Product Overview

This is a premium-quality piston ring set, part number 4089406, engineered for the Cummins QSX15 diesel engine. Manufactured to exact OEM specifications, this critical component ensures optimal compression, oil control, and engine longevity. We specialize in the global supply of heavy-duty engine parts, serving major industrial markets across North America, Europe, the Middle East, and Asia-Pacific with reliable shipping and export compliance.

Key Features & Benefits

• Precision Engineering: Manufactured to exact OEM dimensions and tolerances for a perfect fit and reliable performance.
• Enhanced Durability: Made from high-grade materials to withstand extreme temperatures and pressures within the QSX15 combustion chamber.
• Optimal Sealing & Efficiency: Designed to maintain cylinder compression, reduce blow-by, and control oil consumption for maximum engine power and fuel efficiency.
• Comprehensive Quality Control: Each part undergoes rigorous inspection, supported by machinery test reports and video outgoing-inspection documentation.
• Direct Replacement: A direct-fit solution that eliminates compatibility concerns, ensuring a straightforward installation process.

Technical Specifications

OEM Cross-Reference

This part is a direct replacement for the following OEM number:

• Cummins: 4089406

Please verify your engine’s specific configuration for absolute compatibility.

Compatibility

This piston ring set is designed specifically for the Cummins QSX15 diesel engine platform. This engine is commonly found in a wide range of heavy-duty machinery and vehicles, including:

• Excavators
• Loaders and Bulldozers
• Heavy-Duty Trucks
• Buses
• Forklifts
• Industrial Power Units

Global Supply & Distribution

We are a trusted partner for B2B clients worldwide, offering seamless logistics and export services. Our supply chain is optimized for fast delivery to major industrial hubs and ports in North America (USA, Canada), Europe (Germany, UK, Netherlands), the Middle East (UAE, Saudi Arabia), and Asia-Pacific (Australia, Singapore). With extensive experience in international trade, we ensure all documentation and compliance standards are met for smooth customs clearance.

Quality Assurance

Our commitment to quality is unwavering. This piston ring set is produced under strict manufacturing controls. Every batch is supported by machinery test reports and undergoes video outgoing-inspection to verify dimensions, material integrity, and performance characteristics. We stand behind our products with a 6-month warranty from the date of purchase, covering defects in materials and workmanship.

FAQ

Q: How do I confirm this piston ring set will fit my specific Cummins QSX15 engine?
A: The primary identifier is the part number 4089406. We recommend cross-referencing this number with your engine’s service manual or the original part removed. The QSX15 engine has variations; confirming the exact engine serial number or ESN with your supplier is best practice for critical rebuilds.

Q: What is included in the quality inspection documentation?
A> We provide a machinery test report detailing material specifications and hardness tests. Additionally, a video outgoing-inspection is available upon request, showing the visual and dimensional checks performed on the batch to ensure it meets OEM standards.

Q: What are the recommended installation procedures for these rings?
A> Always follow the official Cummins QSX15 service manual. Key steps include ensuring the cylinder liner is within wear limits, using a proper ring expander tool to avoid twisting or scratching the rings, staggering the ring end gaps as specified, and lubricating with the recommended engine assembly oil. Proper installation is critical for performance and longevity.

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 .