ARMY TM 9-6115 464 34
AIR FORCE TO 35C2-3-445-2
NAVY NAVFAC P-8-624-34
Table 1-1. FITS AND TOLERANCES
Mfg’s Tolerances
Desired Clearance
Maximum
Maximum
Component
Allowable
Allowable
Minimum
Maximum
Minimum
Maximum
Wear
Clearance
CYLINDER BLOCK:
3.7490
3.7510
Cylinder bore dia.
3.7505
3.7515
0.0050
Cylinder bore dia.(Bohn)
0.0005
Cylinder bore out of round
0.0005
0.0030
Cylinder bore taper
3.0665
3.0670
0.0020
Main brg. bore - less brgs.
2.1870
2.1880
Camshaft brg. bore - less brgs.
2.0000
2.0005
Oil pump bore
0.7494
0.7500
Valve tappet bore
0.003
Warpage
0.0005
Milling
CRANKSHAFT:
2.8734
2.8744
Main brg. journal dia.
0.0003
0.0030
Main brg. journal out of round
0.0003
0.0020
Main brg. journal taper
0.0020
0.0015
Main brg. run-out at center
2.3730
2.3740
0.0030
Conn. rod journal dia.
0.0003
0.0020
Conn. rod journal out of round
0.0003
0.0020
Conn. rod journal taper
0.1400
0.1700
0.0015
Fillet radii
0.0009
0.0034
Crankshaft main brg. clearance
0.0050
0.0100
0.0070
Crankshaft thrust clearance
4.3100
4.3150
0.0150
Seal surface dia.- rear
1.8740
1.8750
0.0150
Seal surface dia. - front
0.0150
CONN.ECTING ROD:
7.9980
8.0020
Length - c to c
2.5260
2.5270
Bearing bore - less bearings
0.0010
0.0030
Br to crankshaft clearance
0.0050
0.0120
0.0050
Conn. rod side clearance
0.0200
Piston pin bushing bore - less
1.4370
1.4380
bushing
1.2503
1.2508
Piston pin bushing bore
0.0015
CAMSHAFT:
2.0530
2.0540
Bearing journal dia.
1.6890
1.7250
0.0020
Lobe dia. meter - base to tip
0.0010
0.0100
Journal run-out in vee blocks
0.0015
0.0035
0.0040
Bearing clearance
0.0015
0.0055
0.0060
End thrust
0.0120
Back lash camshaft to crank
0.001
0.003
gear
PISTON:
Clearance in cyl. bore (pull on
5 lb.
8 lb.
1/2 x 0.0050 ribbon) -
Clearance in cyl. bore (pull
on1/2 x 0.005 ribbon bore)
3.7445
3.7455
Piston pin bore
1.2500
1.2502
0.0010
Width of ring groove - top -
Keystone
1/8 nom.
Width of ring groove - 2nd &
3rd comp
0.0975
0.0990
0.0050
Width of ring groove - top -
oil control
0.1880
0.1895
0.0050
Width of ring groove - lower
oil control
0.1880
0.1890
0.0050
PISTON PIN:
Length
3.0350
3.0400
’
Diameter
1.2498
1.2499
0.0020
Clearance in piston
0.0000
0.0005
0.0020
Clearance in connecting rod
0.0005
0.0012
0.0050
1-14 Change 1
