What is the replacement standard for pulley wear?
2 Answers
Replacement standard for pulley wear: Pinch the middle upper and lower ends of the belt with one hand to check the belt play. If the belt play is significant, or if you start the engine and observe severe vertical bouncing of the belt when accelerating, it indicates a faulty pulley. Also, inspect the belt for any signs of being "bitten" (fine cracks between the teeth do not count). If there are none, the belt is still in good condition. Below is a related introduction to pulleys: 1. Definition: A pulley is a type of disc-hub component, generally relatively large in size. The manufacturing process typically involves casting or forging (larger designs usually use casting, with materials mostly being cast iron due to its good casting properties, while cast steel is rarely used due to its poor casting properties). Smaller sizes can be designed for forging, using steel as the material. 2. Application: Pulleys are mainly used for long-distance power transmission, such as in small diesel engine power output, agricultural vehicles, tractors, automobiles, mining machinery, machining equipment, textile machinery, packaging machinery, lathes, forging machines, power transmission for small-horsepower motorcycles, power transmission for agricultural machinery, air compressors, reducers, gearboxes, generators, cotton gins, etc. Before assembling the pulley, the final cleaning must be done with gasoline to ensure all parts are clean and dry, guaranteeing tight fitting surfaces free of oil stains and sufficient friction.
I remember a while ago my car's belt suddenly snapped, which really screwed me over. That time it was because I didn't check the wear standards in time. The repair shop said the surface of my belt pulley was covered in cracks like a spider web, and normally the belt should be tight when pulled by hand, but mine was loose and sagging, slipping and making squeaking noises. Later, the mechanic told me that generally, it should be replaced every 60,000 to 80,000 kilometers or every five years, depending on the vehicle's manual. If the belt has deep cracks or is worn too thin, and it looks rough to the naked eye, replace it immediately to avoid bigger problems. Now I check it regularly—safety comes first, and don't try to save on such small expenses.
