0.5000
0.0000
0.5002
(1.2687) (1.2700)
(1.2705)
High pressure
0.4995
0.0000
0.0000
0.5000
0.5002
(1.2687) (1.2700)
(1.2705)
Connecting Rod Bore:
Piston pin end
0.0015
0.5005
0.5010
0.0005
0.5012
(1.2713) (1.2725)
(0.0013) (0.0038)
(1.2730)
0.8761
0.0019
0.8765
0.0011
0.8767
(2.2253) (2.2263)
(2.2268)
(0.0028) (0.0048)
1-10