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CAT Pumps 66DX40GG1 - 1 Gas FBB, 4GPM, 4000PSI, 3400RPM

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24.50 lbs
Usually Ships in 2 Weeks
Now Only!
This pump includes the mounting flange that goes between the blue crankcase and engine.

Technical Specifications

Bore: 14 millimeter
Stroke: 11.4 millimeter
Shaft Diameter: 1 inch
RPM: 3400
Max Temperature: 140 degrees F
Max GPM: 4
Crankcase Capacity: 18 ounce
Inlet Port: 1/2 inch
Max PSI: 4000

Product Description

66DX Plunger Pump

This direct-drive plunger pump has a brass manifold, 304SS valve assemblies, and solid ceramic plungers. It has a triplex design with three plunger rods. It comes standard with NBR (Buna-N) seals and o-rings. 

Note: this GG model does not include an unloader. This model is popular in the pressure wash industry and pressure washers who like to install their own unloader valve with a bypass hose. If you would like an unloader included with the pump, please see product number PU66DX40G1I. Or you may order product number PU07860 unloader and install it.

Dimensions: 11.73" x 10.51" x 8.15"


  • Maximum flow: 4 GPM
  • Pressure range: 100-4000 PSI
  • 3400 RPM
  • Direct drive

Compatible Parts and Accessories:

  • 6107 crankcase oil
  • 6089 pressure gauge
  • 6011 pulsation dampener
  • 7104, 7203, 7204 inlet filters
  • 990840 flexible inlet hose
  • 990857 flexible discharge hose
  • 34334 oil drain kit
  • 6108 pressure washer pump protector

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