3208 TRUCK ENGINE Caterpillar


Crankshaft

Usage:

Heat gear to install. Do not heat to a temperature of more than 500°F (260°C).

(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.(0.36 mm)

(2) Diameter of bearing surfaces (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 ± 0.015 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 ± 0.015 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 of the crankshaft main bearing surfaces (journals) ... .005 in.(0.13 mm)

NOTE: See RECONDITIONING PROCEDURES for the correct method to check for bent crankshafts.

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