Check separately the runout of the front and rear shafts, adhering to the following instructions.
Install the front shaft in the centers and, turning, check the runout, which should not exceed: on the pipe, at a distance of 70 mm from the end welds - 0.55 mm, in the center of the pipe - 0.35 mm, along the outer diameter of the splines - 0, 1 mm. Then the rear propeller shaft is installed in the centers and, turning, check its runout, which should not exceed: on the pipe, at a distance of 70 mm from the end welds - 0.55 mm, in the center of the pipe - 0.35 mm. If the runout exceeds the allowable limits, straighten the shafts under pressure. With a large runout, it is recommended to replace the shafts with new ones.
Check the circumferential play in the splined joint of the sliding fork of the front propeller shaft. It should not exceed 0.30 mm. Check the condition of the clip and the gland of the sliding clutch. If necessary, replace the stuffing box, and if damaged, the clip.
Check the condition of bearing housings, needles, cross spikes, seals, clips and forks. If the bearing housings, needles and spikes of the crosses, as well as seals or their holders are damaged or worn out, the cross is assembled with bearings.
The diameter of the hole for the needle bearing must not exceed 23.825 mm.
Check the condition of the rubber elements of the flexible coupling. In the presence of cracks or delamination of rubber from metal liners, the elastic coupling is replaced.
Check the condition of the centering sleeve of the flexible coupling. In case of significant wear or damage to the bushing, replace the flange assembly.
Determine the condition of the bearing of the intermediate support by turning the inner ring in both directions and at the same time pressing it against the outer ring. In this case, the inner ring of the bearing should rotate smoothly, without jamming. Check bearing seals. If the bearing is worn or damaged, replace it with a new one. Check for damage or deformation of the intermediate support. If necessary, replace it with a new one.