Yanmar 3D84-1 Diesel Engine Crankshaft YM729350-21700 729350-21700

Product Details

Product Overview

This is a high-precision, brand new replacement crankshaft specifically designed for the Yanmar 3D84-1 diesel engine. Manufactured to meet or exceed OEM specifications, this component ensures the reliable conversion of linear piston motion into rotational power. We offer global shipping to major industrial markets worldwide, including North America, Europe, Southeast Asia, and the Middle East, ensuring fast and reliable delivery for your heavy equipment repair needs.

Key Features & Benefits

• Premium Material: Forged from high-strength alloy steel for superior durability and resistance to torsional stress.
• Precision Engineering: Machined to tight tolerances for optimal bearing fit and smooth engine operation, reducing vibration and wear.
• Direct Replacement: Designed as a perfect drop-in replacement for the original Yanmar part, minimizing downtime during installation.
• Enhanced Performance: Ensures consistent power output and long service life, critical for demanding excavator and industrial applications.
• Rigorous Quality Control: Undergoes strict testing for hardness, balance, and dimensional accuracy before shipment.

Technical Specifications

OEM Cross-Reference

This crankshaft directly replaces the following original Yanmar part numbers:

• YM729350-21700
• 729350-21700

Please verify your original part number before ordering to ensure correct fitment.

Compatibility

This crankshaft is specifically designed for the Yanmar 3D84-1 diesel engine. This engine is commonly found in:

• Yanmar Mini Excavators (e.g., VIO series, B series)
• Yanmar Compact Track Loaders
• Yanmar Agricultural Tractors
• Industrial and Marine applications using the 3D84-1 power unit

Global Supply & Distribution

We are a dedicated supplier to the global heavy equipment aftermarket. Our logistics network ensures efficient and cost-effective shipping to:

• North America: Fast delivery to major ports and inland distribution centers.
• Europe: Serving key industrial hubs with express shipping options.
• Asia-Pacific: Direct shipping to Japan, Korea, China, Australia, and Southeast Asian markets.
• Middle East & Africa: Reliable supply to construction and mining operations.
• South America: Service to major industrial ports.

We have extensive experience in international trade documentation and compliance, ensuring a smooth customs clearance process for our clients.

Quality Assurance

• Manufacturing Standards: Manufactured in ISO 9001 certified facilities, ensuring consistent quality control.
• Warranty: All parts come with a standard 12-month warranty against manufacturing defects.
• Testing: Each crankshaft undergoes 100% inspection for dimensional accuracy, material hardness, and surface finish before packaging.

FAQ

Q: Is this crankshaft a direct replacement for the original Yanmar part?
A: Yes, this crankshaft (YM729350-21700 / 729350-21700) is manufactured as a direct replacement for the original Yanmar 3D84-1 engine part. It is designed to be a “drop-in” fit, requiring no modifications for installation.

Q: What is the recommended installation procedure?
A: Professional installation by a qualified diesel mechanic is highly recommended. The crankshaft must be installed with new main bearings and thrust washers. Ensure all bearing surfaces are lubricated with clean engine oil during assembly. Follow the Yanmar service manual for the correct torque specifications and tightening sequence for the main bearing caps.

Q: What maintenance should be performed after installing a new crankshaft?
A: After installation, perform an initial engine start-up and check for proper oil pressure. It is critical to break in the engine according to manufacturer guidelines, typically avoiding heavy loads for the first 50 hours. After the break-in period, change the engine oil and oil filter to remove any initial wear particles. Regularly scheduled oil changes are vital for extending the life of the new crankshaft.