TM 5-3820-239-15
Table 4-1. Repair and Replacement Standards--Continued
Manufacturer's
Maximum
dimensions
and tolerances
allowable wear
and clearance
in inches
Desired clearance
Minimum
Maximum
Component
Minimum
Maximum
--
--
Rotary valve, shaft OD
1.1210
1.1240
0.0030
Sprocket, shaft bore ID
0.0005T
1.2500
1.2505
0.0005
0.0015T
Sprocket shaft, gear surfaces OD
1.2510
1.2515
0.0005T
0.0005
0.0015T
Sprocket shaft, inner bearing OD
1.2610
1.2615
0.0005T
0.0015T
0.0005
Sprocket shaft, outer bearing OD
0.0005T
0.0005
1.1815
1.1820
0.0015T
Thrust bearing ID,
0.9841
0.0008L
0.9843
0.0001L
0.0002
Thrust bearing OD
0.0014L
2.0471
2.0473
0.0002
0.0002L
Upper crank bearing ID
0.7874
0.7878
0.0006T
0.0003L
0.0004
Upper crank bearing OD
1.8504
0.0001T
1.8509
0.0014L
0.0005
Upper throw crank, bearing OD
0.0006T
0.0005
0.7875
0.0003L
0.7880
Worm, shaft bore ID
1.0005
0.0005T
0.0005L
0.0005
1.0000
Worm housing, inner worm wheel
0.0015L
2.8348
2.8360
0.0012
0.0007T
bearing bore ID
Worm housing, outer worm bearing
2.4405
0.0003L
2.4413
0.0015T
0.0008
0.0007T
Worm housing cap, bearing bore ID
2.4425
2.4413
0.0015L
0.0012
1.1820
Worm shaft, inner bearing OD
0.0015T
1.1815
0.0005T
0.0005
0.9850
0.0015T
Worm shaft, outer bearing OD
0.0005T
0.0005
0.9845
1.0008
0.0005T
Worm shaft, worm surface OD
1.0003
0.0005L
0.0005
1.2505
0.0020T
Worm wheel, bore ID
1.2495
0.0005T
0.0010
HYDRAULIC PUMP AIR MOTOR:
0.9847
Front ball bearing ID
0.9843
0.0004
0.0002T
0.0005T
Front ball bearing OD
0.0010T
2.4409
2.4414
0.0005
0.0001L
Front end plate, bore ID
0.0010T
2.4410
2.4404
0.0006
0.0001L
Rear ball bearing ID
0.0002T
0.7874
0.7878
0.0004
0.0005L
Rear ball bearing OD
2.0472
2.0477
0.0012T
0.0005
0.0002T
Rear end plate, bore ID
2.0465
0.0012T
2.0470
0.0005
0.0002T
Rotor, small shaft OD
0.7873
0.7876
0.0002T
0.0003
0.0005L
0.0002T
0.9845
Rotor, large shaft OD
0.9842
0.0003
0.0005L
PROPELLING AIR MOTOR:
3.1507
Motor case, bearing bore ID
3.1497
0.0004T
0.0010
0.0011L
Pin end crank, bearing OD
0.0007T
1.5750
1.5755
0.0005
0.0003L
Pin end crank ball bearing ID
1.5753
1.5748
0.0007T
0.0003L
0.0005
Valve end crank, bearing OD
1.5755
1.5750
0.0007T
0.0005
0.0003L
Valve end crank ball bearing ID
0.0007T
1.5748
0.0003L
0.0005
1.5753
Valve end crank ball bearing OD
3.1496
3.1501
0.0004T
0.0011L
0.0005
TRACTION UNITS:
Bearing retainer bore ID
2.4405
2.4395
0.0005T
0.0010
0.0025T
Complete inner bearing ID
1.3750
1.3755
0.0005T
0.0005
0.0015T
Complete inner bearing OD
2.7180
0.0010
2.7170
0.0025T
0.0005T
2.0005
Complete inner ring gear bearing ID
2.0000
0.0005
0.0001T
0.0009L
Complete inner ring gear bearing OD
3.5000
3.5010
0.0010
0.001T
0.003T
Complete outer bearing ID
1.1250
1.1255
0.0010T
0.0005
0.0020T
Complete outer bearing OD
2.4420
0.0005T
0.0010
2.4410
0.0025T
Complete outer ring gear bearing ID
1.6255
1.6250
0.0010L
0.0005
0.0000T
Complete outer ring gear bearing OD
3.1260
3.1250
0.001T
0.003T
0.0010
Flange and hub assembly ID
2.375
0.001T
0.002
2.373
0.006T
Main drive shaft pinion inner bearing OD 1.3760
1.3765
0.0005T
0.0005
0.0015T
1.1270
Main drive shaft pinion, outer bear-
1.1265
0.0005
0.0010T
0.0020T
ing OD
4-3
