Mitsubishi K4N Piston Ring Set 90mm for SK045 Excavator MM57SR MM45 Loader NPR

Product Details

Product Overview

This premium piston ring set is specifically designed for the Mitsubishi K4N diesel engine, a power unit commonly found in a range of heavy construction and agricultural machinery. With a standard bore size of 90mm, this ring set is a direct replacement component for engines used in excavators like the SK045 and wheel loaders such as the MM57SR and MM45.

Manufactured to strict OE specifications, this set ensures your engine maintains optimal compression, reduces oil consumption, and minimizes blow-by. Whether you are rebuilding an engine for a compact excavator or a skid steer loader, this K4N piston ring set provides the reliability and performance required for demanding worksites.

Key Features & Benefits

• Precision Fitment: Engineered to match the exact dimensions of the Mitsubishi K4N engine (90mm bore), ensuring a proper seal and efficient operation.
• Durable Construction: Made from high-quality alloy cast iron, providing excellent wear resistance and longevity in high-temperature, high-pressure diesel environments.
• Optimized Oil Control: Features a specialized oil ring design that effectively scrapes excess oil from the cylinder wall, reducing oil consumption and preventing carbon buildup.
• Reduced Friction: Advanced surface treatment minimizes friction against the cylinder liner, improving fuel efficiency and extending engine life.
• Complete Set: Includes all necessary compression rings and oil rings for a full cylinder rebuild, simplifying your ordering process.
• Cost-Effective Solution: Provides a high-quality alternative to expensive OEM parts without compromising on performance or durability.

Technical Specifications

OEM Cross-Reference

This piston ring set is a direct aftermarket replacement for the following OEM part numbers. Please verify your existing part number for compatibility.

• OEM No: / (OEM number not provided; cross-reference with Mitsubishi K4N service parts)
• Common Reference: Compatible with standard Mitsubishi K4N engine rebuild kits.

Note: If your OEM number is not listed, please contact us with your engine serial number for verification.

Compatibility

This piston ring set is specifically designed for the Mitsubishi K4N diesel engine. It is commonly used for the following machinery applications:

• Excavators: SK045
• Wheel Loaders: MM57SR, MM45
• Other Applications: Commonly used in compact construction equipment, agricultural tractors, and industrial generators powered by the Mitsubishi K4N engine.

Important: Always confirm your engine model and bore size (90mm) before purchasing.

Global Supply & Distribution

We are a professional supplier of diesel engine components, serving a global network of B2B clients. Our logistics network ensures reliable and timely delivery to major markets worldwide.

• Major Markets: We export extensively to North America, Europe, Southeast Asia, the Middle East, Africa, and South America.
• Shipping Capabilities: We offer flexible shipping options including sea freight (FOB/CIF), air freight, and express courier (DHL, FedEx, UPS) to meet urgent requirements.
• Fast Delivery: Orders are processed and dispatched from our warehouse in Shanghai, China, with efficient delivery to major ports and industrial centers.
• Trade Compliance: We adhere to international trade standards and can provide necessary documentation for customs clearance.

Quality Assurance

We are committed to providing high-quality aftermarket parts that meet or exceed OEM standards.

• Manufacturing Standards: Our products are manufactured under strict quality control processes using high-grade materials.
• Inspection: Parts undergo dimensional and visual inspection before packing to ensure they meet specifications.
• Warranty: We provide a standard warranty against manufacturing defects. After-sales support is available online for installation and troubleshooting.

FAQ

Q: How do I confirm this piston ring set fits my engine?
A: The most important factors are the engine model (Mitsubishi K4N) and the cylinder bore diameter (90mm). Please check your engine’s data plate or service manual to confirm these specifications. If your engine is a K4N with a 90mm bore, this set is the correct choice.

Q: What is included in this piston ring set?
A: This set includes a complete set of rings for one cylinder: typically two compression rings and one oil control ring. For a 4-cylinder engine like the K4N, you will need to order four sets to rebuild the entire engine.

Q: Can I install these rings without removing the engine?
A: While possible in some cases, we strongly recommend removing the cylinder head and oil pan to properly clean the cylinder bore and install the rings. Ensure the cylinder walls are not worn beyond service limits. For best results, this should be done during a full engine overhaul by a qualified mechanic.