MITSUBISHI FUSO THE GREAT SUPER GREAT FM658 FV415 FV418 FS FP 6D40 6D40T 12.0L 40T LH 20.5ML 130BAR HYDRAULIC POWER STEERING PUMP (OE: 475-03558 / 47503558)

Overview

The Mitsubishi Fuso FM658 / 6D40 Hydraulic Power Steering Pump (P/STG Pump Assembly 475-03558 / 47503558) is a commercial-grade hydraulic steering component engineered specifically for Mitsubishi Fuso FM Series (FM658), The Great, and Super Great heavy commercial transport trucks powered by Mitsubishi 6D40 (12.0L) and 6D40-T turbocharged 6-cylinder diesel engines (FM658, FV415, FV418, FS, FP series heavy cargo lorries, wooden body trucks, tippers, dump trucks, concrete mixers, and prime movers equipped with gear-driven hydraulic power steering systems). Built in the Left-Hand (LH) rotation, 40-Tooth (40T) helical drive gear, square 4-bolt flange mounting configuration, this precision hydraulic vane pump delivers a steady, calibrated hydraulic flow rate of 17.0 L/min at up to 130 bar operating pressure (20.52 ml/r nominal displacement) 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 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 square 4-bolt flange mounting (direct engine timing gear casing mount)

• Drive Mechanism: Precision-machined 40-Tooth (40T) helical drive gear (Left-Hand / LH rotation)

• Rotation Direction: Left-Hand (LH) rotation

• Operating Specifications: Nominal displacement 20.52 ml/r, Maximum operating pressure 130 bar, Operating speed range 625–3200 r/min, Controlled flow rate 17.0 L/min

• Hydraulic Ports: Threaded high-pressure discharge port (M20 × 1.5) & ø23 mm suction feed inlet tube connection with O-ring seal

• Measurement Notice: Key specifications including square mounting flange bolt center-to-center pitch, pilot spigot diameter, 40T drive gear outer diameter, tooth pitch, and hydraulic port dimensions are labeled directly in the product photos.

• Please verify your existing pump rotation (LH), 40-tooth count, and square mounting flange profile against the measurements shown in our photos before ordering.

Compatible Truck Models & Engine Applications

• MITSUBISHI FUSO COMMERCIAL TRUCKS:

  • Fuso FM Series (FM658 Commercial Heavy Cargo Lorries, Wooden Body Trucks, Tippers & Dump Lorries)

  • Fuso The Great & Super Great Series (FV415, FV418, FS, FP Series Heavy Tippers, Concrete Mixers & Heavy Prime Movers)

• Engine Application:

  • Mitsubishi Fuso 6D40 / 6D40-T / 6D40-TE (12.0L 24-Valve Inline-6 Turbo Diesel)

  • Mitsubishi Fuso 6D24 (Select heavy commercial chassis variants)

• OEM & Cross-Reference Part Numbers:

  • 475-03558 / 47503558 (TBK / Industry Standard Part Number)

• (Note: In the Malaysian commercial heavy truck market, Mitsubishi Fuso 6D40 engines utilize this single-cartridge 40T LH pump with a square body [475-03558]. Do not confuse it with the double-cartridge unit [MC037687] or round-body models [MC093041]. Always verify your rotation direction [LH], 40-tooth count, and square flange profile prior to ordering.)

Why Choose Our Commercial Truck Parts?

• Calibrated High-Pressure Hydraulic Flow (20.52 ml/r, 130 bar): Precision-machined internal rotor and vanes provide continuous, smooth 17.0 L/min hydraulic assistance even at low engine idling speeds, minimizing driver fatigue during heavy load maneuvers.

• Induction-Hardened 40T LH Drive Gear: High-grade heat-treated 40-tooth gear profile resists gear tooth pitting, backlash, and premature wear against the engine timing gear train.

• Heavy-Duty Square Flange Housing: Rigid cast housing ensures structural alignment and eliminates leakage or casing warping under heavy continuous hydraulic load.

• Integrated Flow Control & Relief Valve: Factory-calibrated 130-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 (40T) / Rotation (LH) / sample photos to our team via WhatsApp for instant confirmation!