4.3.19. Check of degree of wear of brake shoes, disks and drums
It will be required to you: caliper or ruler.
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Note
If when braking the car takes away aside or extraneous noise is heard, check a condition of brake shoes.
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1. Install the car on the elevator or a jack (supports).
2. Remove a forward wheel.
3. Check through an opening in the case of a brake bracket a condition of blocks. If thickness of frictional overlays of less admissible (tab. 4.4), replace brake shoes (see. "Replacement of brake shoes of the brake mechanism of a forward wheel").
Table 4.4 Sizes of brake shoes, disks and drums, mm
4. Measure thickness of a brake disk. If its thickness of less admissible (see tab. 4.4), replace a brake disk (see. "Replacement of a brake disk").
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Note
On cars with disk back brake mechanisms similarly check degree of wear of brake shoes and a brake disk of the back brake mechanism.
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5. For check of degree of wear of brake shoes of the back brake mechanism remove a back wheel and the brake drum (see. "Removal and installation of the brake drum").
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6. Measure thickness of a frictional slip together with the basis. If thickness of less admissible (see tab. 4.4), replace blocks (see. "Replacement of brake shoes of the back brake mechanism").
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Note
Replace blocks in the following cases:
– thickness of frictional slips is less than 1,5 mm;
– the surface of slips is greasy;
– slips are unsteadily connected to the basis.
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7. Measure diameter of a working surface of the brake drum. If it is more admissible (see tab. 4.4), replace a drum (see. "Replacement of the brake drum").