1995/05/01 Caterpillar

Undersize Bearing Cone Available For The Axle Housing Outer Wheel Bearing{4215}

Usage:

784B (5RK) Tractors, 785 (8GB),
785B (6HK),
789 (9ZC),
789B (7EK),
793 (3SJ),
793B (1HL) Off-Highway Trucks

Reference: Service Magazine; February 14, 1994; Page 8; "Improved Wheel Bearing Cone Anti-Rotation System Prevents Wheel Bearing Cones From Rotating On The Axle Housing". Service Magazine; July 8, 1993; Page 3; "Procedure To Prevent Rear Wheel Bearing Cones From Rotating On Axle Housing" for 776B Tractors; 777B, 785 and 789 Trucks.

Reference: "Guidelines For Reusable Parts, SEBF8083-02, Procedure To Repair Worn Wheel Spindle And Hub For Off-Highway Trucks".

Illustration 1. Rear Wheel Group

An undersize outer bearing cone (1) is available for the axle housing (2). The undersize cone provides an alternate means (other than spray metalization) of reconditioning an axle housing that is damaged at the outer bearing assembly position. The undersize bearing cone numbers are included in the chart.

NOTE: The "Guidelines For Reusable Parts, SEBF8083-02, Procedure To Repair Worn Wheel Spindle And Hub for Off Highway Trucks" allows an axle housing wear limits of 0.20 mm (.008 in) for reuse. To check for usability, install a new (standard size) bearing cone on the axle housing bearing journal and measure the clearance between the six o'clock (lowest) position of the bearing cone and journal using a feeler gauge. A clearance of less than 0.20 mm (.008 in) is acceptable. If the clearance is not acceptable, the undersized bearing cone could be utilized. The chart and Illustration 2 provide the diameter of the outer bearing race for the undersized outer bearing.

See Service Magazine, "Procedure To Prevent Rear Wheel Bearing Cones From Rotating On Axle Housing", for information on slot sizes for the "retaining pin" type retaining pin.