automotive repair and maintenance hub industry 双列角接触球轴承|3056轴承-pg电子官方网站

automotive wheel bearing repair and maintenance of what is important automotive wheel bearings walking parts. wheel bearings reduce friction bears chassis when operating , maintaining normal driving task. if a wheel bearing failure , may cause 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 scheduled for maintenance.
1 automotive wheel bearing checking
(1 ) check the tightness of wheel bearings , first inspected the car at one end of the wheel hub axle set up , with the support car stool , wood and other appliances to cover the car safely stand a good car .
( 2 ) rotate the wheel turns inspected 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 the rotation is not smooth when ebbed and flowed , indicating that the bearing part is not normal. when the above irregularities should be dismantling the hub . for small cars, checking wheel bearings, with both hands up and down the side of the tire, the tire pulled his hands back and forth , repeat several times. if normal, then there should be no feeling of songkuang and arrest ; if there are obvious songkuang swing feel , should be overhauled wheels.
( 3 ) check the braking areas . usually when checking wheel bearings, check the wheels with brakes, tires if there are traces of oil inside , probably the brake cylinder or brake lines caused by the oil spill , it is timely to identify the reasons , be excluded.
2 automotive wheel bearing maintenance before demolition wheels, wheel maintenance should do the preparatory work , parked the car and set up the axle to ensure the maintenance of safe operations.
( 1 ) remove the hub shaft head decorative cover , dust cover ;
( 2 ) remove the tire and tire nut , 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 locking pin .
( 3 ) with a special tool to remove the hub ;
( 4 ) scrape bearings, journal and hub cavity old grease , cleaning wheel bearings and journal with a cleaning agent and wipe with a cloth , wipe with a cloth wheels last cavity .
( 5 ) check the wheel bearings and bearing races , found cracks, fatigue spalling and other phenomena loose roller bearings , replace bearings. if you find pitting on the bearing race , it should replace the bearings .
when cope with the situation ( 6 ) check the bearing bore and the journal , with the gap should not exceed 0.10mm measuring journal , should be in the upper and lower parts of the vertical ground ( where the largest wear parts ) measurements. if used with the gap exceeds the limit , replace the bearings, so back to normal with the gap . burr is not allowed to play , pitting the journal to narrow the gap .
(7 ) subject to all parts meet the requirements, apply grease to the bearing after release hub .
when ( 8 ) apply grease to the bearing cavity attention should grease the bearing until grease to squeeze until the smoke from the other side of the bearing . in the hub and shaft cranial cavity apply a thin layer of grease to make it play a role in rust . note that the hub cavity smear of grease do too much , otherwise it will affect the cooling and braking.
( 9 ) the hub and outer bearing back onto the journal , hand -axis head adjustment nut and shaft torque wrench required to tighten the adjusting nut . after tightening the nut , turn the wheel a few times to be around to see the bearing installation ; on the other hand , by turning the bearing and seat properly fit. at this time bearing tightness appropriate wheels to rotate freely and not feel the axial clearance.
( 10 ) finally, in order to install the locking plate , lock nut , tires, dust cover and decorative cover and other parts.
( 11 ) after adjusting wheel bearings , with some mileage ( about 10km), stop and check for temperature swab touched wheels , if fever, is caused by the bearing adjustment too tight , should be re- adjusted , proper relaxation bearing tightness .