Before removing wheels, wheel maintenance should do the preparatory work, the car parked and set up axles, in order to ensure the maintenance of security operations. (1) Remove the hub shaft head decorative cover, dust cover; (2) Remove the wheel nuts and tires, be careful not to bruise the tire bolt threads. If disc brakes, the brake should be removed, and then used pliers to remove the lock ring or locking pin. (3) china bearings with a special tool to remove the wheel hub; (4) scrape bearings, journal and hub cavity of the old grease, cleaning wheel china bearings and journal with detergent and wipe dry with a cloth, wipe with a cloth wheels last cavity. (5) Check the wheel bearings and bearing races, found cracks, fatigue spalling and loose roller bearings and other phenomena, 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 0.1Omm measuring journal, should be in the upper and lower parts of the vertical ground (where the largest wear parts) measurements. slim bearings used with the gap exceeds the limit, replace the bearing, so back to normal with the gap. Burr is not allowed to play, pitting the journal to narrow the gap. (7) Upon completion of all parts meet the requirements, the inner bearing grease after release hub. When (8) grease the bearing cavity attention should be squeezed into the bearing grease until grease to date to emerge 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 do not apply too much grease, otherwise it will affect the cooling and braking. (9) the hub and the outer bearing back onto the journal, hand-axis head adjustment nut, and then use the required shaft torque wrench to tighten the adjustment nut. After tightening the nut, Taper bearing 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, fixing nut, tires, china bearings dust cover and decorative cover and other parts. (11) wheel bearings adjusted, with some mileage (about 1Okm), stop and check for swab touch wheel temperature, if fever, is caused by the bearing adjustment too tight, should be re-adjusted appropriately relaxed bearing tightness.
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