PRODUCT SUPPORT PROGRAM FOR POSSIBLY REPLACING THE DEF FILL VALVE AND/OR REPLACING THE DEF PURGE VALVE ON CERTAIN RETROFIT SELECTIVE CATALYTIC REDUCTION SYSTEMS, 3512E, AND 3516E MARINE ENGINES, C175-20 LOCOMOTIVE ENGINES, AND C280-16 MARINE ENGINES Caterpillar

PRODUCT SUPPORT PROGRAM FOR POSSIBLY REPLACING THE DEF FILL VALVE AND/OR REPLACING THE DEF PURGE VALVE ON CERTAIN RETROFIT SELECTIVE CATALYTIC REDUCTION SYSTEMS, 3512E, AND 3516E MARINE ENGINES, C175-20 LOCOMOTIVE ENGINES, AND C280-16 MARINE ENGINES

Caterpillar’s obligations under this Service Letter are subject to, and shall not apply in contravention of, the laws, rules, regulations, directives, ordinances, orders, or statutes of the United States, or of any other applicable jurisdiction, without recourse or liability with respect to Caterpillar.

This Program must be administered either before or after failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS45856" as the Part Number and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and "T" as the SIMS Description code. If administered after failure, use "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.

The information supplied in this service letter may not be valid after the termination date of this program. Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.

This Revised Service Letter replaces the 23Apr2018 Service Letter. Changes have been made to the Affected Product, Action Required, and Rework Procedure.

TERMINATION DATE

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