CARRIER AS-CLA 2397977 - Caterpillar

Generator SetC175-16 (S/N: WYC1-UP)C175-16 GEN SET (S/N: WYB1-UP)C175-20 (S/N: BXR1-UP)Locomotive EngineC175-16 (S/N: 3A91-UP; Y3A1-UP; KWT1-UP; R1X1-UP)Marine EngineC175-16 (S/N: M6A1-UP; M6B1-UP)Petroleum EngineC175-16 (S/N: P6L1-UP)Description Of Change: A new camshaft and lifter lever has been implemented on C175 machine engines. A polish improvement has been made to the lobes of the camshaft and the surface finish on the inner diameter of the lifter lever roller has been improved.Adaptable To: The changes are adaptable back to first production on the serial numbers listed above. The new and former part numbers are listed below. Table 2 contains the effective serial numbers for the camshaft change. Table 3 contains the effective serial numbers for the lifter change.
Table 1
Description Former Part Number New Part Number
C175–16 Front Camshaft 274-7726 488-3487
C175–16 Rear Camshaft 274-7728 488-3489
C175–20 Front Camshaft 388-8844 488-3491
C175–20 Rear Camshaft 388-8842 488-3493
Lifter Lever 281-9370 486-3590
Table 2
Effective Serial Numbers For Camshaft
(S/N: 3A900137-UP)
(S/N: KWT00135-UP)
(S/N: M6A01013-UP)
(S/N: M6B01011-UP)
(S/N: P6L01115-UP)
(S/N: R1X00114-UP)
(S/N: WYB01893-UP)
(S/N: WYC02006-UP)
(S/N: Y3A00137-UP)
(S/N: BXR01767-UP)
Table 3
Effective Serial Numbers For Lifters
(S/N: 3A900137-UP)
(S/N: KWT00127-UP)
(S/N: M6A01009-UP)
(S/N: M6B01009-UP)
(S/N: P6L01115-UP)
(S/N: R1X00114-UP)
(S/N: WYB01851-UP)
(S/N: WYC02006-UP)
(S/N: Y3A00137-UP)
(S/N: BXR01239-UP)