This Service Manual is for The ONAN RDJC RDJF series engines. This manual deals with specific mechanical and electrical information needed by engine mechanics for troubleshooting, servicing, repairing, or overhauling the engine. Use the table of contents for a quick reference to the separate engine system sections. Use the separate Parts Catalogs available at the dealer level, for parts identification and for establishing their proper location on assemblies. The TROUBLESHOOTlNG GUlDE provides a quick reference for locating and correcting engine trouble. The illustrations and procedures presented in each section apply to the engines listed on the cover. The flywheel end of the engine is the front end, so right and left sides are determined by viewing the engine from the front. The disassembly section contains major overhaul procedures for step by step removal, disassembly, inspection, repair and assembly of the engine components. The wiring diagram shows how the electrical components are interconnected.