Restore the normal size of the gaps between the pads and brake drums and reduce the pedal stroke using eccentrics, in which the hexagonal heads of the axles are brought out through the shield

Adjust the gaps between the pads and brake drums (current adjustment) in the following order:

  • 1. Jack up the wheel whose brake mechanism needs to be adjusted.
  • 2. While rotating the wheel, gradually turn the adjusting eccentric until the wheel brakes.
  • 3. Gradually release the eccentric, turning the wheel until it rotates freely without the drum hitting the pads.
  • 4. Adjust the gaps between the pads and drums of the remaining brake mechanisms in the same way.
Fig. 1. Adjusting the gaps between the pads and the front wheel brake drum

When adjusting the brake mechanisms of the front wheels and the front brake pads of the rear wheels, rotate the wheel forward (Fig. 1).

Fig. 2. Adjusting the gaps between the pads and the rear wheel brake drum

When adjusting the rear brake pads of the rear wheels, rotate the wheel back (Fig. 2).

To reduce the gaps, turn the eccentrics in the direction of rotation of the wheel, and to increase them, turn them against them.

5. Check while the car is moving that the brake drums do not heat up and that the brake mechanisms operate smoothly when braking.

During the current adjustment, do not use the support pins, as this will disrupt the factory settings of the pads.

When replacing friction linings, adjust the installation of the pads.

Adjust the brake mechanisms when the brake drums have completely cooled down and the wheel bearings are correctly adjusted.

Adjust the free travel of the pedal on vehicles of the UAZ-31512 family by changing the position of the stop of switch 14 (see Fig. 3) of the brake signal.

Fig. 3. Drive of the service brake system of vehicles of the UAZ-31512 family: 1 - signaling device; 2 - switch for the warning lamp of the emergency condition of the hydraulic brake system; 3 - tanks; 4 - main brake cylinder body; 5, 8 - nuts; 6 - vacuum booster; 7 - plate; 9 - pedal axis; 10 - fork; 11 - finger; 12 - pedal; 13 - stop; 14 - brake signal switch; 15 - tension spring; 16 - bracket
Fig. 11. Drive of the service brake system of vehicles of the UAZ-3741 family: 1, 20 - brackets; 2 - brake signal switch; 3 - nuts; 4 - buffer stop; 5 - pedal; 6 - intermediate fork; 7 - fork; 8 - lock nut; 9 - traction; 10 - cover; 11 - intermediate lever; 12 - tension spring; 13 - brake system emergency warning lamp switch; 14 - signaling device; 15 - main brake cylinder body; 16 - tanks; 17, 19 - nuts; 18 - vacuum booster; 21 - pusher fork

Adjust the free travel of the pedal on vehicles of the UAZ-3741 family by changing the length of the vertical rod 9 (see Fig. 4) using forks 7, having previously unscrewed the lock nuts 8.

Check the free play of the pedal when the engine is not running.

The free play of the pedal on UAZ vehicles is 5–14 mm, counting along its platform.

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The hydraulic clutch release (Fig. 1) of vehicles of the UAZ-31512 family consists of a suspended pedal 19, a master cylinder 5, a hydraulic pipe 4, a hydraulic hose 24 and a working cylinder 25

Parts and kits of nominal and repair sizes of the UAZ-3151 engine Table 1 Part or kit number – Name - Nominal or repair size (diameter), mm