TOYOTA DYNA TOYOACE HINO DUTRO 300 COASTER XZU342 BB50 4B 14B 15B RH 14.5ML 110BAR HEAVY DUTY HYDRAULIC POWER STEERING PUMP (OE: 44310-36290 / 44310-37061 / 44310-37060 / S44310-36290)

Overview

The Toyota Dyna / Hino Dutro XZU342 4B / 14B / 15B Hydraulic Power Steering Pump (P/STG Pump Assembly 44310-36290 / S44310-36290) is a commercial-grade hydraulic steering component engineered specifically for Toyota Dyna, Toyoace, Hino Dutro 300 Series, and Toyota Coaster light-to-medium commercial vehicles powered by Toyota 4B, 14B (3.7L), 15B / 15B-FTE (4.1L) 4-cylinder diesel engines (XZU342, XZU300, XZU302, XZU340, BB50, and BB58 series cargo lorries, wooden body trucks, box vans, tippers, and light passenger coaches equipped with gear-driven hydraulic power steering systems). Built in the Right-Hand (RH) rotation, precision gear-driven, standard flange mounting configuration, this hydraulic vane pump delivers a steady, calibrated hydraulic flow rate at up to 110 bar operating pressure (14.5 ml/r displacement) 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 fluid 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 helical drive gear (Right-Hand / RH rotation)

• Rotation Direction: Right-Hand (RH) rotation

• Operating Specifications: Nominal displacement 14.5 ml/r, Maximum operating pressure 110 bar, Operating speed range 500–3600 r/min, Controlled flow rate 10.0–12.0 L/min

• Hydraulic Ports: Threaded high-pressure discharge port & suction oil inlet pipe union with O-ring seal

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

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

Compatible Truck & Bus Models & Engine Applications

• TOYOTA COMMERCIAL:

  • Dyna / Toyoace (XZU342, XZU300, XZU302, XZU330, XZU340, BU Series Commercial Light Trucks)

  • Coaster Bus (BB50, BB58, BB42 Series Commercial Passenger Coaches)

• HINO TRUCKS:

  • Dutro / 300 Series (XZU342, XZU300 Series Light Commercial Trucks)

• Engine Application:

  • Toyota 4B / 14B (3.7L 4-Cylinder Diesel)

  • Toyota 15B / 15B-FTE / 15B-FP (4.1L 4-Cylinder Turbo Diesel)

• OEM & Cross-Reference Part Numbers:

  • 44310-36290 (Toyota / Hino Genuine OEM)

  • 44310-37061 / 44310-37060

  • S44310-36290 (Hino Official EPC Format)

  • S4431-03629

• (Note: In the Malaysian light commercial lorry market, Dyna and Dutro XZU chassis have different pump variants between B-series engines [4B/14B/15B] and J/N-series engines [J05C/N04C]. Please check your engine model, gear teeth count, and original sample dimensions prior to ordering.)

Why Choose Our Commercial Fleet Parts?

• Calibrated High-Pressure Hydraulic Flow (14.5 ml/r, 110 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 RH Drive Gear: High-grade heat-treated gear profile resists gear tooth pitting, backlash, and premature wear against the engine timing gear train.

• Integrated Flow Control & Relief Valve: Factory-calibrated 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 / sample photos to our team via WhatsApp for instant confirmation!