GASKET 8F1846 - Caterpillar

Engine 3500 and G3500 EnginesIntroduction
The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.Problem
Dealers are reporting failures of 436-1478 Crankshaft Seal and 436-1479 Crankshaft Seal in certain applications. Failure rates reported to date vary widely between applications.Solution
Caterpillar is aware of this problem, but a permanent repair has not been identified. As an interim corrective action, Dealers who are not experiencing failures of 436-1478 Crankshaft Seal and 436-1479 Crankshaft Seal should continue to use them. Dealers who have seen an uptick in failures with the new seals may wish to use 113-8432 Crankshaft Seal Gp and 113-8433 Crankshaft Seal Gp, which are still available.Refer to disassembly and assembly instructions available in Service Information System (SIS) for replacing the crankshaft seal.Note: 484-7863 Tool As is required for 436-1478 Crankshaft Seal and 436-1479 Crankshaft Seal, and is not compatible with the former seals. If dealers are experiencing failures of these seals, please contact Dealer Solution Network (DSN) to provide details of the failure, and Send it Back information if requested.