11.9. Wear degree assessment, replacement of blocks of disk brake mechanisms of forward wheels

Wear degree assessment


  1. Original brake shoes are equipped with indicators of wear of frictional slips. The wire indicator released from under a slip body begins to rub during braking about a disk surface, publishing high-frequency squeal, - immediately replace blocks.
  1. Visual assessment of degree of wear of frictional overlays of blocks of forward brake mechanisms can be made through special observation ports in back walls of supports (see an illustration), - the minimum admissible thickness makes 2.0 mm, - in case of need replace blocks.
  2. In case of need remove blocks and make more detailed studying of their state, - measurement of thickness of a frictional slip is performed from the basis of a metal substrate (see an illustration).


For rubbing of components of brake mechanisms it is necessary to use special means, or methyl alcohol, - at all do not apply solvents on an oil basis!

Blocks should be made in a set for brake mechanisms of both forward wheels.


  1. Hang out the car above the ground and remove forward wheels.
  2. Turn out couple of directing bolts and remove a support of the brake mechanism, - without disconnecting a flexible brake hose tie up a support to suspension bracket elements.
Reversing of the directing bolts of the brake mechanism of a forward wheel.
The removed support follows, without disconnecting from it a flexible brake hose, to tie up to suspension bracket elements.

Will be to turn out only the lower directing bolt alternatively enough and to cast away a support up, having developed it rather top bolt.

  1. Take old blocks from an anchor bracket of the brake mechanism.
  1. By means of a special clamp wring out the working piston of a support in the wheel cylinder.
  1. Fill new brake shoes in an anchor bracket, - track correctness of placement of a spring clamp.
  2. Lower a support on the regular place, screw the directing bolt(s) and tighten them with the required effort.
  3. Working in a similar manner, replace blocks of the second brake mechanism.
  4. Establish to the place of a wheel and lower the car on the earth.