Product Details

Product Overview

This high-quality Doosan D34 piston with pin (OEM numbers 7256840 and 7256841) is a critical replacement component designed for heavy-duty machinery engines. Manufactured to meet or exceed OEM specifications, this piston assembly is ideal for maintaining the performance and reliability of your Doosan excavators and industrial engines. We specialize in global B2B supply, serving major markets including North America, Europe, Asia-Pacific, the Middle East, and South America, ensuring fast and reliable delivery to your port or industrial hub.

Key Features & Benefits

• Precision Engineering: Manufactured with high-strength aluminum alloy for superior thermal conductivity and reduced weight, enhancing engine efficiency.
• Durability: Features a robust pin design with a hardened steel surface to withstand extreme combustion pressures and reduce wear.
• OEM Specification: Direct replacement for Doosan part numbers 7256840 and 7256841, ensuring perfect fitment and performance.
• Reliability: Undergoes rigorous quality control testing to ensure consistent compression and long service life in demanding excavation and construction environments.
• Cost-Effective: A premium aftermarket solution that offers significant savings compared to genuine OEM parts without compromising on quality.

Technical Specifications

OEM Cross-Reference

This piston assembly is a direct replacement for the following original equipment manufacturer (OEM) part numbers:

• Doosan: 7256840 (Piston)
• Doosan: 7256841 (Piston Pin)

Please verify your engine model and existing part numbers before ordering to ensure compatibility.

Compatibility

This piston assembly is specifically designed for the Doosan D34 diesel engine. It is commonly used in the following machinery and applications:

• Doosan DX Series Excavators (e.g., DX225, DX260, DX300 models equipped with D34 engine)
• Doosan Solar Series Excavators
• Various Doosan industrial and construction equipment utilizing the D34 powerplant

Note: Always confirm your specific engine serial number and year of manufacture for exact fitment.

Global Supply & Distribution

We are a leading supplier of heavy machinery engine parts with a robust global distribution network. Our capabilities include:

• Worldwide Shipping: Reliable logistics partners ensure fast delivery to major ports and industrial centers worldwide.
• Major Markets Served: North America (USA, Canada, Mexico), Europe (Germany, UK, Netherlands, France), Asia-Pacific (Australia, Singapore, UAE), Middle East (Saudi Arabia, Qatar), and South America (Brazil, Chile).
• Inventory & Speed: Large stock volumes allow for quick dispatch, often within 24-48 hours of order confirmation.
• Export Expertise: Experienced in international trade documentation and customs clearance, ensuring hassle-free transactions for B2B clients.

Quality Assurance

• Manufacturing Standards: Produced in ISO 9001:2015 certified facilities, ensuring consistent quality management.
• Testing: Each piston is subjected to dimensional inspection, material hardness testing, and surface finish checks to guarantee performance.
• Warranty: All parts come with a standard 12-month warranty against manufacturing defects, providing peace of mind for your operations.

FAQ

Q: Is this piston assembly a direct fit for my Doosan DX225LC excavator?
A: This assembly is designed for the Doosan D34 engine. The DX225LC often uses this engine, but we strongly recommend checking your machine’s engine serial number and comparing it with the OEM numbers (7256840/7256841) to confirm compatibility before purchase.

Q: What is the recommended installation procedure for this piston?
A: Installation should be performed by a qualified diesel mechanic. Key steps include thoroughly cleaning the cylinder bore, lubricating the piston rings and pin with clean engine oil, using a ring compressor to install the piston into the cylinder, and torquing the connecting rod bolts to the manufacturer’s specifications. Always consult the Doosan service manual for your specific engine model.

Q: How does this aftermarket part compare to the genuine Doosan piston?
A: This aftermarket piston is manufactured to match OEM specifications in terms of dimensions, material grade, and thermal performance. It offers a cost-effective alternative while maintaining high durability and reliability for heavy-duty applications. We recommend regular inspection as part of your maintenance schedule.

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 .