RTX70-DD-SX 18.5 GPM 2900 PSI Pump | Direct Drive Hydraulic

RTX70-DD-SX | Left Rotation Direct Drive Hydraulic Pump | 18.5 GPM 2900 PSI

RTX70-DD-SX is the mirror image of AR’s most versatile direct-drive pump: the RTX 70.200 platform — 18.5 GPM (70 L/min) at up to 2900 PSI (200 bar), 1450 RPM, 35 HP published rating, hollow 13-tooth splined shaft — factory-built for left-hand (counter-clockwise) rotation. The SX suffix is Annovi Reverberi’s designation for the reversed-rotation build, and it exists because rotation is not a preference on a triplex plunger pump: the crankcase lubrication pattern and drivetrain loading are engineered for one direction, and the correct answer to a left-turning drive is a left-turning pump, never a standard pump run backward.

Three installation realities create the demand. Hydraulic circuits and motors that deliver counter-clockwise shaft rotation as-built — re-plumbing a machine’s hydraulics to flip direction is invasive, while specifying the RTX70-DD-SX costs nothing. Mirrored twin-pump decks, where a right-hand and left-hand pair keeps plumbing symmetric, hoses short, and both units’ service sides facing outward. And reversed drive layouts in trucks and OEM machines where the motor position was fixed long before the pump was chosen. In each case, the SX build makes the installation clean instead of compromised.

RTX70-DD-SX Specifications

• SKU: RTX70-DD-SX
• Configuration: Direct-drive hydraulic pump, left-hand rotation — hollow 13T splined shaft mounts directly onto an SAE B hydraulic motor
• Rotation: Left-hand (counter-clockwise, viewed at the pump shaft) — factory-built SX version
• Pump: Annovi Reverberi RTX 70.200 SX (366-series frame)
• Flow Rate: 18.5 GPM (70 L/min)
• Maximum Discharge Pressure: 2900 PSI (200 bar)
• Rated Speed: 1450 RPM — never overspeed
• Power Requirement: 35 HP (26.1 kW) at full duty, per AR’s published rating
• Drive Interface: Hollow 13-tooth splined shaft, F56-class close-couple flange (SAE J498 B101)
• Inlet Ports (2): 1″ F
• Discharge Ports (2): 1/2″ F
• Maximum Fluid Temperature: 140°F
• Plungers: Ceramic
• Weight: Approximately 72 lbs (32.5 kg)
• Standard-rotation counterpart: RTX70-DD

Why Rotation Is a Specification, Not a Setting

Run a standard pump backward and nothing complains at first — which is exactly the danger. The crankcase’s splash lubrication is designed around the crank’s intended direction; reversed, oil distribution to bearings and crosshead surfaces degrades, and wear accumulates silently until it presents as a failed bearing or scored plunger far ahead of schedule. Threaded drive hardware torqued against intended rotation can also work loose. The RTX70-DD-SX deletes the entire failure category: same wet end, same performance, with the rotating group built and validated for counter-clockwise duty. If your motor turns left, this is the pump — full stop.

Hydraulic Supply Requirements

The platform’s published pairings apply with rotation matched left: gear 90cc on 37.5 GPM of oil at 1,987 PSI; piston 64cc on 26.9 GPM at 2,756 PSI; gear 44cc on 18.8 GPM at 3,481 PSI; piston 34cc on 14.5 GPM at 5,076 PSI — roughly 38–43 hydraulic horsepower continuously, whichever fits your circuit. Confirm your motor is built or configured for CCW output rotation (most gear motors are direction-specific by port assignment; many piston motors are configurable), relieve within its rating, and engineer return filtration and cooling for shift duty. Call WSHPWR with your circuit’s flow, pressure, and rotation and we will confirm the complete left-hand drive before you order.

Mirrored Decks and Twin Installs

Twin-pump builds are where the RTX70-DD-SX earns real money: pair it with the standard-rotation RTX70-DD and both pumps mount facing outward with symmetric plumbing — suction runs equal length, discharge manifolds balance naturally, and both service sides stay accessible at the deck edges. Fleets running high-output jetting or wash systems get 37 GPM of combined capacity with a layout a technician can actually maintain, instead of the hose spaghetti a same-rotation pair forces.

Direct-Drive Architecture

The hollow 13T spline engages a male-splined SAE B motor at the F56 flange — no coupler, no belt, no field alignment, no side load on bearings or seal packs — and motor or pump dismounts independently at the flange. Repair kits and wet-end parts interchange with the standard-rotation RTX family; the SX difference lives in the rotating group, not the parts shelf.

Installation & Operation Notes

Verify rotation twice: the motor’s actual output direction at commissioning, and the pump’s rotation arrow against it — the one check that matters most on this SKU. Confirm the 13T SAE B spline before ordering (14T SAE C hardware will not engage), mount horizontally, and feed the dual 1″ inlets from a flooded, filtered, full-size supply. Fit an unloader plus safety relief rated for the working pressure, size nozzles to the 18.5 GPM duty point, hold 1450 RPM as the ceiling, and winterize before cold-weather storage.

Quality Assurance & Maintenance

Every RTX70-DD-SX ships factory-tested for flow rate, pressure stability, and vibration in its left-hand configuration. Service follows the shared RTX schedule — crankcase oil changes, seal inspection, in-place valve checks with common AR repair kits — on the same intervals as the standard-rotation fleet.

RTX70-DD-SX Key Features & Applications

• Factory left-hand rotation build of the 18.5 GPM / 2900 PSI RTX 70.200 platform — never run a standard pump backward.
• Hollow 13T splined shaft direct-drives from a CCW-configured SAE B hydraulic motor.
• Four published motor pairings apply, ~38–43 hydraulic HP — rotation-matched left.
• Pairs with the standard RTX70-DD for symmetric twin-pump decks — 37 GPM combined, serviceable layout.
• Wet-end parts and repair kits interchange with the standard-rotation RTX family.
• Ideal for CCW hydraulic circuits, mirrored twin-pump systems, reversed truck and OEM drive layouts, and high-output jetting or wash builds.