RKV4G37D-F24C2I | 4.0 GPM 3700 PSI Triplex Pump Unloader Installed

RKV4G37D-F24C2I | 4 GPM 3700 PSI Gas Engine Pump with Gymatic Unloader and Injector, 1 in. Hollow Shaft

The RKV4G37D-F24C2I is an Annovi Reverberi RK triplex plunger pump rated 4.0 GPM at 3,700 PSI at 3400 RPM, with a Gymatic 3/B unloader and adjustable chemical injector already installed. It slides onto a 1 in. engine shaft, bolts to the engine face, and is ready to plumb: no belts, no separate unloader to buy, no injector to add.

At 4 GPM and 3,700 PSI it is a strong contractor rating for concrete, fleets, equipment and degreasing. The Gymatic’s built-in bypass means no external bypass hose, and the adjustable injector sets the detergent ratio for each job. The crankshaft-driven triplex with ceramic plungers is built for daily contractor work and rebuilds with a kit when the seals finally wear.

What’s in the Box

• RKV4G37D-F24C2I pump with F24 engine flange
• Gymatic 3/B unloader with adjustable chemical injector, installed
• Crankcase oil, pre-filled at the factory
• Vented dipstick. The pump ships with a shipping plug in the oil port. Swap in the dipstick before the first start.
• Engine mounting bolts and lock washers
• Operation manual and parts schematic
• 5-year Annovi Reverberi warranty

The shaft key is not included. It comes with your engine, and its size is set by the engine maker.

Will It Fit My Machine?

• Shaft: your engine has a 1 in. keyed horizontal shaft.
• Mount: the engine face matches the F24 flange bolt pattern.
• Engine size: 389cc to 420cc (13 HP class and up).
• Detergent: the injector draws chemical at low pressure. Use a low-pressure soap nozzle and set the ratio with the adjuster.

Not sure? Text a pump specialist at (505) 226-6061 with a photo of your engine tag and we’ll confirm the fit.

What Else You’ll Need

• Thermal relief valves and inlet filters: the thermal valve protects the pump during long bypass periods, and the filter keeps debris out of the valves.

RKV4G37D-F24C2I Specifications

• Model: RKV4G37D-F24C2I
• Flow: 4.0 GPM
• Max Pressure: 3,700 PSI
• Speed: 3400 RPM (engine speed)
• Gas Engine Size: 389cc to 420cc
• Shaft: 1 in. hollow
• Mount: F24 engine flange
• Unloader: Gymatic 3/B with adjustable chemical injector, installed
• Plungers: Ceramic
• Max Water Temperature: 140°F
• Weight: 21 lbs
• Warranty: 5 years
• Brand: Annovi Reverberi

Shipping: Usually ships via UPS in 1 to 3 days.