TM 5-3805-280-24-2
Crankshaft, Main Bearings and Flywheel
15
4. Stone the edge of all oil holes in the journal surfaces
45
smooth to provide a radius of approximately 1.50 mm
(0.060 in.).
5. When finished grinding, inspect the crankshaft by the
fluorescent magnetic particle method, or other similar
method to determine if cracks have originated due to
the grinding operation.
6. De-magnetize the crankshaft after inspection.
7. Thoroughly clean the crankshaft and oil passages with
solvent. Dry with compressed air.
RG,15,DT7437 1914NOV972/2
CRANKSHAFT GRINDING SPECIFICATIONS
Bearing Size
Crankshaft Main Journal OD
Crankshaft Rod Journal OD
Standard
79.324--79.350 mm (3.1229--3.1240 in.)
77.800--77.826 mm (3.0629--3.0640 in.)
0.25 mm (0.010 in.) Undersize
79.074--79.100 mm (3.1131--3.1141 in.)
77.550--77.576 mm (3.0531--3.0541 in.)
Main and Connecting Rod Journal Surface Finish (AA) .....................
Lap 0.20 um (8 AA)
Thrust Surface Finish (AA) ..................................................................
Lap 0.40 um (16 AA)
Thrust Bearing Journal Width ..............................................................
38.952--39.028 mm (1.5335--1.5365 in.)
Direction of Crankshaft Rotation (viewed from flywheel end):
Grinding ...............................................................................................
clockwise
Lapping ................................................................................................
counterclockwise
Engine Stroke ......................................................................................
127 mm (5.00 in.)
RG,15,DT7435 1914NOV971/1
13-223