2.2.8. Check of vacuum system

1) remove a vacuum hose from the pump of control of level of depression
2) move connecting draft towards the vacuum amplifier against the stop
3) close the end of a vacuum hose a finger
4) connecting draft should not return to a starting position; if it comes back to a starting position, it means that the vacuum system is not tight
5) check the following elements for tightness:
  – vacuum final valves;
  – check that vacuum final valves were correctly installed;
  – vacuum amplifier;
  – vacuum hoses
6) eliminate the found leaks