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

HYDBK4M-4/5000 | Hydraulic Base Kit with Motor | 4 GPM 5000 PSI | Plumbed & Ready

HYDBK4M-4/5000 delivers extreme pressure as a finished system: an Annovi Reverberi extreme-pressure triplex plunger pump rated 4.0 GPM at up to 5000 PSI, close-coupled to its gear-type hydraulic motor and mounted, plumbed, and regulated on a base plate — unloader and pressure gauge installed — so the assembly bolts into a cabinet, work-truck platform, or tool compartment shelf, connects to hydraulics and water, and regulates correctly from the first trigger pull. Where the rest of the catalog sells pumps, motors, bases, and regulation as components, this SKU sells the afternoon of integration already done.

That completeness matters more at 5000 PSI than anywhere else in the compact class. Every regulation component on a strip-class system — the unloader, the gauge, the plumbing between them — must genuinely carry the working pressure, and sourcing, matching, and routing that hardware correctly is exactly where field-built 5000 PSI systems go wrong. The HYDBK4M-4/5000 removes that engineering risk at the bench it was built on: regulation matched to the pump’s flow and pressure range, bypass routing short and correct, the assembly delivered as one tested unit.

HYDBK4M-4/5000 Specifications

• SKU: HYDBK4M-4/5000
• Configuration: Complete plumbed hydraulic system — pump, close-coupled gear motor, unloader, and pressure gauge mounted on a base plate
• Pump: Annovi Reverberi extreme-pressure triplex plunger pump, corrosion-resistant brass head with stainless wet-end components
• Flow Rate: 4.0 GPM (15 L/min)
• Maximum Discharge Pressure: 5000 PSI (345 bar class)
• Rated Speed: 1450 RPM — never overspeed
• Pump Power Requirement: Approximately 13 HP at full duty
• Hydraulic Motor: Gear-type, close-coupled on the pump centerline
• Pressure Regulation: Plumbed unloader/regulator, factory-set for the rated duty point
• System Monitoring: Pressure gauge included
• Mounting: Base plate with hardware — bolt-down installation
• Maximum Fluid Temperature: 140°F
• Plungers: One-piece ceramic

Hydraulic Supply Requirements

Full 4.0 GPM at 5000 PSI performance calls for roughly 16 hydraulic horsepower — on the order of 9.8 GPM (37 L/min) of oil at approximately 2,800 PSI working pressure through the gear motor. Strong skid steer auxiliaries, tractor remotes, and truck hydraulic systems carry that envelope, and the gear motor keeps the hookup to a simple two-line pressure-and-return connection. Protect the motor with a relief set for its rating, route return oil short and filtered to tank, and provide oil cooling for stripping duty — this class of work is trigger-on by the hour. Call WSHPWR with your machine’s auxiliary flow and pressure and we will confirm the match before you order.

Why Buy the Plumbed System at This Pressure

A bare 5000 PSI drive unit hands the installer a checklist that punishes mistakes: select an unloader genuinely rated for the duty, mount and route the bypass correctly, find a gauge that survives the pulsation, and leak-test the assembly at pressure. Miss one item and the failure modes range from chattering regulation to burst fittings; get the unloader’s setting wrong and the pump lives outside its ratings from day one. The HYDBK4M-4/5000 ships with that checklist completed — regulation matched, plumbed, and set at the bench — which converts a specialized engineering task into a bolt-in installation and standardizes every truck in a fleet on identical, known-good plumbing. Verify the setting against the included gauge at commissioning and leave the regulation where the build put it: at this pressure class, chasing extra PSI past rated performance overloads the motor and shortens pump life in weeks rather than years.

The Close-Coupled Gear Drive

The gear motor bolts directly to the pump on one centerline — the simplest rotary drive in hydraulics, with two gears, one housing, no belts, couplers, or field alignment, and minimal side loading on bearings and seals. Output stays independent of the host machine’s engine speed, service demands amount to clean, filtered oil, and motor or pump dismounts independently when the years eventually ask.

Extreme-Pressure Construction

The pump carries AR’s extreme-pressure architecture: a corrosion-resistant brass head over stainless wet-end components, one-piece ceramic plungers for heat dissipation and abrasion resistance, and a crankcase with oil monitoring. Valve access through the head keeps inspection in place, and AR repair kits keep the service path standard — under the pressure rating, it remains an AR pump your shop already knows how to maintain.

Installation & Operation Notes

Mount the HYDBK4M-4/5000 horizontally through its base plate, confirm gear motor rotation before commissioning — gear motors are rotation-specific, and reversed lines spin the pump backward — and verify system pressure on the included gauge at first run. Feed the inlet from a flooded, filtered supply. Rate every downstream component — hose, wand, lance, nozzles — for 5000 PSI with margin; nothing carried from lower-pressure systems goes on unverified. Size nozzle orifices to 4.0 GPM at working pressure, hold 1450 RPM, flush after chemical sessions, and winterize before cold-weather storage — the unloader and gauge plumbing hold water too.

Quality Assurance & Maintenance

Every HYDBK4M-4/5000 is built around a factory-tested AR pump and delivered as a plumbed, regulated assembly. Maintenance follows the standard AR schedule — crankcase oil changes, seal inspection, periodic valve checks with AR repair kits — plus periodic unloader and gauge inspection, with seal intervals respected proportionally to the 5000 PSI duty.

HYDBK4M-4/5000 Key Features & Applications

• 4.0 GPM at 5000 PSI, 1450 RPM — strip-class duty as a complete plumbed, regulated system.
• Pump, close-coupled gear motor, unloader, and gauge mounted on one base plate — the 5000 PSI integration checklist done once, correctly.
• Runs on ~9.8 GPM of oil (~16 hydraulic HP) — strong auxiliary circuits qualify.
• Two-line gear-motor hookup; bolt-down base plate installation.
• Brass-head AR extreme-pressure pump with ceramic plungers and standard repair kits.
• Ideal for cabinet and work-truck installs, coating and mastic removal rigs, fleet strip systems, and upfitters standardizing extreme-pressure builds.