Cummins 6LTAA9.3 Cylinder Liner 5290937 for Excavator & Heavy Duty Engine Parts

Product Details

Product Overview

This cylinder liner, part number 5290937, is a critical component engineered specifically for the Cummins 6LTAA9.3 diesel engine. As the heart of the engine’s combustion chamber, this liner provides the durable, precision-machined surface required for optimal piston ring sealing and heat dissipation in heavy-duty applications.

Commonly utilized in a wide range of off-highway and commercial vehicles — including excavators, loaders, bulldozers, forklifts, trucks, and buses — this liner is manufactured to meet strict OEM dimensional tolerances. This ensures reliable performance and a direct fit for engine rebuilds or overhauls, reducing downtime for your fleet.

Key Features & Benefits

• OEM Specification: Manufactured to the exact OEM size and tolerance standards, ensuring a direct, reliable replacement without modification.
• Enhanced Durability: Constructed from high-grade cast iron to withstand extreme combustion pressures and temperatures, providing a long service life.
• Precision Fitment: The liner’s bore finish and flange height are strictly controlled to ensure proper sealing and compression, maximizing engine efficiency.
• Corrosion Resistance: The material composition offers excellent resistance to corrosion from fuel combustion byproducts and coolant, preventing premature failure.
• Reduced Downtime: Designed as a drop-in replacement, allowing for quicker engine assembly and reduced vehicle downtime during major overhauls.
• Rigorous Testing: Each liner undergoes dimensional and material verification to ensure it meets the high standards required for heavy-duty diesel engines.

Technical Specifications

OEM Cross-Reference

This cylinder liner is the direct replacement for the following OEM part numbers:

• Cummins Part Number: 5290937
• Cross-Reference: 5290937NX, 5290937RX (Common aftermarket cross-references)

Note: Always verify the engine block casting and original part number before ordering to ensure compatibility.

Compatibility

This part is specifically designed for the Cummins 6LTAA9.3 engine platform. It is commonly used in the following equipment applications:

• Construction: Excavators, Loaders, Bulldozers
• Material Handling: Forklifts
• Commercial Vehicles: Heavy-duty Trucks, Buses
• Industrial: Generator sets and other industrial machinery powered by the 6LTAA9.3 engine.

Global Supply & Distribution

We provide reliable worldwide shipping to support international B2B buyers and workshops. Our distribution network ensures fast delivery to major industrial hubs and ports across North America, Europe, Asia-Pacific, the Middle East, Africa, and South America.

With extensive experience in export logistics, we offer various shipping options including express courier (DHL, FedEx, UPS), air freight, and sea freight. We are committed to international trade compliance and efficient customs clearance to get your parts to you as quickly as possible.

Quality Assurance

Our cylinder liners are manufactured in ISO-certified facilities, ensuring consistent quality control throughout the production process. Each unit is inspected for dimensional accuracy, surface finish, and material integrity.

• Manufacturing Standard: ISO 9001
• Testing: Machinery test reports and video outgoing inspection are available upon request.
• Warranty: Backed by a 6-month warranty against manufacturing defects, providing peace of mind for your engine rebuild project.

FAQ

Q: Is this liner a direct fit for my Cummins 6LTAA9.3 engine rebuild?
A: Yes, this liner is manufactured to the OEM standard size and specifications for the Cummins 6LTAA9.3. It is designed as a direct replacement. However, we recommend measuring your engine block bore to confirm it has not been previously over-bored, as this liner is for standard-size applications only.

Q: What is the recommended installation procedure for this cylinder liner?
A: Installation should be performed by a qualified diesel mechanic. The liner block bore must be clean and free of debris. We recommend using a suitable liner installation tool to press the liner into the block evenly. After installation, verify the liner protrusion (height above the block deck) using a dial indicator to ensure it is within the engine manufacturer’s specified tolerance.

Q: How should I store this liner before installation?
A: Store the liner in its original packaging in a clean, dry environment to prevent rust or contamination. Keep it away from moisture and extreme temperature fluctuations. If the liner will be stored for an extended period, apply a light coat of engine oil to the bore surface to protect against corrosion.