QSB5.9 Camshaft 3942567 for Cummins Engine Parts | Excavator & Loader

Product Details

Product Overview

This high-quality camshaft, identified by OEM part number 3942567, is specifically designed for the Cummins QSB5.9 diesel engine. As a critical component of the engine’s valve train, it precisely controls the opening and closing of intake and exhaust valves, ensuring optimal engine performance, fuel efficiency, and reliability.

Manufactured to meet OEM specifications, this camshaft is a direct replacement for the original part. It is commonly used in a wide range of heavy-duty equipment, including excavators, loaders, bulldozers, forklifts, trucks, and buses that are powered by the Cummins QSB5.9 engine. While this part is designed for the specified engine model, we always recommend verifying compatibility with your specific engine serial number and equipment application before installation.

As a key component from the brand, this camshaft offers a robust and durable solution for engine rebuilds and maintenance, helping to restore engine power and extend service life in demanding working conditions.

Key Features & Benefits

• Precision Engineering: Manufactured to strict OEM tolerances (OEM Size), ensuring a perfect fit and seamless integration with the QSB5.9 engine’s valve train system.
• Durable Construction: Built from high-strength materials to withstand the high stress and rotational forces of continuous heavy-duty operation, reducing wear and extending component life.
• Direct OEM Replacement: Part number 3942567 is a direct cross-reference to the original Cummins part, simplifying the ordering and replacement process for mechanics and fleet managers.
• Restored Engine Performance: A worn camshaft can lead to power loss, poor fuel economy, and rough idling. This new camshaft restores precise valve timing, leading to improved horsepower, torque, and overall engine efficiency.
• Comprehensive Application: Suitable for a wide variety of equipment types, from construction machinery (excavators, loaders, bulldozers) to material handling (forklifts) and on-highway vehicles (trucks, buses).
• Reliable Sourcing: Supplied with a 6-month warranty and backed by a Machinery Test Report and Video Outgoing Inspection, providing confidence in product quality and traceability.

Technical Specifications

OEM Cross-Reference

This camshaft is a direct aftermarket replacement for the following OEM part number(s):

• Cummins Part Number: 3942567

Note: This part is designed to match the specifications of the listed OEM number. For the most accurate fitment, please cross-reference your original part number with the one listed above.

Compatibility

This camshaft is specifically designed and commonly used for the following engine and equipment applications:

• Engine Models: Cummins QSB5.9 (4.5L and 5.9L variants)
• Vehicle/Equipment Applications:
  • Excavators
  • Wheel Loaders
  • Bulldozers
  • Forklifts
  • Medium-duty Trucks
  • Buses
  • Agricultural Tractors
  • Generator Sets

Important Fitment Note: While this camshaft is designed for the Cummins QSB5.9 engine platform, always confirm compatibility by comparing the part number (3942567) with your original camshaft and verifying your engine’s specific serial number and configuration. Variations exist between marine, industrial, and automotive versions of this engine.

Global Supply & Distribution

We are a dedicated supplier of heavy-duty diesel engine parts with a robust global distribution network. Our inventory is strategically located to ensure fast and reliable shipping to major markets worldwide.

• Worldwide Shipping: We offer efficient logistics solutions for international buyers, including air freight, sea freight, and express courier services (DHL, FedEx, UPS, TNT).
• Major Markets Served: We regularly export to North America (USA, Canada, Mexico), Europe (Germany, UK, Netherlands, France), South America (Brazil, Chile, Peru), the Middle East (UAE, Saudi Arabia), Southeast Asia (Indonesia, Thailand, Vietnam), and Africa (Nigeria, South Africa).
• Fast Delivery: Orders are processed within 24 hours, with delivery times typically ranging from 5-10 working days for express shipping to major industrial centers and ports.
• Trade Compliance: We have extensive experience in international trade documentation, including customs clearance and certificate of origin, ensuring a smooth transaction for our B2B partners.

Quality Assurance

Every camshaft we supply undergoes rigorous quality control checks to ensure it meets the high standards required for heavy-duty engine applications.

• Manufacturing Standards: Parts are manufactured in ISO-certified facilities, adhering to strict quality management systems.
• Testing: Each batch is subject to a Machinery Test Report to verify dimensional accuracy and material hardness. A Video Outgoing Inspection is provided upon request, giving you visual confirmation of the product’s condition before shipment.
• Warranty: We stand behind the quality of our parts with a 6-month warranty against manufacturing defects in materials and workmanship.
• Traceability: All parts are clearly packaged and labeled with part numbers and batch codes for full traceability.

FAQ

Q: Is this camshaft a direct replacement for the original Cummins 3942567 part?
A: Yes, this camshaft is designed as a direct aftermarket replacement for the OEM Cummins part number 3942567. It is manufactured to the same OEM size and specifications, ensuring a proper fit and function in the QSB5.9 engine. We always recommend comparing the part number with your original component to confirm compatibility.

Q: What are the common symptoms of a failing camshaft in a QSB5.9 engine?
A: Common signs include a loss of engine power, increased fuel consumption, rough idling, a ticking or knocking noise from the valve train, and potential backfiring. If you experience these issues, inspecting the camshaft and associated lifters is a critical step in the diagnostic process. Replacing a worn camshaft with a quality part like this one will restore proper engine timing and performance.

Q: What is the recommended installation procedure for this camshaft?
A: Installation should be performed by a qualified diesel mechanic. The procedure generally involves draining the engine oil, removing the front timing cover, timing gear, and rocker arms, then carefully sliding the old camshaft out and replacing it with the new one. It is critical to properly lubricate the camshaft journals and lobes with clean engine oil or assembly lube before installation. The engine timing must be precisely set according to the Cummins QSB5.9 service manual. We recommend replacing the camshaft bearings and lifters simultaneously for optimal performance and longevity.