3TNV70 Main Bearing and Connecting Rod Bearing 0.50 for Yanmar Engine Parts Excavator

Product Details

Product Overview

This precision-engineered set includes the main bearing and connecting rod bearing, machined to a 0.50 oversize specification, designed specifically for the Yanmar 3TNV70 diesel engine. As a critical component of the engine’s rotating assembly, these bearings ensure proper crankshaft support and connecting rod alignment, directly impacting engine longevity and performance.

Crafted from a durable tri-metal alloy, this bearing set provides excellent load-bearing capacity and wear resistance, making it suitable for heavy-duty applications commonly found in excavators, forklifts, and other construction machinery. The 0.50 oversize indicates that these bearings are designed for engines where the crankshaft has been reground to a smaller diameter, requiring a thicker bearing shell to restore proper clearances.

Key Features & Benefits

• Precision Fitment: Manufactured to OEM specifications for the Yanmar 3TNV70 engine, ensuring accurate installation and reliable oil clearance.
• 0.50 Oversize Specification: Specifically designed for engines with reground crankshafts, providing the correct crush height and oil clearance for rebuilt assemblies.
• Durable Material Construction: Made from a high-strength steel backing with a lead-copper overlay for superior fatigue resistance and conformability.
• Direct Replacement: Serves as a direct replacement for worn bearings, restoring engine performance and reducing vibration during operation.
• Improved Engine Life: Helps prevent crankshaft scoring and reduces friction, extending the service interval of the diesel engine.
• Cost-Effective Rebuild Solution: Ideal for engine rebuilders and repair shops looking to restore a 3TNV70 engine to like-new condition without replacing the entire crankshaft.

Technical Specifications

OEM Cross-Reference

While this is an aftermarket replacement part, it is designed to meet or exceed the specifications of the original Yanmar components. The following OEM part numbers are cross-referenced for compatibility:

• Yanmar Main Bearing Set (Standard/0.50) for 3TNV70
• Yanmar Connecting Rod Bearing Set (Standard/0.50) for 3TNV70

Note: Always verify the specific OEM part number stamped on your original bearing or consult your engine parts manual to confirm the correct oversize specification.

Compatibility

This bearing set is commonly used for the following engine and equipment applications:

• Engine: Yanmar 3TNV70 (3-cylinder, diesel)
• Equipment: Excavators, Forklifts, Bulldozers, Loaders, Trucks, and Agricultural machinery

Fitment is inferred based on the engine model. Always verify the engine model number and crankshaft condition before ordering.

Global Supply & Distribution

We provide worldwide shipping for this Yanmar engine bearing set, ensuring fast delivery to major industrial hubs. Our export experience covers:

• North America: Fast shipping to Los Angeles, Houston, New York, and Toronto.
• Europe: Efficient logistics to Rotterdam, Hamburg, and Antwerp.
• Asia-Pacific: Direct routes to Singapore, Dubai, and Sydney.
• Middle East & Africa: Reliable service to Jebel Ali, Dammam, and Durban.

We handle international trade compliance and customs documentation to ensure smooth delivery for B2B buyers, whether you are a workshop, distributor, or engine rebuilder.

Quality Assurance

Each bearing set undergoes rigorous inspection to ensure it meets industry standards. Our quality assurance process includes:

• Dimensional Accuracy: All bearings are checked for correct wall thickness, crush height, and free spread.
• Material Testing: Verification of the tri-metal layer composition for hardness and bond strength.
• Outgoing Inspection: Video inspection reports are provided upon request to confirm part quality before shipment.
• Warranty: Backed by a 6-month warranty against manufacturing defects.

FAQ

Q: How do I confirm that the 0.50 oversize bearing is correct for my engine?
A: The 0.50 oversize is required when the crankshaft has been reground (machined down) by 0.50mm. You must measure the journal diameter of your crankshaft with a micrometer. If the journal is 0.50mm smaller than the standard size, this bearing set is the correct choice. Always verify the existing bearing shell markings (e.g., “0.50” stamped on the back) before purchase.

Q: Can I install these bearings without special tools?
A: While basic hand tools are sufficient for removal, proper installation requires a plastigage to check oil clearance. The bearings must be installed dry (no oil on the back shell) and the housing bore must be perfectly clean. Overtightening the main cap bolts can distort the bearing, so a torque wrench set to the Yanmar 3TNV70 specification is essential.

Q: What is the difference between a standard bearing and a 0.50 oversize bearing?
A: A standard bearing is designed for a factory-new crankshaft. A 0.50 oversize bearing has a thicker wall (by 0.50mm on the inside diameter) to compensate for the material removed from the crankshaft during regrinding. Using a standard bearing on a reground shaft will result in excessive oil clearance, leading to low oil pressure and potential engine failure.