Product Details

Product Overview

HDparts presents a premium quality diesel engine piston assembly, specifically engineered for Yanmar 3TN86 and 4TN86 industrial engine models. This piston is manufactured to OEM size specifications, ensuring a perfect fit and reliable performance for your excavator, generator, or agricultural machinery. As a global supplier, we ship to major markets including North America, Europe, Southeast Asia, and the Middle East, providing a dependable supply chain for B2B clients worldwide.

Key Features & Benefits

• OEM Standard Dimensions: Manufactured to exact OEM size tolerances for seamless installation and optimal compression.
• Durable Construction: High-strength aluminum alloy casting with reinforced crown design to withstand high combustion pressures.
• Precision Pin Fit: Includes a hardened and ground piston pin with a smooth surface finish to minimize friction and wear.
• Extended Service Life: Designed for long-term durability in continuous-duty applications, reducing downtime and maintenance costs.
• 6-Month Warranty: Backed by a comprehensive warranty, offering peace of mind for your fleet or resale operations.

Technical Specifications

OEM Cross-Reference

This HDparts piston assembly is a direct replacement for the following original Yanmar part numbers:

• Yanmar: 119100-22010
• Yanmar: 119100-22020
• Alternative: 119100-22030

Note: Always verify your engine model and existing part number before ordering to ensure compatibility.

Compatibility

• Engine Models: Yanmar 3TN86 (3-cylinder) and 4TN86 (4-cylinder) naturally aspirated diesel engines.
• Common Applications: Excavators (e.g., Yanmar B series), mini loaders, generators, water pumps, and agricultural tractors.
• Year Range: Fits engines manufactured from the 1990s onward, subject to model variant.

Global Supply & Distribution

HDparts is a trusted exporter of heavy-duty engine components. We offer:

• Worldwide Shipping: Reliable logistics via sea (FCL/LCL), air freight, and express couriers to meet your delivery deadlines.
• Major Markets: North America (USA, Canada, Mexico), Europe (Germany, UK, Netherlands), Asia-Pacific (Australia, Japan, South Korea), Middle East (UAE, Saudi Arabia), and Africa.
• Fast Delivery: Efficient processing to major ports such as Los Angeles, Rotterdam, Shanghai, and Dubai.
• Trade Compliance: Experienced in international export documentation, customs clearance, and B2B wholesale transactions.

Quality Assurance

• Manufacturing Standards: Produced in ISO 9001 certified facilities, ensuring consistent quality control.
• Warranty: 6-month warranty against manufacturing defects in materials and workmanship.
• Testing: Each batch undergoes dimensional inspection and hardness testing to meet OEM performance criteria.

FAQ

Q1: Is this piston a direct fit for my Yanmar 4TN86 engine without modifications?

Yes, this piston is manufactured to OEM size specifications and includes the correct pin and circlips. It is a direct replacement for standard 4TN86 engines. We recommend checking your engine serial number against the OEM reference list above.

Q2: What is the recommended installation procedure for this piston?

Ensure the cylinder bore is within wear limits and properly honed. Lubricate the piston rings and pin with clean engine oil during assembly. Use a ring compressor to insert the piston into the cylinder. Torque the connecting rod bolts to the manufacturer’s specifications (typically 35-40 Nm for 3TN86/4TN86).

Q3: How should I store this piston if not used immediately?

Store the piston in a clean, dry environment at room temperature. Keep it in its original packaging to prevent corrosion or damage. Avoid exposure to moisture or direct sunlight. For long-term storage, apply a light coat of rust-preventive oil to the pin and piston skirt.

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 .