To check up
| PERFORMANCE ORDER |
| After dismantle it is necessary to clear and examine carefully brake drums on presence of cracks, scratches, deep flutes, and also to check up deviations from крутости (ovality) and цилиндричности (конусность). |
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CRACKS, SCRATCHES, FLUTES ON THE SURFACE OF THE FRICTION OF THE DRUM
The brake drum with cracks is subject to replacement as does not provide safely сти the car. It is forbidden to make cracks on a drum. Small scratches and risks should be smoothed. In the presence of deep defects of a surface of a friction of a drum service life колодок strongly reduces ся. In this case it is required to pierce a working surface of a drum. If колодки малоизношены, and on a surface of a friction of a drum there are small flutes, it is necessary to grind a drum thin наждачной a skin. To chisel a drum in this case it is not necessary. Full removal of flutes from a surface of a drum and crests on overlays can demand removal too a material considerable quantity. Meanwhile, earned extra to each other a drum and колодки, having small flutes and crests, provide quite satisfy тельную work of brake mechanisms. At replacement колодок the drum having flutes, should be pierced. Will occur differently not only fast deterioration new колодок, but also functioning of brake system will worsen.
OVALITY AND КОНУСНОСТЬ THE BRAKE DRUM
And конусность a brake drum brake mechanisms do not allow to adjust ovality correctly and cause the accelerated deterioration of details. Ovality of a brake drum can lead also to fast and non-uniform deterioration of a protector of the tyre and a pulsation of effort on a brake pedal at braking. At достиже нии maximum deviations on ovality and конусности the drum should be chiseled for restoration of the correct form. Ovality, конусность and deterioration of a brake drum is supervised by means of internal a micromeasure. Measurements of the sizes of the cylinder of a drum make in two perpendicular sections at edge and about a drum disk. |