Wear Of The 8E-8164 Thrust Disc May Cause Transmission Caterpillar

Problem:

There are four holes for lubrication in the 8E-8165 Planet Shaft that is part of the 8E-8166 Shaft Assembly. The outer two lubrication holes, which have chamfers, provide oil to either side of the 8E-8164 Thrust Discs. The thrust disc may wear the "Inside Diameter " and become loose on the planet shaft. The wear occurs due to a sharp 'burr' on the lubrication hole chamfer.

If the wear becomes extensive, the thrust disc will contact the ring gear, bind and break up into small pieces.

EFFECTED PRODUCT:

The 8E-8166 Shaft Assembly is used in the Off-Highway Trucks that are listed above. The possible effected units are 793C Off-Highway Trucks with the Transmission Serial Number range (4GX960-4GX1001). If failures occur to any transmissions with the serial number prefix of (4GX), send the following information to the address below: transmission serial number, number of hours operated and a photo of the worn 8E-8166 Thrust Disc.

Solution:

Use the following illustration in order to rework the 8E-8165 Planet Shaft. Use a 3M (r) Rol-Loc (extra fine) pad , or equivalent material to remove the burr.

View of 8E-8165 Planet Shaft.

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