Product Overview

This is a premium replacement piston assembly for the Doosan D34 diesel engine, manufactured to exact OEM specifications. Designed for durability and performance, this piston with pin is a critical component for engine rebuilds and maintenance. We supply this part globally to major industrial markets, including North America, Europe, the Middle East, and Asia-Pacific, supporting the operations of equipment fleets worldwide.

Key Features & Benefits

• Precision Engineered: Manufactured to strict OEM dimensions and tolerances for a perfect fit and optimal engine performance.
• Enhanced Durability: Constructed from high-grade materials to withstand the high pressures and temperatures of diesel engine operation.
• Complete Assembly: Includes the piston pin, ensuring you have all necessary components for a seamless installation.
• Reliable Performance: Restores engine compression and power, contributing to lower fuel consumption and reduced emissions.
• Cost-Effective Solution: Provides OEM-level quality and reliability at a competitive price, reducing total cost of ownership.

Technical Specifications

OEM Cross-Reference

This piston assembly directly replaces the following OEM part numbers:

• Doosan: 7256840, 7256841

Always verify the specific part number from your original engine or service manual before ordering to ensure compatibility.

Compatibility

This piston is engineered for the Doosan D34 diesel engine. It is commonly used in a wide range of industrial machinery and vehicles, including but not limited to:

• Forklifts
• Excavators
• Trucks
• Loaders
• Bulldozers
• Buses
• Other heavy machinery powered by the D34 engine.

Global Supply & Distribution

We are a trusted global supplier of heavy machinery engine parts. Our logistics network ensures reliable delivery to key industrial regions:

• Worldwide Shipping: We export to all major markets, including North America (USA, Canada, Mexico), Europe (UK, Germany, Netherlands, Poland), the Middle East (UAE, Saudi Arabia), Asia-Pacific (Australia, Singapore, Japan), and South America.
• Efficient Logistics: Fast container and air freight services to major ports and industrial hubs. We handle all export documentation and customs compliance.
• B2B Expertise: Experienced in international trade, offering flexible terms for wholesalers, distributors, and large fleet operators.

Quality Assurance

We stand behind the quality of our components with a comprehensive assurance process:

• OEM Standards: Parts are manufactured using precision tooling to match original design blueprints.
• Rigorous Testing: Each batch undergoes quality checks. A machinery test report is available upon request.
• Video Inspection: Optional video outgoing-inspection provides visual confirmation of product quality before shipment.
• Warranty: Backed by a 6-month warranty from the date of purchase, covering defects in material and workmanship.

FAQ

Q: How do I confirm this piston will fit my specific Doosan D34 engine?
A: The most reliable method is to cross-reference the part number stamped on your original piston or listed in your engine’s service manual with our part numbers (7256840 or 7256841). You can also provide your engine’s serial number for our technical team to verify.

Q: Is the piston pin included, and is it pre-fitted?
A> Yes, this listing is for the piston assembly which includes the piston pin. The pin is supplied separately within the package and is not pre-installed, allowing for proper lubrication and installation according to your engine rebuild procedures.

Q: What should I check during installation to ensure proper performance?
A> Prior to installation, always check the piston-to-cylinder clearance as specified in the engine service manual. Ensure the ring grooves are clean and the rings are correctly gapped. Proper lubrication of the piston pin and connecting rod small end is critical during assembly.

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 .