HYDB19P Universal Hydraulic Pump & Motor Base
System Overview
- Plain, universal mounting base designed to place a hydraulic drive motor and an Annovi Reverberi triplex plunger pump on a shared rigid plane.
- Provides a stable, square foundation for predictable alignment and clean plumbing layouts.
- Drill-to-fit plate allows builders to machine the motor pilot, bolt circle, and AR pump feet required for the build.
- Shared centerline mounting reduces bearing and seal side loading.
- Helps systems run cooler, quieter, and with reduced vibration compared to improvised brackets.
- Supports new builds, fleet standardization, and refurbishment of older rigs.
Base Geometry & Layout
Mounting Platform
- Rectangular outline integrates easily into skids, service bodies, vans, and plant carts.
- Perimeter space accommodates unloader blocks, guards, hose clamps, and fittings.
- Open center area preserves access to sight glass, vented dipstick, and fasteners.
- Designed for single-technician service access.
Hydraulic Motor Guidance
Motor Compatibility
- Motor-agnostic base compatible with compact LSHT hydraulic motors.
- Commonly used with external-gear motors and gerotor/geroler designs.
- Typical pressure and return porting is SAE-12 ORB (3/4″).
- Auxiliary case drain commonly SAE-8 ORB (1/2″) when required.
Hydraulic Sizing Reference
Selection Math
- RPM ≈ 231 × hydraulic GPM ÷ motor displacement (in³).
- Torque (lb-in) ≈ motor displacement (in³) × PSI ÷ 6.283.
- Hydraulic horsepower ≈ GPM × PSI ÷ 1714.
- Apply realistic efficiency factors to confirm usable shaft power.
Pump Interface & Origin
AR Pump Standards
- Pump manufacturer is always Annovi Reverberi.
- Pumps engineered and built in Modena, Italy.
- Water ends ship pre-filled with oil.
- Equipped with vented dipstick and easy-view sight glass.
Pump Porting Guidance
Common AR Connections
- RK and RK21xx mid-frame pumps typically use 1/2″ F-BSPP inlet and 3/8″ F-BSPP outlet.
- XWL and RTX mid-to-large frame pumps commonly use 1″–1¼” F-BSPP inlet and 1/2″ F-BSPP outlet.
- Adapters to NPT readily available.
- Verify exact porting in current AR North America documentation.
Warranty & Quality
Coverage Details
- AR pumps covered by a 5-year limited, conditional warranty.
- Coverage requires proper hydraulic and water-side installation.
- Correct filtration, lubrication, and operation within published limits required.
- Seals and valves treated as consumable wear items.
Installation & Plumbing Practices
Build Guidelines
- Machine and deburr pilot and bolt features before assembly.
- Set motor and pump on a shared centerline and verify coupling engagement.
- Snug hardware, test-run assembly, recheck alignment, then final-torque fasteners.
- Keep suction plumbing short, straight, and oversized from a flooded source.
- Use anti-collapse suction hose and coarse inlet strainer.
- Install adjustable unloader sized to AR pump duty class.
- Add high-pressure relief valve and glycerin-filled pressure gauge.
- Include thermal relief valve on bypass loop for seal protection.
- Specify 10–25 micron return filtration with appropriate beta rating.
- Size reservoir at 2–3× total system flow for heat rejection.
- Add oil cooling for hot climates, prolonged bypass, or continuous duty.
Included Components
Package Scope
- HYDB19P base plate only.
- Hardware, slides, guards, and accessories selected per build.
- Provides rigid, alignment-stable surface for repeatable installations.
Typical Applications
Use Environments
- Mobile wash skids and service-truck bodies.
- Enclosed vans and plant carts.
- Municipal and DOT fleet equipment.
- Rental turn-back refurbishment.
- Building services and contractor rigs.
- Utility platforms with existing hydraulic power.
Why Choose HYDB19P
Builder Advantages
- Rigid base improves pump bearing and seal longevity.
- Drill-to-fit flexibility supports common LSHT motors and AR pump feet.
- Compact footprint leaves room for short suction and clean hose routing.
- Open service access simplifies coupling inspection and maintenance.
- Predictable layout accelerates builds and supports fleet standardization.



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