HYD-RK1520M Hydraulic Motor Pump Package | Marzocchi

HYD-RK1520M Hydraulic Motor Pump Package 4.0 GPM @ 3000 PSI

• HYD-RK1520M is a compact, belt-free hydraulic drive package that mounts a
  Marzocchi external-gear LSHT hydraulic motor directly to an
  Annovi Reverberi RK1520 triplex plunger pump on a rigid,
  alignment-stable plane.
• Direct coupling keeps the motor and pump on the same centerline, eliminating
  belt tensioning and bulky guards while reducing side loads on bearings and
  seal packs for cooler, quieter operation and longer life.
• Layout anticipates real plumbing: short, direct suction, tidy pressure and
  bypass routing, and perimeter space for an unloader block without tight bends.
• Technicians retain clear access to the coupling, oil sight glass, vented
  dipstick, and perimeter fasteners so one person can perform coupling checks,
  oil changes, and torque verification with common tools.

Water Performance

• Typical HYD-RK1520M RK1520 duty points in this configuration:
  • ≈ 4.0 GPM @ 3000 PSI near 1450 RPM.
• Select nozzle orifices to match your chosen duty point and
  never overspeed the pump.

Hydraulic Motor & Ports

• Included drive: Marzocchi external-gear LSHT hydraulic motor;
  displacement is matched to reach the target pump RPM and torque under load for
  calm trigger cycling and stable pressure.
• Hydraulic Specifications: 7.5 gpm (29 Liters) @ 2500 psi (175 Bar)
• Typical hydraulic porting for this motor class:
  • SAE-12 ORB (3/4″) pressure/return ports.
  • SAE-8 ORB (1/2″) case drain when specified by the motor build.
• Verify the supplied motor, observe A/B port orientation for correct rotation,
  route any case-drain line above reservoir oil level to prevent aeration, size
  hose IDs generously, and respect bend radii to avoid restriction.

Pump Interface (RK1520)

• Pump model: HYD-RK1520M Annovi Reverberi RK1520 triplex plunger pump
  engineered for light industrial washdown and rinse duty.
• Port sizes:
  • Inlet: 1/2″ F-BSPP.
  • Outlet: 3/8″ F-BSPP.

  Adapters to NPT are readily available.

• 4.0 GPM @ 3000 PSI
• Keep suction plumbing short, straight, and oversize from a flooded supply; use
  an anti-collapse suction hose and a coarse inlet strainer to protect volumetric
  efficiency and prevent cavitation.

Manufacturer, Origin & Warranty

• Pump manufacturer: Annovi Reverberi (AR), leader in quality
  since 1958, with pumps engineered and manufactured in Modena, Italy.
• AR pumps HYD-RK1520M ship pre-filled with oil and include a vented dipstick and sight
  glass for fast pre-start checks.
• Water end warranty: 5-year limited, conditional—requires
  proper hydraulic and water-side installation, correct filtration and
  lubrication, and operation within published limits; seals and valves are
  treated as consumables.

Integration & Sizing (Shop-Ready)

• Match motor displacement and available hydraulic flow/pressure to the target
  pump speed using:
  • RPM ≈ 231 × hydraulic GPM ÷ motor displacement (in³)
  • Torque (lb-in) ≈ displacement (in³) × PSI ÷ 6.283
  • Hydraulic HP ≈ GPM × PSI ÷ 1714 (apply efficiency for real shaft power)
• Set upstream reliefs correctly (for example, 1000–2000 PSI
  depending on your selected duty).
• Specify 10–25 μm return filtration with an adequate β-rating.
• Size the reservoir for heat rejection using a practical rule of
  2–3× total system flow and add an oil cooler for hot
  climates, prolonged bypass, or continuous duty.
• Include a case drain if the motor build requires it; confirm routing is clean
  and unrestricted.
• On the water side, add a correctly sized adjustable unloader and
  high-pressure relief, a glycerin-filled pressure gauge for
  commissioning/diagnostics, and a thermal relief on the bypass loop for
  extended gun-closed operation.

HYD-RK1520M Hydraulic Motor Pump Package | Marzocchi

Direct-Drive Advantages

• Compact footprint that fits skids, service bodies, vans, and plant carts.
• No belts, no belt dust, and less guard bulk to manage.
• Alignment-stable geometry helps extend bearing and seal life by reducing
  side-loading and vibration.
• Predictable hose routing and standardized geometry support repeatable OEM
  builds and fleet standardization.
• Single-tech preventive maintenance: open access to coupling, oil sight glass,
  vented dipstick, and fasteners.

Applications

• Mobile wash skids and service trucks.
• Municipal/DOT fleets and public-works rigs.
• Plant carts and conveyor/parts-cleaning cells.
• Rental turn-backs and heavy-equipment yards.
• Food and beverage sanitation and washdown (observe local hygienic standards).
• Marine and tug-boat dock washdown.
• Agriculture and ranch equipment wash.
• Contractor rigs wherever hydraulic power is already available.