Product Overview

This is a high-quality replacement piston ring set engineered for Kubota Z602 and D902 series diesel engines. Designed to meet or exceed OEM specifications, this part is essential for restoring engine compression, reducing oil consumption, and ensuring optimal performance in industrial and agricultural machinery. We specialize in the global supply of critical engine components, serving major markets across North America, Europe, the Asia-Pacific region, and the Middle East with reliable shipping and export compliance.

Key Features & Benefits

• Precision Engineered: Manufactured to exact OEM dimensions (OEM Size) for a perfect fit and seamless installation, ensuring proper cylinder sealing.
• Enhanced Durability: Made from high-grade materials to withstand the high temperatures and pressures within diesel engines, promoting long service life.
• Optimal Performance: Restores factory-level compression, maximizes engine power output, and minimizes blow-by for efficient fuel combustion.
• Reduces Oil Consumption: Proper sealing prevents excessive oil from entering the combustion chamber, lowering operating costs and emissions.
• Rigorous Quality Control: Each set undergoes machinery testing and video outgoing inspection to guarantee consistency and reliability.

Technical Specifications

OEM Cross-Reference

This piston ring set directly replaces the following OEM part numbers:

• Kubota: 1J091-21050
• Kubota: 1G460-21050

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

Compatibility

Engine Models: This piston ring set is specifically designed for the Kubota Z602 and D902 series diesel engines.

Vehicle & Machinery Application: Commonly found in a range of Kubota-powered equipment, including:

• Kubota Tractors (Various Models)
• Kubota Excavators (Mini-Excavators)
• Kubota Zero-Turn Mowers
• Other industrial and agricultural machinery utilizing the Z602/D902 engine platform.

Global Supply & Distribution

We are a professional exporter of automotive and machinery engine parts with extensive experience in international B2B trade. Our logistics network ensures efficient delivery to key global markets.

• Worldwide Shipping: We ship to all major continents including North America (USA, Canada, Mexico), Europe (UK, Germany, France, Italy), Asia-Pacific (Australia, Japan, Korea), and the Middle East (UAE, Saudi Arabia).
• Fast Port Delivery: Consolidated shipments ensure cost-effective and timely delivery to major seaports and industrial hubs.
• Trade Compliance: All exports are handled with proper documentation, adhering to international trade regulations and standards.

Quality Assurance

Our commitment to quality ensures you receive reliable parts for critical engine repairs.

• Manufacturing Standards: Produced in ISO-certified facilities using precision tooling to ensure dimensional accuracy and material integrity.
• Comprehensive Warranty: Backed by a 6-month warranty against manufacturing defects.
• Testing & Inspection: Every production batch is supported by a machinery test report. Furthermore, our video outgoing-inspection process provides documented proof of quality before shipment.

FAQ

Q1: How do I confirm this piston ring set will fit my specific Kubota engine?
A1: The most accurate method is to cross-reference the OEM part number stamped on your original rings or listed in your engine’s service manual with our listed numbers (1J091-21050, 1G460-21050). Also, verify your engine’s model designation (Z602 or D902) is an exact match.

Q2: What is included in the “video outgoing-inspection”?
A2: This is a quality control procedure where a sample from your order batch is inspected on video. The video typically checks critical dimensions, surface finish, packaging, and markings, providing you with visual assurance that the parts meet specifications before they leave our factory.

Q3: Are there any specific installation precautions for these diesel piston rings?
A3: Yes. Always ensure the cylinder bore is within serviceable limits and properly honed. Install rings with the correct side facing up (markings usually indicate the top) and stagger the ring end gaps according to the engine manufacturer’s specifications (typically 120 degrees apart). Use a proper ring expander tool to avoid scratching or distorting the rings during installation.

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 .