Product Overview

This high-quality piston ring set is engineered for the 4DW91-56G2 diesel engine model, a workhorse powering critical machinery across multiple industries. As a professional supplier with extensive global export experience, we provide reliable, OEM-specification parts to support maintenance and repair operations worldwide. Our products are trusted by distributors and workshops in North America, Europe, the Middle East, and the Asia-Pacific region.

Key Features & Benefits

• Precision Engineered: Manufactured to exact OEM dimensions and tolerances for a perfect fit and optimal engine performance.
• Enhanced Durability: Made from high-grade materials to withstand the high-pressure and high-temperature environment of diesel engines, ensuring long service life.
• Superior Sealing: Designed to maintain optimal compression, reduce blow-by, and improve fuel efficiency in industrial and marine applications.
• Rigorous Quality Control: Each set undergoes strict inspection, supported by machinery test reports and video outgoing-inspection documentation.
• Global Compliance Ready: Packaged and documented for smooth international shipping and customs clearance.

Technical Specifications

OEM Cross-Reference

This piston ring set is manufactured as a direct replacement for the original part in the 4DW91-56G2 engine. It is designed to meet or exceed the performance of the genuine OEM part. Please verify your engine’s model number and specifications for correct fitment. For specific OEM part number confirmation, please contact our technical support team.

Compatibility

This part is specifically designed for diesel engines bearing the model designation 4DW91-56G2. This engine model is commonly found in a wide range of heavy-duty machinery, including:

• Construction: Excavators, loaders, bulldozers, and compactors.
• Industrial & Genset: Stationary power generators and industrial pumps.
• Marine: Auxiliary engines and propulsion systems for workboats.
• Agriculture & Handling: Tractors, combine harvesters, and forklifts.

Global Supply & Distribution

We specialize in seamless international B2B logistics. Our established supply chain ensures reliable delivery to key industrial hubs and ports worldwide.

• Primary Markets: We actively serve distributors in North America (USA, Canada, Mexico), the European Union, the Middle East (UAE, Saudi Arabia), Southeast Asia, and Australia.
• Efficient Logistics: We offer consolidated sea freight for large orders and expedited air freight options to major airports, ensuring you get the parts you need without costly downtime.
• Export Expertise: All documentation (commercial invoice, packing list, certificate of origin) is prepared to international standards, facilitating smooth customs clearance.

Quality Assurance

Our commitment to quality is integral to our manufacturing process, providing you with parts you can trust for critical engine repairs.

• Manufacturing Standards: Produced in a certified facility in Guangdong, China, utilizing advanced machining and quality control systems.
• Comprehensive Warranty: Backed by a 6-month warranty against manufacturing defects, covering parts replacement.
• Verifiable Testing: Quality is verified through machinery test reports. Furthermore, optional video outgoing-inspection is available to provide visual confirmation of the product and packaging before shipment.

FAQ

Q: How can I be sure this piston ring set will fit my 4DW91-56G2 engine?
A: This set is manufactured to the exact OEM specifications for the 4DW91-56G2 model. We recommend cross-referencing your engine’s serial number and the existing ring dimensions with our technical specifications. Our support team can assist with pre-purchase verification.

Q: What is included in the packaging, and how is it protected for international shipping?
A: Each piston ring set is individually packed in a protective plastic bag, placed in a sturdy box, and then consolidated into secure cartons for palletized shipping. This multi-layer packing prevents corrosion and damage during long-distance transit.

Q: Do you provide any documentation to verify the part’s quality for my end customers?
A> Yes. We provide machinery test reports for quality assurance. Upon request, we can also arrange a video outgoing-inspection, giving you a real-time view of the product’s condition, measurements, and final packaging before it leaves our factory.

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 .