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 ... .006 ± .003 in.(0.15 ± 0.08 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)

(3) Diameter of bearing surfaces (journals) for the main bearings [standard, original size] ... 3.4995 ± .0005 in.(88.887 ± 0.013 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 ± .0005 in.(88.633 ± 0.013 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 ± .0005 in.(88.379 ± 0.013 mm)

Minimum permissible diameter (worn) ... 3.4780 in.(88.341 mm)

Bore in main bearing ... 3.5030 ± .0010 in.(88.976 ± 0.025 mm)

Clearance between main bearing and crankshaft bearing surface (journal) ... .0020 to .0050 in.(0.051 to 0.127 mm)

Maximum permissible clearance between main bearing and crankshaft bearing surface (journal) ... .006 in.(0.15 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)

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