Description
Technical Overview & Product Details
Crankpin bearings (also known as big-end bearings) are subject to immense loads in marine diesel engines. The 146673-23380 is manufactured to provide a stable, lubricated surface that maintains consistent oil film thickness even under high-load conditions. By reducing friction and heat generation, this assembly significantly enhances the reliability of the engine’s rotating components.
- Compatible Engine Type: Yanmar marine propulsion and auxiliary engine series.
- Part Number / Designation: 146673-23380.
- Component Type: Crankpin Bearing Assembly (Big-End Bearing).
- Material: High-strength alloy construction with an anti-friction overlay for maximum wear resistance and load-bearing capacity.
- Application: Connecting rod big-end and crankshaft journal interface.
Key Features & Performance
- Superior Load Capacity: Engineered to withstand the cyclic forces transmitted through the connecting rod, ensuring a stable bearing surface that prevents housing damage.
- Advanced Wear Resistance: The specialized alloy composition provides exceptional durability against abrasive wear and fatigue, meeting the stringent requirements for long maintenance intervals in maritime operations.
- Precision Tolerance: Machined to exact dimensions to ensure a secure fit within the connecting rod big-end, preventing migration or “spinning” of the bearing shell.
- Optimized Lubrication: The surface geometry is designed to facilitate consistent hydrodynamic oil flow, maintaining a protective film between the crankshaft and the bearing even during high-load conditions.
Why Source from Heybeli Marine?
Worn crankpin bearings can lead to increased engine noise, “knocking,” and eventually total crankshaft failure. Heybeli Marine protects your vessel’s performance with:
- Strict OEM Interchangeability: Our 146673-23380 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 wear parts, ensuring they reach your vessel or shipyard quickly to avoid maintenance delays.
- Quality Assurance: Every batch undergoes rigorous dimensional verification and bond-strength testing to ensure the bearing liner will not delaminate under heavy-duty maritime conditions.
- Complete Overhaul Support: We provide these bearings alongside connecting rod bolts, pistons, and other internal parts to help you conduct a professional, total engine rebuild.
Technical Maintenance Note:
When installing the 146673-23380, it is vital to ensure the connecting rod big-end bore and crankshaft journal are perfectly clean and free of burrs or debris. Always verify the oil clearance using precision measurement tools or Plastigage to confirm it aligns with the specifications provided in the Yanmar service manual. Do not apply excessive force during installation, as this can distort the bearing shell; ensure the bearing is seated correctly in its housing before securing the connecting rod cap. We recommend applying a light coat of clean assembly lubricant to the bearing surface prior to crankshaft installation.