Hydraulic brake booster [Toyota Carina T170]

The brake booster is installed between the brake pedal and the master cylinder. The master cylinder is mounted on the outer surface of the brake booster. The booster cannot be disassembled or repaired. Special tools are required for disassembly, and the booster can only be tested using a vacuum tester. Failure of the booster does not cause brake failure, but only increases the force required to brake on the brake pedal. If it is necessary to remove the booster, disconnect the brake pipes from the brazed brake cylinder, disconnect the vacuum hose and remove the brazed brake cylinder. Disconnect the pushrod from the brake pedal (remove the cotter pin and cotter pin hoop) and remove the hydraulic booster mount and the brake booster nipple. Figure 263 shows the method for fastening the brake booster.

Fig. 263. Fastening the master brake cylinder and brake booster. 1. Union nuts, 15 Nm; 2. Throne; 3. Union nuts, 15 Nm; 4. Nut. 13 Nm; 5. Master brake cylinder; 6. The gasket is always replaced; 7. Clamp clamp; 8. Nut, 13 Nm; 9. Vacuum hose; 10. Power steering; 11. Split pin; 12. Fork head; 13. Bracket; 14. Nut. 13 Nm; 15. Gasket, always replaceable; 16. Connector, liquid level.

If a new power steering unit is installed, the length of the push rod of the device must be adjusted. This requires a special tool (09737-00010), shown in Figure 264. Place the template on the upper side of the master brake cylinder and turn the adjusting bolt in the middle of the template until it touches the piston of the master brake cylinder. Without moving the template bolt, place the template on the surface of the power steering and use a feeler gauge to measure the gap between the push rod and the template adjusting bolt. If the gap is more than 0-0.4 mm, loosen the fastening - the lock nut of the push rod adjuster and move the rod so that the required gap is ensured. After adjustment, tighten the lock nut.