The scheme of dynamic balancing of the driveline
If parts of the driveline were replaced during the repair, then its balancing is required. Dynamic balancing of cardan shafts in the assembled state is carried out on a special stand.
At a speed of 5500 min–1 the largest allowable unbalance on supports A, B, C should not exceed 1.71 N·mm (175 gf mm) , and when checking the balancing - 2.15 N·mm (220 gf mm).
Balancing is achieved by welding metal plates 25 (see fig. cardan gear).