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Viewing, protection and protection of "hub wheel bearings"
Source: China Bearing Network Time: 2013-01-17
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(2) Change the number of wheels to be inspected by hand; see if the transition is stable; whether there is abnormal noise. If the transition is unstable and there is a conflicting sound; clarify that the brake is not normal, if there is no noise; It is smooth and tight when it is tight; it clarifies that the bearing is somewhat abnormal. The wheel should be dismantled when the above abnormal image is presented. About small cars; when looking at the hub bearing; grasp the upper and lower sides of the tire with both hands; Do it repeatedly. If it is normal; there should be no feeling of looseness and blockage. If it is shaking, there is a feeling of looseness; the wheel should be removed.
(3) Viewing the brake. Usually when looking at the hub bearing; check the wheel brake device by the way; if there is oil on the inside of the tire; it may be caused by the oil leakage of the brake cylinder or the brake oil pipe; Clear reason; to be removed.
2. The protection of the hub bearing is before the hub is disassembled; the preparation of the hub protection should be done; the car should be stopped and the axle should be set up to ensure the safety of the protection operation.
(1) Remove the embellishment cover and dust cover of the hub shaft head, (2) Remove the tire nut and tire; pay attention not to hurt the thread of the tire bolt. If it is a disc brake; remove the brake; Remove the lock ring or lock pin.
(3) Remove the hub with a special tool, (4) scrape off the old grease in the bearing, journal and hub cavity; remove the hub bearing and journal with a scavenger and wipe dry with a cloth; finally wipe the hub cavity with a cloth .
(5) Look at the hub bearing and the bearing race; find the appearance of cracks, fatigue and looseness of the bearing roller; replace the bearing. If it is found that there is pitting on the bearing race; also replace the bearing.
(6) Check the cooperation between the inner diameter of the bearing and the journal; the cooperative clearance should be no more than 0. 1Omm when measuring the journal; should be the largest wear part in the upper and lower parts of the vertical ground.) If the cooperation gap exceeds the rule The limit of application; should replace the bearing; make it recover normal cooperation gap. It is not allowed to burr and pitting on the journal to reduce the gap.
(7) After all the parts meet the requirements; the inner bearing is modified into grease and placed in the wheel hub.
(8) Pay attention to the grease in the bearing cavity; squeeze the grease into the bearing until the grease comes out from the other side of the bearing. Apply a thin layer in the hub cavity and the shaft cap. Grease; make it anti-rust effect. Pay attention to the grease in the hub cavity, do not change too much; otherwise it will affect heat dissipation and braking.
(9) Put the hub and outer bearing back on the journal; screw the shaft adjustment nut by hand; then tighten the adjusting nut with the shaft wrench according to the regular torque. After tightening the nut; turn the wheel a few turns left and right; The condition of the bearing device, on the other hand; after the transformation, the bearing and the seat ring cooperate correctly. At this moment, the bearing tightness is appropriate; the wheel is free to change and no axial gap is felt.
(10) Final sequence of locking pieces, fixing nuts, tires, dust cover and embellished cover parts. (11) After the hub bearing is adjusted; travel a distance (about 1Okm); parking view; used to wipe the wheel hub The temperature; if it is heat; the adjustment of the bearing is too tight; should be adjusted from the beginning; properly loosen the bearing tightness.
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