CAT Alternator – Product Overview
An alternator converts mechanical energy from the engine into electrical energy to charge the battery and power the electrical systems of the equipment. It is a critical component for reliable machine operation, especially for modern electronically controlled engines.
Applications
This Alternator is designed for CAT construction equipment and industrial engines. It is compatible with a wide range of machine models and engine configurations. The component is manufactured to meet or exceed original equipment specifications for reliable performance in demanding operating conditions.
Compatible OEM Part Numbers
We supply the following comprehensive list of CAT Alternator part numbers. These part numbers cover various machine models, engine configurations, and design revisions:
- Primary Part Number: 121-4134 Alternator
- Also Available: 215-7133 Alternator
- Also Available: 266-7225 Alternator
- Also Available: ALTERNATOR 4246821
- Also Available: Alternator 197-8820
- Also Available: Alternator 339-7767
- Also Available: Alternator 561-3002
- Also Available: Alternator 561-3002 (2)
If your specific part number is not listed, please contact our sales team with your machine model and serial number. We can source most part numbers with short lead times.
Technical Specifications
- Product Type: Brushless / Brushed Alternator
- Voltage: 24V / 12V (depending on application)
- Output: 50A – 150A (depending on model)
- Regulator: Built-in electronic voltage regulator
- Quality: OEM specification or premium aftermarket
Installation Guide
- Ensure the machine is on level ground, engine off, and all systems are safely depressurized before starting work.
- Clean the area around the component thoroughly to prevent contamination during removal and installation.
- Refer to the manufacturer service manual for the specific removal and installation procedure.
- Use proper tools and lifting equipment as specified in the service manual.
- Replace all gaskets, seals, and O-rings with new ones during installation.
- Tighten all fasteners to the manufacturer’s specified torque values using a calibrated torque wrench.
- After installation, check for proper operation and leaks before returning the machine to service.
- Perform a test run at low speed and gradually increase to normal operating speed.
Price Range
$150 – $800 USD per unit (depending on output rating and brand)
Volume discounts are available for fleet operators and repair shops. Contact our sales team for a firm quote based on your specific part number and quantity requirements.
Maintenance Tips
- Check belt tension and condition regularly.
- Inspect electrical connections for corrosion or loose terminals.
- Monitor charging voltage – should be 27.5-28.5V for 24V systems.
- Keep alternator clean and free of oil and debris.
- Check alternator bearings for noise during operation.
- Test output current during scheduled maintenance.
Warranty
All products supplied by us are covered by a 12-month warranty against manufacturing defects in materials and workmanship. The warranty covers replacement or repair at our discretion. Proper installation by a qualified technician and adherence to the recommended maintenance schedule are required for warranty validity.
Shipping and Delivery
In-stock items ship within 24-48 hours via express freight (DHL, FedEx, or UPS). Standard delivery time is 5-10 business days worldwide. Expedited shipping options are available upon request. All shipments are fully insured and include tracking information.
Why Choose Our Products?
- Direct OEM replacement with guaranteed fitment and performance
- Rigorous quality testing before shipment
- Competitive pricing with factory-direct supply chain
- Technical support available for installation and troubleshooting
- Proven reliability with thousands of units supplied worldwide
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