ISUZU GIGA C-SERIES E-SERIES CVR CXH CXZ EXR EXZ 6QA1 6RB1 E120 11.0L 13.7L 24T RH 20.5ML 100BAR HYDRAULIC POWER STEERING PUMP (OE: 475-03862 / 47503862 / 1-19500-310-3 / 1-19500310-3 / 1195003103)

Overview

The Isuzu Giga / C-Series 6QA1 6RB1 Hydraulic Power Steering Pump (P/STG Pump Assembly 475-03862 / 1-19500-310-3) is a commercial-grade hydraulic steering component engineered specifically for Isuzu Giga, C-Series, and E-Series heavy commercial transport trucks powered by Isuzu 6QA1 (11.0L), 6RB1 / 6RB1-T (13.7L), and E120 (12.0L) 6-cylinder diesel engines (CVR, CXH, CXZ, EXR, EXZ heavy cargo lorries, prime movers, wooden body trucks, tippers, dump trucks, concrete mixers, and heavy haulers equipped with gear-driven hydraulic power steering systems). Built in the Right-Hand (RH) rotation, 24-Tooth (24T) helical drive gear, heavy-duty engine flange mounting configuration, this precision hydraulic vane pump delivers a steady, calibrated hydraulic flow rate of 13.0–15.0 L/min at up to 100 bar operating pressure (20.52 ml/r nominal displacement) directly to the heavy-duty 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 heavy commercial fleet specifications for dependable workshop replacement, steering system overhaul, and preventive chassis maintenance.

Key Dimensions (As Labeled in Product Photos)

• Mounting Configuration: Heavy-duty direct flange mounting (engine timing gear casing mount)

• Drive Mechanism: Precision-machined 24-Tooth (24T) helical drive gear (Right-Hand / RH rotation)

• Rotation Direction: Right-Hand (RH) rotation

• Operating Specifications: Nominal displacement 20.52 ml/r, Maximum operating pressure 100 bar, Operating speed range 500–3200 r/min, Controlled flow rate 13.0–15.0 L/min

• 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, 24T drive gear outer diameter, tooth pitch, and hydraulic port dimensions are labeled directly in the product photos.

• Please verify your existing pump rotation (RH), 24-tooth count, and mounting flange profile against the measurements shown in our photos before ordering.

Compatible Truck Models & Engine Applications

• ISUZU HEAVY COMMERCIAL TRUCKS:

  • C-Series & E-Series (CVR, CXH, CXZ, EXR, EXZ Heavy Commercial Lorries, Prime Movers, Tippers, Dump Trucks & Concrete Mixers)

  • Giga Heavy Haulers & Cargo Carriers

• Engine Application:

  • Isuzu 6QA1 / 6QA1-T (11.0L 6-Cylinder Diesel)

  • Isuzu 6RB1 / 6RB1-T (13.7L 6-Cylinder Turbo Diesel)

  • Isuzu E120 (12.0L 6-Cylinder Diesel)

• OEM & Cross-Reference Part Numbers:

  • 475-03862 / 47503862 (TBK / Industry Standard Part Number)

  • 1-19500-310-3 / 1-19500310-3 / 1195003103 (Isuzu Genuine OEM)

  • 1-19500-310-0 / 1-19500-310-2 / 1-19500-310-5

• (Note: In the Malaysian commercial heavy vehicle market, Isuzu 6QA1 and 6RB1 engines on CVR/CXZ chassis utilize this 24T RH gear-driven pump [475-03862]. Please confirm your original gear tooth count [24T], rotation direction [RH], and flange profile prior to ordering.)

Why Choose Our Commercial Truck Parts?

• Calibrated High-Pressure Hydraulic Flow (20.52 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 heavy load maneuvers.

• Induction-Hardened 24T RH Drive Gear: High-grade heat-treated 24-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 (24T) / Rotation (RH) / sample photos to our team via WhatsApp for instant confirmation!