Product Overview

This is a premium replacement piston designed for Yanmar mini excavator diesel engines. Engineered for durability and performance, this part is a critical component for engine overhaul and repair. We supply this high-quality piston globally, with extensive experience serving major industrial markets across North America, Europe, Asia-Pacific, and the Middle East, ensuring reliable parts reach your workshop or assembly line.

Key Features & Benefits

• Precision Engineered: Manufactured to exact OEM specifications for a perfect fit and optimal compression.
• Superior Material: Constructed from high-grade aluminum alloy for an excellent balance of strength, heat dissipation, and reduced weight.
• Enhanced Durability: Features advanced skirt coating and ring groove hardening to minimize wear and extend service life under heavy-duty conditions.
• Restores Engine Performance: Direct replacement part designed to restore original engine power, fuel efficiency, and reliability.
• Global Compliance: Produced for the international aftermarket, suitable for use in various regions and climates.

Technical Specifications

OEM Cross-Reference

This piston directly replaces the following OEM part numbers:

• Yanmar: 129004-22080
• Yanmar (Alternate Format): Ym129004-22080

It is a direct aftermarket equivalent, ensuring compatibility without the OEM price premium.

Compatibility

Engine Models: This piston is specifically designed for the Yanmar 3TNV84, 4TNV84, 3D84-5, and 3D84E-5 series diesel engines.

Machine Applications: Primarily used in the following Yanmar compact construction machinery:

• Yanmar PC30-2 Mini Excavator
• Yanmar WA30-5 Wheel Loader

Note: Always verify your engine model number stamped on the engine block before ordering to ensure correct fitment.

Global Supply & Distribution

We are a trusted global supplier of heavy-duty engine components. Our logistics network ensures efficient delivery to key industrial hubs worldwide.

• Worldwide Shipping: We export to all major continents, including North America (USA, Canada, Mexico), Europe (EU, UK), Asia-Pacific (Australia, Japan, Southeast Asia), and the Middle East.
• Fast Port Delivery: Consolidated container shipments to major ports like Los Angeles, Rotterdam, Singapore, and Jebel Ali for cost-effective bulk orders.
• Export Expertise: All documentation (Commercial Invoice, Packing List, Certificate of Origin) is provided for smooth customs clearance in your country.
• B2B Focus: We specialize in supplying wholesalers, distributors, and large repair workshops with reliable inventory.

Quality Assurance

• Manufacturing Standards: Produced in ISO-certified facilities using precision CNC machining and strict quality control protocols.
• Dimensional Accuracy: Each piston undergoes rigorous inspection to verify critical dimensions, including skirt diameter, pin bore size, and ring groove widths.
• Performance Testing: Materials are tested for hardness and tensile strength to meet or exceed original performance benchmarks.
• Warranty: Backed by a standard warranty against manufacturing defects. Contact us for specific warranty terms applicable to your region.

FAQ

Q: Is this piston sold as a single unit or as a set?
A: This listing is for a single piston. For a complete engine overhaul, you will need to purchase one piston per cylinder. We recommend replacing all pistons in an engine simultaneously for balanced performance.

Q: Do I need to purchase piston rings and the wrist pin separately?
A: Yes, this listing is for the piston assembly itself (the piston body). Piston rings and the wrist (gudgeon) pin are typically sold as separate kits. Please ensure you order the corresponding ring set and pin for the Yanmar 3TNV84/4TNV84 engine for a complete rebuild.

Q: What are the signs that my Yanmar excavator engine needs a piston replacement?
A: Common symptoms include excessive blue smoke from the exhaust (oil burning), a significant loss of engine power and compression, increased oil consumption, and in severe cases, audible knocking from the cylinder. A compression test or leak-down test performed by a qualified mechanic can confirm piston or ring wear.

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 .