Larger heavier wheels, unable to set the standard in the repair of the bearing clearance, but also unable to detect the axial bearing clearance asked. However, bearing a certain gap must be left to keep the shaft and bearings, wheel hub and bearing the correct installation location when the thermal expansion room. Usually Dongfeng, liberation, and more than 2 tons of truck, when the 20-25 kg m torque and tighten the bearing adjusting nut while turning the wheel drum, the bearing is properly seated, it will loosen the nut 1/4-1 / 3 ring, oil seal ring fitted, lock washers, then tighten the outer nut to 25-30 kg m torque tightening. If there is no torque wrench, tire pry bar can be special casing fastening. Reliable way to the gap bearing left, to extend bearing life.
If the wheel bearings (wheel hub bearing) adjusted properly, will the following two phenomena:
1, the bearing clearance is too small or no gap, wheel running sharp rise in temperature within the bearing, rolling bearing research will be destroyed face, bearing inner race also will be rotated, leading to a vicious damage to the bearings, the wheels have serious swing and bounce ;
2, the bearing clearance is too large, the wheel bearing is not running properly in place. Roller bearing face and non-normal scroll bar, so the wear on the bearing plus AAA. AAA speed, the wheel will also have serious swing and beat.
These two phenomena lead to deterioration of seal oil seal wheel, the brake failure or delay hysteresis brake, axle damage, axle and axle casing wear and tear damage and deformation.
