SLPHP4040UR-402 Pump & Gearbox Assembly – HP4040 Pump w/ Plumbing, VRT Unloader

Part Number: SLPHP4040UR-402
Category: Pressure Washer Pumps & Pump Assemblies
Type: Pump & Gearbox Assembly w/ Plumbing – HP4040 Gear-Drive, 4.0 GPM @ 4000 PSI

The Pressure-Pro SLPHP4040UR-402 Pump & Gearbox Assembly is a factory-built, fully plumbed replacement centered around the HP4040 pump paired with a 5038.C2 gear reducer. Delivering 4.0 GPM at 4000 PSI and engineered for 1450 RPM operation, this gear-drive assembly is designed for engine-driven pressure washer systems that require smooth power transfer, reduced pump wear, and long service life. Supplied complete with plumbing and a VRT3-310EZ unloader, it provides a true drop-in solution for restoring OEM performance in demanding commercial environments.

Image shown may differ from the actual product.

Product Specifications

• Pump Model: HP4040

• Manufacturer: HP

• Assembly Type: Complete pump & gearbox assembly with plumbing

• Pump Type: Triplex Plunger, Gear Drive

• Flow Rate: 4.0 GPM

• Max Pressure: 4000 PSI

• Rated Speed: 1450 RPM

• Gear Reducer: 5038.C2

• Unloader: VRT3-310EZ (included)

• Weight: 45 lb

• Manufacturer (Assembly): Pressure-Pro

• MPN: SLPHP4040UR-402

• Condition: New

Features & Benefits

• Genuine Pressure-Pro OEM pump and gearbox assembly

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

• Factory-plumbed for fast, drop-in replacement

• High-output 4.0 GPM / 4000 PSI performance

• Designed for smooth, low-RPM commercial operation

• Includes VRT3-310EZ unloader for precise pressure control

Applications

• Engine-driven commercial pressure washers

• Gear-drive pressure washer systems

• Industrial and fleet-wash equipment

• Replacement assembly for compatible Pressure-Pro units

• Equipment repair, refurbishment, and upgrades

Important Notes

• Verify engine compatibility, gear reducer requirements, and system RPM before ordering

• Designed for systems using HP4040 gear-drive pumps

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