1. Bearings on the front and rear wheel hubs and rear chain disks

★✪ Because the owner in daily use, wading too deep or often wash the car, let the water into the bearing, the bearing grease gradually fail, the formation of bearing rolling groove and ball wear serious, the clearance increased significantly;

★✪ if the front and rear wheels are too tight or too loose when leaving the factory or selling, the driving will be unstable for a long time, the bearing is stuck or the bearing displacement is loose, the ball cage is damaged or falls off, and the clearance is too large, which makes the brake disc and the wheel hub phase friction and increases the driving resistance;

★✪ The bearing on the rear sprocket disk is easy to enter water or adjust too tight and loose, which will cause damage, so the owner should pay special attention to check and maintain in time when washing the car or going over the deep water pit. If the replacement is damaged, it must be in place and adjusted until the wheel rotates flexibly and there is no obvious clearance.

2, crankshaft connecting rod size roller bearings and ball bearings on both sides

Generally, two-stroke engines are more easily damaged. The main cause of the damage to the roller bearing of the connecting rod size is: the oil quality is too poor or the oil amount is too small.

★✪ The engine working temperature is too high, aggravate the friction heat generating surface softening, premature fatigue spalling of the working face, spalling particles into the cage of the steel column, resulting in operation block; The roller produces abnormal load on the cage, aggravates the wear of the cage, causes the cage to break and break, and the crankshaft connecting rod to lock.

★✪ If the oil replaced by the four-stroke engine is shoddy products or the use period is too long, the lubrication effect is reduced and the wear is aggravated, which is easy to produce impurities and block the oil passage; After the assembly or overhaul of the new car, the hard foreign matter in the instrument belt used in the field is not clean enough or enters the bearing channel during correction, causing the bearing rotation to be blocked; The crankshaft is pressed with different cores or the crankshaft is misaligned during installation, which increases the rotating load of the bearing and causes damage.

3, the bearings on the wheels of the chartered car

Generally, the shock absorption after the car is a single support, the load is large, if the bad road conditions do not slow down, easy to cause wear, affecting the service life, easy water should be paid attention to when washing the car.

4. Upper and lower bearings of the column

Due to the failure of the front shock absorption, insufficient lubrication or the discomfort of the upper and lower fastening force, the ball is broken or the ball working surface is spalling, and the direction steering is astringent or deviated, which affects the safety of the driving.

To sum up: bearing damage is mainly caused by poor lubrication, installation is not in place, improper clearance and poor use environment, etc., if not found or repaired early, it will cause greater losses or affect driving safety. Therefore, please manufacturers, dealers, maintenance industry and owners to pay attention to avoid such accidents.

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