To replace the shock absorber, we hang out the wheel and support the rear axle beam with a rack so that the shock absorber shrinks a little.
Two keys "at 19" unscrew the self-locking nut securing the lower eye of the shock absorber.
We take out the bolt with washers and the spacer sleeve.
key "at 19" unscrew the self-locking nut securing the upper eye of the shock absorber and..
... remove the shock absorber along with rubber bushings.
Install the shock absorber in the reverse order of removal.
Similarly, we replace the second shock absorber.