Truck wheel hub bearing lubrication and maintenance specification process

2020 - truck wheel hub bearing lubrication and maintenance specification process 03 - 25 the author further across the country all pit, found that the domestic many repair site for truck wheel hub bearing maintenance process is not standard, the author for the maintenance of the master and friends card sorting specification maintenance process is as follows: 【 1 】 Remove the wheel shaft head of the decorative cover, dust cover. 【 2 】 Remove the tire nut and tires, be careful not to tire bolt thread bruised. If it is a disc brake, should remove the brake, pliers remove the locking collar or lock pin. 【 3 】 Remove the wheel hub with specialized tools. 【 4 】 Scrape off the bearing, shaft and hub cavity old grease, clean with cleaner wheel hub bearing and shaft neck and dried with a cloth, finally cloth rub-up wheel hub inner cavity. 【 5 】 Check the wheel hub bearing and the bearing race, found a crack, the fatigue spalling and bearing roller is loose wait for a phenomenon, should replace the bearing. If found a pit on the bearing race, should also be replaced. 【 6 】 Check the bearing inside diameter and shaft neck to cooperate, fit clearance should not be greater than zero. 10mm。 When measuring axle neck, should be in the vertical ground fluctuation two parts ( The place for the biggest wear parts) Measurement. If the use of fit clearance in excess of the prescribed limits, a bearing should be replaced, restore normal fit clearance. Don't allow on the shaft neck burr, pitting to narrow the gap. 【 7 】 After being all parts meet the requirements, will be within the bearing with the new wheel hub bearing special grease into the wheel hub. 【 8 】 The bearing inner cavity should be paid attention to when daub grease, grease should be packed into bearing inner until issued from the other side of the bearing grease. Within the hub cavity and shaft epicranium apply a thin layer of grease, rust sealed effect. Note hub cavity don't apply too much grease, advice, it is better not more than two thirds otherwise will affect the heat dissipation and braking, cause waste grease and failure. Must pay attention to maintain the environment clean, avoid dust, magazines with grease. 【 9 】 Outside the hub and return to the journal bearing is installed, adjust the shaft head nut screw on with the hand, and then with the shaft head wrench torque tighten the adjusting nut according to the rules. After tighten nut, should turn right or left wheel hub, see bearing installation; On the other hand, by rotating bearing and the seat right to cooperate. The bearing appropriate tightness, felt by the free rotation of the wheels is not out of the axial clearance. 【 10 】 Finally installed in turn lock plate, a fixed nut, tire, dust cover and decorative cover, etc. （ Source: grease information platform)