HP5535UR Pump & Gearbox Assembly – HP5535 / UDOR Pump, 1″ Shaft

Part Number: HP5535UR
Category: Pressure Washer Pumps & Pump Assemblies
Type: Pump & Gearbox Assembly – HP5535 / UDOR Gear-Drive, 5.5 GPM @ 3500 PSI

The HP5535UR Pump & Gearbox Assembly is a factory-built, gear-driven solution centered around the HP5535 / UDOR triplex pump paired with a 5038.C2 gear reducer for 1″ shaft engines. Delivering 5.5 GPM at 3500 PSI and engineered for 1450 RPM operation, this assembly is designed for commercial and industrial pressure washer systems that demand smooth power transfer, reduced pump wear, and long service life. With a 24 mm pump shaft and heavy-duty construction throughout, it provides a true drop-in upgrade for engine-driven units requiring reliable high-flow performance in continuous-duty environments.

Product Specifications

• Pump Model: HP5535 / UDOR

• Manufacturer: General Pump

• Assembly Type: Complete pump & gearbox assembly

• Pump Type: Triplex Plunger, Gear Drive

• Flow Rate: 5.5 GPM

• Max Pressure: 3500 PSI

• Rated Speed: 1450 RPM

• Engine Shaft Requirement: 1″

• Pump Shaft Size: 24 mm

• Gear Reducer: 5038.C2

• Weight: 42 lb

• MPN: HP5535UR

• Condition: New

Features & Benefits

• Gear-drive system for efficient power transfer and reduced belt maintenance

• High-output 5.5 GPM / 3500 PSI performance

• Designed for engines with 1″ output shafts

• Smooth, low-RPM operation for extended pump life

• Heavy-duty triplex plunger construction

• Ideal for continuous-duty commercial environments

Applications

• Engine-driven commercial pressure washers

• Gear-drive pressure washer systems

• Fleet wash and industrial cleaning equipment

• Equipment repair, refurbishment, and performance upgrades

Important Notes

• Verify engine shaft size (1″), pump shaft size (24 mm), and RPM compatibility (1450) before ordering

• Designed for systems using HP5535 / UDOR gear-drive pumps

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