Wheel bearing is what to do routine maintenance
Car wheel bearings are important parts of the walk. Wheel bearings reduce friction bears chassis operation, and maintain a normal car driving task. If a wheel bearing failure, may result in the phenomenon of noise, bearing fever, especially the front wheel is more obvious, easily lead to runaway direction dangerous phenomenon. Therefore, wheel bearings must be maintained on schedule.
1. Check the wheel bearings
(1) Check the wheel bearings tightness, the first end of the vehicle inspected hub wheel axle set up, with the support vehicle stool, wood and other appliances to cover the car a good car safely stand.
(2) the subject of a wheel turned by hand a few laps to see if the rotation is stable, if there is no abnormal noise. If the rotation is not smooth and friction sound, indicating that the brake part is not normal; if there is no noise, and when the rotation is not smooth ebbed and flowed, indicating the bearing portion is not normal. When the above abnormal phenomenon should be dismantling the hub.
For a small car, check wheel bearings, with both hands up and down the side of the tire, the tire flip back and forth with both hands, repeated many times. If normal, then, should not feel Songkuang and block; if there are obvious Songkuang swing feel, should be overhauled wheels.
(3) Brake aspects of the inspection. Typically when checking wheel bearings, with check wheel brakes, if there are traces of oil inside of the tire, probably the brake cylinder or brake lines caused by oil spills, it is timely to identify the reasons, be excluded.
2. Maintenance of wheel bearings
Before removing the wheel, the hub should be prepared to care preparations, parked the car and set up a bridge in order to ensure the maintenance of security operations.
(1) Remove the hub axle head of decorative cover, dust cover;
(2) Remove the wheel nuts and tire, be careful not to bruise the tire bolt threads. If the disc brakes, the brake should be removed and then used pliers to remove the lock ring or lock pin.
(3) use special tools to remove the hub;
(4) scrape bearings, journal and hub cavity of the old grease, clean the wheel hub bearing and the journal with detergent and dry with a cloth, and finally with a cloth to wipe the hub lumen.
(5) Check the wheel bearings and the bearing ring, a crack is found, fatigue spalling and other phenomena loose roller bearings, replace bearings. If you find pitting on bearing race should also replace the bearings.
When mated condition (6) Check with the journal bearing diameter, with the gap should not be greater than 0.1Omm measuring journal, should be in the upper and lower parts of the vertical ground (where the maximum wear parts) measurements. If you use with the gap exceeds a predetermined limit, replace the bearing, so back to normal with the gap. Allowed deburring, pitting in the journal to narrow the gap.
(7) After all the parts are in line with the requirements of the grease inside the bearing smear release hub.
Should (8) the bearing cavity smear grease attention should be squeezed into the bearing grease until grease come so far out from the other side of the bearing. In the hub cavity and shaft bonnet Apply a thin layer of grease to make it function as rust. Note that the hub cavity grease do not apply too much, otherwise it will affect the cooling and braking.
(9) the hub and the outer bearing back onto the journal by hand axis head adjustment nut, then use wrench shaft torque required to tighten the adjustment nut. After tightening the nut, turning left and right wheels laps should see bearing installation; on the other hand, by turning the bearing race and the right fit. At this time bearing tightness appropriate wheel to rotate freely and not feel the axial clearance.
(10) Finally, followed by installation of the locking plate, fixing nut, tires, dust cover and decorative cover and other parts.
(11) wheel bearings adjusted, with some mileage (1Okm so), stop and check for swab touch wheel temperature, if fever, is caused by too tight bearing adjustment, readjust, appropriate to relax bearing tightness
