HINO RANGER FF FD GD BUS EH700 EH700AK H07C 18T RH 13.6ML 100BAR HEAVY DUTY HYDRAULIC POWER STEERING PUMP (OE: 44310-1791 / 44310-1990 / S4431-01791)

Overview

The Hino EH700 / H07C Hydraulic Power Steering Pump (P/STG Pump Assembly 44310-1791 / 44310-1990) is a heavy-duty hydraulic steering component engineered specifically for Hino Ranger (FF, FD, GD series) commercial transport trucks and Hino bus chassis powered by Hino EH700, EH700AK, and H07C 6-cylinder diesel engines (cargo lorries, wooden body trucks, tippers, dump trucks, passenger buses, and commercial haulers equipped with gear-driven hydraulic power steering systems). Built in the Right-Hand (RH) rotation, 18-Tooth (18T) helical drive gear, standard 2-bolt flange mounting configuration, this hydraulic vane pump delivers a steady, calibrated hydraulic flow rate of 10.0 L/min at up to 100–110 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 2-bolt flange mounting (direct engine timing gear casing mount)

• Drive Mechanism: Precision-machined 18-Tooth (18T) helical drive gear (Right-Hand / RH rotation)

• Rotation Direction: Right-Hand (RH) rotation

• Operating Specifications: Nominal displacement 13.6 ml/r, Maximum operating pressure 100–110 bar, Operating speed range 500–3600 r/min, Controlled flow rate 10.0 L/min

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

• Measurement Notice: Key specifications including 2-bolt mounting flange center-to-center pitch, pilot spigot diameter, 18T drive gear outer diameter, tooth pitch, and hydraulic port thread sizes are labeled directly in the product photos.

• Please verify your existing pump rotation (RH), 18-tooth count, and 2-bolt flange profile against the measurements shown in our photos before ordering.

Compatible Truck Models & Engine Applications

• HINO TRUCKS & BUS:

  • Hino Ranger Series (FF, FD, GD Series Commercial Lorries, Cargo Trucks, Wooden Body Trucks, Tippers & Dump Lorries)

  • Hino Commercial Passenger Bus Chassis (EH700AK / H07C Bus Series)

• Engine Application:

  • Hino EH700 / EH700AK (6.4L 6-Cylinder Diesel Engine)

  • Hino H07C (6.7L 6-Cylinder Diesel Engine)

• OEM & Cross-Reference Part Numbers:

  • 44310-1791 (Hino Genuine OEM)

  • 44310-1990

  • S4431-01791

• (Note: In the commercial market, Hino EH700 power steering pumps exist in 2-bolt flange units with integrated tank [44300-1670], 3-hole flange units [44310-1561], and standard 2-bolt remote tank units [44310-1791]. Please verify your original pump sample and mounting flange type prior to ordering.)

Why Choose Our Commercial Truck Parts?

• Calibrated High-Pressure Hydraulic Flow (13.6 ml/r, 100–110 bar): Precision-machined internal rotor and vanes provide continuous, smooth 10.0 L/min hydraulic assistance even at low engine idling speeds, minimizing driver fatigue during tight maneuvers.

• Induction-Hardened 18T Drive Gear: High-grade heat-treated 18-tooth 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 (18T) / sample photos to our team via WhatsApp for instant confirmation!