Pic. 193. Vacuum booster:
1 - flange for fastening the tip; 2 - amplifier housing; 3 - stock; 4 - cover; 5 - piston; 6 - amplifier mounting bolt; 7 - remote ring; 8 - support cup of the valve spring; 9 - valve; 10 - valve support cup; 11 - support cup of the return spring; 12 - protective cap; 13 - holder of the protective cap; 14 - pusher; 15 - air filter; 16 - valve return spring; 17 - valve spring; 18 - housing cover seal; 19 - retaining ring; 20 - thrust plate; 21 - buffer; 22 - valve body; 23 - diaphragm; 24 - return spring of the valve body; 25 - rod seal; 26 - a bolt of fastening of the main cylinder; 27 - holder of the stem seal; 28 - adjusting bolt; 29 - hose tip; 30 - valve; A - vacuum cavity; B - channel connecting the vacuum cavity with the internal cavity of the valve; C - channel connecting the internal cavity of the valve with the atmospheric cavity; E - atmospheric cavity.
Repair of the vacuum booster is carried out at specialized enterprises equipped with special stands for disassembling and checking for leaks after assembly. Therefore, operations for disassembling, assembling and repairing the vacuum booster are not given. If the following operational problems occur due to the vacuum booster becoming inoperable, replace it, except when it is not necessary to completely disassemble it, for example, when replacing the air filter and protective cap, or putting grease in the booster housing seal.