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 Table 1-1. Torque Limits (Engine, Model 37F16)
Part nomenclature
Ft lbs allowable
Min
Max
Upper base to cylinder stud
(nut end)
1,500
1,550
Cylinder head stud
(nut end)
800
840
Connecting rod bolt
(nut end)
1,020
1,060
Main bearing stud
(nut end)
1,130
1,160
Piston pin cap stud
(nut end)
425
440
Exhaust manifold stud
(nut end)
130
135
Fuel injector stud
(nut end)
100
120
Air start check valve stud
(nut end)
75
85
Table 1-2. Gear Backlash Table (Engine Model 37F16)
Part nomenclature
Backlash
Min
Max
Timing gear train
0.010
0.014
Lubrication oil pump drive gears
0.008
0.010
Lubrication oil pump impellers
0.003
0.005
Water pump drive gear
0.008
0.010
Governor drive gear
0.004
0.006
Table 1-3. Wear Limit Tolerance (Engine Model 37F16)
Part nomenclature
New dimension
Condemnable
Min
Max
deimension
Main bearings:
Sleeve to shaft clearance
0.004
0.006
Sleeve thickness
1.9965
1.9985
Kingsbury bearing
0.050
0.070
0.050 min
Crankshaft:
Crankpin journal
9.998
10.002
Crankpin-out of round
0.004
Crankpin-taper
0.004
Main bearing journal
9.999
10.001
Connecting rod:
Sleeve to shaft
0.003
0 005
Pin sleeve-inner dia
5.500
5.502
5.510
Pin sleeve-outer dia
6.253
6.254
Press fit
Pin diameter
5.493
5.494
5.488
Pin to sleeve clearance
0.006
0.009
0.020
Side clearance
0.018
0.032
0.0625
Piston and cylinder:
Piston diameter
15.983
15.985
Cylinder bore
15.999
16.001
Cylinder-out of round
0.008
Piston to cylinder clearance
0.014
0.018
0.040
Piston pin bore dia Ibracket)
4.999
5.000
Bolted
Piston rings (45angle cut)
Compression ring-gap
0 060
0.085
0.3125
Compression ring side clearance:
Top ring
0.012
0.016
0.025
Others
0.009
0.013
0.022
Scavenge pump
Pump piston dia
37.448
37.452
Pump cylinder bore
37.498
37.502
Pump piston sleeve dia:
Upper
4.983
4.985
4.975
Lower
10.479
10.481
10.465
Pump cylinder sleeve bore
10.502
10.504
10.510
Piston sleeve scraper ring-gap
0.125
0.1875
0.015
Piston sleeve seal ring-side clearance
0.004
0.015
0.025
1-8
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