Caterpillar C7 and C9 Fuel Injection Pump 319-0677 476-8766 Optimize the fuel system pressure, hydraulic actuation responsiveness, and combustion metrics of your medium-to-heavy crawler fleet with this premium replacement fuel injection pump group. Engineered specifically to meet the high-pressure demands of Caterpillar HEUI (Hydraulic Electronic Unit Injector) systems, this hydraulic actuation fuel pump prevents system hunting, restores engine power output, and sustains stable fuel economy across demanding excavation, paving, and forestry tasks. Machinery Applications and Fleet Compatibility This high-precision fuel system unit features universal fitment standards designed for direct drop-in replacement across an extensive fleet of earthmoving and industrial platforms. Compatible Caterpillar Excavator Models Medium & Heavy Crawler Excavators: 324D, 324D L, 324D LN, 325D, 325D L, 326D L, 328D LCR, 329D, 329D L, 330D, 330D L, 330D LN, 336D, 336D L, 340D L Wheeled Excavators & Material Handlers: M325D L MH, M325D MH Associated Industrial & Paving Equipment Asphalt Pavers & Bunchers: AP-1000D, AP-1055D, BG-2455D, BG-260D, 573 Wheel Feller Buncher Track Loaders & Tool Carriers: 973C, 973D, IT62H Integrated Toolcarrier, 950H, 962H Wheel Loaders Associated Diesel Engine Series Engine Frameworks: Optimized for Caterpillar Cat C7 ACERT and Cat C9 ACERT 6-cylinder turbocharged diesel engines. Technical Data and Part Cross-References To streamline global inventory mapping and facilitate rapid workshop identification during systematic top-end engine overhauls, this pump group can be fully cross-referenced with the following factory and remanufactured part numbers: Technical Parameter Field Product Metric / Cross-Reference Code Primary Application Group Cat C7 / C9 HEUI Actuation & Fuel Pump System Production Engineering Codes 319-0677, 476-8766, 204-4944, 254-4358, 319-0675, 139-0678, 476-8769 Interchangeable Assembly Codes 319-0674, 254-4357, 304-0678, 3190677, 4768766, 2044944, 2544358 Remanufactured Service Part Numbers 10R-8899, 10R-3145, 10R-8897, 20R-3426, 10R8899, 10R3145, 10R8897 Operational Input Voltage 12 V / 24 V Dependent on Solenoid Valve Configuration Core System Classification 30 LPM Hydraulic Unit Injector Actuation Fuel Pump Assembly Related Fuel Injection and Hydraulic System Spares Sustaining consistent high-pressure oil lines and avoiding premature injector tip wear requires updating auxiliary component kits during a complete pump replacement: HEUI Injectors and Line Assemblies 387-9427 / 3879427: High-efficiency common rail hydraulic electronic unit injectors for C7 engines. 387-9433 / 10R-7224: Premium replacement fuel injector nozzle assemblies for C9 engines. Filtration and Seal Installation Bundles Injection Pump Seal Kits: High-temperature Viton O-rings, replacement drive shaft seals, and structural mounting gaskets. Advanced Efficiency Filters: Primary fuel water separators and secondary oil filters engineered to eliminate micro-particulates before entering the pump reservoir. Key Engineering and Technical Advantages Precision Micro-Machined Plungers: Internal fuel plungers and actuation pistons are built with microscopic tolerances to maintain a constant 30 LPM flow rate and eradicate mid-cycle pressure drops. Induction-Hardened Metallurgy: The pump casing and critical sliding friction zones undergo proprietary thermal treatment to resist cavitation erosion caused by thermal spikes or degraded lubricants. Direct Drop-In Dimensional Matching: Engineered strictly to original factory drive gear splines and mounting flange bolt positions, allowing for smooth timing alignment and lowering vehicle downtime. Related Part Numbers NO P.N. 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