TM 5-6115-400-35
Table 1. Engine Repair and Replacement Standards-Continued
Manufacturer'
s
Maximum
Component
dimensions and
Desired
allowable
tolerance in
clearance
wear and
inches
clearance
Min.
Max.
Min.
Max.
Rocker arms
Bore in rocker arm for bushing ......................................
1.3110
1.3120
Rocker arm bushing finished bore ................................
1.2510
1.2515
Fit of rocker arm bushing in rocker arm bore .................
------------
------------
0.0040
0.0065
...................................................................................
tight
Rocker arm shaft-to-bushing clearance ........................
------------
------------
0.0010
0.0025
Rocker arm ratio-1.51:1
Size of orifice in rocker arm shaft (located in
Nos. 3 and 4 rocker arm bracket positions).-
3/32 in.
Camshaft
Number of bearings used-4
I.D. of installed camshaft bearings ................................
2.4980
2.5010
O.D. of camshaft journals .............................................
2.4940
2.4950
Camshaft bearing-to-journal running clearance .............
------------
------------
0.0030
0.0070
O. D. of camshaft bearings ...........................................
2.7500
2.7510
Bore in block for camshaft bearings ..............................
2.7470
2.7480
Fit of camshaft bearing in bore of cylinder block ...........
------------
------------
0.0020
0.0040
...................................................................................
tight
Camshaft front and rear bearing length-1 7/8 in.
Camshaft intermediate bearing length-1 3/8 in.
Camshaft end play ........................................................
------------
------------
0.0030
0.0090
Thrust plate thickness ...................................................
0.3290
0.3310
Valve lifter and valve lifter bracket
Bore in valve lifter bracket for lifter ................................
1.2495
1.2505
O.D. of valve lifter ..........................................................
1.2470
1.2475
Fit of valve lifter in bore of valve lifter bracket ................
------------
------------
0.0020
0.0085
Timing gear train backlash between mating gears
Oil pump driving gear to crankshaft gear .......................
------------
------------
0.0060
0.0140
Camshaft gear to crankshaft gear .................................
------------
------------
0.0030
0.0110
Accessory drive gear to camshaft gear .........................
------------
------------
0.0030
0.0130
Lubricating oil pressure pump
Running clearance between pump driving gear and
pump cover ...............................................................
------------
------------
0.0100
0.0290
Gear-to-pump body radial clearance .............................
------------
------------
0.00225
0.00325
Pump gear side clearance .............................................
------------
------------
0.0050
0.0070
I. D. of gear shaft bushings (finish bore) .......................
0.7495
0.7505
0. D. of pump gear shafts ..............................................
0.7475
0.7480
Pump gear shaft-to-bushing clearance ....................... -
------------
------------
0.0015
0.0030
Water pump
Front bearing
Bearing bore (I.D. for shaft) ......................................
1.1807
1.1811
Shaft diameter (for bearing) ......................................
1.1814
1.1819
Fit-shaft to bearing ................................................
------------
------------
0.0003
0.0012
...................................................................................
tight
Bearing 0. D. .............................................................
2.8341
2.8346
Bore in water pump body (for bearing) ......................
2.8341
2.8351
Fit-bearing 0. D. to body ........................................
------------
------------
0.0010
0.0005
...................................................................................
loose
tight
Rear bearing
Bearing bore (I. D. for shaft) ................................... -
0.9839
0.9843
Shaft diameter (for bearing) ......................................
0.9845
0.9850
Fit-shaft to bearing ................................................
------------
------------
0.002
0.0011
...................................................................................
tight
Bore in water pump body (for bearing) ......................
2.0467
2.0477
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