Part Number: EZ4040G-VRT3-310EZ
Category: Pressure Washer Pumps → Triplex Pumps → Ready-to-Install Pump Assemblies
Type: General Pump PMR EZ4040G-VRT3-310EZ Pump Made Ready with Thermal Relief

The General Pump PMR EZ4040G-VRT3-310EZ Pump Made Ready with Thermal Relief (Part #6163) is a factory-configured, ready-to-install triplex pressure washer pump assembly designed for demanding commercial and industrial cleaning applications. Built around the General Pump EZ4040G triplex pump, this complete assembly comes pre-equipped with a VRT3-310EZ unloader valve and thermal relief valve, minimizing installation time while delivering reliable pressure regulation and pump protection.

Key Features & Benefits

• Genuine General Pump ready-to-install pump assembly
• Part Number: 6163
• Built around the General Pump EZ4040G triplex pump
• Pre-installed VRT3-310EZ unloader valve
• Includes factory-installed thermal relief valve
• Rated for 4.0 GPM at 4,000 PSI
• Operates at 3,400 RPM
• 1-inch hollow shaft for direct engine mounting
• Compatible with engines up to 14.5 HP
• Reduces installation time with factory-installed components
• Helps protect the pump from overheating during bypass operation
• Designed for commercial and industrial pressure washing systems

Technical Specifications

Part Number: 6163

Pump Model: EZ4040G

Manufacturer: General Pump (GP)

Product Type: Pump Made Ready Assembly

Maximum Flow Rate: 4.0 GPM

Maximum Pressure: 4,000 PSI

Maximum Speed: 3,400 RPM

Horsepower: 14.5 HP

Shaft Size: 1"

Unloader Valve: VRT3-310EZ

Thermal Relief Valve: Included

Weight: 25 lbs

OEM Replacement: Yes

Compatible Applications

Designed for use with compatible gas-powered pressure washers utilizing:

• General Pump EZ4040G pump applications
• 1-inch horizontal engine shafts
• Engines up to 14.5 HP
• Commercial pressure washers
• Industrial pressure washers
• Mobile pressure washing equipment
• Equipment repair and replacement projects
• OEM equipment installations

Always verify shaft size, engine horsepower, mounting dimensions, and pressure/flow requirements before installation.

Function of the Pump Made Ready Assembly

The PMR EZ4040G-VRT3-310EZ assembly helps:

• Deliver up to 4.0 GPM of water flow
• Produce operating pressures up to 4,000 PSI
• Regulate system pressure through the integrated VRT3-310EZ unloader
• Protect the pump during bypass with the thermal relief valve
• Reduce installation time with a factory-configured assembly
• Provide reliable, high-performance cleaning for demanding pressure washing applications

The integrated thermal relief valve helps prevent excessive heat buildup by automatically discharging overheated bypass water when necessary.

Common Signs Replacement Is Needed

Replace the pump assembly if you notice:

• Low operating pressure
• Reduced water flow
• Excessive pump noise
• External water or oil leaks
• Pump overheating
• Unloader valve failure
• Cracked or damaged pump housing
• Excessive internal wear
• Thermal relief valve malfunction

Replacing the complete pump assembly restores pressure washer performance while minimizing installation time and service downtime.

Installation & Service Notes

• Shut down the pressure washer and relieve all system pressure.
• Verify compatibility with the engine shaft, horsepower, and mounting configuration.
• Install the pump onto the engine according to the manufacturer's specifications.
• Connect the water inlet, high-pressure outlet, and required plumbing.
• Verify the VRT3-310EZ unloader and thermal relief valve are properly installed.
• Prime the pump with water before startup.
• Inspect the system for leaks and verify proper operating pressure after installation.

Important: Never operate the pump without an adequate water supply. Running the pump dry or allowing extended bypass operation without proper cooling can significantly reduce pump life.

Maintenance Recommendations

• Inspect the pump regularly for leaks and abnormal operating noise.
• Check pump oil level and service according to General Pump maintenance recommendations.
• Verify proper operation of the VRT3-310EZ unloader valve.
• Inspect the thermal relief valve periodically for proper operation.
• Flush the system after use when pumping dirty or corrosive water.
• Use only genuine OEM General Pump replacement parts and accessories to maintain maximum performance, reliability, and long service life.