Connecting Rod 719620-23100 for Yanmar 3D66 3TNA72 3TNE72 3TNE74 Engines

Product Details

Product Overview

This heavy-duty connecting rod, identified by OEM part number 719620-23100 (also known as 3D66, 3TNA72, 3TNE72, 3TNE74), is a precision-engineered component specifically designed for Yanmar industrial diesel engines. This staggered flat connecting rod is a critical internal engine part that connects the piston to the crankshaft, converting linear motion into rotational force.

Manufactured to OEM specifications, this connecting rod is commonly used in a variety of Yanmar equipment models powering construction machinery, agricultural tractors, generator sets, marine vessels, and material handling equipment. Its robust construction ensures reliable performance under demanding working conditions, making it an ideal replacement part for engine overhauls and repairs.

Key Features & Benefits

• OEM Standard Dimensions: Manufactured to match original Yanmar specifications (719620-23100), ensuring a perfect fit and reliable performance without modification.
• Staggered Flat Design: Specifically engineered for the 3D66, 3TNA72, 3TNE72, and 3TNE74 engine series, this unique geometry optimizes clearance and reduces stress concentrations.
• Durable Construction: Made from high-strength alloy steel, heat-treated for maximum fatigue resistance and longevity in high-compression diesel environments.
• Precision Machining: Each connecting rod undergoes strict quality control with accurate big-end and small-end bore diameters for proper bearing fitment.
• Direct Replacement: A drop-in replacement part that requires no additional machining or modification, reducing downtime during engine repairs.
• Versatile Application: Suitable for multiple Yanmar engine models, simplifying inventory management for workshops and parts distributors.

Technical Specifications

OEM Cross-Reference

This connecting rod is a direct replacement for the following Yanmar OEM part numbers:

• 719620-23100 (Primary OEM Number)
• 3D66 (Engine Series Number)
• 3TNA72 (Engine Series Number)
• 3TNE72 (Engine Series Number)
• 3TNE74 (Engine Series Number)

Note: Always verify your engine’s serial number and existing connecting rod markings to confirm compatibility before ordering.

Compatibility

This connecting rod is specifically designed for use in the following Yanmar industrial diesel engines:

• Yanmar 3D66 – Commonly used in mini excavators, generators, and pumps
• Yanmar 3TNA72 – Found in agricultural tractors and compact construction equipment
• Yanmar 3TNE72 – Powering forklifts, gensets, and marine auxiliary engines
• Yanmar 3TNE74 – Used in industrial machinery and material handling equipment

Typical applications include: construction equipment, agricultural machinery, industrial generators, marine propulsion, and material handling vehicles. Fitment is inferred based on OEM specifications; please cross-reference with your original part.

Global Supply & Distribution

We maintain a robust global supply chain capable of shipping this Yanmar connecting rod to customers worldwide. Our distribution network covers:

• North America: Regular shipments to major ports including Los Angeles, Houston, New York, and Vancouver
• Europe: Fast delivery to Rotterdam, Hamburg, Antwerp, and other key industrial hubs
• Asia-Pacific: Express shipping to Singapore, Tokyo, Shanghai, and Sydney
• Middle East & Africa: Reliable service to Dubai, Jeddah, and Lagos
• South America: Direct routes to Santos, Buenos Aires, and Valparaiso

With export experience to over 30 countries, we ensure proper documentation, customs clearance support, and competitive freight rates for both air and sea shipments.

Quality Assurance

Each connecting rod is manufactured under strict quality control standards in ISO-certified facilities. Our quality assurance process includes:

• Dimensional Inspection: All critical dimensions (bore diameters, center-to-center length, and twist) are verified using calibrated instruments
• Material Testing: Chemical composition and mechanical properties are confirmed through spectrometric analysis
• Visual Inspection: Every rod is checked for surface defects, cracks, or improper heat treatment
• Machinery Test Report: Provided with each order to confirm compliance with OEM specifications
• Video Outgoing Inspection: Available upon request for visual verification before shipment

We back this product with a 6-month warranty against manufacturing defects, with online technical support available after the warranty period.

FAQ

Q: How can I verify that this connecting rod fits my Yanmar engine?
A: Check the engine model tag on your equipment (usually located on the valve cover or engine block). Confirm it matches one of the listed models: 3D66, 3TNA72, 3TNE72, or 3TNE74. Also, measure the existing connecting rod’s big-end diameter (typically 40-45mm for these models) and small-end bushing diameter. If in doubt, contact us with your engine serial number for verification.

Q: What installation precautions should I take?
A: Always replace connecting rods in sets for balanced engine operation. Use new connecting rod bolts and nuts (not included) torqued to Yanmar specifications. Check that the big-end bearing shells are correctly seated and lubricate all bearing surfaces with clean engine oil during assembly. Verify piston pin clearance in the small-end bushing before final assembly.

Q: How can I maintain this connecting rod for long service life?
A: Follow Yanmar’s recommended oil change intervals (typically every 250-500 hours) using the correct viscosity grade (usually SAE 15W-40 for diesel engines). Avoid engine over-revving and prolonged operation at maximum load. During routine maintenance, listen for abnormal knocking sounds which may indicate bearing wear. Always inspect connecting rods during major engine overhauls and replace if any signs of fatigue, bending, or stress cracking are detected.