One New Aftermarket Replacement Fuel Primer Pump Fits Caterpillar (Fits CAT) Construction EquipmentThis aftermarket replacement fuel primer pump (also called a fuel priming pump or hand priming pump) allows operators to manually prime the fuel system on Fits Caterpillar diesel-powered equipment after filter changes, fuel line work, or extended downtime. It mounts in the fuel system and is pumped by hand to purge air from the lines before starting the engine.Compatible ModelsFits Caterpillar (Fits CAT) Crawlers / Track-Type Tractors: D5B, D6CFits Caterpillar (Fits CAT) Wheel Loaders / Motor Graders / Other Equipment: 120, 120G, 12E, 12F, 12G, 130G, 140, 225, 235, 816, 815, 980BFits Caterpillar (Fits CAT) Engines: 3106, 3304Replaces Part Number(s):311-9443, 311-9443-A, 3119443, 3119443-A, 9H-2256, 9H-2256-A, 9H2256, 9H2256-ANew aftermarket replacement part - not remanufactured, not used.