TM 5-3805-260-24
CRANKSHAFT.
Heat gear to Install Do not heat to a temperature of more
than 500F (260C)
(1)
End play for the crankshaft. .003 to .010 in. (0.08
to 0.25 mm)
Maximum permissible end play for
the crankshaft. (worn).......... .014 in. 10.36 mm)
(2)
Diameter of bearing surface (journals)
for the connecting rods standard, original
size] ..... 2.7496 ± .0006 in. (69.840 ± 0.015 mm)
Minimum permissible diameter
(worn) ............................. 2.7486 in. (69.814 mm)
Diameter of bearing surfaces (journals) for the
connecting rods .010 in. 0.25 mm) smaller than
the original size]........2.7396 ± 0006 in. (69.586 ±
0015 mm)
Minimum permissible diameter
(worn) ............................. 2.7386 in. (69.560 mm)
Diameter of bearing surfaces (journals) for the
connecting rods [.020 in. (0.51 mm) smaller than
the original size].......2.7296 ± .0006 in. (69.332 ±
.0015 mm)
Minimum permissible diameter
(worn) ............................. 2.7286 in. (69.306 mm)
Diameter of bearing surfaces (journals) for the
connecting rods [.050 in (1.27 mm) smaller than
the original size]........2.6996 ± 0006 in. (68.570 ±
0.015 mm)
Minimum permissible diameter
(worn) ............................. 2.6986 in. (68.544 mm)
(3)
Diameter of bearing surfaces (journals) for the
main bearings [standard, original
size]........3.4995 ± .0006 in (88.887 ± 0.015 mm)
Minimum permissible diameter
(worn)...............................3.4980 in (88.749 mm)
Diameter of bearing surfaces (journals) for the
main bearings .010 in (0.25 mm) smaller than the
original size] .. 3.4895 ± .0006 in. (88.633 ± 0.015
mm)
Minimum permissible diameter
(worn)..............................3.4880 in. (88.595 mm)
Diameter of bearing surfaces (journals) for the
main bearings [.020 in (0.51 mm) smaller than
the original size] ...... 3.4795 ± .0006 in. (88.379 ±
0.015 mm)
Minimum permissible diameter
(worn)..............................3.4780 in. (88.341 mm)
Diameter of bearing surfaces (journals) for the
main bearings [.050 in. (1.27 mm) smaller than
the original size] .......3.4495 ± .0006 In (87.617 ±
0.015 mm)
Minimum permissible diameter
(worn)..............................3.4480 in. (87.579 mm)
Maximum permissible run out (axial eccentricity)
of the crankshaft., measured at the center main
bearing surface (journal) ...... .008 in. (0.20 mm)
Maximum permissible run out (axial eccentricity)
of the crankshaft., measured at No 2 and No 4 main
bearing surfaces (journal) .... .004 in. (0.10 mm)
1-25
