HYD-RK1520V | Hydraulic Drive Triplex Pump Kit, 4.0 GPM 3000 PSI

HYD-RK1520V Hydraulic Direct-Drive Pump Assembly

The HYD-RK1520V hydraulic direct-drive pump assembly is a professional-duty pressure washer power unit designed for
installations where hydraulic power is already available. Built around an Annovi Reverberi hydraulic motor and the
proven RK1520 triplex plunger pump platform, this assembly delivers reliable, smooth, and efficient cleaning power
without belts, pulleys, or complicated mechanical drives. The direct-coupled design provides compact packaging,
reduced vibration, simplified service, and dependable performance for demanding commercial and industrial cleaning
applications.

Designed for OEM builds, work trucks, trailers, marine vessels, and stationary wash systems, the HYD-RK1520V provides
4.0 GPM at 3,000 PSI with capability up to 3,200 PSI when supported by the hydraulic
supply and properly configured relief settings. Its low-speed, high-torque hydraulic motor delivers smooth torque and
stable pressure output, making it ideal for continuous-duty and mobile cleaning environments.

System Overview & Performance Specifications

Water Pump Output

• Nominal Flow: 4.0 GPM (15.1 L/Min)
• Working Pressure: 3,000 PSI (206 Bar)
• Maximum Pressure Capability: 3,200 PSI
• Target Pump Speed: 1,450 RPM
• Pump Inlet Port: 1/2″ F
• Pump Outlet Port: 3/8″ F

Hydraulic Motor Requirements

• Hydraulic Flow: 7.5 GPM (29 L/Min)
• Hydraulic Pressure: 2,500 PSI (175 Bar)
• Motor Inlet: 1/2″
• Motor Outlet: 1/2″
• Motor Maximum Pressure: 175 Bar

Direct-Drive Hydraulic System Design

The HYD-RK1520V eliminates the need for belt drives by coupling the hydraulic motor directly to the pump crankshaft.
This configuration improves efficiency and removes common wear components while reducing installation complexity.

Key Advantages of HYD-RK1520V Direct Drive

• No belt tensioning or periodic belt replacement.
• No pulley wear or alignment drift.
• Reduced vibration and noise.
• Compact footprint for tight installations.
• Improved reliability and longer service life.
• Lower side-loading on bearings and seals.

Hydraulic Motor Engineering

The hydraulic motor is engineered for low-speed, high-torque operation and is factory matched to the RK1520 pump.
This ensures proper pump RPM at the specified hydraulic flow rate and allows smooth pressure rise during trigger
cycling.

Hydraulic Circuit Design

• Pressure and return ports typically sized as SAE-12 ORB (3/4″).
• Case drain provided when required by motor design.
• Motor displacement selected to achieve correct pump speed.
• Smooth torque delivery reduces pressure spikes.

Hydraulic System Requirements

• Upstream relief valves must protect the motor and circuit.
• Return filtration recommended at 10–25 microns.
• Reservoir sized at 2–3× system flow.
• Oil cooling recommended for hot climates or continuous duty.

RK1520 Triplex Pump Technology

The HYD-RK1520V Annovi Reverberi RK1520 pump features a triplex ceramic plunger design that provides smooth pressure delivery,
reduced pulsation, and long service intervals. The brass pump manifold offers excellent corrosion resistance and
strength for daily commercial use.

Pump Construction Features

• Ceramic plungers for wear resistance and longevity.
• Heavy-duty brass manifold.
• Precision crankshaft and bearings.
• Factory-filled crankcase with oil sight glass and dipstick.

Water-Side Plumbing Best Practices

• Flooded suction preferred whenever possible.
• Use oversized suction hose with minimal bends.
• Install coarse inlet strainer.
• Ensure unrestricted bypass return.

Protection & Safety Components

• Adjustable unloader set to 3,000 PSI.
• Secondary high-pressure relief valve.
• Thermal relief valve for bypass protection.
• Pressure gauge for diagnostics.

Hydraulic Pressure Washer Applications

Agricultural Equipment Cleaning

• Tractors, harvesters, and combines.
• Livestock facility sanitation.
• Irrigation equipment cleaning.
• Milking parlor washdown.

Food Manufacturing & Sanitation

• Processing equipment cleaning.
• Packaging line washdown.
• Facility sanitation programs.
• Loading dock cleaning.

Clean-In-Place (CIP) Systems

• Tank exterior cleaning.
• Process equipment washdown.
• Sanitary plant maintenance.

Work Trucks & Service Vehicles

• Utility service trucks.
• Oilfield service rigs.
• Municipal maintenance vehicles.
• Mobile wash skids.

Marine & Tug Boat Applications

• Deck wash systems.
• Engine room cleaning.
• Saltwater corrosion control.
• Dock and pier maintenance.

Conveyor Cleaning & Maintenance

• Food processing conveyors.
• Mining and aggregate conveyors.
• Packaging and logistics lines.
• Industrial production equipment.

Industrial Facilities & Manufacturing

• Warehouse washdown.
• Machine maintenance.
• Floor and facility cleaning.

Installation & Integration Guidance

• Mount on flat, rigid surface.
• Verify motor rotation before startup.
• Confirm coupling engagement.
• Recheck fasteners after initial run.

Planning Formulas

• RPM ≈ 231 × hydraulic GPM ÷ displacement.
• Torque ≈ displacement × PSI ÷ 6.283.
• Hydraulic HP ≈ GPM × PSI ÷ 1714.

Maintenance & Service

• Monitor pump oil level regularly.
• Keep hydraulic oil clean and cool.
• Inspect hoses and fittings routinely.
• Replace inlet strainers and filters as needed.

Summary

The HYD-RK1520V hydraulic direct-drive pump assembly provides compact installation, reliable performance, and reduced
maintenance for hydraulic-powered pressure washing systems. With 4.0 GPM at 3,000 PSI, a matched hydraulic motor,
and a proven triplex pump platform, this system is engineered for professional operators who demand dependable output,
long service life, and flexible integration across mobile and industrial cleaning environments.