4TNE92 Piston Ring 129904-22050 Ym129904-22050 for Yanmar Engine Parts

Product Details

Product Overview

This high-quality piston ring set, identified by OEM part numbers 129904-22050 and Ym129904-22050, is specifically designed for the Yanmar 4TNE92 diesel engine. As a critical component for maintaining engine compression and oil control, this piston ring ensures optimal performance and longevity in demanding applications.

Manufactured to OEM specifications, this piston ring set is commonly used in a wide range of construction, industrial, agricultural, generator set, marine, and material handling equipment powered by the Yanmar 4TNE92 engine. Each ring is precision-engineered to provide a reliable seal between the piston and cylinder wall, reducing blow-by and minimizing oil consumption.

Whether you are servicing a compact excavator, a generator, or an agricultural tractor, this piston ring set offers a direct replacement solution backed by rigorous quality control. Always verify your engine model and existing part numbers to ensure correct fitment before installation.

Key Features & Benefits

• OEM Equivalent Fitment: Directly replaces Yanmar part numbers 129904-22050 and Ym129904-22050, ensuring a seamless fit for the 4TNE92 engine block.
• Precision Engineering: Manufactured to OEM size standards, providing the exact groove dimensions and radial wall thickness required for proper ring dynamics.
• Durable Material Composition: Constructed from high-grade alloy iron, offering excellent wear resistance and thermal stability under high-compression diesel operation.
• Enhanced Oil Control: The ring pack is designed to optimize oil scraping and distribution, reducing overall oil consumption and carbon buildup.
• Compression Retention: Maintains peak cylinder pressure for improved fuel efficiency, power output, and reduced exhaust emissions.
• Rigorous Testing: Each batch undergoes video outgoing inspection and machinery test reporting 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:

• 129904-22050 (Yanmar OEM)
• Ym129904-22050 (Yanmar OEM Alternative)

Note: Always verify your engine’s serial number and existing part markings to confirm compatibility. This list is based on published OEM data for the 4TNE92 engine series.

Compatibility

This piston ring set is specifically designed for use in the Yanmar 4TNE92 diesel engine. It is commonly used in the following equipment categories:

• Construction Machinery: Mini excavators, compact track loaders, and skid steer loaders.
• Industrial Equipment: Forklifts, aerial work platforms, and compressors.
• Agricultural Machinery: Tractors, tillers, and harvesters.
• Power Generation: Diesel generator sets.
• Marine Applications: Small workboats and auxiliary engines.
• Material Handling: Boom lifts and telehandlers.

Fitment is inferred based on engine model. Please confirm your specific engine code (e.g., 4TNE92-XXXX) before purchasing.

Global Supply & Distribution

We maintain a robust global supply chain to serve B2B customers across all major industrial markets. Our export capabilities include:

• North America: Fast shipping to major ports (Los Angeles, Houston, New York, Vancouver) and inland industrial hubs.
• Europe: Regular shipments to Rotterdam, Hamburg, Antwerp, and Mediterranean ports for quick distribution.
• Asia-Pacific: Direct service to Singapore, Tokyo, Shanghai, Sydney, and major ASEAN industrial zones.
• Middle East & Africa: Reliable delivery to Dubai, Jeddah, Durban, and Lagos for construction and mining sectors.
• South America: Coverage for Santos, Buenos Aires, and Valparaíso.

With a strong export history from Guangdong, China, we ensure proper documentation, customs clearance support, and competitive freight rates for both air and sea shipments.

Quality Assurance

Every piston ring set is manufactured under strict quality control protocols to meet international standards. Our quality process includes:

• Material Certification: All raw materials are sourced from verified foundries with traceable chemical composition reports.
• Dimensional Inspection: Each ring is checked for groove height, radial thickness, and end gap clearance using precision gauges.
• Video Outgoing Inspection: We provide video evidence of the final inspection process upon request for bulk orders.
• Machinery Test Report: A comprehensive test report is available to verify operational parameters.
• Warranty: Each product carries a 6-month warranty against manufacturing defects, with online after-warranty support available.

FAQ

Q1: How do I confirm this piston ring fits my Yanmar 4TNE92 engine?
A: First, locate the engine model plate on your engine block. Verify it reads “4TNE92” or “4TNE92-XXXX”. Then, check your existing piston ring for the stamped part number. If it matches 129904-22050 or Ym129904-22050, this set is a direct fit. If in doubt, measure the cylinder bore diameter and piston ring groove width against OEM specifications.

Q2: What is the installation procedure for these piston rings?
A: Installation requires standard engine overhaul tools. Ensure the cylinder bore is clean, deglazed, and within service limits. Install rings starting from the bottom (oil ring) upward. Use a ring expander to avoid twisting or breaking the rings. Stagger the ring end gaps at 120-degree intervals away from the piston pin. Always follow the Yanmar service manual for torque specifications and break-in procedures.

Q3: Can I use these rings in an engine that has been bored oversize?
A: No. This part number (129904-22050) is specifically manufactured for OEM standard size cylinders. If your engine block has been bored oversize (e.g., 0.25mm, 0.50mm), you must purchase the corresponding oversized piston ring set. Using standard rings in a bored cylinder will result in excessive end gap and poor compression sealing.