4TNV84 Piston Ring 129904-22500 for Yanmar Engine Parts Excavator Truck Loader

Product Details

Product Overview

This premium Piston Ring set, identified by the OEM part number 129904-22500, is specifically designed for the Yanmar 4TNV84 diesel engine. As a critical internal engine component, this piston ring assembly ensures optimal compression, oil control, and heat transfer within the cylinder, directly impacting engine performance and longevity.

Manufactured to meet OEM specifications, this ring set is a direct replacement for the original Yanmar parts. It is commonly used in a wide range of heavy equipment and industrial machinery, including excavators, forklifts, bulldozers, trucks, buses, and loaders powered by the reliable 4TNV84 engine. Please verify your engine model and existing part number to ensure a perfect fit for your specific application.

Key Features & Benefits

• OEM Specification Fit: Manufactured to the exact dimensions and tolerances of the original Yanmar 129904-22500 part, ensuring a precise fit without modification.
• Superior Material Composition: Constructed from high-grade alloy cast iron and steel, providing exceptional wear resistance and durability under high temperatures and pressures.
• Optimized Ring Profile: Designed with a specialized barrel face and taper face geometry for rapid break-in, excellent oil control, and reduced blow-by, maximizing engine efficiency.
• Enhanced Durability: Features a robust design that withstands the rigors of continuous operation in demanding environments like construction sites and warehouses.
• Cost-Effective Solution: Offers a significant price advantage over dealership parts while maintaining high quality, making it an economical choice for fleet maintenance and rebuilds.
• Rigorous Quality Control: Each set undergoes strict inspection to guarantee dimensional accuracy and performance reliability before shipment.

Technical Specifications

OEM Cross-Reference

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

• Yanmar: 129904-22500

This part is manufactured to the same specifications as the OEM part but is an aftermarket equivalent. Always confirm your engine’s specific requirements.

Compatibility

This part is specifically designed for the Yanmar 4TNV84 diesel engine. It is commonly used for maintenance and repair in the following types of equipment:

• Excavators: Mini and compact excavators utilizing the 4TNV84 engine.
• Forklifts: Industrial and warehouse forklifts powered by this Yanmar model.
• Loaders: Compact wheel loaders and skid steer loaders.
• Agricultural Machinery: Tractors and other farm equipment.
• Construction Equipment: Bulldozers and road construction machinery.
• Commercial Vehicles: Small trucks and buses.

Note: Compatibility is based on the engine model. Please verify your specific engine serial number and current piston ring part number to ensure a correct fit.

Global Supply & Distribution

We maintain a robust global supply chain to ensure fast and reliable delivery to our B2B partners worldwide. Our inventory is strategically managed to support both small-scale repairs and large fleet overhauls.

• Major Markets Served: North America, Europe (EU), Southeast Asia, Middle East, Africa, and Oceania.
• Shipping Capabilities: We partner with major freight forwarders (DHL, FedEx, UPS, TNT) for express shipping and have extensive sea freight options for bulk orders to major ports like Los Angeles, Rotterdam, Shanghai, and Jebel Ali.
• Fast Delivery: Orders are typically processed and dispatched within 24-48 hours. Standard lead times to industrial centers are 5-10 business days for express and 15-30 days for sea freight.
• Trade Compliance: We have extensive experience in international export documentation and customs clearance to ensure a smooth transaction for our clients.

Quality Assurance

We are committed to delivering high-quality engine components that meet the demands of professional mechanics and fleet operators.

• Manufacturing Standards: Our parts are produced in ISO-compliant facilities using advanced machining and casting processes.
• Testing: Each batch undergoes a Machinery Test Report to verify dimensional accuracy, material hardness, and surface finish. Video Outgoing Inspection is provided upon request for large orders.
• Warranty: All products come with a standard 6-month warranty against manufacturing defects in materials and workmanship.
• Support: Our technical team is available to assist with any fitment or application questions.

FAQ

Q: How do I confirm this piston ring set fits my Yanmar 4TNV84 engine?
A: First, visually confirm your engine model is stamped as “4TNV84” on the engine data plate. Second, locate the current piston ring part number on the original packaging or your service manual. This set is a direct replacement for part number 129904-22500. If you have a different number, please contact us with your engine serial number for verification.

Q: What is the recommended installation procedure for these rings?
A: Installation should be performed by a qualified diesel mechanic. Key steps include: 1) Cleaning the ring grooves in the piston thoroughly. 2) Checking the ring end gap in the cylinder bore using a feeler gauge (specs are typically found in the Yanmar service manual). 3) Using a proper piston ring compressor to install the piston into the cylinder. 4) Ensuring the ring gaps are staggered correctly (typically 120 degrees apart) to minimize blow-by. Do not force the rings into the cylinder.

Q: What is the difference between standard size and oversized rings, and which one do I need?
A: This part is for a standard OEM size (0.00 mm oversize). Oversized rings (e.g., 0.25 mm, 0.50 mm) are used when the cylinder bore has been machined (honed) to a larger diameter to remove scoring or wear. You typically only need oversized rings if you are also installing oversized pistons. If your cylinder bore is within factory wear limits, you should use standard size rings. We recommend a cylinder bore inspection before ordering.