Alternator 24V 55A 12PK for Mitsubishi S6E Engine | E320D | 34468-25100 212-8561

Product Details

Product Overview

This high-output alternator is specifically designed for Mitsubishi S6E diesel engines, commonly used in heavy-duty excavators like the Caterpillar E320D. As a critical component of the engine’s electrical charging system, this 24-volt, 55-amp unit ensures reliable power generation for starting batteries and onboard electronics in demanding construction and industrial environments.

Engineered to meet OEM specifications, this alternator carries the part numbers 34468-25100 and 212-8561, providing a direct replacement for worn or failed units. It features a 12PK (12-groove) serpentine belt pulley for efficient power transmission and stable charging output.

Key Features & Benefits

• OEM-Spec Output: Delivers 24V at 55 amps, meeting the exact electrical demands of Mitsubishi S6E-powered machinery.
• Direct Fit Replacement: Designed to match OEM dimensions and mounting points for easy installation with no modifications required.
• 12PK Serpentine Pulley: Provides superior belt grip and reduced slippage compared to multi-rib or V-belt designs, ensuring consistent charging even under heavy load.
• Durable Construction: Built with heavy-duty components to withstand vibration, heat, and contaminants common in construction and mining sites.
• Enhanced Reliability: Voltage regulator and rectifier are protected against overvoltage and reverse polarity, extending service life.
• Cost-Effective Alternative: Offers significant savings over dealer-purchased OEM units while maintaining equivalent performance and fitment.

Technical Specifications

OEM Cross-Reference

This alternator is a direct cross-reference for the following OEM part numbers:

• 34468-25100 (Mitsubishi / Caterpillar)
• 212-8561 (Caterpillar)
• 2128561 (Caterpillar, alternative format)

Always verify your existing part number and application before ordering. This alternator is designed as a direct replacement for the listed OEM numbers on compatible engine platforms.

Compatibility

This alternator is commonly used for the following applications:

• Engine: Mitsubishi S6E (6-cylinder diesel engine)
• Excavator: Caterpillar E320D (and variants including 320D, 320DL, 320D LRR)
• Other Equipment: Industrial generators, agricultural tractors, and marine auxiliary engines powered by the Mitsubishi S6E platform

Note: Fitment is based on engine model and alternator mounting configuration. Always cross-reference your existing alternator’s part number and physical dimensions prior to purchase to ensure compatibility.

Global Supply & Distribution

We ship this alternator worldwide from our distribution centers in Guangdong, China, and maintain stock in regional warehouses to ensure fast delivery. Our logistics network covers all major international markets, including:

• North America: Expedited shipping to the USA, Canada, and Mexico via air and sea freight.
• Europe: Fast delivery to EU countries including Germany, France, the Netherlands, and the UK.
• Asia-Pacific: Direct shipping to Australia, New Zealand, Japan, South Korea, and Southeast Asian markets.
• Middle East & Africa: Reliable delivery to UAE, Saudi Arabia, Qatar, South Africa, and key African ports.
• Latin America: Service to Brazil, Chile, Peru, and Argentina.

We offer flexible shipping options including express courier (DHL, FedEx, UPS), air freight, and sea freight for bulk orders. Customs clearance support and proper export documentation (commercial invoice, packing list, certificate of origin) are provided with every international shipment.

Quality Assurance

• Manufacturing Standards: Produced in ISO 9001-certified facilities with strict quality control processes.
• Testing: Each alternator undergoes outgoing inspection including voltage output, current draw, and pulley runout testing. Machinery test reports are available upon request.
• Video Inspection: We can provide video evidence of testing and condition prior to shipment for added confidence.
• Warranty: Backed by a 6-month warranty against manufacturing defects in materials and workmanship.
• OEM Service: OEM/ODM manufacturing available for volume buyers with custom branding or packaging requirements.

FAQ

Q: Will this alternator fit my Caterpillar 320D excavator with a Mitsubishi S6E engine?
A: This alternator is designed specifically for Mitsubishi S6E engines, which power many Caterpillar 320D series excavators. However, we strongly recommend verifying your existing part number (34468-25100 or 212-8561) and the physical mounting pattern before ordering. Variations in pulley size, mounting bracket, or voltage regulator type may exist between different machine serial number ranges.

Q: What is the recommended installation procedure?
A: Installation should be performed by a qualified technician. Key steps include: (1) Disconnect the battery negative terminal. (2) Remove the belt from the pulley. (3) Unbolt the old alternator and disconnect the wiring harness. (4) Install the new alternator in reverse order, ensuring the 12PK belt is properly tensioned to manufacturer specifications. Torque mounting bolts to OEM values. Reconnect battery and test charging voltage (should be approximately 28.0V at idle).

Q: How should I maintain this alternator for optimal performance?
A: Regularly inspect the serpentine belt for wear, cracking, or glazing and replace as needed. Ensure the alternator mounting bolts remain tight. Keep the alternator housing clean and free from debris, oil, and moisture. Periodically check the charging voltage at the battery terminals (target: 27.5-28.5V at operating temperature). If the battery warning light illuminates or charging voltage drops below 26V, have the alternator and wiring system inspected immediately.