COVER-VALVE MECHANISM 1148684 - Caterpillar

Product Support Program For Addressing Early Hour Tubocharger Failure On Certain 3116 Marine Engines
SMCS - 1052 PS8950
March 23, 1997
U-79
A-67
AU-57
B-34
S-35
H-23
O-56
TM-1 This Program can be administered either before or after a failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS8950" as the Part Number and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and use "T" as the SIMS Description Code. If administered after failure, use "96" as the Warranty Claim Description Code and use "Z" as the SIMS Description Code.
Termination Date
March 31, 2000Problem
Early hour turbocharger failure may occur on certain engines equipped with a 1305899 Air Cleaner Mounting Bracket released for use with 1305921 and 1277077 Turbochargers having the four inch diameter compressor inlet hose and the standard air cleaner mounting group.
Affected Product
Model & Identification Number
3116 (4KG3214-5038 1SK1163-1597 (If engine was reworked with 1305899 Air Cleaner Bracket)
4KG5039-63191SK1598-1947(Engines built with 1305899 Bracket)
4KG6320-6466(Engines built with 1434049 Bracket))
The Affected Product includes engines that were originally built with, or retrofitted with, a 1305899Air Cleaner Bracket. It can be identified by the following:- It has four straps that fit inside the air cleaner element to support the air cleaner mounting stud.- The hose from the adapter to the cold housing of the turbocharger has a four inch diameter on BOTH ends. This adapter was intended for use with 1305921 or 1277077 Turbochargers that have the 1305922 cold housing with the four inch inletdiameter. There is a similar bracket on earlier built engines that has a 4.0 to 2.75 inch reducer hose from the adapter to the cold housing that is NOT a problem, and this PSP is not adaptable to those engines.
The affected product also includes engines built with the 1434049 Bracket which is similar to the 1305899 Bracket with the straps removed, but does not have the longer flared inlet tube like the new 1448883/">1448883.
Parts Needed
Air Cleaner Mounting - ( Before or After Failure)
4C4030 Loctite1 - 8N5001 Bolt1 -1S7104 Seal-O-Ring2 - 8T4224 Washer2 - 8T4908 Bolt1 - 7W5040 Element2 - 7X0613 Washer1 - 1163359 Retainer1 - 1434048 Bracket Assembly1 - 1448883 Bracket Assembly On 4KG6320-6466, only the 1448883 Bracket and 7W5040 Element is needed.
PARTS NEEDED CONT.
Turbocharger Replacement - (After Failure Only)
1 - 7C7613 Gasket1 - 9M4849 Seal-O-Ring1 - 4P7704 Gasket1 - 1S7057 Gasket1 - 7W2398 Gasket1 - 0R7212 Turbo GroupAction Required
Before/After Failure
1. Inspect the engine to determine if it has the 1305899 or 1434049 Air Cleaner Mounting Bracket. Engines equipped with AirSep air cleaners do not use this bracket and should NOT be reworked before failure.2. If the engine has the 1305899 or 1434049 Air Cleaner Mounting Bracket, remove the bracket and the air cleaner element.3. Install the new air cleaner mounting group and a new air cleaner element. Engines with the 1434049 Bracket can use the 1448883 Bracket as a direct replacement. Other mounting group parts will already be on the engine.
After Failure Only
If a turbocharger fails on any affected engine,