2009/03/09 Caterpillar

Generator Set:

C9 (S/N: C9A1-UP; SJB1-UP)

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

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

Marine Engine:

C7 (S/N: M7A1-UP; C7B1-UP; C7D1-UP; M7G1-UP; C7X1-UP; C7Z1-UP)

C9 (S/N: C9B1-UP; CSN1-UP; X9X1-UP; Z9X1-UP; X9Y1-UP)

C-12 (S/N: K1M1-UP; 9HP1-UP)

C12 (S/N: NFL1-UP; C1Z1-UP)

C15 (S/N: RLA1-UP)

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

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

C30 (S/N: CLX1-UP)

C32 (S/N: RXB1-UP; RNC1-UP; RND1-UP; SLT1-UP; T3T1-UP; RNY1-UP)

C7 through C32 Marine Engines with a Plate and Frame Heat Exchanger that is provided by Caterpillar require a minimum of 30 percent mixture of glycol in the coolant. This minimum mixture will prevent cavitation of the cooling system components. A 50 percent mixture of glycol is highly recommended.

Note: Water or water that is mixed with Supplemental Coolant Additive (SCA) are not approved coolants for use with C7 through C32 Marine Engines that are cooled by a heat exchanger. Refer to Operation and Maintenance Manual, SEBU6251, "Caterpillar Commercial Diesel Engine Fluids Recommendations" for additional information.