Camshaft 3966430 3976620 for Cummins 6L 6LT Engine | Excavator Truck Parts

Product Details

Product Overview

This high-quality camshaft, identified by part numbers 3966430 and 3976620, is specifically designed for the Cummins 6L and 6LT diesel engine platforms. As a critical component of the valve train, this camshaft precisely controls the opening and closing of intake and exhaust valves, ensuring optimal engine timing, fuel efficiency, and power output.

Manufactured to OEM specifications, this camshaft is an ideal replacement for heavy-duty applications. It is commonly used in a variety of construction and industrial machinery, including excavators, bulldozers, loaders, forklifts, and trucks. Whether you are servicing a fleet of earthmoving equipment or performing a major engine overhaul, this part provides the reliability and performance required for demanding job sites.

Key Features & Benefits

• Precision Engineering: Manufactured to match the exact geometry and lobe profiles of the original Cummins 6L/6LT camshaft, ensuring proper valve timing and engine synchronization.
• Durable Construction: Made from high-grade alloy steel with hardened lobes and bearing journals, providing excellent wear resistance and long service life under high-stress conditions.
• Direct Fit Replacement: Designed as a direct bolt-in replacement for part numbers 3966430 and 3976620, minimizing installation time and reducing downtime for your equipment.
• Rigorous Quality Control: Each camshaft undergoes strict dimensional inspection and hardness testing to ensure it meets or exceeds OEM standards.
• Versatile Application: Suitable for a wide range of equipment including excavators, trucks, loaders, bulldozers, forklifts, and buses, making it a versatile stock item for parts distributors.
• Cost-Effective Solution: Offers a reliable alternative to expensive dealer parts without compromising on quality or engine performance.

Technical Specifications

OEM Cross-Reference

This camshaft is a direct replacement for the following OEM part numbers:

• Cummins: 3966430, 3976620

Note: Always verify your engine serial number and existing part number to confirm compatibility before purchase. These cross-references are provided as a guide based on common industry applications.

Compatibility

This camshaft is commonly used for the following engine models and applications:

• Engine Models: Cummins 6L, Cummins 6LT
• Vehicle/Equipment Applications: Excavators, Bulldozers, Loaders, Forklifts, Trucks, Buses, and other heavy construction machinery

Global Supply & Distribution

We maintain a robust global supply chain to serve B2B customers in major industrial markets worldwide. Our export capabilities include:

• North America: Fast shipping to ports in Los Angeles, Houston, New York, and Vancouver.
• Europe: Reliable delivery to Rotterdam, Hamburg, Antwerp, and Felixstowe.
• Asia-Pacific: Efficient logistics to Singapore, Sydney, Shanghai, and Dubai.
• Middle East & Africa: Regular shipments to Jebel Ali, Dammam, and Durban.

We offer flexible shipping options including sea freight, air freight, and express courier services. Our export team ensures all documentation, including commercial invoices, packing lists, and certificates of origin, are properly prepared for smooth customs clearance. We welcome OEM/ODM inquiries and bulk orders.

Quality Assurance

• Manufacturing Standards: Produced in a facility that adheres to strict quality management systems, ensuring consistent product quality.
• Testing: Each camshaft is subject to a machinery test report and video outgoing inspection to verify dimensional accuracy, surface hardness, and lobe profile.
• Warranty: Backed by a 6-month warranty against manufacturing defects, providing peace of mind for your purchase.
• Certification: Our products are designed to meet or exceed industry standards for heavy-duty diesel engine components.

FAQ

Q: Is this camshaft a direct fit for my Cummins 6LT engine?
A: This camshaft (3966430/3976620) is designed as a direct replacement for the Cummins 6L and 6LT engine series. However, we strongly recommend comparing your existing part number and engine serial number to ensure exact compatibility, as there may be variations in different engine builds or model years.

Q: What is the recommended installation procedure for this camshaft?
A: Installation should be performed by a qualified diesel mechanic. Key steps include: 1) Ensuring the engine is at top dead center (TDC) for cylinder #1. 2) Lubricating the camshaft journals and lobes with clean engine oil before installation. 3) Torquing the camshaft bearing caps to the manufacturer’s specifications in the correct sequence. 4) Re-timing the injection pump if necessary. Always consult the engine service manual for your specific model.

Q: How do I verify the quality of this camshaft before installation?
A: We recommend visually inspecting the camshaft for any shipping damage. You can also measure the lobe lift and journal diameters with a micrometer to confirm they match OEM specifications. If you require it, we can provide the machinery test report and video inspection documentation for your batch upon request before shipment.