7.1.3. Adjustment of the drive of a brake


Fig. 7-3. Brake pedal: 1 — the vacuum amplifier; 2 — a pusher; 3 — a brake pedal; 4 — the stoplight switch buffer; 5 — a switch nut; 6 — the stoplight switch; 7 — an ottyazhny spring of a pedal; 8 – main cylinder

The free wheeling of a pedal of a brake at the idle engine has to make 3–5 mm. This size is received, regulating position of the switch 6 (fig. 7-3) of a stoplight.

Fig. 7-2. Vacuum amplifier: 1 — a flange of fastening of a tip; 2 — the case of the amplifier; 3 — a rod; 4 — a cover; 5 — the piston; 6 — a bolt of fastening of the amplifier; 7 — a remote ring; 8 — a basic cup of a spring of the valve; 9 — the valve; 10 — a basic cup of the valve; 11 — a basic cup of a returnable spring; 12 — a protective cap; 13 — a holder of a protective cap; 14 — a pusher; 15 — the air filter; 16 — a returnable spring of the valve; 17 — a valve spring; 18 — a case cover sealant; 19 — a lock ring of a sealant; 20 — a persistent plate; 21 — the buffer; 22 — the valve case; 23 — a diaphragm; 24 — a returnable spring of the case of the valve; 25 — a rod sealant; 26 — a bolt of fastening of the main cylinder; 27 — a rod sealant holder; 28 — an adjusting bolt; 29 — a hose tip; 30 — valve; And — a vacuum cavity; In — the channel connecting a vacuum cavity to an internal cavity of the valve; With — the channel connecting an internal cavity of the valve to an atmospheric cavity; Е — an atmospheric cavity

If the switch of a stoplight is brought excessively closer to a pedal, then it does not come back to a starting position, the valve 9 (see fig. 7-2), nestling on the case 22, separates cavities of A and E, and there is an incomplete disinhibition of wheels at the released pedal.
Position of the switch of a stoplight is regulated by its movement at the released nut 5 (see fig. 7-3). Establish it so that the stoplight buffer slightly concerned a pedal emphasis, at the same time the free wheeling of a pedal has to be 3–5 mm. Upon termination of adjustment tighten a nut 5.

PREVENTION
You make adjustment of a free wheeling of a pedal of a brake at the idle engine.

If movement of the switch of a stoplight did not possible to eliminate an incomplete disinhibition of brake mechanisms, then disconnect the main cylinder of the drive of brakes from the vacuum amplifier and check a vystupaniye of an adjusting bolt 28 (see fig. 7-2) concerning the plane of fastening of a flange of the main cylinder (the size 1,25 — 0,2 mm). This size can be established, holding with a special key the end of a rod 3, and other key turning or unscrewing a bolt 28.