HYDBK4M-4/5000 Hydraulic Base Package | 4 GPM 5000 PSI

HYDBK4M-4/5000 Hydraulic Drive Base Package

System Overview

• Complete hydraulic pump-and-motor base package configured for the 4.0 GPM at 5000 PSI duty class.
• Pairs a Marzocchi external-gear hydraulic motor with a heavy, rigid steel base and long-travel slide system.
• Motor and Annovi Reverberi triplex pump share a precise coaxial centerline.
• Direct, belt-free layout reduces footprint and eliminates belt guards and alignment drift.
• Lower side loading on bearings and seal packs promotes cooler operation and reduced vibration.
• Designed for tight skids, service bodies, enclosed vans, and plant carts with single-technician access.

Hydraulic Motor & Circuit

• Includes a Marzocchi external-gear LSHT hydraulic motor sized for 4.0 GPM at 5000 PSI output.
• Motor torque matched to high-pressure duty; verify prime-mover capacity for water horsepower demand.
• Typical pressure and return porting is SAE-12 ORB (3/4″).
• Auxiliary SAE-8 ORB (1/2″) case drain used on many builds; verify on supplied motor.
• Case drain routed above reservoir oil level to prevent aeration.
• A/B port orientation must be observed for correct rotation.
• Upstream relief protection and 10–25 micron return filtration with adequate beta rating required.
• Reservoir sized at 2–3× total system flow for heat rejection.
• Oil cooling recommended for hot climates, prolonged bypass, or continuous duty.

Pump Interface & Plumbing

• Base drilled and slotted for common Annovi Reverberi pump feet.
• Guard standoffs and shim pack included for accurate shaft height and coupling alignment.
• AR triplex pump selected separately to meet 4.0 GPM at 5000 PSI duty target.
• Annovi Reverberi HYDBK4M-4/5000 pumps engineered and built in Modena, Italy.
• Typical 4 GPM-class AR heads use 1/2″ F-BSPP inlet and 3/8″ F-BSPP outlet.
• Adapters to NPT readily available; verify porting on selected pump.
• Suction plumbing kept short, straight, and oversized from a flooded supply.
• Anti-collapse suction hose and coarse inlet strainer recommended.
• Adjustable unloader and correctly sized high-pressure relief required for 5000 PSI operation.
• Glycerin-filled gauge and thermal relief valve required for commissioning and bypass protection.

Controls, Sizing & Layout

• Motor and pump sizing confirmed using standard hydraulic calculations.
• RPM ≈ 231 × hydraulic GPM ÷ motor displacement (cid).
• Torque ≈ displacement (cid) × PSI ÷ 6.283.
• Hydraulic horsepower ≈ GPM × PSI ÷ 1714 with realistic efficiencies applied.
• Hose IDs sized generously with minimum bend radii respected.
• Return and bypass plumbing kept unrestricted to control heat.
• Compact base layout supports short suction and clean pressure and bypass routing.

Service & Warranty

• Annovi Reverberi pumps HYDBK4M-4/5000 ship with oil in the crankcase.
• Includes easy-view sight glass and vented dipstick for pre-start inspection.
• Follow AR lubricant recommendations and service intervals.
• Periodic torque checks recommended after initial run-in.
• AR pump warranty is 5-year limited, conditional coverage.
• Warranty requires proper hydraulic and water installation and operation within published limits.
• Seals and valves treated as consumable wear items.

HYDBK4M-4/5000 Applications

• Mobile and industrial systems with onboard hydraulic power.
• Tug-boat and dock washdown.
• Aquaculture and marina sanitation.
• Farm and ranch equipment wash.
• Food and beverage plants observing local hygienic standards.
• Municipal and DOT fleets.
• Environmental and waste services.
• Work-truck skids, enclosed vans, plant carts, rental yards, and contractor rigs.

HYDBK4M-4/5000 Hydraulic Base Package | 4 GPM 5000 PSI

Package Highlights

• Marzocchi external-gear hydraulic motor included.
• Typical motor ports SAE-12 ORB with optional SAE-8 case drain.
• AR pump manufacturer is Annovi Reverberi, Modena, Italy.
• Pump ships with oil and vented dipstick; pump sold separately unless specified.
• Heavy base with long-travel slides supports precise, repeatable alignment.
• Guard standoffs, shim pack, and mounting hardware included.
• Duty target of 4.0 GPM at 5000 PSI.
• Configured for professional mobile, municipal, industrial, and contractor use.