6d140 S6d140 Piston Skylight 6211-31-2111 For Komatsu Excavator Pc650-3 Bulldozer D135a-2 D155ax-3

Product Details

Product Overview

This high-quality piston, identified by the OEM part number 6211-31-2111 and commonly referred to as a “Skylight” piston, is a critical component for the Komatsu S6D140 diesel engine. It is designed to meet rigorous standards for heavy-duty applications, ensuring reliable performance and longevity.

Specifically engineered for use in demanding machinery, this piston is compatible with the Komatsu PC650-3 excavator and D155AX-3 bulldozer, as well as the D135A-2 model. As a direct replacement part, it offers a precise fit and function, helping to restore engine compression and power output in your Komatsu equipment.

Manufactured by, this component is an ideal choice for maintenance and overhaul projects, providing a cost-effective solution without compromising on quality. It is a crucial part for any workshop or fleet manager looking to keep their Komatsu heavy machinery operating at peak efficiency.

Key Features & Benefits

• Precision Engineering: Manufactured to OEM size and specifications (6211-31-2111) for a direct, hassle-free replacement, minimizing downtime during engine rebuilds.
• Enhanced Durability: Built from high-strength materials to withstand the extreme temperatures and pressures of a diesel combustion cycle, ensuring a long service life.
• Restored Engine Performance: Replacing worn pistons with this component helps restore compression, reduce oil consumption, and improve overall engine power and fuel efficiency.
• Verified Quality: Each unit is subject to outgoing inspection and a machinery test report is available, providing confidence in the part’s reliability before installation.
• Broad Compatibility: Designed for the robust S6D140 engine family, making it suitable for various heavy equipment models including excavators and bulldozers.
• Secure Packaging: Packed in plastic bags and sturdy cartons to ensure the piston arrives in perfect condition, free from damage during transit.

Technical Specifications

OEM Cross-Reference

This piston is a direct replacement for the following OEM part numbers. Please verify your engine’s specific requirements before ordering.

• Komatsu OEM: 6211-31-2111

Note: This part is often referred to as a “Skylight” piston in aftermarket catalogs and may be listed under alternative reference numbers for the S6D140 engine.

Compatibility

This piston (6211-31-2111) is commonly used for the following applications. Fitment is inferred based on the common use of the S6D140 engine in these models.

• Engine Models: Komatsu S6D140
• Excavator: Komatsu PC650-3
• Bulldozer: Komatsu D155AX-3, Komatsu D135A-2
• Other Applications: This S6D140 engine is also utilized in various other heavy machinery including loaders, forklifts, trucks, and buses. Always cross-reference your chassis or engine serial number for exact fitment.

Global Supply & Distribution

We offer worldwide shipping and reliable logistics to support B2B buyers in the heavy equipment and construction industries. Our distribution network is designed to deliver to major ports and industrial centers efficiently.

• Major Markets Served: North America (USA, Canada), Europe (UK, Germany, France), Asia-Pacific (Singapore, Australia, Japan), Middle East (UAE, Saudi Arabia), Africa, and South America.
• Shipping Capabilities: We provide fast delivery via sea freight (FOB/CIF) and air express (DHL, FedEx, UPS) for urgent requirements.
• Export Experience: Our team is experienced in international trade, customs documentation, and ensuring parts reach global clients without delay.

Quality Assurance

• Manufacturing Standards: Parts are manufactured in ISO-certified facilities, ensuring consistency and adherence to strict quality control measures.
• Testing: Each batch undergoes rigorous testing, including dimensional checks and material analysis. A machinery test report is available upon request.
• Warranty: We stand behind the quality of our parts with a 6-month warranty against manufacturing defects, providing peace of mind for your investment.

FAQ

1. Is this piston a direct fit for my Komatsu PC650-3 excavator?

This piston is designed for the S6D140 engine, which is the standard powerplant for the PC650-3. However, engine configurations can vary. We strongly recommend verifying your engine serial number and comparing it with the OEM part number 6211-31-2111 before purchase to ensure 100% compatibility with your specific machine.

2. What is the recommended installation procedure for this piston?

Installation should be performed by a qualified diesel mechanic. Key steps include: thoroughly cleaning the cylinder bore, correctly orienting the piston (often marked for front/rear), using a ring compressor to install the piston assembly, and torquing the connecting rod bolts to the manufacturer’s specified settings. A service manual for the S6D140 engine is essential for correct procedures and clearances.

3. What maintenance is required for the piston and ring assembly?

Once installed, the piston itself is a maintenance-free component. However, its longevity depends on overall engine health. Regular maintenance includes: using high-quality engine oil and filters, maintaining proper coolant levels, and avoiding engine overloading. If you experience excessive oil consumption or blow-by, it may indicate piston ring or liner wear, requiring an inspection.