A high-output 24V alternator that converts engine mechanical energy into reliable electrical power, maintaining battery charge and supporting all onboard electrical systems—from engine ECU to work lights—in heavy-duty Isuzu 6HK1 and 4HK1 engines found in trucks, excavators, and industrial equipment.

The Alternator Assembly (OEM Numbers: 1812006032, 1-81200603-2, 1876182840 / Model: JFWZ2422B) is a premium-quality, direct replacement charging system component engineered specifically for the ISUZU 6HK1 (7.8L) and 4HK1 (5.2L) common-rail turbo diesel engines—the workhorses powering NPR, NQR, FRR, FVR, FTR, and GIGA series trucks, plus Hitachi, JCB, Case, Sumitomo, Kobelco, New Holland, Hidromek, Sany, TCM and XCMG heavy equipment worldwide.

This 24V alternator is the heart of the vehicle's charging system, responsible for generating electrical power to keep the battery charged and supply all onboard electrical loads—from the engine control unit (ECU), fuel injection system, and cooling fans to the cab heater, work lights, and auxiliary hydraulics.

Manufactured to meet or exceed original equipment (OE) specifications, this alternator features a robust, corrosion-resistant housing, high-quality copper windings, heavy-duty sealed bearings, and a built-in IC voltage regulator. The external fan design ensures superior cooling even under sustained high-output conditions, extending service life in demanding construction and mining environments. Key electrical ratings include a nominal output of 50 Amps at a regulated 24 Volts, which maintains stable voltage and protects sensitive electronic modules such as the common-rail injection controller and CAN bus network.

• OE Quality: Manufactured to strict ISUZU / Mitsubishi OEM dimensional, electrical, and material standards for a perfect, direct-fit replacement—no modifications, adapter brackets, or custom wiring required.
• 24V 50A Commercial-Grade Output: Specifically engineered for the high electrical demands of 6HK1 and 4HK1 engines in medium-duty trucks, heavy excavators, wheel loaders, and crawler cranes.
• External Fan Design for Superior Cooling: High-efficiency external fan provides constant airflow across the alternator housing, dissipating heat even at low engine RPM.
• 3-Groove V-Belt Pulley (3PK): The factory-spec 3-groove V-belt pulley ensures positive, slip-free power transmission on the 6HK1 and 4HK1 accessory drives.
• Internal IC Voltage Regulator (Mitsubishi Type): The built-in, solid-state voltage regulator maintains stable output voltage without the need for external adjustments.
• Heavy-Duty Sealed Bearings: Precision-sealed bearings with high-temperature grease are engineered for 10,000+ operating hours of continuous use.
• Corrosion-Resistant Construction: The alternator housing is coated with a durable, corrosion-resistant finish for long-term reliability.
• Direct Replacement for Multiple OEM Numbers: Fully interchangeable with numerous OE numbers and aftermarket equivalents.
• 12-Month Warranty: Backed by manufacturer batch traceability and comprehensive warranty protection.
• Restores Full Electrical System Performance: Eliminates starting complaints, electrical faults, and intermittent ECU behavior.
• Wholesale Advantage: Perfect for heavy equipment dealers, truck fleet maintenance programs, and parts distributors.

Please verify fitment using your specific chassis number, VIN, engine code, or original part number before ordering.

JCB, Case, Sumitomo, Kobelco, New Holland, Hidromek, Sany, TCM, XCMG, Fiat Kobelco, IHI, Sunward construction equipment with compatible Isuzu engines.

• Material Verification: High-grade copper windings and housing alloy tested to meet JIS/SAE standards
• Dimensional Accuracy: Mounting specifications verified against OE blueprints using CMM equipment
• Electrical Testing - 100% Functional: Each unit computer-tested for output current, regulated voltage, ripple voltage, and excitation circuit function
• Insulation Resistance Test: Stator and rotor windings tested for insulation breakdown
• Bearing & Rotor Balance Test: Rotating assembly dynamically balanced to ISO standards
• Thermal Cycle Test: Sample units subjected to rapid temperature cycling
• Vibration Endurance Test: Simulates real-world operation in heavy equipment
• Salt Spray Test: Housing finish validated for corrosion resistance
• ISO 9001:2015 / IATF 16949 Certified: Facility meets international automotive quality standards
• Visual Inspection: 100% inspected for housing cracks, casting porosity, and terminal damage

• Individual Packaging: Anti-corrosion oil-coated, sealed in moisture-barrier VCI bag with OE-style labeling
• Wholesale / Bulk Orders: Available in case packs (5, 10, 20, 50 units) with pallet pricing for volume orders
• Customization: Neutral or private-label retail packaging available for volume wholesale orders
• Fast Shipping: Ready stock for immediate dispatch worldwide via express courier or sea freight
• Wholesale Support: Long-term supply agreements and tiered commercial pricing for distributors

For pricing, availability, or bulk purchase of the ISUZU 24V 50A Alternator 1812006032 for 6HK1, 4HK1 engines and compatible applications, please contact our sales team for a competitive wholesale quote and expert technical support.