HYD-RK1515 Hydraulic Motor Pump Package | RK1515

HYD-RK1515 | Hydraulic Motor Pump Package | 4.0 GPM 2200 PSI

HYD-RK1515 Hydraulic Motor Pump Package pairs an Annovi Reverberi RK 15.15 triplex plunger pump with a direct-coupled Sauer Danfoss hydraulic motor on rigid mounting rails — a complete, belt-free drive unit rated at 4.0 GPM and 2200 PSI (150 bar) at 1450 RPM. Powered entirely by your machine’s existing hydraulic circuit, it delivers dependable washdown performance on skid steers, tractors, utility trucks, and contractor rigs without a gas engine or electric motor anywhere in the system.

The HYD-RK1515 is the moderate-pressure sibling of the HYD-RK1520: same compact RK frame, same Danfoss motor architecture, same footprint on the rails — but tuned to a 2200 PSI duty point that covers the majority of real-world equipment cleaning, vehicle washdown, and facility maintenance work. If your application doesn’t demand 3000 PSI, this package does the job with lower drive-power draw, gentler wear on downstream components, and less overspray on painted and sensitive surfaces.

HYD-RK1515 Specifications

• SKU: HYD-RK1515
• Configuration: Hydraulic motor + pump package with mounting rails
• Pump: Annovi Reverberi RK 15.15 triplex plunger pump (228-series frame)
• Flow Rate: 4.0 GPM (15 L/min)
• Maximum Pressure: 2200 PSI (150 bar)
• Rated Speed: 1450 RPM
• Pump Power Requirement: 5.6 HP (4.2 kW) at full duty, per AR’s published rating
• Hydraulic Motor: Sauer Danfoss, direct-coupled via F38 close-couple flange
• Motor Hydraulic Ports: 1/2″ inlet and outlet
• Pump Inlet Ports (2): 1/2″ F
• Pump Discharge Ports (2): 3/8″ F
• Maximum Fluid Temperature: 140°F
• Pump Head: Brass, with one-piece ceramic plungers
• Weight: Approximately 31 lbs

Hydraulic Supply Requirements

Your machine’s auxiliary circuit must deliver continuous oil flow to the Danfoss motor — approximately 7.5 GPM at a working pressure in the neighborhood of 2,000 PSI for full 4.0 GPM / 2200 PSI water output, with the motor rated to 2,500 PSI maximum. That is roughly 8.5 hydraulic horsepower, comfortably within the auxiliary capability of nearly any skid steer, tractor, or utility truck. Annovi Reverberi also publishes gear-motor pairings for the RK 15.15 pump for custom installations: a 19cc motor drawing 31 L/min (8.2 GPM) at 101 bar (1,465 PSI), or an 11cc motor drawing 17 L/min (4.5 GPM) at 179 bar (2,595 PSI). Protect the motor with a properly set upstream relief valve, keep the return line short and low-restriction back to tank, and confirm adequate oil cooling for extended continuous-duty washing. If your available flow runs slightly below spec, the HYD-RK1515 simply runs proportionally slower — full rated water pressure still requires the full supply pressure listed.

Direct-Drive Advantages

The HYD-RK1515 uses AR’s F38 close-couple architecture: the hydraulic motor bolts directly to the pump on a shared centerline, eliminating belts, pulleys, guards, and couplers. That means less vibration, no belt dust or tension maintenance, minimal side loading on bearings and seals, and a footprint compact enough for tight service-body and trailer layouts. The included mounting rails keep the assembly aligned through transport and daily operation, and cleaning performance stays independent of engine speed fluctuations on the host machine.

Heavy-Duty RK-Series Construction

The RK 15.15 pump at the heart of the HYD-RK1515 carries a corrosion-resistant brass head with stainless-steel wet-end components, one-piece ceramic plungers for heat dissipation and abrasion resistance, and a pressed high-strength steel crankshaft on oversized bearings. The die-cast aluminum crankcase includes an oil sight glass for quick level checks, and intake and delivery valves sit behind service plugs for fast inspection without removing the pump from the rails.

Installation & Operation Notes

Mount the rail assembly horizontally, confirm hydraulic motor rotation before commissioning, and keep suction plumbing short and unrestricted with flooded suction preferred. Pair the discharge with a properly sized unloader set against the 2200 PSI rating and choose nozzle orifices for the 4.0 GPM duty point. Check crankcase oil at the sight glass before first start, and follow winterization procedures during cold-weather storage to protect the head and valves from freeze damage.

Quality Assurance & Maintenance

Every HYD-RK1515 package is built around a factory-tested Annovi Reverberi pump verified for flow rate, pressure stability, and vibration before shipment. Routine maintenance is limited to scheduled pump oil changes, seal inspection, and periodic valve checks using standard AR repair kits — and because the motor and pump separate at the flange, either component can be serviced or replaced independently.

HYD-RK1515 Key Features & Applications

• Complete hydraulic drive unit — AR RK 15.15 pump, Sauer Danfoss motor, and mounting rails, pre-coupled and aligned.
• 4.0 GPM at 2200 PSI, 1450 RPM — the balanced duty point for everyday equipment and fleet washdown.
• Requires approximately 7.5 GPM of hydraulic flow; runs on nearly any auxiliary circuit.
• F38 close-couple direct drive — no belts, pulleys, or couplers to maintain.
• Brass head, stainless wet-end components, and ceramic plungers for continuous duty.
• Lower pressure duty point reduces drive power draw and surface wear versus 3000 PSI class units.
• Ideal for skid steer and tractor washdown, fleet and municipal maintenance, agricultural equipment cleaning, and contractor rig integration.