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 printable version
Service servo (servo) brakes
Refitting Withdrawal | - Remove the GTZ with the car.
- Disconnect the vacuum hoses from the power of the vacuum amplifier.
- Remove the retaining clip, bend the tabs of the plastic stopper, remove the fixing pin and remove the plunger from the brake pedal.
- Give servo mounting nuts and move aside the support bracket of the control valve, remove the amplifier from the vehicle.
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Setting Installation is in the reverse order. | - Check the adjustment of the vacuum booster pushrod, if necessary, make adjustments. Check the height of the position and size of a free wheeling of the brake pedal, if necessary, adjust the parameters listed.
- Tighten fixing nuts with demanded effort.
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Checking operation | - When the engine is stopped squeeze the brake pedal a few times to reset the vacuum from the vacuum amplifier.
- Gently squeeze out a pedal and hold it in this position.
 | - Start the engine. The pedal should markedly fall down. Otherwise, check the operation of the vacuum feed to the unit (see. Accompanying illustration):
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- Check the vacuum hoses for signs of aging of the material and other damage. Replace defective.
- Disconnect the vacuum hose from the servo unit and running the engine at idle, check the presence of a vacuum hose plugged end of the thumb.
- Disconnect vacuum hoses, release the fastening clamp and remove the check valve from the block of the vacuum amplifier.
- Blow into the valve from the vacuum amplifier. Air should pass freely.
- Try prososat the same air through the valve opening. At this time, the valve must be closed. If any abnormalities, replace the check valve.
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Adjusting the pusher | - Remove the servo from the car.
- Connect the hose connection on the unit equipped with a vacuum gauge a hand vacuum pump.
- Create a vacuum tube amplifier vacuum depth of 500 mm Hg. Art. and measure the amount of protrusion A pusher above the landing surface of the GTZ (see. accompanying illustration). The nominal value is A = 10.275 ÷ 10.525 mm.
- If necessary, adjust the length of the pusher, achieving the desired amount of its protrusion.
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