Description
Technical Overview & Product Details
Main bearings are the foundation of any diesel engine’s reciprocating assembly. The 146673-02351 is manufactured to manage high-pressure combustion forces while maintaining a precise oil film thickness. This ensures smooth operation and prevents excessive heat build-up or mechanical fatigue in the crankshaft journal, which is essential for the long-term reliability of heavy-duty propulsion and auxiliary engines.
- Compatible Engine Type: Yanmar marine propulsion and auxiliary engine series.
- Part Number / Designation: 146673-02351.
- Component Type: Main Bearing Assembly.
- Material: High-grade bimetallic or trimetallic alloy with an anti-friction overlay for maximum durability and load-bearing capacity.
- Application: Crankshaft support and journal stabilization.
Key Features & Performance
- Optimal Load Distribution: Engineered to withstand the immense cyclic forces transmitted from the pistons to the crankshaft, providing a stable, uniform bearing surface.
- Superior Wear Resistance: The advanced alloy composition offers exceptional resistance to fatigue and scoring, which is vital for the extended maintenance intervals required in marine operations.
- Precision Tolerance: Machined to exact dimensional specifications to ensure a perfect fit within the bearing housing, preventing “knocking” or vibration during engine rotation.
- Advanced Oil Retention: The surface geometry is optimized to maintain a consistent hydrodynamic lubrication film, ensuring smooth movement even under varying load conditions.
Why Source from Heybeli Marine?
A failing main bearing can lead to catastrophic crankshaft damage and severe engine failure. Heybeli Marine protects your vessel’s performance with:
- Strict OEM Interchangeability: Our 146673-02351 bearings are manufactured to meet the exact hardness and dimensional tolerances required for Yanmar engines.
- Global Strategic Logistics: We maintain a ready-to-ship inventory of these critical internal components, ensuring they reach your vessel or shipyard quickly to avoid costly maintenance delays.
- Quality Assurance: Every batch undergoes rigorous dimensional verification and bond-strength testing to ensure the overlay will not delaminate under heavy-duty maritime conditions.
- Complete Overhaul Support: We provide these bearings alongside seals, gaskets, and other internal parts to help you conduct a professional, total engine rebuild.
Technical Maintenance Note:
When installing the 146673-02351, it is vital to ensure the bearing housing and crankshaft journal are surgically clean and free of debris. Always verify the bearing clearance using Plastigage or precision measurement tools to confirm it aligns with the manufacturer’s specifications. During installation, ensure the bearing shells are seated properly without the use of excessive force that could damage the delicate anti-friction surface. We recommend applying a light coat of clean engine oil or assembly lubricant to the bearing surface before crankshaft installation.