TOYOTA DYNA TOYOACE COASTER BU60 BU61 BU70 BU80 13B 13BT 3B 3.4L 25T GEAR DRIVEN HEAVY DUTY HYDRAULIC POWER STEERING PUMP (OE: 44320-36090 / 44320-36091 / 44320-36050 / 44320-36051)

Overview

The Toyota Dyna / Coaster 13B Hydraulic Power Steering Pump (P/STG Pump Assembly 44320-36090 / 44320-36091) is a commercial-grade hydraulic steering component engineered specifically for Toyota Dyna, Toyoace, and Toyota Coaster commercial transport vehicles powered by Toyota 13B (3.4L), 13B-T (3.4L Turbo), and 3B (3.4L) 4-cylinder diesel engines (Dyna BU60, BU61, BU65, BU70, BU75, BU80, BU85, BU90 series cargo lorries, wooden body trucks, tippers, dump trucks, box vans, and Coaster BB20/BB30 passenger coaches equipped with gear-driven hydraulic power steering systems). Built with a precision 25-Tooth (25T) helical drive gear, standard engine flange mounting configuration, this hydraulic vane pump delivers steady, calibrated 80–90 bar line 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 cavitation/aeration, 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 25-Tooth (25T) helical drive gear

• Drive Type: Direct engine timing gear driven

• Operating Specifications: Nominal operating pressure 80–90 bar, factory-calibrated flow rate

• Hydraulic Ports: Threaded high-pressure discharge port & suction feed inlet tube connection with O-ring seal

• Measurement Notice: Key specifications including mounting flange bolt center-to-center pitch, pilot spigot diameter, 25T drive gear outer diameter, tooth pitch, and hydraulic port dimensions are labeled directly in the product photos.

• Please verify your existing pump gear teeth count (25T), mounting flange, and pipe connections against the measurements shown in our photos before ordering.

Compatible Truck & Bus Models & Engine Applications

• TOYOTA COMMERCIAL:

  • Dyna / Toyoace (BU60, BU61, BU65, BU70, BU75, BU80, BU85, BU90 Series Commercial Light Trucks, Cargo Lorries & Tippers)

  • Coaster Bus (BB20, BB21, BB30 Series Commercial Passenger Coaches)

• Engine Application:

  • Toyota 13B (3.4L 4-Cylinder Naturally Aspirated Diesel)

  • Toyota 13B-T (3.4L 4-Cylinder Direct Injection Turbo Diesel)

  • Toyota 3B (3.4L 4-Cylinder Diesel)

• OEM & Cross-Reference Part Numbers:

  • 44320-36090 (Toyota Genuine OEM)

  • 44320-36091

  • 44320-36050

  • 44320-36051

• (Note: In the Malaysian commercial lorry market, Toyota Dyna BU series powered by 13B engines run this 25T gear-driven pump. Please confirm your original gear tooth count [25T] and sample mounting pattern prior to ordering.)

Why Choose Our Commercial Fleet Parts?

• Calibrated High-Pressure Hydraulic Flow (80–90 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 25T Drive Gear: High-grade heat-treated 25-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 (25T) / sample photos to our team via WhatsApp for instant confirmation!