1. Incorrect toe-in position during tire installation will lead to wheel ellipse. It is necessary to check the distance from the assembly line (the third line) to the rim flange.
2. The steering wheel is a nylon tire, and the nylon rope of the carcass is heated and stretched, which cools when stopping, resulting in a flat point on the load surface and a cam jump when rolling. If you keep driving for a while, the jump will disappear. That's the problem.
3. The steel ring is not round, and the steel ring has a service fatigue period due to the material. In the fatigue period, the collision will produce an ellipse of the steel ring, and the locomotive will jump when running.
4. Serious deviation of wheel dynamic balance. If the gravity at any point in the circumferential direction of the wheel is too large, it will bounce under the acceleration, causing jumping up and down. Need to do wheel dynamic balance.
Extended data:
Truck tire maintenance knowledge:
Pay attention to the tire wear marks. One of the tire maintenance projects is tire transposition. If a spare tire is used in an emergency, the owner should replace it with a standard tire as soon as possible. Because of the particularity of spare tire, Buick did not adopt the method of cyclic transposition of spare tire and other tires, but four tires were transposed diagonally.
The purpose is to make the tire wear more evenly and prolong its service life. In addition, the tire maintenance project also includes adjusting the air pressure. For tire pressure, the owner should not be underestimated. If the tire pressure is too high, it is easy to wear the middle of the tread.
It is worth reminding that it is difficult for car owners to measure tire pressure intuitively and accurately without relying on barometer. There are some details about the daily use of tires. If you pay attention to the distance between the tread and the wear marks, generally speaking, the tire should be replaced if the distance is less than 2-3 mm.
Another example is a flat tire. If it is a tire side, the owner must not listen to the advice of the quick repair shop to repair the tire, but should change the tire immediately, otherwise the consequences will be very serious. Because the sidewall is very thin, it will not bear the weight of the car after repair, and it is easy to puncture.
Prevention first, combining prevention with control, and maintenance according to the maintenance manual. So the truck won't have a big problem.
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