66DX40GG1 Cat Pump 4 GPM 4000 PSI 66 Series , Direct Drive , Gas Engine Flange , 1 inch Hollow Shaft , 66DX Compact , High-Speed 3400 RPM , Forged Brass Body

66DX40GG1 Cat Pump 4 GPM 4000 PSI 66 Series , Direct Drive , Gas Engine Flange , 1 inch Hollow Shaft , 66DX Compact , High-Speed 3400 RPM , Forged Brass Body

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CAT Pumps 66DX40GG1 Direct Drive Plunger Pump

The CAT Pumps 66DX40GG1 is a high-performance Triplex Plunger Pump specifically designed for the demanding environment of commercial pressure washing. Engineered for direct attachment to gas engines, this pump features a 1-inch hollow shaft with a generic SAE J609 mounting flange, making it a universal replacement for most 9 to 13 HP engines. It is rated to deliver a powerful 4.0 GPM at 4000 PSI, providing the cleaning impact necessary for stripping paint, cleaning concrete, and industrial wash-down applications.

This "GG1" configuration is typically supplied as a complete pumping system, including a Brass Manifold for durability and corrosion resistance. It comes equipped with a built-in Modular Unloader Valve and a fixed chemical injector, streamlining the installation process by eliminating the need for external plumbing. The pump utilizes solid ceramic plungers and premium NBR seals, ensuring long service life and consistent performance even under the high RPMs (3400 RPM) of direct-drive gas engines.