Examination
1. To check the operation of the vacuum booster, press the brake pedal several times. Then without releasing the pedal, start the engine. When the engine starts, the pedal should "go ahead" and the pedal should feel loose. Let the engine run for at least two minutes, then turn off the ignition. It should take a normal amount of effort to depress the pedal, but as you depress further, the pedal should become more "tight" and with each press, the pedal travel should decrease.
2. If the booster does not operate as described, first check the vacuum valve as described in paragraph 12.
3. If after checking the valve the amplifier does not work, the fault is in the vacuum amplifier itself. The amplifier cannot be repaired - if it malfunctions, replace it entirely.
Removing
Note: New mounting nuts are required for installation.
4. Remove the brake master cylinder as described in paragraph 11.
5. Turn away a fastening nut and disconnect a vacuum hose from the vacuum amplifier; see paragraph 12.
6. Remove the lower panel from the instrument panel on the driver's side as described in Chapter 11.
7. Remove the cotter pin and pull out the pin that secures the brake pedal to the pusher of the vacuum booster.
8. Loosen and remove the four brake booster mounting nuts, then return to the engine compartment and remove the brake booster from the vehicle.
Installation
9. Before installation, check the condition of the gasket that is glued to the back of the vacuum booster. If the gasket shows signs of wear or damage, cut it off and glue a new one on.
10. Install the vacuum booster in place in the engine compartment.
11. Operating from salon, combine a pusher of the vacuum booster with a brake pedal, then establish and tighten with the demanded effort of a nuts of fastening of the booster.
12. Apply a layer of grease to the vacuum booster pusher pin and secure it with a cotter pin.
13. Install the lower part of the instrument panel on the driver's side (see chapter 11).
14. Connect a vacuum hose to the amplifier and tighten a fastening nut with the demanded effort.
15. Install the master cylinder as described in paragraph 10. Upon completion, start the engine and eliminate air leaks in the vacuum hose connections to the amplifier; check the operation of the brake system while driving.