QSB4.5 Crankshaft for Cummins Engine Parts – Excavator, Truck, Loader

Product Details

Product Overview

This high-quality QSB4.5 Crankshaft is specifically designed for use in Cummins engine parts applications, providing reliable performance for heavy-duty machinery. Manufactured to OEM specifications, this crankshaft ensures a precise fit and optimal function in diesel engines commonly found in excavators, trucks, loaders, forklifts, bulldozers, and buses.

Engineered for durability and longevity, the brand crankshaft undergoes rigorous quality control to meet the demanding needs of B2B buyers in construction, mining, and logistics sectors. Whether replacing a worn component or building a new engine, this QSB4.5 crankshaft delivers the rotational strength and balance required for continuous operation under high stress.

With a weight of 25 kg and manufactured in Guangdong, China, this part is ready for international distribution to major markets worldwide. Ensure your Cummins engine maintains peak performance with this OEM-size replacement crankshaft.

Key Features & Benefits

• Precision OEM Fit: Manufactured to original equipment manufacturer specifications for the QSB4.5 engine, guaranteeing seamless installation and compatibility.
• Heavy-Duty Construction: Robust design withstands extreme loads and high RPMs typical in excavator and truck applications, reducing downtime and maintenance costs.
• Material Quality: Made from high-strength alloy steel with heat treatment for enhanced wear resistance and fatigue life.
• Balanced Performance: Dynamic balancing ensures smooth engine operation, minimizing vibration and extending bearing life.
• Comprehensive Testing: Each unit comes with a Machinery Test Report and Video Outgoing Inspection, providing full traceability and quality assurance.
• Versatile Application: Suitable for a wide range of equipment including forklifts, excavators, trucks, loaders, bulldozers, and buses, making it a flexible inventory choice for distributors.

Technical Specifications

OEM Cross-Reference

This QSB4.5 crankshaft is designed as a direct replacement for OEM Cummins parts. While the specific OEM part number may vary by application, it is commonly referenced under the following numbers:

• Cummins OEM: 3968493, 3968494, 3970815 (verify with your engine serial number)
• Alternative Numbers: Consult your Cummins parts catalog for exact cross-reference to QSB4.5 engine configurations.

Note: Always verify compatibility with your specific engine model and serial number before ordering.

Compatibility

This crankshaft is commonly used for the following applications:

• Engine Models: Cummins QSB4.5 (all variants including QSB4.5-T, QSB4.5-C)
• Vehicle/Equipment Types: Forklift, Excavator, Truck, Loader, Bulldozer, Bus, and other industrial diesel equipment

Typical machinery brands that utilize QSB4.5 engines include Caterpillar, Komatsu, Hitachi, John Deere, and various Chinese OEM manufacturers. This part is not limited to any single brand and fits any equipment powered by the Cummins QSB4.5 diesel engine.

Global Supply & Distribution

We offer worldwide shipping capabilities to serve B2B buyers across all major industrial markets. Our distribution network covers:

• North America: Fast delivery to ports in Los Angeles, Houston, New York, and Vancouver.
• Europe: Efficient shipping to Rotterdam, Hamburg, Antwerp, and major inland industrial centers.
• Asia-Pacific: Direct supply to Singapore, Shanghai, Tokyo, Sydney, and Dubai.
• Middle East & Africa: Reliable service to Jebel Ali, Jeddah, Durban, and Lagos.
• Latin America: Coverage for Santos, Buenos Aires, and Panama.

With years of export experience, we ensure proper documentation, customs clearance support, and competitive freight rates. Bulk orders and dropshipping arrangements are welcome for qualified distributors.

Quality Assurance

Every QSB4.5 crankshaft is manufactured in ISO-certified facilities in Guangdong, China, adhering to strict international quality standards. Our quality control process includes:

• Material Certification: All steel is sourced from approved mills with full traceability.
• Dimensional Inspection: Each crankshaft is checked against OEM blueprints using CMM (Coordinate Measuring Machine) equipment.
• Dynamic Balancing: Ensures rotational stability within OEM tolerance limits.
• Surface Hardness Testing: Verifies journal hardness meets or exceeds factory specs.
• Video Inspection: A video outgoing inspection is provided upon request for full transparency.
• Warranty: 6-month warranty against manufacturing defects, with responsive after-sales support.

FAQ

Q1: How do I confirm this crankshaft fits my specific Cummins QSB4.5 engine?
A: Verify your engine’s serial number and compare it with our OEM cross-reference numbers. For best results, measure the main bearing journal diameter (typically 80mm for QSB4.5) and rod journal diameter (typically 60mm). If you are unsure, please provide your engine model and serial number, and we can confirm compatibility before shipping.

Q2: What maintenance is recommended after installing a new crankshaft?
A: After installation, perform a break-in period of 50 hours with light to moderate loads. Use high-quality diesel engine oil (API CI-4 or higher) and change the oil and filter after the break-in. Check main bearing and rod bearing clearances with plastigauge during installation to ensure proper oil film thickness. Regularly inspect for unusual vibrations or noises during the first 500 hours of operation.

Q3: Can this crankshaft be used in high-performance or modified QSB4.5 engines?
A: This crankshaft is manufactured to OEM specifications and is suitable for standard and moderate-duty applications. For high-performance builds (e.g., increased turbo boost, higher RPM limits), we recommend consulting with a Cummins specialist to verify if upgraded materials or different balancing specifications are required. Our standard crankshaft is optimized for reliability in stock configurations used in excavators and trucks.