ISUZU ELF N-SERIES NPR NKR NHR NPR59 4BD1 4BD1T 4BC2 4BE1 3.3L 3.6L 3.9L 28T GEAR DRIVEN 100BAR HYDRAULIC POWER STEERING PUMP (OE: 8-97078-879-0 / 8970788790 / 8-97078-879)

Overview

The Isuzu Elf / NPR 4BD1 4BC2 Hydraulic Power Steering Pump (P/STG Pump Assembly 8-97078-879-0 / 8970788790) is a commercial-grade hydraulic steering component engineered specifically for Isuzu Elf and N-Series commercial light transport trucks powered by Isuzu 4BD1 (3.9L), 4BD1-T (3.9L Turbo), 4BC2 (3.3L), 4BC1 (3.3L), and 4BE1 (3.6L) 4-cylinder diesel engines (Isuzu NPR, NKR, NHR, and NPR59 series commercial cargo lorries, wooden body trucks, tippers, dump trucks, box vans, and tow trucks equipped with gear-driven hydraulic power steering systems). Built with a precision 28-Tooth (28T) helical drive gear, direct engine timing gear flange mounting configuration, this precision hydraulic vane pump delivers a steady, calibrated hydraulic flow rate of 7.0–8.0 L/min at up to 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 shuddering and judder at engine idle RPM, prevents hydraulic oil cavitation/aeration, and restores smooth, effortless steering control under heavy commercial payloads.

Engineered to commercial fleet specifications verified against Malaysian commercial light truck standards for dependable workshop replacement, steering system overhaul, and preventive chassis maintenance.

Key Dimensions (As Labeled in Product Photos)

• Mounting Configuration: Standard 2-bolt heavy-duty flange mounting (direct engine timing gear casing mount)

• Drive Mechanism: Precision-machined 28-Tooth (28T) helical drive gear

• Drive Type: Direct engine timing gear driven

• Operating Specifications: Nominal displacement 8.5–9.6 ml/r, Maximum operating pressure 100 bar, Operating speed range 500–6000 r/min, Controlled flow rate 7.0–8.0 L/min

• Hydraulic Ports: Threaded high-pressure discharge port (for banjo bolt or flare fitting) & suction feed inlet tube union with O-ring seal

• Measurement Notice: Key specifications including mounting flange bolt center-to-center pitch, pilot spigot diameter, 28T drive gear outer diameter, tooth pitch, and hydraulic port dimensions are labeled directly in the product photos.

• Please verify your existing pump gear tooth count (28T), mounting flange profile, and port connections against the measurements shown in our photos before ordering.

Compatible Truck Models & Engine Applications

• ISUZU COMMERCIAL TRUCKS:

  • Elf / N-Series (NPR, NKR, NHR, NPR59 Series 2-Ton, 3-Ton, 5-Ton Commercial Light Lorries, Cargo Trucks, Wooden Body Trucks, Tippers & Box Vans)

• Engine Application:

  • Isuzu 4BD1 / 4BD1-T (3.9L 4-Cylinder Naturally Aspirated & Turbo Diesel)

  • Isuzu 4BC2 / 4BC1 (3.3L 4-Cylinder Diesel)

  • Isuzu 4BE1 (3.6L 4-Cylinder Diesel)

• OEM & Cross-Reference Part Numbers:

  • 8-97078-879-0 / 8-97078879-0 (Isuzu Genuine OEM)

  • 8970788790

  • 8-97078-879

• (Note: In the Malaysian commercial lorry market, Isuzu Elf NPR running 4BD1/4BC2 engines utilizes this 28-tooth [28T] gear-driven pump. Do not confuse it with 4JB1/4JG1 belt-driven units or 4HF1/4HG1 models. Always verify your gear tooth count [28T] and mounting flange profile prior to ordering.)

Why Choose Our Commercial Truck Parts?

• Calibrated High-Pressure Hydraulic Flow (100 bar): Precision-machined internal rotor and vanes provide continuous, smooth 7.0–8.0 L/min hydraulic assistance even at low engine idling speeds, minimizing driver steering effort.

• Induction-Hardened 28T Drive Gear: High-grade heat-treated 28-tooth gear profile resists gear tooth pitting, backlash, and premature wear against the engine timing gear train.

• Rigid Flange Housing: Heavy-duty cast housing ensures structural alignment and eliminates leakage or casing warping under continuous hydraulic operating pressure.

• Integrated Flow Control & Relief Valve: Factory-calibrated 100-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 (28T) / sample photos to our team via WhatsApp for instant confirmation!