6D125 Cylinder Liner 6151-37-3040 6151-21-2220 for Komatsu Engine Repair Parts

Product Details

Product Overview

This high-quality cylinder liner, identified by part numbers 6151-37-3040 and 6151-21-2220, is specifically designed for the Komatsu 6D125 diesel engine series. As a critical component within the engine block, this liner provides a durable and precision-machined surface for the piston to travel, ensuring optimal compression and combustion efficiency.

Manufactured to OEM size specifications, this replacement cylinder liner is an ideal choice for rebuilding or repairing Komatsu engines used in heavy machinery, construction equipment, and industrial power units. While fitment is primarily identified for the 6D125 model, we recommend verifying compatibility with your specific engine serial number to ensure a perfect match. This part is commonly utilized in applications where reliable engine performance and longevity are paramount.

Key Features & Benefits

• Precision Engineering: Machined to exact OEM specifications (6151-37-3040 / 6151-21-2220) for a seamless fit within the 6D125 engine block, reducing installation time and ensuring proper piston ring seal.
• Superior Durability: Constructed from high-grade cast iron or steel alloy to withstand extreme combustion pressures and temperatures, providing extended service life compared to standard replacements.
• Enhanced Compression: The precisely honed inner surface ensures optimal piston-to-liner clearance, maximizing compression ratios for improved fuel efficiency and power output.
• Wear Resistance: Features a hardened surface finish that resists scuffing and scoring, even under heavy load conditions common in construction and industrial applications.
• Direct Replacement: Designed as a direct drop-in component, eliminating the need for additional modifications or custom machining during engine overhaul.
• OEM Cross-Reference: Fully interchangeable with genuine Komatsu parts 6151-37-3040 and 6151-21-2220, offering a reliable aftermarket alternative.

Technical Specifications

OEM Cross-Reference

This cylinder liner is designed to match and replace the following original equipment manufacturer (OEM) part numbers:

• Komatsu OEM: 6151-37-3040
• Komatsu OEM: 6151-21-2220

Note: These numbers are direct cross-references. Please verify your engine’s specific serial number for complete compatibility.

Compatibility

This cylinder liner is specifically designed for the Komatsu 6D125 diesel engine series. It is commonly used for servicing the following equipment categories:

• Construction Machinery: Bulldozers, excavators, and loaders powered by the 6D125 engine.
• Industrial Equipment: Compactors, crushers, and generators utilizing this engine platform.
• Agricultural Machinery: Large tractors and harvesters that employ the 6D125 diesel block.
• Marine & Genset Applications: Auxiliary power units and marine propulsion systems.

Fitment is inferred based on the engine model. Always confirm with your engine serial number before purchase.

Global Supply & Distribution

We offer worldwide shipping to support international B2B buyers. Our distribution network ensures timely delivery to major industrial ports and centers across:

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

We have extensive experience in international trade, ensuring compliance with export documentation and customs requirements. Bulk orders can be consolidated for cost-effective sea freight, while smaller quantities are shipped via express air (DHL, FedEx, UPS) for rapid delivery.

Quality Assurance

Every cylinder liner undergoes rigorous quality control to meet industry standards. Our commitment to quality includes:

• Manufacturing Standards: Produced in ISO-certified facilities with strict adherence to OEM tolerances.
• Testing Procedures: Dimensional inspection, hardness testing, and surface finish verification are performed on each batch.
• Warranty: Backed by a 6-month warranty against manufacturing defects.
• After-Sales Support: Online technical support is available after the warranty period to assist with installation or performance issues.
• Inspection Reports: Machinery test reports and video outgoing inspection are provided upon request for quality verification.

FAQ

Q: Will this cylinder liner fit my Komatsu PC200-7 excavator with a 6D125 engine?
A: This liner is specifically designed for the Komatsu 6D125 engine block. While it is a standard replacement for many 6D125 applications, we recommend verifying your engine serial number against the OEM part numbers (6151-37-3040 or 6151-21-2220) to confirm exact compatibility with your PC200-7 model.

Q: What is the recommended installation procedure for this liner?
A: Proper installation is critical for engine performance. The liner should be installed using a suitable press or installation tool to avoid distortion. Ensure the cylinder block bore is clean and free of debris. After installation, check the liner protrusion (height above the block deck) and piston ring end gap to meet the 6D125 service manual specifications. Always use new gaskets and seals during reassembly.

Q: Can I install this liner without removing the engine from the equipment?
A: While possible in some chassis configurations, it is generally recommended to remove the engine for a full overhaul. This allows for proper cleaning of the block, inspection of other components (pistons, rings, bearings), and accurate measurement of liner protrusion. In-frame liner replacement is typically not advised for heavy-duty Komatsu engines due to the precision required.