LOCK 1B6161 - Caterpillar

Electric Power Generation:
C15 (S/N: LWR1-UP)
C27 (S/N: EGG1-UP; R8W1-UP)
XQ1000 (S/N: NEB1-UP)
Engine:
C15 (S/N: SWE1-UP; N5F1-UP; LDN1-UP; HAZ1-UP; MG21-UP)
C18 (S/N: TNA1-UP; GTB1-UP; GJE1-UP; JLE1-UP; N8F1-UP; EJG1-UP; BDN1-UP; T2R1-UP; ZPS1-UP; GEX1-UP; BE21-UP; BG41-UP)
Generator Set:
C15 (S/N: LNA1-UP; LZA1-UP; T4A1-UP; ZKA1-UP; L8B1-UP; PEC1-UP; C5E1-UP; STG1-UP; C5H1-UP; LXJ1-UP; C5L1-UP; NKL1-UP; X5M1-UP; NAP1-UP; X4R1-UP; MBS1-UP; SNW1-UP; CYY1-UP; AR21-UP; GB31-UP)
C18 (S/N: LNB1-UP; LZB1-UP; C6C1-UP; G4C1-UP; N1C1-UP; L8D1-UP; N1D1-UP; STD1-UP; DKE1-UP; PEE1-UP; PEJ1-UP; LXK1-UP; NKK1-UP; STM1-UP; M1P1-UP; DDS1-UP; EKW1-UP; NAW1-UP; M1Y1-UP; M1Z1-UP; AR31-UP)
C18 (S/N: EWS1-UP)
C18 (S/N: GBM1-UP; CYN1-UP; GEN1-UP; MGS1-UP)
C27 (S/N: DWB1-UP; N1B1-UP; GDS1-UP; T4Z1-UP)
C32 (S/N: PHT1-UP)
C32 (S/N: K7C1-UP; NRC1-UP; SXC1-UP; JSJ1-UP; WDR1-UP; JAZ1-UP)
C32 (S/N: RNE1-UP; RNX1-UP)
Industrial Engine:
C15 (S/N: BEM1-UP)
C16 (S/N: BFM1-UP)
C15 (S/N: JRE1-UP; MCW1-UP)
C15 (S/N: JKG1-UP; JAS1-UP)
C18 (S/N: JDA1-UP; NBB1-UP; WJB1-UP; WJH1-UP; WRH1-UP)
C27 (S/N: AT41-UP)
C27 (S/N: RAM1-UP; TWM1-UP)
C32 (S/N: TLD1-UP; NST1-UP)
Locomotive Engine:
C27 (S/N: WJC1-UP)
Marine Engine:
C15 (S/N: RLA1-UP)
C18 (S/N: WKB1-UP; PLE1-UP; CKH1-UP; C1J1-UP; JHL1-UP; DTP1-UP; GES1-UP; KJT1-UP; JKX1-UP; NAX1-UP; NAY1-UP)
C18 (S/N: J2K1-UP; T2P1-UP)
C32 (S/N: RNC1-UP; RSD1-UP; RPM1-UP; SDN1-UP; RNR1-UP; T3T1-UP; RNY1-UP; RNZ1-UP)
C32 (S/N: RNF1-UP; DSJ1-UP; RTK1-UP)
Petroleum Engine:
C15 (S/N: Z2C1-UP)
C15 (S/N: PET1-UP)
C15 (S/N: JDK1-UP; JDY1-UP)
C18 (S/N: WJW1-UP; WJY1-UP)
C27 (S/N: NAR1-UP)
C32 (S/N: B2C1-UP; SDK1-UP; SMP1-UP)
Petroleum Power Train Package:
C15 (S/N: 1151-UP)
C15 (S/N: PGN1-UP)
C18 (S/N: 1881-UP)
C32 (S/N: 1321-UP)
C32 (S/N: PEF1-UP; PEK1-UP)
CX31-P600-C15I (S/N: PDM1-UP)
CX31-P600-C18I (S/N: PDC1-UP)
CX35-P800-C18I (S/N: PCF1-UP; PCZ1-UP)
CX35-P800-C27I (S/N: PCY1-UP)
TH35-C15I (S/N: PBN1-UP)
TH35-C15T (S/N: PBL1-UP)
TH48-E70-C27I (S/N: PKZ1-UP)
TH48-E70-C32I (S/N: PKY1-UP)
TH48-E70-C32P (S/N: PKG1-UP)
Power Module:
C32 (S/N: MED1-UP; KNM1-UP)
Engine News SEBD9984, 25 March 2015, "Updated Torque Requirements for Reman Rocker Arm Adjusting Screw Lock Nuts on Certain C15, C16, C18, C27, and C32 Engines ". Disregard this previous article. The article that follows has updated part numbers.Certain remanufactured rocker arms are shipped with larger diameter adjusting screws and lock nuts. Increased torque is required on the larger diameter lock nuts to maintain preload in the adjusting screw.Note: Depending on core return part numbers, not all rocker arms for an affected Reman part number are built with the larger diameter adjusting screw.The torque specifications for the original adjusting screws and lock nuts are listed in Table 1.
Table 1
Rocker Arm Reman Part Number    Original Screw Part Number    Screw Diameter    Lock Nut Torque    
20R-3317     274-4491    
9.525 mm (0.375 inch)    
30 7 N m (22 5 lb ft)    
20R-3328     274-4491    
9.525 mm (0.375 inch)    
30 7 N m (22 5 lb ft)    The torque specifications for the new adjusting screws and lock nuts are listed in Table 2.
Table 2
Rocker Arm Reman Part Number    New Screw Part Number    Screw Diameter    Lock Nut Torque    
20R-3317     335-7395    
11.125 mm (0.438 inch)    
35 7 N m (26 5 lb ft)    
20R-3328     335-7395    
11.125 mm (0.438 inch)    
35 7 N m (26 5 lb ft)