55SI 24V 275A Heavy Duty Alternator – OE-Quality Replacement for 61006083 / 8600434

Designed for Heavy-Duty Fleets, Distributors, and OEM Buyers

This 55SI 24V 275A heavy duty alternator is engineered to meet the demands of professional buyers operating in high-load, mission-critical environments.

• Wholesale distributors requiring stable production, consistent specifications, and predictable inventory for 55SI alternator replacement markets

• Fleet maintenance teams seeking OE-level reliability and long service life in 24V systems while maintaining cost control

• Heavy-duty repair workshops supporting trucks, buses, mining, and construction equipment where high-output 275A performance is essential

• OEM and project buyers needing custom mounting options, terminals, voltage regulation, or private labeling for integrated applications

• Tender and government procurement programs requiring full documentation, traceability, and compliance support

Key Advantages of Delco Remy 55SI 24V 275A Heavy Duty Alternator

OE-Level Replacement Accuracy

Engineered as a direct-fit replacement for Delco Remy 55SI alternators, this unit precisely matches OEM mounting dimensions, standard 80 mm pad configuration, electrical terminals, and output characteristics. It enables straightforward installation with no modification required, reducing downtime for fleets and workshops.

High Output 24V / 275A Performance

Designed to deliver stable, high-amperage output in 24-volt systems, this alternator reliably supports demanding electrical loads, including HVAC systems, engine cooling fans, lighting, battery charging banks, telematics, control modules, and auxiliary equipment commonly used in heavy-duty trucks, buses, and industrial machinery.

Brushless Design for Continuous Duty

The brushless 55SI architecture minimizes wear components and maintenance requirements while providing consistent voltage regulation under continuous operation, high-load cycles, and extended idling. This design is ideal for commercial and industrial environments where uptime is critical.

Heavy-Duty Internal Components

Built with high-purity copper windings, oversized rectifier assembly, sealed heavy-duty bearings, a reinforced aluminum housing, and a dynamically balanced rotor, ensuring durability, reduced vibration, and consistent output under harsh operating conditions.

100% End-of-Line Performance Testing

Every alternator is subjected to full functional and load testing, including rated output verification, voltage regulation accuracy, thermal stability, and electrical performance validation. This ensures consistent OE-level quality and dependable performance before shipment for B2B distribution and project supply.

Technical Specifications of the WB2456 / 55SI High-Output Alternator

Cross-Reference Compatibility for Delco Remy 55SI Applications

Applications of Equipment Using 55SI-Type Alternators 

Heavy-duty trucks

Construction machinery

Agricultural tractors and harvesters

Buses and transport vehicles

Mining and off-road machinery

Power generation auxiliary systems

Elecdurauto OE-Level Manufacturing for Heavy-Duty Water-Cooled Alternators

CNC Machining Center

Precision machining for water-cooled housings and end covers to ensure perfect fitment, stable structure, and OE-level heat dissipation.

Automatic Stator Winding Machine

Automated winding and inserting systems deliver consistent copper density, insulation stability, and long-life electrical performance.

Rotor Dynamic Balancing Machine

High-precision balancing ensures smooth rotation, reduced vibration, and reliable performance under high-RPM duty cycles.

Torque-Controlled Assembly Line

Semi-automatic stations with torque control & poka-yoke guarantee fastening accuracy and consistent assembly quality.

Alternator Performance Test Bench (100% Final Test)

Every alternator is tested for output current, voltage regulation, rectifier integrity, and electrical safety before packaging.

High-Temperature & Endurance Test Chamber

Thermal cycling and full-load endurance tests validate heat resistance and long-term durability in heavy-duty applications.

Quality Assurance & Testing (OE-Grade Replacement Standards)

Every 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.

Why Distributors and OEM Buyers Choose Elecdurauto as Their Alternator Partner

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

OEM Project Case from Elecdurauto Water-Cooled Alternator Supplier for Global Heavy-Duty Brands

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.

