TM 5-3820-233-35/2
Table 1. Engine Repair and Replacement Standards-Continued.
Manufacturer's
Maximum
dimensions and
Desired
allowable
tolerances in inches
clearance
wear and
Components
Minimum
Maximum
Minimum
Maximum
clearance
Camshaft:
Shaft diameter-at bearings
Front and rear
1.4970
1.4975
------
------
------
Center and intermediate
1.4980
1.4985
------
------
------
Shaft diameter-at gear
1.1875
1.1880
------
------
------
Length-thrust bearing end journal
2.8740
2.8760
------
------
------
End thrust
0.0040
0.0120
------
------
0.0180
Thrust washer thickness
0.1200
0.1220
------
------
------
Balance Shaft:
Shaft diameter and bearing
1.4970
1.4975
------
------
------
Shaft diameter at gear
1.1875
1.1880
------
------
------
Length-thrust bearing
2.8740
2.8760
------
------
------
End thrust
0.0040
0.0120
------
------
0.0180
Thrust washer thickness
0.1200
0.1220
------
------
------
Camshaft and Balance Shaft Bearings
Inside diameter:
Front and rear
1.5000
1.5010
------
------
------
Center and intermediate
1.5010
1.5030
------
------
------
Clearance bearings-to-shaft
Front and rear (next to flange)
------
------
0.0025
0.0040
0.0060
Center and intermediate
------
------
0.0025
0.0050
0.0050
Outside diameter of bearings
Front and rear
2.1880
2.1885
------
------
------
Intermediate
2.1840
2.1860
------
------
------
Diameter of block bore
2.1875
2.1885
------
------
------
Clearance-bearings-to-block
Front and rear
------
------
0.001
0.0005
------
Press
Loose
Intermediate
------
------
0.0015
0.0045
------
Camshaft and Balance Shaft Gears
Backlash
0.0030
0.0080
------
------
0.010
Gear inside diameter
1.1865
1.1875
------
------
------
Clearance-gear-to-shaft
------
------
0.0015
0.0000
------
Press
Idler Gear:
Backlash
0.0030
0.0080
------
------
0.010
Preload-Variation on pull 2 lbs.-11 oz.
1/2 lbs.
6 3/4
------
------
1/2-6-
lbs.
3/4 lbs.
Crankshaft Timing Gear:
Backlash
0.0030
0.0080
------
------
0.010
Gear inside diameter
4.7490
4.7500
------
------
------
Clearance-gear-to-crankshaft
------
------
0.001
0.001
------
Press
Loose
Blower Drive Gear:
Backlash
0.0030
0.0080
------
------
0.010
Gear-to-hub-fit
0.0005
0.0010
------
------
------
Press
Loose
Support-to-end plate
0.0005
0.0025
------
------
------
Support bushing inside diameter
1.6260
1.6265
------
------
------
Hub diameter-at bushing
1.6240
1.6250
------
------
------
Hub-to-support bushing clearance
------
------
0.0010
0.0025
0.0050
Hub-to-cam clearance
------
------
0.0020
0.0070
------
End thrust
0.0050
0.0080
------
------
0.0100
1-7
