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When selecting crankshaft bearings for the Xiali engine, it's essential to pay attention to several key factors to ensure proper performance and longevity. The selection process should be based on the journal dimensions and the standard repair specifications of the crankshaft. Choosing the right bearing size is crucial, as it must match the required clearance between the bearing and the crankshaft journal.
Before installing a new bearing, it's important to check the roundness and taper error of the bearing housing hole. These measurements should meet the manufacturer’s specifications. If the errors exceed 0.02mm, it could lead to improper fit, increased wear, and potential damage to both the bearing and the crankshaft. Always tighten the bearing cap and seat according to the recommended torque values to maintain structural integrity.
Once the bearing is placed into the housing, the upper and lower halves should protrude slightly above the bearing seat surface by 0.03–0.04mm. This ensures a tight fit, allowing the crankshaft to flex elastically and maintain good contact with the bearing. It also helps in efficient heat dissipation and prevents looseness during operation.
The bearing’s bottom plate should have intact locking teeth. Any damage to these can cause the bearing to shift during operation, leading to oil flow blockage and potential overheating or component failure. Additionally, the back side of the bearing must be smooth and free from any coatings or padding that might interfere with heat transfer.
In some cases, especially when using old bearings or if there is a mismatch in size, a thin layer of copper can be added to the opposite side of the bearing. However, this should be done carefully, ensuring the oil holes remain unobstructed and the surface is properly flattened.
By following these guidelines, you can significantly improve the reliability and performance of the Xiali engine’s crankshaft bearings. Always refer to the manufacturer’s recommendations and use appropriate measuring tools to ensure accuracy throughout the installation process.
For more information on bearings and their applications, visit our website or explore related articles on bearing types, maintenance, and selection. Stay informed and make smart choices to keep your machinery running smoothly.