Cat Pumps 67DX39G1I Triplex Pump (With Unloader) – 3.9 GPM @ 4000 PSI, 1" Gas FBB Shaft

Part Number: 67DX39G1I
Category: Pressure Washing & High-Pressure Pump Systems
Type: Cat Pumps 67DX39G1I Triplex Pump – 3.9 GPM @ 4000 PSI, 3450 RPM, 1" Gas FBB Shaft (Includes Unloader)

The Cat Pumps 67DX39G1I is a high-performance direct-drive triplex pump engineered for demanding contractor and commercial-grade pressure washer systems. Producing an impressive 3.9 GPM at 4000 PSI, this pump delivers both high flow and high pressure—ideal for heavy-duty cleaning, surface prep, fleet washing, and professional exterior maintenance.

Product Specifications

• Model: 67DX39G1I

• Type: Triplex Pressure Washer Pump

• Flow Rate: 3.9 GPM

• Max Pressure: 4000 PSI

• Operating Speed: 3450 RPM

• Shaft: 1" Gas FBB (Direct Drive)

• Bore Diameter: 14mm

• Stroke: 10.3mm

• Weight: 17.5 lbs

• Includes: Unloader Valve

• Condition: New

Features & Benefits

• High-output 3.9 GPM flow for faster cleaning and wider coverage

• 4000 PSI capability for heavy-duty and commercial applications

• Triplex plunger design for smoother operation and longer pump life

• 1" FBB shaft for direct-drive gas engine mounting

• Operates at 3450 RPM for compact, powerful builds

• Pre-installed unloader simplifies setup

• Far more durable and serviceable than axial-style pumps

• Ideal for contractors, mobile wash rigs, and professional pressure washers