Replacing the vacuum booster

You will need: keys «at 13», «at 17», end head «at 13», pliers, flat blade screwdriver…



…special wrench for brake lines «on 10».

NOTE: Because the length and shape of the brake lines prevent the master cylinder from being pulled forward by disconnecting it from the brake booster far enough to remove the booster, the booster/master cylinder assembly must be removed.

1. Remove the cap from the master cylinder reservoir..



2.... and pump out the brake fluid from the tank, for example, with a large medical syringe.




3. Remove the battery tray (cm. «Removal and installation of the shelf of fastening of the rechargeable battery»).



4. Disconnect the block from the brake fluid level sensor..



5.... and a hose to the master cylinder of the clutch release drive from the reservoir of the master brake cylinder (cm. «Replacing the reservoir of the main brake cylinder»).

USEFUL ADVICE: Immediately after disconnecting the hose from the tank, plug its hole without lowering the hose down. A certain amount of working fluid will remain in the hose, therefore, after installing the reservoir and connecting the hose to it, it will not be necessary to remove air from the clutch release hydraulic drive.

6. Unscrew the nuts securing the two pipelines to the brake force regulators, holding the regulators from turning with the second key..



7.... nuts for fastening two pipelines to the main brake cylinder..



8.... and move the pipes aside.

GOOD ADVICE: Shut off the pipelines in any way possible (for example, by putting protective caps on the ends of the valves to release air), to prevent leakage of brake fluid.

9. Prying off the tip of the vacuum hose with a screwdriver..



10.... remove the tip from the sealing sleeve of the hole in the amplifier housing.



11. In the passenger compartment under the instrument panel, squeeze the two clamps of the brake booster pusher fork with pliers with pliers..

NOTE: For clarity, operation is shown with the instrument panel and steering column bracket removed.

NOTE: This is what the servo pushrod pin pins look like.

12.... and remove the finger from the holes of the fork and pedal.



13. Turn away four nuts (the lower left nut is not visible in the photo, as it is covered by the switch bracket) fastening the vacuum booster to the bulkhead, simultaneously fastening the pedal bracket..



14.... and remove the vacuum booster assembly with the main brake cylinder.



15. In case of replacing the vacuum booster, remove the sealing gasket from the studs of its fastening and install it on the new booster..

NOTE: Replace a heavily compressed or torn gasket.

16.... unscrew the two nuts securing the brake master cylinder to the booster, remove the cylinder and install it on the new booster.

NOTE: Be sure to replace the sealing rubber ring of the brake master cylinder flange with a new one.

17. Install the brake booster and all removed parts in the reverse order of removal, fill in brake fluid and bleed air from the system (cm. «Bleeding the hydraulic drive of the brake system»).