If the mechanism works with a good pace it announces success and prosperity. If it stops there will be delays in our plans and projects. If it works badly, breaks or fails or if an accident occurs that foretells failure and complications.
Dream dictionary: Mechanism dream meanings
…Receiving a threat in a dream means victory over one’s assailant, oppo- nent, or adversary, or it could mean developing a defence mechanism against any danger from that side. If the threat comes from an unknown person, such a person is a Satan, particularly if the threat is directed against one’s prayers, charitable actions, or devotion. A threat in a dream also represents the trials of a love story. (Also see Slapping on the cheek)…
Dreaming of self-criticizing is a warning which tells you that youre adopting some incorrect behavior, hanging out with the friends, taking part in risky issues or planning or doing something wrong, either in your relationships, family, friends or business. This dream indicates that you should rethink the path in which youre going. Self-criticism in dreams is very common and shows up in mostly every dream as a kind of self-defense mechanism. It is also can be as an advice to prevent major diseases.