1. Check whether the trademarks of this auto parts are complete. The quality of the formal product outer packaging is very good, and the handwriting on the packaging box is very clear, and the overprint color is also very bright. The product name, specification, model, quantity and registered trademark should be on the packaging box and bag, Factory name, address, telephone number, etc. these manufacturers will also take out their own marks on the accessories. Some very important auto accessories, such as generators, distributors, fuel injection pumps, etc., will also be equipped with some operation instructions, certificates and original inspection. In this way, they can guide users on how to use and maintain correctly, so they should look carefully when purchasing, To prevent buying fake and shoddy products.
2. Check whether the size of the nodule is deformed. Some parts are prone to deformation due to improper manufacturing, transportation and storage. Therefore, during inspection, roll the shaft parts along the glass plate to see if there is light leakage at the joint between the parts and the glass plate. In this way, judge whether it is bending. When purchasing the steel plate or friction plate of the clutch driven plate, You can put the steel friction plate in front of your eyes and observe whether there is warpage. When purchasing the oil seal, the end face of the oil seal with framework should be positive, round and can fit with the flat glass surface, without framework, and the outer edge of the oil seal should be correct. Hold it with your hand to deform it, and it can be restored to its original state after you release it.
3. Check whether the end is flat. During the handling and storage of auto parts, due to vibration and bump, burrs, indentation, damage or cracks often occur in the joint part, which will affect the use of parts. Therefore, pay attention to inspection when purchasing.
4. Check whether there are traces of rust on the surface of auto parts. The surface of some qualified spare parts has both some ice degree and incremental finish. Therefore, the more important the spare parts are, the higher the accuracy will be, and the more strict the anti rust and anti-corrosion packaging will be. Therefore, when you choose to buy them, you must pay attention to inspection. If you find that the school uniform spots on the parts have not changed, Spots or loss of elastic shaft diameter and obvious turning tool lines on the surface should be replaced in time.