TM 5-4310-344-34
2-4.
TABLE 2-1. TABLE OF LIMITS
Item
Original
Wear
dimensions
limit
First Stage Cylinder and Piston Assembly
Ring to cylinder wall clearance .................................................................. 0.0003
to
0.0005
0.0005
Wrist pin hole............................................................................................ 0.3754
to
0.3756
0.0005
Wrist pin diameter..................................................................................... 0.3751
to
0.3756
0.0005
Piston head clearance................................................................................. 0.021
to
0.026
Second Stage Cylinder and Piston Assembly
Ring to cylinder wall clearance .................................................................. 0.0002
to
0.0004
0.0005
Wrist pin hole............................................................................................ 0.4366
to
0.4368
0.0003
Wrist pin diameter..................................................................................... 0.4364
to
0.4365
0.0005
Piston head clearance............................................................................... 0.0002
to
0.0006
Poppet lift (nominal).................................................................................... 0.022
Exhaust valve lift ........................................................................................ 0.024
to 0.030
Third Stage Cylinder and Piston Assembly
Ring to cylinder wall clearance .................................................................0.00020
to
0.00025
0.0002
Wrist pin hole............................................................................................ 0.4366
to
0.4368
0.0003
Wrist pin diameter..................................................................................... 0.4363
to
0.4365
0.0005
Piston head clearance................................................................................. 0.002
to
0.006
Poppet lift (nominal).................................................................................... 0.034
Exhaust valve lift ........................................................................................ 0.024
to 0.030
Compressor Connecting Links and Master Rod
Connecting link wrist pin bearing hole ....................................................... 0.5615
to 0.5620
0.0005
Master rod connecting link hole................................................................. 0.4366
to 0.4368
0.0003
First stage wrist pin bearing hole ............................................................... 0.5590
to 0.5594
Endbell
Shaft seal bore diameter ............................................................................. 1.499
to 1.500
Bearing bore diameter .............................................................................. 1.8502
to 1.8505
0.0002
Compressor Shaft
Shaft seal diameter (fan end) ...................................................................... 0.934
to
0.940
0.001
Bearing diameter (fan end) ....................................................................... 0.9842
to
0.9845
0.0001
Master rod journal diameter ...................................................................... 1.7711
to
1.7717
0.0005
Bearing diameter (opposite fan end) ......................................................... 1.1809
to
1.1811
0.0001
Shaft seal diameter (opposite fan end)........................................................ 1.059
to
1.065
0.001
Oil Pump Piston
Large spherical diameter........................................................................... 0.5595
to 0.5605
0.0005
Small spherical diameter........................................................................... 0.3790
to 0.3795
0.0005
Oil Pump Cylinder
Inner diameter ............................................................................................ 0.360
to 0.362
0.002
2-2
