Forged Steel C7 Crankshaft 271-5657 222-3900 for Caterpillar Diesel Engine

Product Details

Product Overview

This premium forged steel crankshaft, identified by part numbers 271-5657 and 222-3900, is a direct replacement component engineered specifically for the Caterpillar C7 diesel engine. As a critical rotating assembly, this crankshaft converts the linear motion of the pistons into rotational torque, making it essential for the engine’s power delivery system. Manufactured to OEM specifications, it ensures a precise fit and reliable performance in demanding applications.

Designed for heavy-duty use, this C7 crankshaft is commonly utilized in a wide range of Caterpillar machinery, including excavators, loaders, bulldozers, trucks, and forklifts. Whether you are performing a complete engine overhaul or a targeted repair, this component provides the durability and strength required to restore your equipment to peak operational condition. Please verify your engine serial number and existing part numbers to confirm compatibility with your specific model.

Key Features & Benefits

• Forged Steel Construction: Provides superior tensile strength and fatigue resistance compared to cast alternatives, ensuring long-term reliability under high-stress diesel engine conditions.
• Precision Machining: Manufactured to OEM size and tolerances, guaranteeing consistent journal diameters and surface finishes for optimal bearing fit and oil clearance.
• Direct Fit Replacement: Designed as a drop-in component for the Caterpillar C7 engine, minimizing installation time and the need for additional modifications.
• Rigorous Quality Control: Each unit undergoes a machinery test report and video outgoing inspection to verify dimensional accuracy and structural integrity before shipment.
• Enhanced Durability: The heat-treated forging process minimizes wear and resists torsional stress, extending the service life of the engine’s rotating assembly.
• Versatile Application: Suitable for on-highway trucks and off-highway heavy equipment, making it a versatile solution for fleet maintenance and repair shops.

Technical Specifications

OEM Cross-Reference

This crankshaft is designed to replace or serve as an aftermarket alternative for the following original equipment manufacturer (OEM) part numbers:

• Caterpillar OEM: 271-5657, 222-3900

Note: These numbers are direct cross-references. Always verify the physical dimensions and bolt pattern of your original part against this unit before purchase.

Compatibility

This crankshaft is engineered for the Caterpillar C7 inline 6-cylinder diesel engine. Based on standard industry applications, it is commonly used for the following types of machinery:

• Excavators
• Loaders
• Bulldozers
• Trucks (medium-duty and heavy-duty)
• Forklifts
• Buses
• Other industrial equipment powered by the C7 engine

Disclaimer: This compatibility list is inferred from the engine model. Actual fitment depends on the specific chassis, engine serial number, and application. We recommend checking with a qualified technician or your equipment’s service manual.

Global Supply & Distribution

We maintain a robust supply chain from our manufacturing base in Guangdong, China, enabling efficient worldwide distribution. Our logistics network supports fast delivery to major industrial hubs and ports across North America, Europe, Asia-Pacific, the Middle East, Africa, and South America.

We have extensive experience in international trade, ensuring that all shipments are properly documented, packaged for heavy goods, and compliant with export regulations. Whether you require air freight for urgent repairs or sea freight for bulk inventory, we can coordinate the most cost-effective and timely shipping solution for your business.

Quality Assurance

Our manufacturing process adheres to strict quality control standards. Every crankshaft is inspected to ensure it meets the required material hardness, dimensional tolerances, and surface finish.

• Testing: A Machinery Test Report is provided with each unit, confirming performance under simulated load conditions.
• Inspection: Video Outgoing Inspection is available upon request, allowing you to visually verify the product before it ships.
• Warranty: This product comes with a 6-month warranty against manufacturing defects. This covers issues arising from material or workmanship under normal use conditions.

FAQ

Q: How can I confirm this crankshaft will fit my specific Caterpillar C7 engine?
A: While this crankshaft is designed for the C7 model, there can be variations in crank nose, flywheel bolt patterns, and counterweight configuration across different C7 serial number ranges. We strongly recommend comparing the overall length, main bearing journal diameter (typically 3.5 inches), and rod journal diameter (typically 3.0 inches) with your existing crankshaft. Cross-referencing your engine’s serial number with the OEM part numbers 271-5657 or 222-3900 is the most reliable method.

Q: What installation precautions should be taken when replacing a crankshaft?
A: Installation should be performed by a qualified diesel mechanic. Ensure the engine block is perfectly clean and that all oil passages are free of debris. Always use new main and rod bearings, and apply the correct assembly lubricant to journals. Torque all main bearing and connecting rod bolts to the manufacturer’s specifications using a calibrated torque wrench. It is also critical to check crankshaft end-play after installation.

Q: Is this a reground or remanufactured crankshaft, or is it new?
A: This is a new forged steel crankshaft, manufactured to OEM standard size. It is not a reground or remanufactured unit. This ensures that the journals are at their original thickness and hardness, providing maximum service life and allowing for future regrinds if necessary in a rebuild cycle.