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 conical bearing 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) with a special tool to remove the wheel hub;
(4) scrape bearings, journal and hub cavity of the old grease, cleaning wheel 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, single direction thrust ball bearing 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. If 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.
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