If the footprint of the gear engagement area is a little end, the spacers on the lower part (near the gear side) of the large bearing (7609E bearing) on ​​the active street wheel should be appropriately increased. If the footprint of the meshing area is near or out of the big end, the shim should be properly reduced. Manufacturers of general gears have their own specific base for the adjustment pads at the location. In addition, according to the specific circumstances of each pair of gears marked increase in how much or how much, such as marked with +2, generally should be based on the basis of the reduction of 0.2 mm pad; if marked with -20 should generally increase 0.2 mm pad sheet.
In the actual assembly process, if the large plane of the gear and differential case are all qualified, and the assembly process is clean, the run-out should not exceed 0.70mm, as the differential machine case is suitable for machine tool adjustment when large plane turning. The large plane run-out of the shell will not exceed 0.30mm, so the manufacturer's full-scale standard shall not exceed 0.05mm. However, although there is no clear regulation of the backlash of the passive gear teeth, under normal circumstances, its run-out will not exceed 0.02mm.
The abnormal sound of more than 90% of the new factory car reducer is caused by the large amount of bouncing after assembly of the driven wheel, or the position of the meshing area of ​​the driven gear. The excessive backlash of teeth backlash is mainly caused by the overshoot of the large plane runout of the differential case. The material of the shell is gray cast iron, and since the material is soft, it is easily deformed once it is bumped. The amount of swing far exceeds the amount of gear clearance, which will inevitably cause violent impact during the operation of the active and passive gears, making it impossible for oil to form an oil film on the surface of the gears, so that under normal circumstances, the use of 150,000 km of gears can reduce the service life of the gears to only 1000 km. about.
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