Product Overview

This high-performance piston and pin assembly is engineered as a direct replacement for Doosan D34 and D34F series diesel engines. Designed to meet or exceed OEM specifications, it is a critical component for engine rebuilds and maintenance across construction, industrial, agricultural, and marine applications. We supply this part globally, with established distribution to major markets in North America, Europe, the Middle East, and Asia-Pacific, ensuring reliable support for your fleet and machinery operations.

Key Features & Benefits

• Precision Engineered: Manufactured to exact OEM dimensions and tolerances for a perfect fit and optimal engine performance.
• Enhanced Durability: Constructed from high-grade materials to withstand the high compression and thermal stresses of diesel operation.
• Reliable Performance: Ensures proper compression, reduces oil consumption, and contributes to overall engine efficiency and longevity.
• Complete Assembly: Includes the piston pin, providing a ready-to-install solution that saves time and ensures component compatibility.
• Global Compliance: Packaged and documented for smooth international shipping and customs clearance.

Technical Specifications

OEM Cross-Reference

This piston assembly is a direct replacement for the following OEM part numbers:

• Doosan: 7256840, 7256841

Note: OEM Service is available for custom requirements. Please contact our sales team for inquiries.

Compatibility

This piston is designed for use in Doosan D34 and D34F series diesel engines. These engines are commonly found in a wide range of heavy-duty applications, including:

• Construction Machinery: Excavators, loaders, bulldozers.
• Industrial Power Units: Generators (Gensets), pumps, compressors.
• Agricultural Equipment: Tractors and harvesters.
• Marine Applications: Auxiliary and propulsion engines for vessels.
• Material Handling: Forklifts and port equipment.

Global Supply & Distribution

We are a professional exporter of heavy-duty engine components with extensive experience in international B2B trade. Our logistics network ensures efficient delivery to key industrial regions worldwide.

• Worldwide Shipping: We ship to all major continents via air and sea freight.
• Key Markets Served: North America (USA, Canada, Mexico), Europe (Germany, UK, Poland, Italy), Asia-Pacific (Australia, Japan, Southeast Asia), the Middle East (UAE, Saudi Arabia), and South America.
• Fast Delivery: Consolidated shipments to major ports like Los Angeles, Rotterdam, Singapore, and Jebel Ali for streamlined local distribution.
• Trade Compliance: All documentation (commercial invoice, packing list, CO if required) is provided to ensure smooth customs processing.

Quality Assurance

We are committed to supplying reliable parts that meet the demands of professional engine rebuilders and fleet managers.

• Manufacturing Standards: Produced in ISO-certified facilities using advanced machining and quality control processes.
• Warranty: Backed by a 6-month warranty against manufacturing defects.
• Testing & Inspection: Each batch undergoes rigorous checks. A Machinery Test Report is available, and Video Outgoing-Inspection can be provided upon request to verify quality before shipment.

FAQ

Q: How can I verify this piston will fit my specific Doosan D34 engine?
A: Please confirm your engine’s model designation (D34 or D34F) and compare it with the listed compatible models. The part numbers 7256840 and 7256841 are the primary identifiers. For absolute certainty, cross-reference your old piston’s casting numbers or consult your engine’s official parts manual.

Q: Is the piston pin included, and is it pre-fitted?
A> Yes, this listing is for the complete 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 documentation do you provide for international commercial orders?
A> For B2B orders, we provide full commercial export documentation, including a detailed Proforma Invoice, Commercial Invoice, Packing List, and Bill of Lading/Air Waybill. A Certificate of Origin can be arranged upon request. The Machinery Test Report is included as part of our standard quality assurance package.

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 .