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As a leading manufacturer and supplier of heavy-duty alternators, we proudly present the 55SI New Alternator (Model 8600473). Designed for industrial and commercial vehicles, this 12V 430A alternator with standard 80mm pad delivers reliable performance under extreme operating conditions. Ideal for fleet operators, distributors, and OEM projects, it ensures continuous power supply for demanding applications.
61006081 / 8600580 / 8600557 / 240-4169
Elecdurauto
China
IATF 16949 / ISO 9001 / CE / RoHS
OEM label and ODM customization accepted
1 pcs
7–15 Days
50,000 pcs / month
Individual box / 4-pack set / bulk tray / custom label
18 months
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Product Description
OE-Level Replacement: Direct-fit compatibility with Delco Remy 55SI, ensuring identical mounting and matched electrical characteristics for hassle-free installation.
High Output 12V / 430A: Supports HVAC, electric fans, hydraulic systems, lighting, telematics, and auxiliary tools, delivering reliable power under heavy-duty conditions.
Advanced Water-Cooled System: Maintains optimal operating temperature during high load or long idle periods, improving efficiency and extending alternator life.
Durable Components: Features heat-resistant copper windings, oversized rectifier, sealed bearings, high-strength aluminum housing, and dynamically balanced rotor for maximum reliability.
100% End-of-Line Tested: Each unit undergoes full-load output, voltage regulation, vibration resistance, thermal stability, and cooling performance tests to guarantee consistent quality.
OE-Level Replacement: Direct-fit compatibility with 55SI series alternators, featuring identical mounting and matched electrical characteristics for seamless integration into trucks, buses, and industrial machinery.
High Output 12V / 430A: Provides robust power for HVAC systems, electric fans, lighting, telematics, and auxiliary equipment, ensuring stable operation under high-load conditions.
Durable Construction: Equipped with heat-resistant copper windings, oversized rectifier, sealed bearings, high-strength aluminum housing, and a dynamically balanced rotor for long service life.
Efficient Cooling System: Standard pad cooling and ventilation maintain optimal operating temperature, improving reliability during extended operation or idle periods.
100% End-of-Line Tested: Each unit undergoes full-load output, voltage regulation, vibration resistance, thermal stability, and performance verification before shipment.
| Specification | Details |
|---|---|
| Model | 8600473 |
| Type | 55SI New Heavy-Duty Alternator |
| Voltage | 12V |
| Output | 430A |
| Cooling | Air-Cooled / Standard Pad (80MM) |
| Mounting | Standard Pad (80MM) |
| Regulator | Internal |
| Rotation | Clockwise (from pulley side) |
| Output Terminal | B+ Stud |
| Housing Material | Aluminum Alloy |
| Operating Environment | Heavy-duty / High-load |
| Brand | Part Number / Equivalent |
|---|---|
| Delco Remy | 8600473 |
| Delco Remy | 240-4163 |
| Delco Remy | 12V 430A 55SI Series |
| OEM / Equivalent | 55SI Heavy-Duty Series |
| Industrial / Fleet | Standard Pad 80MM Alternators |
Precision machining for water-cooled housings and end covers to ensure perfect fitment, stable structure, and OE-level heat dissipation.
High-precision balancing ensures smooth rotation, reduced vibration, and reliable performance under high-RPM duty cycles.
Semi-automatic stations with torque control & poka-yoke guarantee fastening accuracy and consistent assembly quality.
Every alternator is tested for output current, voltage regulation, rectifier integrity, and electrical safety before packaging.
Thermal cycling and full-load endurance tests validate heat resistance and long-term durability in heavy-duty applications.
Every water-cooled alternator undergoes:
100% output performance test
Voltage regulation test
High-temperature resistance test
Vibration and durability test
Rotor/stator electrical integrity testing
Noise & bearing inspection
Full load endurance test
All tests follow IATF 16949 quality-management requirements.
This model is one of the most widely used heavy-duty alternators in commercial fleets. Mechanics and distributors choose this Elecdurauto replacement because:
It is easier to source and more cost-effective than OEM units
Output performance meets or exceeds OE charging specifications
Installation is plug-and-play with matching connectors and mount
It withstands long idling hours, high temperatures, and vibration
Lower total cost of ownership for fleets and service centers
At Elecdurauto, I deliver more than just heavy-duty alternators—I provide full-cycle engineering and supply solutions built around each OEM customer's exact platform requirements. As a trusted global supplier specializing in water-cooled alternators for buses, construction machinery, mining vehicles, and high-load commercial platforms, I work closely with manufacturers to ensure every unit aligns with their electrical, thermal, and durability standards.
Certain alternator models and assemblies are exclusively developed by Elecdurauto and unavailable from other factories.
I ensure fast communication to support your purchasing schedule and project decisions.
I support OEM/ODM development, custom tooling, label customization, and new-model prototyping.
New SKUs are launched at highly competitive prices, and many existing models remain the lowest-cost option worldwide.
18-month warranty
Pre-shipment photos and videos
Serial number tracking
Replacement for QC-approved claims
Support for third-party inspection (SGS, TUV, BV)
Yes. This alternator is designed as a direct-fit replacement for Delco Remy 55SI-style units with a standard 80MM pad. It matches OEM mounting and electrical characteristics, making it compatible with trucks, buses, and heavy-duty industrial vehicles worldwide.
The 8600473 alternator provides 12V and 430A, delivering high output to support lighting, HVAC systems, electric fans, telematics, and auxiliary equipment in demanding environments.
Absolutely. Built with durable components such as heat-resistant copper windings, oversized rectifier, sealed bearings, and a high-strength aluminum housing, it is designed for heavy-duty applications and long idle periods. The standard pad ventilation ensures efficient cooling even under continuous high-load operation.
We provide a 24-month factory warranty for all 55SI New Alternators. Our global technical support team is available to guide installation, troubleshoot issues, and ensure your fleet experiences minimal downtime.
The 8600473 is compatible with OEM and industrial equivalents, including Delco Remy 240-4163 and other 55SI heavy-duty alternators. We can provide a full cross-reference list upon request to help you identify the correct replacement for your vehicles.
Yes. We support bulk orders and OEM supply with competitive pricing, factory-direct shipping, and worldwide delivery. Our sales team can provide FOB/CIF quotations and help arrange logistics to your location.
Our 55SI New Alternator is trusted by fleets and distributors in North America, Europe, Africa, South America, and Asia, especially in applications requiring reliable heavy-duty power, such as long-haul trucks, city buses, and construction equipment.
Installation is straightforward for trained technicians. For global customers, we provide installation guidance and technical documentation, ensuring correct fitment and minimizing operational risks.
The 8600473 meets or exceeds OEM specifications, providing equivalent or higher output, superior cooling, and extended durability. Each unit is 100% end-of-line tested for voltage regulation, vibration resistance, and thermal stability, ensuring reliable performance in heavy-duty applications.
Minimal maintenance is required. Regular inspection of connections, belts, and cooling vents is recommended to ensure optimal performance. The durable construction reduces wear and prolongs operational life compared to standard alternators.
