2. To connect the vacuum pump to the union of a pneumodrive of the hose going from a tee.
3. To create depression in a pneumodrive for imitation of its work on compulsory single to a course. Thus the rod should be put forward on 10 mm from edge of the directing plug. If the course of a rod less than 10 mm, means a pneumodrive is faulty also it it is necessary to replace.