HINO 500 700 PROFIA FM2P FS2P FN P11C 19T RH ROUND TYPE SMALL SHAFT 20.0ML 140BAR HEAVY DUTY HYDRAULIC POWER STEERING PUMP / P/STG PUMP (OE: 44310-1772 / 44310-2530 / S4431-1772)

Overview

The Hino FM2P / Profia P11C Hydraulic Power Steering Pump (P/STG Pump Assembly 44310-1772 / S4431-1772) is a heavy-duty hydraulic steering component engineered specifically for Hino 500, 700, Profia, and commercial transport trucks powered by the Hino P11C 10.5L 6-cylinder turbo diesel engine (FM2P, FS2P, FN, and related heavy cargo lorries, tippers, dump trucks, concrete mixers, prime movers, and heavy haulers equipped with gear-driven hydraulic power steering systems). Built in the Right-Hand (RH) rotation, 19-Tooth (19T) small drive gear, Round Type flange (Small Shaft with retaining nut) configuration, this high-output hydraulic vane pump delivers a steady, calibrated hydraulic flow rate of 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: Heavy-duty round flange mounting (Round Type direct engine timing gear casing mount)

• Drive Mechanism: Precision-machined 19-Tooth (19T) helical drive gear (Small Shaft & Gear configuration)

• 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 20.0 L/min

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

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

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

Compatible Truck Models & Engine Applications

• HINO TRUCKS: 500 Series, 700 Series, Profia (FM2P, FS2P, FN Series Heavy Cargo Lorries, Wooden Body Trucks, Tippers, Dump Trucks, Concrete Mixers & Prime Movers)

• Engine Application:

  • Hino P11C / P11C-TI / P11C-UB / P11C-UP (10.5L 6-Cylinder Turbo Diesel)

• OEM & Cross-Reference Part Numbers:

  • 44310-1772 (Hino Genuine OEM)

  • 44310-2530

  • S4431-01772

  • 4431-1772

• (Note: In the Malaysian commercial truck market, Hino P11C engines use either a 19T small gear configuration [44310-1772] or a 27T big gear configuration [44310-1610]. Please verify your original gear tooth count [19T] and shaft profile 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 20.0 L/min 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!