Withdrawal vacuum booster on a car with an ABS system, carry out in the following order:
- remove the wire «–» from the output of AB;
Pic. 328. AB compartment partitions (shown by arrows)
- remove partitions of compartment AB (pic. 328);
- remove the noise insulation in the engine compartment of the engine;
- remove AB;
- remove the expansion tank of the cooling system;
- disconnect the multi-pin connector for indicating the temperature of the coolant and unscrew the two bolts;
- unscrew two bolts and remove the right partition of the AB compartment;
- unscrew one bolt and remove the left rear bulkhead of the AB compartment. Set the expansion tank aside;
- disconnect the plug on the brake fluid reservoir cap and unscrew the reservoir cap;
- remove the spring clamp and disconnect the multi-pin connector from the ABS-ECU;
Pic. 332. Layout of parts with ABS installed: 1 - vacuum brake booster; 2 - tank; 3 - tank cover with brake fluid emergency level sensor terminals; 4 - float; 5 - nuts, 8 Nm; 6 - holder; 7 - rubber damper; 8 - bolt, 8 Nm; 9 - the place of connection of the brake pipeline of the left front wheel to the valve body; 10 - the place of connection of the brake pipeline of the right rear wheel to the hydraulic unit; 11 - self-locking nut, 25 Nm; 12 - main brake cylinder; 13 - circuit pipeline «left front - right rear brakes» from the main brake drive to the hydraulic unit; 14 - circuit pipeline «right front - left rear brakes» from the main brake cylinder to the hydraulic block; 15 - hydraulic block; 16 - the place of connection of the brake pipeline of the left rear wheel to the valve body; 17 - the place of connection of the brake pipeline of the right front wheel to the valve body; 18 - ECU - ABS
- mark with adhesive tape (on which the numbers are written) and disconnect from the hydroblock 15 (pic. 332) brake pipelines 9, 10, 16 and 17 front and rear wheels;
- close the openings at the pipelines and at the hydroblock to prevent leakage of liquid and the ingress of dust and dirt into them;
- unscrew the fastening bolts and remove the valve body together with the ABS-ECU in an upward movement;
- using a siphon pear, pump out the brake fluid from the reservoir and remove the master brake cylinder;
- disconnect the vacuum hose going to the vacuum brake booster;
- remove the lower casing of the instrument panel from the driver's side;
Pic. 329. Disconnecting the thrust rod of the vacuum brake booster from the brake pedal: 1 - spring clamp; 2 - connecting pin
- remove spring clamp 1 (pic. 329), then remove the connecting pin 2 and disconnect the push rod of the brake booster vacuum booster from the brake pedal;
- unscrew the four nuts securing the vacuum brake booster and remove it.
Installation vacuum booster in the reverse order of removal.
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