MANIFOLD-EXHAUST 7E4238 - Caterpillar

Illustration 1 g00885230Note: After a crankshaft has been reconditioned, the crankshaft must be rehardened. After a nitrocarburised crankshaft has been reconditioned, the nitrocarburised crankshaft must be rehardened. If the crankshaft has been nitrided for at least 60 hours, the crankshaft can be ground undersize 0.25 mm (0.010 inch) without the need to be rehardened. An induction hardened crankshaft does not need to be rehardened after machining. Inspect the crankshaft for cracks before machining and after machining. (1) Crankshaft end play End play of the crankshaft ... 0.05 to 0.38 mm (0.002 to 0.015 inch)Maximum crankshaft end play ... 0.51 mm (0.020 inch) (2) Crankshaft gear Number of teeth on the crankshaft gear ... 28Bore diameter of the crankshaft gear ... 47.625 to 47.650 mm (1.8750 to 1.8760 inch)Maximum permissible temperature of the gear for installation on the crankshaft ... 180 °C (356 °F)Note: The timing mark is toward the outside of the crankshaft when the gear is installed on the crankshaft. (3) Thrust washers Standard thickness ... 2.26 to 2.31 mm (0.089 to 0.091 inch)Oversize thickness ... 2.45 to 2.50 mm (0.096 to 0.098 inch)