HYD-RK1520V | Hydraulic Drive Triplex Pump Kit, 4.0 GPM 3000 PSI

HYD-RK1520V | Hydraulic Drive Triplex Pump Kit | 4.0 GPM 3000 PSI | Tapered Hollow Shaft

HYD-RK1520V is the catalog’s most-fielded duty point in its slip-on build: Annovi Reverberi’s RK 15.20 triplex plunger pump — 4.0 GPM (15 L/min) at up to 3000 PSI (200 bar) at 1450 RPM — in the V version, carrying the 1″ tapered hollow shaft from AR North America’s suffix system. Where flanged pumps bolt a motor to their face and solid-shaft pumps reach their drive through a coupling, the V configuration inverts the whole question: the pump slides over the drive’s shaft, keys, tightens, and runs. No coupler to buy, bore, align, or inspect; no bell housing; no baseplate geometry — the shortest mechanical path between a 1″-shaft power source and 4 gallons at 3000 PSI.

That interface earns its keep in two worlds at once. Hydraulic builds mount the HYD-RK1520V directly on 1″-tapered-shaft motor arrangements for the most compact drive the duty point allows. And conversion work — the trade of repowering machines whose drive presents the classic 1″ tapered shaft — gets the RK 15.20’s full commercial washing performance in the configuration that hangs where the old pump hung. Either way, the wet end underneath is the platform fleets standardize on: the 4-at-3000 spec that handles genuine cleaning without the extreme-pressure premium.

HYD-RK1520V Specifications

• SKU: HYD-RK1520V
• Configuration: Hollow-shaft pump — V version, 1″ tapered hollow shaft (slip-on mount); motor not included
• Pump: Annovi Reverberi RK 15.20 triplex plunger pump (228-series frame)
• Flow Rate: 4.0 GPM (15 L/min)
• Maximum Discharge Pressure: 3000 PSI (200 bar), per AR North America’s rating convention
• Rated Speed: 1450 RPM — never overspeed
• Power Requirement: Approximately 10 HP at full duty
• Shaft Interface: 1″ tapered hollow (V designation)
• Maximum Fluid Temperature: 140°F
• Pump Head: Corrosion-resistant brass with stainless wet-end components
• Plungers: One-piece ceramic

How Much Hydraulic Flow and Pressure Do I Need?

Full duty asks roughly 12 hydraulic horsepower delivered continuously — and here is that number the way your machine’s spec sheet states it: oil GPM × oil PSI ÷ 1,714 must reach about 12. Circuits that qualify: 8 GPM at 2,600 PSI, 7 GPM at 3,000 PSI, or 10 GPM at 2,100 PSI — ordinary skid steer auxiliaries, tractor remotes, and truck circuits clear this comfortably. Circuits that fall short: a light 5 GPM at 3,000 PSI remote delivers only ~9 HP and will not hold full duty. The drive for the HYD-RK1520V must present the 1″ tapered shaft the hollow interface fits — verify the taper and keyway against your motor or drive at order — and the motor’s displacement must land 1450 RPM on your circuit’s flow: RPM ≈ 231 × hydraulic GPM ÷ displacement (in³). Relieve within the motor’s rating, filter returns at 10–25 microns, provide oil cooling for continuous trigger-on duty, and call WSHPWR with your machine’s numbers — we will confirm shaft fit and sizing before you order.

The Slip-On Advantage

Every drive interface carries a parts list, and the hollow shaft’s is the shortest in the catalog. A coupled build needs the coupler, two bored hubs, an aligned base, and a guard; a belt build needs sheaves, a tensioner, and geometry. The HYD-RK1520V needs a key and a retaining bolt — the taper does the centering, the fit does the alignment, and the assembly is one rigid piece with nothing between motor and pump to wear, loosen, or inspect. For cabinet and cart builds counting inches, for repowers matching an existing shaft, and for anyone who has ever chased a coupler misalignment across a season of vibration, the slip-on architecture is the maintenance item that never gets created.

The 4-at-3000 Workhorse

The duty point under the HYD-RK1520V’s interface is the industry’s commercial standard for real cleaning: 3000 PSI breaks grease, grime, and surface soils that 2200-class machines soak and scrub at, while 4 GPM rinses at honest pace — and every accessory downstream comes off the deepest shelf in the business, because the whole washdown world tools around this number. The 228-series frame delivers it with AR’s signature serviceability: stainless valves behind service plugs, ceramic plungers, oil sight glass, and RK repair kits stocked everywhere AR is sold.

Installation & Operation Notes

Verify the drive shaft’s taper and keyway against the HYD-RK1520V’s hollow interface before ordering, mount with the key seated and the retaining hardware torqued to specification, and confirm rotation at commissioning — the pump turns whichever way the shaft does, so the shaft must turn the pump’s way. Feed the inlet from a flooded, filtered supply, fit an unloader set against working pressure with relief protection, size the nozzle to 4.0 GPM at your target pressure, hold 1450 RPM as the ceiling, and winterize before cold-weather storage.

Quality Assurance & Maintenance

Every HYD-RK1520V ships factory-tested for flow rate, pressure stability, and vibration. Maintenance is the familiar RK routine — crankcase oil changes, seal inspection, periodic valve checks with the industry’s most widely stocked repair kits — and the slip-on drive subtracts the coupling from the inspection list entirely: the interface that isn’t there never needs service.

HYD-RK1520V Key Features & Applications

• 4.0 GPM at 3000 PSI, 1450 RPM — the commercial-standard duty point on AR’s proven RK 15.20 platform.
• V-version 1″ tapered hollow shaft: the pump slides over the drive, keys, and runs — no coupler, ever.
• Needs only ~12 hydraulic HP — ordinary auxiliary circuits qualify; supply math in your machine’s terms.
• The shortest parts list in the catalog between power source and pressurized water.
• 228-frame serviceability with the industry’s most stocked repair kits.
• Ideal for direct-mount hydraulic drives with 1″ tapered shafts, machine repowers and conversions, cabinet and cart builds counting inches, and fleets standardizing the 4-at-3000 spec.