Examination
1. To check, press the brake pedal several times to release the vacuum, and while holding the pedal down, start the engine. As soon as the engine starts, a clear movement of the pedal in the pop should be felt, as the vacuum builds up. Let the engine run for a couple of minutes and turn it off. If now when you press you feel "hard" the pedal and further pressing make it even harder, reducing its travel - the amplifier is working.
2. If the amplifier is not operating as directed above, check the amplifier check valve as described in paragraph 13. On diesel engines, also check the operation of the vacuum pump as described in paragraph 20.
3. If the amplifier does not work now, then the malfunction is hidden inside itself. Since the amplifier is collapsible only in principle, no spare parts are supplied for it - a faulty amplifier must be replaced entirely.
Withdrawal
4. Remove the brake master cylinder as described in paragraph 10.
5. Carefully tip the vacuum hose out of the booster, being careful not to damage the seal.
6. Turn away screws of fastening and remove a box for trifles from under the front panel from the driver's side.
7. Under the front panel, find the servo rod and note the way it is connected to the brake pedal. On right-hand drive models, the stem is connected to a lever mounted to the left of the clutch pedal. On left-hand drive models, it is attached directly to the pedal. In both cases, the stem is swiveled to disengage the stem from the pedal/lever, depress the swivel latches and lift the brake pedal to disengage the stem swivel.
8. Remove the Toex bolts securing the servo to the pedal bracket and motor shield.
9. Remove the amplifier from the engine compartment. Remove the gasket. installed between the amplifier and the shield. Replace damaged gasket.
Installation
10. Before installation, check the adjustment of the booster rod. After removing the gasket, check the size (pic. 12.10). If adjustment is required, the size can be changed. unscrewing the locknut and turning the stem. After completing the adjustment, tighten the locknut.
11. Clean the mating surfaces of the amplifier and shield, install the gasket, then the amplifier.
12. From the passenger compartment, make sure that the rod and pedal are properly articulated by snapping the hinge. Raise the pedal with your hand to make sure the articulation is secure.
13. Install the servo amplifier mounting bolts and tighten them to the specified torque.
14. Adjust the position of the brake light contact sensor as described in paragraph 17.
15. Place the storage box under the front panel.
16. Gently insert the vacuum hose tip into the booster being careful not to damage the seal.
17. Install the master cylinder as described in paragraph 10.
18. Bleed the hydraulic system as described in paragraph 2.
19. Bleed the brake hydraulic system as described in chapter 6.
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