CAT 67PPX39G1I Pressure Washer Pump – 3.9 GPM @ 4200 PSI, 3400 RPM

Part Number: 67PPX39G1I
Category: Pressure Washer Pumps
Type: Gas Direct-Drive Pump – CAT 67PPX39G1I, 3.9 GPM @ 4200 PSI

The CAT 67PPX39G1I Pressure Washer Pump is a high-performance direct-drive pump built for gas-powered pressure washers operating at 3400–3450 RPM. Delivering an impressive 3.9 GPM at up to 4200 PSI, this pump is engineered for demanding residential and light-to-medium commercial applications that require both high flow and extreme pressure. Featuring a 1″ solid shaft and CAT’s proven triplex plunger design, it offers smooth output, long service life, and reliable performance under heavy workloads.

Manufactured by CAT Pumps, this unit is designed for durability, efficiency, and easy replacement in high-speed direct-drive systems.

Product Specifications

• Pump Model: 67PPX39G1I

• Manufacturer: CAT Pumps

• Pump Type: Triplex Plunger, Direct Drive (Gas)

• Flow Rate: 3.9 GPM

• Max Pressure: 4200 PSI

• Rated Speed: 3400–3450 RPM

• Shaft Size: 1″ Solid

• Bore Diameter: 14 mm

• Stroke: 10.3 mm

• Weight: 17 lb

• Condition: New

Features & Benefits

• Genuine CAT Pumps construction for long-term reliability

• High-output 3.9 GPM / 4200 PSI performance

• Designed for high-speed 3400 RPM direct-drive engines

• Triplex plunger design for smooth, low-pulsation operation

• Heavy-duty components for extended service life

• Ideal for powerful gas-powered pressure washer builds

Applications

• Gas-powered pressure washers

• Residential and commercial-grade cleaning equipment

• Replacement pump for compatible direct-drive systems

• Heavy-duty portable pressure washer setups

Important Notes

• Verify shaft size (1″) and engine RPM compatibility (3400–3450) before ordering

• Designed for direct-drive gas engines

• Final operating PSI and GPM depend on engine speed and overall system configuration