How to maintain and check axle head hub bearings

Hub bearing is used in the automobile axle to bear and guide the rotation of the hub of the parts, both bearing axial load and radial load, is an important part of the vehicle load and rotation.

Hub bearing is an important part of automobile. Hub bearing is responsible for reducing the friction resistance of the chassis and maintaining the normal running of the car. If the hub bearing fails, it may cause noise, bearing heating and other phenomena, especially the front wheel is more obvious, which is easy to lead to dangerous phenomena such as direction control. Therefore, hub bearings should be maintained on schedule.

1. Check hub bearing

(1) check the tightness of the hub bearing, first of all, the axle of the wheel at one end of the wheel hub of the car under inspection is set up, and the car is safely set up with a stool, masking wood and other tools.

(2) rotate the inspected wheel several times by hand to see whether the rotation is smooth and whether there is abnormal noise. If the rotation is not smooth and there is friction sound, the braking part is not normal; If there is no noise, rotation is not smooth and tight, indicating that the bearing part is not normal. The wheel hub should be removed when the above abnormal phenomenon occurs. For small cars, check the hub bearing, hold the upper and lower sides of the tire with both hands, pull the tire back and forth with both hands, repeat many times. If normal, there should be no loose and blocked feeling; If the swing is obviously loose, the wheel should be removed and checked.

(3) Brake inspection. Usually when checking the hub bearing, attached to check the wheel brake device, if there is oil mark inside the tire, it is likely to be caused by the brake sub-pump or brake tubing oil leakage, should be found out in time, to be excluded.