2010/08/26 Caterpillar

Engine:

C15 (S/N: ZKA1-UP)

C18 (S/N: ZKB1-UP; EJG1-UP)

Generator Set:

C15 GEN SET (S/N: PEC1-UP; C5E1-UP; STG1-UP; C5H1-UP; C5L1-UP; NKL1-UP; X4R1-UP; CYY1-UP)

C15 PET GS ENG (S/N: PET1-UP)

C18 GEN SET (S/N: C6C1-UP; G4C1-UP; STD1-UP; DKE1-UP; PEJ1-UP; NKK1-UP; STM1-UP; EKW1-UP)

C18 MARINE GS (S/N: CYN1-UP; GEN1-UP; MGS1-UP)

Industrial Engine:

C-15 IND (S/N: BEM1-UP)

C15 IND (S/N: JRE1-UP)

C15 INDUSTRIAL (S/N: JAS1-UP)

C18 INDUSTRIAL (S/N: JDA1-UP; WJH1-UP)

Marine Engine:

C15 MARINE (S/N: RLA1-UP)

C18 MARINE (S/N: WKB1-UP; PLE1-UP; CKH1-UP; C1J1-UP; GES1-UP; KJT1-UP; JKX1-UP)

C18 MARINE ENG (S/N: J2K1-UP; T2P1-UP)

Petroleum Engine:

C-15 PETROLEUM (S/N: Z2C1-UP)

C15 PETROLEUM (S/N: JDK1-UP)

C18 PETROLEUM (S/N: WJW1-UP)

Petroleum Power Train Package:

TH35-C15I (S/N: PBN1-UP)

TH35-C15T (S/N: PBL1-UP)

Description of Change: An improved locknut is now used in order to tighten the exhaust manifold on the engines that are listed above. The improved locknut maintains a more consistent torque on the exhaust manifold and on the cylinder head joint.

Adaptable To:

Illustration 1	g02230295

When replacing the exhaust manifold gaskets use the improved 2N-2766 Locknut (1). The torque for the 2N-2766 Locknut is 50 N·m (37 lb ft).

The improved locknut is adaptable back to the first production of the above listed engines.