Increased Power Train Oil FLow Can Decrease Final Drive Oil Temperature Caterpillar

Problem:

Restriction of lubrication flow from the final drive back into the differential housing causes increased oil temperatures.

Solution:

Final drive oil temperature may be decreased by modifying the drain hole diameter from 13.00 mm (.511 in) to 20.00 mm (.787 in) on the 785, 785B Off-Highway Trucks.

Procedure To Modify Retainer

Refer to the following procedure to modify the retainer. Remove 106-6540 Retainer from 0R-8401, 6G-9345, 8X-9489 or 140-7626 Wheel Group. At (A) sixteen places, increase oil drain hole diameter from 13.00 mm (.511 in) to 20.00 mm (.787 in) on the 785, and 785B Off-Highway Trucks. Refer to Illustration.

NOTE: Refer to the appropriate Disassembly and Assembly Service Manual.

NOTE: It is not recommended to rework 8W-5919 Retainer. Replace 8W-5919 Retainer, located in 0R-8401, 6G-9345 or 8X-9489 Wheel Group, with a modified 106-6540 Retainer.

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