119517-22090 Piston Ring for Yanmar 3T72 3TN72 Engine Excavator & Tractor Parts

Product Details

Product Overview

This premium piston ring set, identified by part number 119517-22090, is specifically designed for Yanmar industrial diesel engines, including the widely used 3T72 and 3TN72 models. Manufactured by, these rings are engineered to restore compression, reduce oil consumption, and optimize combustion efficiency in heavy-duty machinery.

Commonly used in Yanmar-powered excavators, forklifts, bulldozers, loaders, and trucks, this piston ring set is a direct replacement for OEM specifications. Each ring is constructed to OEM size standards, ensuring a precise fit within the cylinder bore without the need for additional modifications. Please verify your engine model and existing part number to confirm compatibility before installation.

Key Features & Benefits

• OEM Equivalent Fitment: Manufactured to match original Yanmar specifications for the 3T72 and 3TN72 engines, ensuring reliable sealing and performance.
• Durable Construction: Built from high-strength alloy materials to withstand the extreme heat and pressure of diesel combustion cycles.
• Reduced Oil Consumption: Precision-machined ring profiles effectively scrape excess oil from cylinder walls, minimizing burn-off and maintaining lubrication integrity.
• Improved Compression: Restores cylinder pressure for better engine starting, increased power output, and enhanced fuel efficiency.
• Cost-Effective Overhaul: A critical component for engine rebuilds, offering a fraction of the cost of a full engine replacement while extending service life.
• Rigorous Quality Control: Each set undergoes outgoing inspection and machinery testing to verify dimensional accuracy and material integrity.

Technical Specifications

OEM Cross-Reference

This piston ring set is a direct replacement for the following original Yanmar part numbers:

• 119517-22090 (Primary OEM Number)

Compatible with Yanmar engine service kits and overhaul gasket sets designed for the 3T72 and 3TN72 series. Always cross-reference your old ring set or engine serial number to ensure correct selection.

Compatibility

This piston ring set is designed for use in Yanmar 3T72 and 3TN72 diesel engines. It is commonly used for the following machinery applications:

• Excavators (mini and mid-size)
• Forklifts
• Bulldozers
• Loaders (wheel and track)
• Trucks and agricultural tractors
• Industrial generators and pumps

Note: Fitment is based on the engine model, not the vehicle chassis. Please verify engine identification tag before purchase.

Global Supply & Distribution

We maintain a robust global supply chain to serve B2B buyers across all major industrial markets. Our stock is strategically located to ensure rapid fulfillment to:

• North America: West Coast (Los Angeles, Seattle) and East Coast (Newark, Savannah) ports.
• Europe: Rotterdam, Hamburg, and Felixstowe hubs.
• Asia-Pacific: Singapore, Shanghai, and Tokyo distribution centers.
• Middle East & Africa: Dubai and Johannesburg gateway ports.

We offer flexible shipping options including sea freight (FCL/LCL), air express (DHL, FedEx, UPS), and rail freight for landlocked regions. All export documentation, including commercial invoices, packing lists, and certificates of origin, is provided to ensure smooth customs clearance.

Quality Assurance

Every piston ring set is manufactured under strict ISO-compliant processes in our Chinese facilities. Key quality measures include:

• Material Certification: Raw materials are sourced from certified steel suppliers with traceable mill test reports.
• Dimensional Inspection: Each ring is checked for end gap, side clearance, and radial wall thickness using digital micrometers and optical comparators.
• Outgoing Video Inspection: We provide video documentation of final inspection upon request for bulk orders.
• Warranty: All products are backed by a 6-month warranty against manufacturing defects in materials and workmanship.

FAQ

Q1: How do I confirm these rings fit my Yanmar 3TN72 engine?
A: Check the engine data plate located on the valve cover or side of the block. Verify the model is listed as “3TN72” or “3T72.” Also, measure the cylinder bore diameter; the OEM standard bore is typically 72mm. If your engine has been previously rebored, you may require oversized rings (0.25mm, 0.50mm, etc.), which are not included in this set.

Q2: Do I need to replace the piston rings in a set, or can I install individual rings?
A: We strongly recommend replacing all rings (compression rings and oil control ring) simultaneously as a complete set. Mixing old and new rings can lead to uneven wear, poor sealing, and premature failure. Always install new rings with a fresh cylinder liner or after a proper deglazing procedure on the existing bore.

Q3: What is the recommended break-in procedure after installing new piston rings?
A: After installation, run the engine at a moderate RPM (around 1200-1500 RPM) with no load for 15-20 minutes to allow the rings to seat against the cylinder walls. Avoid prolonged idling or full-throttle operation during the first hour. Use a high-quality diesel engine oil with the correct viscosity (typically SAE 15W-40 for Yanmar engines) and change the oil after the initial 50 hours of operation to remove any break-in debris.