Water-Cooled Alternator Assembly

Stator Coil Precision Winding

Finished Heavy-Duty Alternator

OEM Packaging & Inventory

Bulk Export-Ready Stock

Rotor & Fan Subassembly

High-Output Alternator Housing

Cooling-Enhanced Rear Cover

Elecdurauto Core Advantages for Replacement Alternators

1. Exclusive Products – Unique in Global Markets

Certain alternator models and assemblies are exclusively developed by Elecdurauto and unavailable from other factories.

2. Fast Response – Inquiries Answered Within 24 Hours

I ensure fast communication to support your purchasing schedule and project decisions.

3. Custom Tooling – Rapid New Product Development

I support OEM/ODM development, custom tooling, label customization, and new-model prototyping.

4. Pricing Advantage – Lowest Global Pricing for Many SKUs

New SKUs are launched at highly competitive prices, and many existing models remain the lowest-cost option worldwide.

Buyer Protection, Warranty, and Global Supply Support

• 18-month warranty

• Pre-shipment photos and videos

• Serial number tracking

• Replacement for QC-approved claims

• Support for third-party inspection (SGS, TUV, BV)

Frequently Asked Questions – 55SI 24V 275A Heavy-Duty Alternator 

1. What vehicles and equipment are compatible with the 55SI 24V 275A alternator？

This alternator is designed for heavy-duty trucks, buses, construction machinery, and commercial diesel engines. It fits applications requiring high-current 24V output and is compatible with OEM references 61006083, 8600434, 8600480, 240-4160, and 7314.

2. Can this alternator be a direct replacement for Delco Remy 55SI models？

Yes. The WB2456 55SI alternator is engineered as a direct-fit replacement, matching original pad mount dimensions, electrical terminals, and performance characteristics. No modifications are required during installation.

3. What are the key electrical specifications of this alternator?

• Voltage: 24V

• Rated Output: 275A

• Regulator: Internal with Remote Sense

• Rotation: Clockwise (viewed from pulley side)

• Output Terminal: B+ Stud
  This ensures stable high-amperage supply for onboard electronics, battery charging, HVAC systems, and auxiliary equipment.

4. How does the 55SI alternator handle continuous-duty operation?

The alternator features brushless design, air-cooled architecture, and heavy-duty internal components (high-purity copper windings, oversized rectifier, sealed bearings). These design elements maintain stable voltage, minimal vibration, and controlled temperatures during extended high-load cycles, ideal for commercial fleets and industrial use.

5. Are there OEM or aftermarket cross-reference numbers available?

Yes. The alternator is cross-referenced with:

• Delco Remy: 61006083, 8600434, 8600480

• Aftermarket: 240-4160, 7314

• Internal Program Code: WB2456

• Series: 55SI Air-Cooled Brushless Alternator Series
  This allows easy compatibility checking for B2B buyers and fleet maintenance teams.

6. What mounting and installation features does it have?

• Mounting Type: Standard Pad Mount

• Pad Width: 80 mm

• Installation: Direct replacement, no modifications required
  It is suitable for heavy-duty workshop installation, ensuring minimal downtime.

7. Is this alternator suitable for international B2B supply?

Yes. The WB2456 55SI alternator supports bulk orders, OEM projects, and global distribution, with packaging and documentation suitable for international shipping and customs compliance.

8. What certifications or quality assurance measures are included?

Each alternator undergoes 100% end-of-line performance testing, including full-load output verification, voltage regulation accuracy, vibration resistance, and thermal stability. OEM-level quality ensures reliable operation in high-demand commercial environments.

9. Can this alternator support tender, government, or project procurement requirements?

Yes. Documentation for certification, traceability, and compliance can be provided to satisfy tender specifications, fleet procurement standards, and government project requirements, supporting B2B bulk supply and OEM contracts.

10. How should fleet operators or workshops maintain the WB2456 55SI alternator?

Regular inspection of mounting, terminals, and wiring is recommended. The brushless and sealed design reduces maintenance frequency, but fleets should ensure proper belt tension and ambient cooling to maximize service life. OEM replacement parts are available globally to support long-term operation and uptime.