DAIHATSU DELTA DV99 DV116 DV57 V99 V116 TOYOTA DYNA 14B 3.7L RH GEAR DRIVEN HEAVY DUTY HYDRAULIC POWER STEERING PUMP (OE: 44320-87304 / 44310-36190 / 44320-87301 / 44320-87303)

Overview

The Daihatsu Delta / Toyota 14B Hydraulic Power Steering Pump (P/STG Pump Assembly 44320-87304 / 44310-36190) is a commercial-grade hydraulic steering component engineered specifically for Daihatsu Delta and Toyota commercial transport trucks powered by the Toyota 14B 3.7L 4-cylinder direct injection diesel engine (Daihatsu Delta DV99, DV116, DV57, V99, V116, and Toyota Dyna / Toyoace series cargo lorries, wooden body trucks, tippers, dump trucks, box vans, and tow trucks equipped with gear-driven hydraulic power steering systems). Built in the Right-Hand (RH) rotation, direct timing gear-driven, heavy-duty flange mounting configuration, this precision hydraulic vane pump delivers steady, calibrated 85–100 bar operating pressure directly to the power steering gearbox. Replacing a worn, whining, stiff, or leaking power steering pump eliminates heavy steering effort, cures steering wheel vibration and judder at engine idle RPM, prevents fluid aeration/cavitation, and restores smooth, effortless steering control under heavy commercial payloads and daily commercial operations.

Engineered to commercial fleet specifications verified against Malaysian commercial light truck and transport standards for dependable workshop replacement, steering overhaul, and preventive fleet 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 14.3 ml/r, Maximum operating pressure 100 bar, Operating speed range 500–3200 r/min, Controlled flow rate 7.0–9.0 L/min

• Hydraulic Ports: Threaded high-pressure discharge port (for banjo bolt or flare fitting) & suction feed 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 profile, and mounting flange dimensions against the measurements shown in our photos before ordering.

Compatible Truck Models & Engine Applications

• DAIHATSU TRUCKS:

  • Delta Series (DV99, DV116, DV57, V99, V116 Commercial Cargo Lorries, Wooden Body Trucks, Tippers & Box Vans)

• TOYOTA COMMERCIAL:

  • Dyna / Toyoace (BU Series Light Commercial Lorries)

  • Coaster Bus (BB42 Series running 14B engine)

• Engine Application:

  • Toyota / Daihatsu 14B (3.7L 4-Cylinder Direct Injection Diesel Engine)

  • Toyota 11B / 13B / 3B Engine Variants

• OEM & Cross-Reference Part Numbers:

  • 44320-87304 (Daihatsu / Toyota Genuine OEM)

  • 44310-36190

  • 44320-87301 / 44320-87302 / 44320-87303

• (Note: In the Malaysian commercial lorry market, Daihatsu Delta DV99 and DV116 running 14B engines utilize this RH gear-driven pump. Please confirm your original pump sample, rotation direction [RH], and flange profile prior to ordering.)

Why Choose Our Commercial Fleet Parts?

• Calibrated High-Pressure Hydraulic Flow (14.3 ml/r, 100 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 teeth resist 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 / sample photos to our team via WhatsApp for instant confirmation!