TM 5-4310-227-15
C.
ances, and maximum allowable wear and toler-
ances, desired clearances, and maximum allow-
ances for the air compressor.
able wear and clearances for the gasoline en-
gine.
Manufacturer's dimensions
and tolerances in inches
Desired clearance
Maximum allowable
wear and
Min.
Max.
Max
clearance
Min.
Cylinder:
___
___
Cylinder bore __________________
2.9995
0.003
3.0005
___
___
___
Cylinder taper _____________________
___
0.0005
___
___
___
Cylinder Out of round ___________
___
0.0005
Crankshaft:
_
_
_
_
_
_
Journal length _____________________
1.126
0.002
1.126
_
_
_
_
_
_
Journal diameter ___________________
1.125
0.002
1.126
___
_
_
_
_
_
_
Journal taper ______________________
___
0.0005
___
_
_
_
_
_
_
Journal out of round ________________
___
0.0005
___
_
_
_
_
_
_
Runout, flywheel end _______________
___
0.007
___
_
_
_
_
_
_
Eng play __________________________
0.001
0.003
(Engine
cold)
___
___
___
___
Journal shoulder fillet radius ____________
0.125
Piston and pin:
___
___
Piston diameter ___________________
2.9960
2.9970
0.0005
Piston pin diameter ________________
___
___
0.7497
0.7500
0.001
Piston rings:
End gap (when fitted in cylinder) ____
___
___
___
0.022
0.012
To groove (total both sides):
___
___
Compression ring ______________
___
0.0035
0.002
Two compression and scraper
___
___
rings _______________________
___
0.0025
0.001
___
___
Oil ring __________________________
___
0.004
0.0025
Spark:
___
___
___
Advance (ahead of top dead center) ___
___
20
ConnectingRodBearing:
___
___
Rod bearing inside diameter _________
1.12670
1.12700
0.003
Rod bearing-to-crankshaft journal
___
___
___
clearance -------------------------
0.0007
0.002
Connecting Rod Sleeve Bearing:
___
___
Inside diameter ____________________
0.75050
0.0005
0.75080
Connecting Rod Bearing:
___
___
End play __________________________
___
0.004
0.010
Valves, Valve Guides, and Valve
Lifters:
___
___
Valve stem diameter _______________
0.3080
0.3090
0.002
___
___
Valve guide inside diameter ________
0.3120
0.3130
0.002
___
___
Lifter diameter ____________________
0.6230
0.002
0.6240
___
___
Lifter clearance in guide _____________
___
0.001
0.0025
Camshaft:
___
___
Camshaft support pin diameter _______
0.4900
0.4905
0.002
___
___
0.4930
0.002
Camshaft and gear inside diameter ____
0.4920
Oil Pump:
___
___
___
Plunger-to-bore ___________________
0.003
0.004
