4TNV88 4TNE88 Piston Ring Set YM129001-22500 129005-22950 for Yanmar Engine Repair Parts

Product Details

Product Overview

This high-quality piston ring set is specifically designed for Yanmar 4TNV88 and 4TNE88 diesel engines. The set includes the critical part numbers YM129001-22500 and 129005-22950, which are essential for maintaining proper compression and oil control in these industrial powerplants. As a direct replacement for OEM components, this piston ring set is commonly used in various heavy equipment applications including construction machinery, agricultural tractors, industrial generators, marine propulsion systems, and material handling equipment.

Manufactured to original equipment specifications, these piston rings ensure reliable engine performance and extended service life. The set provides the necessary sealing between the piston and cylinder wall, optimizing combustion efficiency while minimizing oil consumption. Whether you are performing an engine overhaul or replacing worn rings during routine maintenance, this product offers a cost-effective solution without compromising on quality.

Key Features & Benefits

• Precise OEM Fitment: Manufactured to match exact Yanmar specifications for 4TNV88 and 4TNE88 engines, ensuring proper ring gap and tension without modification.
• Durable Construction: Made from high-grade cast iron with advanced wear-resistant coatings to withstand high combustion pressures and temperatures.
• Enhanced Oil Control: Optimized ring profile design reduces oil consumption while maintaining proper cylinder wall lubrication.
• Improved Compression: Precision-ground sealing surfaces help restore engine compression, improving power output and fuel efficiency.
• Complete Set: Includes all necessary compression rings and oil rings required for one cylinder, simplifying the ordering process.
• Rigorous Testing: Each batch undergoes dimensional inspection and material composition analysis to ensure consistent quality.
• Versatile Application: Suitable for Yanmar engines used in construction, agriculture, marine, genset, and industrial equipment.

Technical Specifications

OEM Cross-Reference

This piston ring set replaces the following original Yanmar part numbers:

• YM129001-22500 – Main OEM reference for 4TNV88/4TNE88 piston ring set
• 129005-22950 – Alternative OEM number for the same application

These numbers correspond to the genuine Yanmar piston ring assembly used in factory engine builds and authorized service parts. The replacement is designed to meet or exceed the specifications of the original components.

Compatibility

This piston ring set is commonly used for the following Yanmar diesel engines:

• 4TNV88 – 4-cylinder, 88mm bore, direct injection diesel engine
• 4TNE88 – 4-cylinder, 88mm bore, indirect injection diesel engine

Typical equipment applications include mini excavators, compact loaders, agricultural tractors, forklifts, generator sets, marine auxiliary engines, and industrial pumps. Always verify your engine model and serial number before ordering to ensure correct fitment.

Global Supply & Distribution

We maintain extensive inventory to support worldwide shipping to major industrial markets. Our logistics network enables fast delivery to:

• North America: Los Angeles, Houston, New York, Toronto, Vancouver
• Europe: Rotterdam, Hamburg, Antwerp, Felixstowe, Gdansk
• Asia-Pacific: Singapore, Shanghai, Tokyo, Busan, Sydney
• Middle East & Africa: Dubai, Jebel Ali, Jeddah, Durban
• South America: Santos, Buenos Aires, Valparaiso

We have extensive export experience to over 40 countries and comply with international trade documentation requirements. Bulk orders and drop-shipping arrangements are available for distributors and repair shops.

Quality Assurance

• Manufacturing Standards: Produced under ISO 9001 quality management systems with strict process controls.
• Dimensional Accuracy: Each ring is checked for gap, side clearance, and radial thickness using calibrated instruments.
• Material Certification: Raw materials are tested for chemical composition and mechanical properties.
• Warranty: 6-month warranty against manufacturing defects in materials and workmanship.
• Inspection: Video outgoing inspection and machinery test reports are available upon request.

FAQ

Q1: How do I confirm this piston ring set fits my Yanmar 4TNV88 engine?
A: Verify your engine model number stamped on the engine data plate. The 4TNV88 has an 88mm bore diameter. Cross-reference your existing part number with YM129001-22500 or 129005-22950. If you need oversized rings for rebored cylinders, please contact us as this set is for standard OEM size only.

Q2: Can I install these rings without removing the engine from the equipment?
A: While possible in some cases, we recommend removing the cylinder head and oil pan for proper access. The piston must be removed from the cylinder to install new rings correctly. Always use a piston ring compressor tool and follow the engine service manual for ring gap positioning and break-in procedures.

Q3: What maintenance is recommended after installing new piston rings?
A: After installation, perform a proper break-in period of 1-2 hours at varying loads (avoid sustained idling). Change engine oil and filter after the break-in period to remove any initial wear particles. Check cylinder compression after 50 operating hours to confirm proper ring seating. Use API-specified diesel engine oil with correct viscosity for your operating conditions.