Hub bearing is an important vehicle walking machine. Hub bearing bears the friction reducing chassis operation, maintaining the normal running of the vehicle's responsibility. If the wheel bearing out of the failure, may cause noise, bearing heating phenomenon, especially the front wheel is more obvious, easy to cause the direction out of control and other dangerous phenomenon. Therefore, wheel hub bearing must be scheduled maintenance.
1, wheel hub bearing inspection (1), check the wheel hub bearing tightness, the bridge automobile wheel hub end of the bridge, with a car stool, wood and other appliances mask the car safely stand good. (2), the number of rotating wheel circle with the hand, have a look whether rotation is smooth, whether abnormal noise. If the rotation is not smooth and the friction sound, the braking part is not normal; if there is no noise, unstable rotation and when, the bearing part is not normal. Should be overhauled the hub of the abnormal phenomenon. For a small car, check the wheel hub bearing, with the lower hold the tire, the tire hands back and forth, repeated many times. If normal word, should not loose and block feeling; if the wobble has obvious loose feeling, should be overhauled wheels.
(3), a brake inspection of the. Used to check the wheel hub bearing, check with the wheel brake device, if there is oil, tyres, is likely to be a brake branch pump or brake oil pipe caused by oil spills, should identify the reasons, be excluded.
2, wheel hub bearing maintenance When removing the wheel hub, hub maintenance should be done the preparatory work, the car stopped and set up the bridge, in order to ensure the maintenance operation safety. (1), remove the wheel shaft of a decorative cover, dust cover;
(2), remove the tire and tire nut, notice don't damage the tire bolt thread. If the disc brake, the brake should be removed, and then used pliers remove lock ring or a lock pin. (3), with special tool remove hub;
(4), scrape off the old grease bearings, shaft and hub cavity, cleaning wheel hub bearing and shaft neck and dried with a cloth with a cleaning agent, then wipe with a cloth wheel hub cavity.
(5), check the wheel hub bearing and the bearing seat, found a crack, fatigue spalling and roller bearing loose phenomenon, should replace the bearings. If there is pitting bearing seat, also should replace the bearings.
(6), with the inner diameter of the bearing and the shaft neck inspection, clearance shall not be more than 0.1Omm measuring axis neck, should be two parts in the vertical on the ground (the largest measurement of wear parts). If the clearance is in excess of the prescribed limit of use, should replace the bearings, the clearance to return to normal. {HotTag} does not allow the deburr, in the shaft neck point to narrow the gap. (7), all parts are in line with the requirements, the inner bearing with grease into the hub.
(8), attention should be paid to the bearing cavity with grease, grease into the bearing should be in until the grease out of the bearing from the other side. Apply a thin layer of grease on the hub cavity and the head cover, which plays the role of anti rust. Note grease not hub cavity smear too much, otherwise it will affect the heat and braking. (9), the hub and bearing assembly back shaft neck, hand shaft end of the adjusting nut, and then use the shaft of the torque required to tighten the nut wrench. Tighten the nut, should turn right or left wheel around, have a look the bearing installation; on the other hand, through the rotation of the bearing and the seat with the correct. This bearing the appropriate firmness, the wheels rotate freely and not feel the axial clearance.
(10), finally arranged locking plate, fixing nuts, tire, dust cover and a decorative cover parts. (11), wheel bearing adjustment well, driving a mileage (about 1Okm), stop to check, for wiping touch wheel temperature, if fever, as bearing adjustment caused by tight, should be re adjusted, appropriate to relax the tension of bearing.