HINO 700 PROFIA SUPER DOLPHIN FS FR FW SS SH K13C K13D 19T RH 20.0ML 140BAR HEAVY DUTY HYDRAULIC POWER STEERING PUMP / P/STG PUMP (OE: 44310-2250 / S44310-2250 / S4431-02250)

Overview

The Hino Profia / Super Dolphin K13C Hydraulic Power Steering Pump (P/STG Pump Assembly 44310-2250 / S44310-2250) is a heavy-duty hydraulic steering component engineered specifically for Hino Profia, Super Dolphin, and 700 series heavy commercial transport trucks powered by Hino K13C (12.9L) and K13D inline-6 turbo diesel engines (FS, FR, FN, FW, SS, SH series heavy cargo lorries, dump trucks, tippers, concrete mixers, prime movers, and multi-axle heavy haulers equipped with gear-driven hydraulic power steering systems). Built in the Right-Hand (RH) rotation, 19-Tooth (19T) helical drive gear, heavy-duty flange mounting configuration, this high-output hydraulic vane pump delivers a steady, calibrated hydraulic flow rate of 18.0–20.0 L/min at up to 140 bar operating pressure directly to the power steering gearbox. Replacing a worn, whining, or leaking power steering pump eliminates heavy or stiff steering, cures steering wheel shuddering at low engine idling RPM, prevents hydraulic oil aeration/cavitation, and restores smooth, effortless steering control under heavy commercial payloads.

Engineered to heavy commercial fleet specifications for dependable workshop replacement, steering system overhaul, and preventive chassis maintenance.

Key Dimensions (As Labeled in Product Photos)

• Mounting Configuration: Standard heavy-duty flange mounting (direct engine timing gear casing mount)

• Drive Mechanism: Precision-machined 19-Tooth (19T) helical drive gear (Right-Hand / RH rotation)

• Rotation Direction: Right-Hand (RH) rotation

• Operating Specifications: Nominal displacement 20.0 ml/r, Maximum operating pressure 140 bar, Operating speed range 500–3600 r/min, Controlled flow rate 18.0–20.0 L/min

• Hydraulic Ports: Standard threaded high-pressure discharge port (for banjo bolt or flare fitting) & suction feed inlet pipe union

• Measurement Notice: Key specifications including mounting flange bolt center-to-center pitch, pilot spigot diameter, 19T drive gear outer diameter, tooth pitch, and hydraulic port dimensions are labeled directly in the product photos.

• Please verify your existing pump rotation (RH), 19-tooth count, and mounting flange profile against the measurements shown in our photos before ordering.

Compatible Truck Models & Engine Applications

• HINO TRUCKS: Profia, Super Dolphin, 700 Series Heavy Commercial Trucks (FS, FR, FN, FW, SS, SH Series Heavy Cargo Lorries, Wooden Body Trucks, Tippers, Dump Trucks, Concrete Mixers & Heavy Prime Movers)

• Engine Application:

  • Hino K13C / K13C-T / K13C-TI / K13C-TJ / K13C-TF (12.9L 6-Cylinder Turbo Diesel)

  • Hino K13D (13.3L 6-Cylinder Diesel)

• OEM & Cross-Reference Part Numbers:

  • 44310-2250 (Hino Genuine OEM)

  • S44310-2250 (Hino Official EPC Format)

  • S4431-02250

  • 44310-2540 / S44310-2540

• (Note: In the commercial heavy truck market, Hino heavy-duty chassis run different gear drive setups across engine models. Please verify your original gear tooth count [19T], pump body profile, and sample dimensions prior to ordering.)

Why Choose Our Commercial Truck Parts?

• Calibrated High-Pressure Hydraulic Flow (20.0 ml/r, 140 bar): Precision-machined internal rotor and vanes provide continuous, smooth hydraulic assistance even at low engine idling speeds, minimizing driver fatigue during tight maneuvers.

• Induction-Hardened 19T Drive Gear: High-grade heat-treated 19-tooth gear profile resists gear tooth pitting, backlash, and premature wear against the engine timing gear train.

• Integrated Flow Control & Relief Valve: Factory-calibrated 140-bar internal pressure relief valve ensures stable line pressure while preventing high-pressure line bursts during full steering lock.

• High-Grade Oil Seals: Heat- and oil-resistant internal seals prevent hydraulic steering fluid from leaking into the engine oil crankcase.

• Ready Stock & Fast Shipping: Readily stocked for quick dispatch across Peninsular and East Malaysia.

Need Help Confirming Fitment?

Unsure whether this power steering pump matches your lorry's existing engine setup?

• Check your old pump against the measurements shown in our pictures.

• Or send your Chassis Number (VIN) / Engine Model / Gear Teeth Count (19T) / sample photos to our team via WhatsApp for instant confirmation!