66DX40G1I CAT Pressure Washer Pump 4.0 GPM 4000 PSI Triplex Positive Displacement Plunger , 1-inch Crankshaft Diameter , SAE J609 Gas Flange , Forged Brass Block

Cat Pumps 66DX40G1I Direct Drive Triplex Plunger Pump

The Cat Pumps 66DX40G1I is an industrial-duty, high-performance triplex positive displacement plunger pump designed for direct-drive gas-engine systems. Constructed with a robust, precision-machined forged brass manifold and durable 304 stainless steel valve assemblies, this pump delivers exceptional structural integrity and long-term reliability under high-pressure conditions. It features high-density, polished solid ceramic plungers that provide a true concentric wear surface, minimizing friction and thermal buildup to significantly extend the lifespan of the internal high-pressure seals during continuous commercial use.

Engineered for seamless integration, the 66DX40G1I features a 1-inch hollow shaft with a standard gas flange configuration, allowing it to mount directly to a variety of horizontal gas engines operating at 3400 RPM. This model delivers a precise flow rate of 4.0 GPM at a maximum operating pressure of 4,000 PSI. For enhanced system protection and streamlined installation, it comes factory-equipped with an integral regulating unloader valve and a built-in chemical injector. Utilizing an oil-bath crankcase design for optimal drive-end lubrication and pre-set NBR (Buna-N) seals, this compact, high-pressure pump serves as a reliable, industry-standard component for heavy-duty pressure washing, industrial cleaning, washdown systems, and commercial property maintenance.