B3.9-p Crankshaft 3929036 for Cummins Engines Repair Parts

Product Details

Product Overview

This high-quality Cummins B3.9 Crankshaft (Part Number: 3929036) is a precision-engineered replacement component designed for the Cummins B3.9 diesel engine platform. Manufactured to meet OEM specifications, this crankshaft is a critical rotating assembly part that converts linear piston motion into rotational power, ensuring smooth and reliable engine operation.

Commonly used in heavy-duty applications including excavators, trucks, forklifts, bulldozers, buses, and loaders, this 3929036 crankshaft is a direct-fit replacement for engines requiring a standard OEM-size component. As a new, non-remanufactured part, it provides maximum service life and performance for your Cummins B3.9 diesel engine rebuild or repair project.

Key Features & Benefits

• Precision OEM Fitment: Machined to exact OEM dimensions (Size: OEM Size) for a direct, hassle-free installation into Cummins B3.9 engine blocks without modification.
• Superior Durability: Manufactured from high-strength alloy steel with induction-hardened journals and fillet rolling for increased fatigue resistance and long-term reliability under heavy loads.
• Strict Quality Control: Undergoes rigorous dimensional inspection and magnetic particle testing to ensure structural integrity and balance, verified by a provided Machinery Test Report.
• New Construction: Brand new, not remanufactured or used, eliminating the risk of hidden wear or prior fatigue damage common with recycled parts.
• Versatile Application: Suitable for a wide range of equipment types including excavators, trucks, forklifts, and industrial machinery powered by the Cummins B3.9 engine.
• Competitive Value: Offers the lowest price advantage in the market without compromising on quality, making it an excellent choice for cost-conscious fleet managers and repair shops.

Technical Specifications

OEM Cross-Reference

This crankshaft (Part Number: 3929036) is cross-referenced with the following OEM and alternative part numbers. Please verify your specific engine application before purchasing.

• Primary OEM Number: 3929036
• Alternative / Supersession Number: 3939261

Note: Always confirm the part number stamped on your existing crankshaft or consult your engine manual for compatibility.

Compatibility

This crankshaft is specifically designed for the Cummins B3.9 diesel engine platform. It is commonly used for the following equipment applications:

• Excavators
• Trucks (Medium Duty)
• Forklifts
• Bulldozers
• Buses
• Loaders & Other Heavy Machinery

Global Supply & Distribution

As a premier supplier of aftermarket diesel engine components, we operate a robust global distribution network capable of serving B2B clients worldwide. Our logistics team ensures fast, reliable shipping to major industrial centers across:

• North America: Los Angeles, Houston, Chicago, Toronto
• Europe: Rotterdam, Hamburg, Antwerp
• Asia-Pacific: Singapore, Shanghai, Sydney, Dubai
• Middle East & Africa: Jebel Ali, Durban, Lagos

We offer flexible shipping options including sea freight (FOB/CIF), air express (DHL/FedEx/UPS), and rail freight for landlocked regions. Our export documentation is fully compliant with international trade standards, ensuring smooth customs clearance.

Quality Assurance

Our manufacturing facility adheres to strict quality management systems. Each crankshaft undergoes a multi-stage inspection process:

• Material Certification: All raw materials are tested for chemical composition and mechanical properties.
• Dimensional Accuracy: Main journals and pin journals are measured to micron-level tolerances.
• Non-Destructive Testing: Magnetic particle inspection (MPI) is performed to detect surface cracks.
• Dynamic Balancing: Each crankshaft is dynamically balanced to minimize vibration during operation.

We provide a 6-month warranty against manufacturing defects. A Machinery Test Report is available upon request for verification of quality standards.

FAQ

Q1: Is this crankshaft a direct replacement for my Cummins B3.9 engine?
Yes, this 3929036 crankshaft is manufactured to OEM standard dimensions for the Cummins B3.9 engine. It should fit directly without modifications. However, we recommend comparing the part number stamped on your existing crankshaft with the number provided to ensure 100% compatibility, as engine variants may exist.

Q2: What is the recommended installation procedure for this crankshaft?
Installation should be performed by a qualified diesel mechanic. Key steps include: clean the engine block thoroughly, install new main bearings with proper lubrication, carefully lower the crankshaft into place, torque main bearing caps to the manufacturer’s specifications in the correct sequence, and verify end-play clearance. Always use new bolts and seals during installation.

Q3: How does this aftermarket part compare to a genuine Cummins crankshaft?
This aftermarket crankshaft is manufactured using equivalent materials and processes to meet OEM specifications. It offers the same dimensional accuracy and durability as a genuine part but at a significantly lower price point. It is fully tested and carries a 6-month warranty, providing a reliable and cost-effective alternative for engine rebuilds.