Product Overview

This is a premium replacement piston assembly designed for Yanmar 3TNA68 diesel engines. Engineered to meet or exceed original specifications, this kit is a critical component for engine rebuilds and overhauls in heavy-duty applications. We supply this part globally to distributors, workshops, and fleet operators in key industrial markets worldwide, ensuring reliable performance and extended engine life.

Key Features & Benefits

• Precision Engineered: Manufactured to exact OEM dimensions and tolerances for a perfect fit and optimal compression.
• Enhanced Durability: Constructed from high-grade materials to withstand the high temperatures and pressures of diesel combustion.
• Complete Assembly: Includes piston, wrist pin, and rings (1.5mm x 1.5mm x 3.5mm) for a comprehensive repair solution.
• Performance Restoration: Helps restore engine power, fuel efficiency, and reduces oil consumption when replacing worn components.
• Cost-Effective Maintenance: Provides a reliable, high-quality alternative to genuine parts, reducing downtime and maintenance costs.

Technical Specifications

OEM Cross-Reference

This piston kit directly replaces the following OEM part number:

• Yanmar: 129901-22091

Note: Always verify part number compatibility with your specific engine serial number before purchase.

Compatibility

This piston is designed for use in Yanmar 3TNA68 diesel engines. These engines are commonly found in a wide range of industrial and commercial machinery, including:

• Excavators
• Forklifts
• Trucks
• Bulldozers
• Loaders
• Buses
• And other heavy equipment

Global Supply & Distribution

We are a leading supplier of heavy-duty engine components with extensive export experience. Our logistics network ensures efficient delivery to major industrial hubs and ports globally.

• Worldwide Shipping: We ship to North America, Europe, Asia-Pacific, the Middle East, Africa, and South America.
• Fast Delivery: Consolidated sea freight and air freight options available to major ports and cities.
• Trade Compliance: All documentation, including commercial invoices, packing lists, and certificates of origin, is provided for smooth customs clearance.
• B2B Focus: We specialize in supplying wholesalers, distributors, and large-scale repair facilities.

Quality Assurance

Our commitment to quality ensures you receive a reliable and durable product.

• Manufacturing Standards: Produced in ISO-certified facilities using advanced machining and quality control processes.
• Rigorous Testing: Each batch undergoes material hardness tests, dimensional checks, and visual inspections. A Machinery Test Report is available upon request.
• Outgoing Inspection: Video outgoing-inspection is provided to verify product quality and packaging before shipment.
• Warranty Backed: Supported by a 6-month warranty against manufacturing defects.

FAQ

Q: How do I confirm this piston will fit my specific Yanmar 3TNA68 engine?
A: While designed for the 3TNA68 model, we strongly recommend cross-referencing the OEM part number 129901-22091 with your engine’s service manual or existing piston. Engine sub-models or production years may have variations. Providing your engine’s serial number is the best way to guarantee fitment.

Q: Are the piston rings included and pre-fitted?
A> Yes, this is a complete kit that includes the piston, wrist pin, and piston rings (dimensions: 1.5mm x 1.5mm x 3.5mm). The rings are packaged separately and are not pre-installed on the piston, allowing the mechanic to properly gap them during engine assembly according to manufacturer specifications.

Q: What is your lead time for shipping to [Europe/North America/etc.]?
A> Lead times vary by destination and shipping method. For standard sea freight to major ports like Rotterdam, Los Angeles, or Singapore, expect approximately 25-35 days. Express air freight options can reduce delivery to 5-10 business days. Contact us with your location for a precise shipping quote and timeline.

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 .