Product Overview

This is a high-quality OEM replacement piston designed for Komatsu S6D140 diesel engines. Engineered for durability and precise fitment, it is an essential component for maintaining the performance and longevity of heavy machinery. We supply this part globally, with extensive experience serving major industrial markets in North America, Europe, the Middle East, and Asia-Pacific.

Key Features & Benefits

• Precision Engineering: Manufactured to exact OEM specifications (OEM Size) to ensure perfect fit and optimal engine compression.
• Enhanced Durability: Constructed from high-grade materials to withstand the extreme pressures and temperatures within a diesel engine cylinder.
• Optimal Performance: Designed to restore engine power, fuel efficiency, and smooth operation in demanding applications.
• Rigorous Quality Control: Each piston undergoes thorough inspection, supported by machinery test reports and video outgoing-inspection for guaranteed quality.
• Global Logistics Ready: Professionally packed for secure international shipping, ensuring parts arrive in perfect condition.

Technical Specifications

OEM Cross-Reference

This piston directly replaces the following OEM part numbers:

• Komatsu: 6211-31-2111

Note: Always verify part numbers against your engine’s service manual or existing component for final confirmation.

Compatibility

This piston is compatible with machinery equipped with the Komatsu S6D140 diesel engine. Primary applications include, but are not limited to:

• Excavators: Komatsu PC650-3
• Bulldozers: Komatsu D135A-2, D155AX-3
• Other Applications: Suitable for Loaders, Trucks, Buses, and Forklifts using the S6D140 power unit.

Global Supply & Distribution

We are a trusted supplier for B2B clients worldwide. Our streamlined export process ensures reliable and timely delivery to major industrial hubs and ports across North America (USA, Canada), Europe (Germany, UK, Netherlands), the Middle East (UAE, Saudi Arabia), and Asia-Pacific (Australia, Singapore). We handle all aspects of international trade compliance, documentation, and logistics to facilitate smooth transactions for our global partners.

Quality Assurance

Our commitment to quality is unwavering. This piston is manufactured in ISO-certified facilities using precision tooling and high-grade alloys. Every batch is subject to stringent testing, including dimensional checks and material analysis. We stand behind our products with a solid 6-month warranty and provide full inspection reports (machinery test report and video outgoing-inspection) upon request, giving you complete confidence in your purchase.

FAQ

Q1: How do I confirm this piston will fit my specific Komatsu engine?
A1: The primary fitment is confirmed by the engine model (S6D140/6D140) and the OEM part number (6211-31-2111). Please cross-reference this number with your engine’s service parts catalog or the number stamped on your original piston. Providing your machine’s model (e.g., PC650-3) and serial number can also help us verify compatibility.

Q2: Is this piston sold as a single unit or as part of a set?
A2> This piston is sold as a single item. For a complete engine overhaul, you will typically require a set matching the number of cylinders in your S6D140 engine. We can supply the required quantity and recommend purchasing matching piston rings for optimal results.

Q3: What are the recommended installation procedures?
A3> Professional installation is highly recommended. Always ensure the cylinder liner is within specification and properly honed. The piston and rings must be installed with the correct orientation as per the service manual, using adequate lubrication. We recommend replacing piston pins, circlips, and connecting rod bearings during reassembly for a complete and reliable repair.

Our advantages

1.An authorized wholesaler of Isuzu genuine parts, Hino genuine parts, Mitsubishi genuine parts and Mahle parts.

2. We are not only supply genuine parts, but also high quality OEM parts, which are made in China or made in Japan.

3. More than 10 years of experience in machinery parts, professional supply of diesel engine parts.

4. Fast delivery, the fastest can be shipped in one day ,more than 500,000 of different types parts in stock.

5. Scientific ERP system, easy and fast to locate the parts that customer needs.

6. Professional technician checks the parts before delivery, to make sure the parts are correct, usable and defect-free.

Exhibition

Packing&Shipping

1.  Our shipment is by air/sea/express (DHL/FEDEX/TNT/UPS/EMS).

2.  Once we get confirmation of payment, we will ship products in 2 days.

3.  Our packaging is standard export wooden box or others as your requirement.

4. We’ll check and test the products before shipping , and givethe pictures to our customers to confirm.

FAQ

Q1. What is your company major products?

A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.

Q2.What is the MOQ?

A: Normally we can supply any quantity if we have in stock.

Q3. What is your payment term ?

A: We accept Western Union, T/T, Paypal.

Q4. What is the packing ?

A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.

Q5. When can you deliver products after payment ?

A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .

Q6. What can you do to complete order perfectly ?

A: In the beginning , We will communicate with clients in details to understand what they need .

Before packing , We will check the products and send photos to clients .After confirmation ,

We will packing products well to avoid damage . Once we get tracking number ,

We will send it to customer and keep contact in with clients .