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Check of serviceability of functioning of the vacuum brake booster
Check of serviceability of functioning of the vacuum brake booster  | | |
| - Illustrative material verification of serviceability of functioning of the vacuum brake booster is presented in the figure, which includes all the links in the text.
- Connect the vacuum gauge (030) to the brake booster (16) and a few taps on the brake pedal reset the vacuum in the vacuum path.
- Connect the tester (051) to the brake caliper.
- Connect the meter (060) to the brake pedal.
- Start the engine and a sharp releasing the accelerator pedal depressed, create a vacuum in the path of the required vacuum (0.75 ÷ 0.80 bar).
- If the vacuum falls immediately, or its depth is insufficient, check the O-ring installed between the vacuum servo amplifier and GTZ, also not ruled out the probability of failure of the control valve in the vacuum line. Check the non-return valve (see. Section Check non-return valve). Replace defective components.
- Squeezing the pedal to the required efforts, consider reading the tester. Compare results of measurements to requirements of Specifications.
- Disconnect from a pedal meter (060), disconnect the tester (051) and the vacuum gauge (030).
- Bleed the brake system (see. Section Bleeding brake system).
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