2011/09/12 Caterpillar

Engine:

C-15 (S/N: EGH1-UP; MBN1-UP; 6NZ1-UP; 9NZ1-UP)

C-16 (S/N: W1A1-UP; 7CZ1-UP)

C-18 (S/N: CJP1-UP; MDP1-UP; MEP1-UP)

C18 (S/N: RRC1-UP; EJG1-UP; DES1-UP)

Generator Set:

3406E GEN SET (S/N: 9NN1-UP; 8AZ1-UP)

3456 GEN SET (S/N: CCB1-UP; EPE1-UP; C1G1-UP; C3G1-UP; C4G1-UP; CAH1-UP; GHJ1-UP; C2T1-UP; CBX1-UP; 9BZ1-UP)

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

C18 GEN SET (S/N: C6C1-UP; G4C1-UP; STD1-UP; DKE1-UP; PEE1-UP; PEJ1-UP; NKK1-UP; CYL1-UP; STM1-UP; DES1-UP; EKW1-UP)

C18 LOCOMOTIVE (S/N: DCT1-UP)

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

C27 GEN SET (S/N: DWB1-UP; STR1-UP)

C32 GEN SET (S/N: SXC1-UP; WDR1-UP)

C32 MAR GS ENG (S/N: RNE1-UP; RNX1-UP)

Industrial Engine:

3406E IND (S/N: 6BR1-UP)

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

C-16 IND (S/N: BFM1-UP)

C15 IND (S/N: JRE1-UP)

C15 INDUSTRIAL (S/N: JAS1-UP)

C18 INDUSTRIAL (S/N: WJH1-UP)

C27 INDUSTRIAL (S/N: TWM1-UP)

C32 INDUSTRIAL (S/N: TLD1-UP)

Marine Engine:

3406E MARINE (S/N: 9WR1-UP)

C15 MARINE (S/N: RLA1-UP)

C18 MARINE (S/N: WKB1-UP; PLE1-UP; CKH1-UP; C1J1-UP; GES1-UP; KJT1-UP; JKX1-UP; NAX1-UP; NAY1-UP)

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

C32 MARINE (S/N: RNC1-UP; RNR1-UP; T3T1-UP; RNY1-UP; RNZ1-UP)

Mobile Hydraulic Power Unit:

365C MHPU (S/N: GSZ1-UP)

385C MHPU (S/N: MSF1-UP)

Petroleum Engine:

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

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

C15 PETROLEUM (S/N: JDK1-UP)

C18 PETROLEUM (S/N: MPE1-UP; WJW1-UP)

C32 PETROLEUM (S/N: B2C1-UP; SMP1-UP)

Petroleum Power Train Package:

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

Power Module:

C18 POWER MODUL (S/N: X6X1-UP)

C32 POWER MODUL (S/N: MED1-UP; MEG1-UP)

Engine News SEBD9554, 25 August 2008, "A New Rocker Arm Assembly is Available". Disregard this article. See the article that follows. The article has been updated with new part numbers and a graphic.

A new rocker arm core is available for the 10R-1365 Rocker Arm As. Refer to Table 1 for acceptable core part numbers.

Table 1

Part Number	Design Configuration
203-8823	Existing Core (Ductile Iron)
259-6121	Existing Core (Forging)
243-2463	New Core (Forging)
271-3962	New Core (Forging)

The new 243-2463 Valve Rocker Arm and the new 271-3962 Valve Rocker Arm are identical to the existing 203-8823 Valve Rocker Arm and the 259-6121 Valve Rocker Arm in form, fit, and function. Also, the forged rocker arm provides a rugged design alternative to the cast rocker arm. The fasteners, pin, and the roller are identical.

The new rocker arms core can be used with the current rocket arm core. The change is adaptable to the serial numbers that are listed above.

Refer to Illustration 1 and Table 2 for the variations of the rocker arms that can be received after the 10R-1365 Rocker Arm As is ordered.

Illustration 1	g02711910

Table 2

Callout	Part Number	Description	Design Configuration
1	170-8660 203-8823	Rocker Arm	Cast arm with bushing
2	170-8660 203-8823	Rocker Arm	Cast arm without bushing
3	243-2463 259-6121 271-3962	Rocker Arm	Forged arm without bushing brake pad machined
4	259-6121 271-3962	Rocker Arm	Forged arm with bushing brake pad machined

Four different variations of rocker arms may be received after ordering 10R-1365 Rocker Arm Assembly. All three are acceptable for use in place of the existing rocker arm assemblies.