Rear Crankshaft Seal Leak On Engines With Rear Power Take Off (RPTO) Caterpillar

Rear Crankshaft Seal Leak On Engines With Rear Power Take Off (RPTO)

Usage:

ENGINES3176B (3NL),
3176C (2AW) INDUSTRIAL ENGINES

Problem:

Some of these engines that are equipped with a RPTO may be experiencing oil leaks at the rear crankshaft seal area. Occasionally, the weight of the plate, located on the transmission side of the RPTO housing, can cause a gap between the crankshaft seal and the crankshaft gear journal. If assembled incorrectly, the dust lip of the seal can become crushed on top due to the misalignment of the plate. As a result, an oil leak may develop.

Solution:

Remove the transmission and loosen the bolts that hold the plate in place on the RPTO housing. See the illustration. Align the plate so the gap between the crankshaft seal dust lip and the crankshaft gear is equal. Tighten all of the plate bolts to standard torque. Reinstall the transmission.

NOTE: The "Production Fix" adds dowels to the housing to locate the plate correctly. This fix can also be seen in the Power Connection; Live July 8, 1998; Video Tape; LEVN4438.

LOCATION OF PLATE ON TRANSMISSION SIDE OF RPTO HOUSING

Please share this information with your TEPS Dealers.

COPYRIGHT 1998 CATERPILLAR ALL RIGHTS RESERVED

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