Mercedes W124

since 1985-1995 of release

Repair and car operation

W124 Mercedes
+ Governing bodies and control devices
+ MAINTENANCE
+ 2. Maintenance (diesel engines)
+ ENGINE
+ 4. Repair of 6-cylinder petrol SOHC engines
+ 5. Repair of 6-cylinder petrol DOHC engines
+ 6. Repair of the diesel engine established in the car
+ 7. Major maintenance of engines
+ COOLING SYSTEM
+ FUEL SYSTEM
+ 10. System of injection of BOSCH CIS-E fuel (KE-JETRONIC)
+ 11. System of injection of BOSCH HFM fuel
+ 12. Fuel system of diesel engines
+ 13. Fuel system of diesel engines
+ SYSTEMS OF START, IGNITION
+ 15. System of ignition of 4-cylinder petrol engines
+ 16. System of ignition of four-cylinder petrol engines
+ PRESTARTING HEATING
+ TRANSMISSION
+ 19. Mechanical transmission
+ 20. Automatic transmission
+ POWER SHAFTS
- BRAKE SYSTEM
   22.2. General information
   22.3. Pumping of hydraulic brake system
   22.4. Brake pipelines and hoses
   + 22.5. Replacement of forward brake shoes
   22.6. Replacement of back brake shoes
   22.7. Forward brake disk
   22.8. Back brake disk
   22.9. Forward brake support
   + 22.10. Support repair
   22.11. Back brake support
   22.12. Main brake cylinder
   22.13. Vacuum amplifier of brakes
   22.14. Unilateral valve of the vacuum amplifier of brakes
   22.15. Adjustment of the parking brake
   22.16. Brake shoes of the parking brake
   22.17. Pedal of the parking brake
   22.18. Cables of the parking brake
   22.19. Stoplight switch
   22.20. Anti-blocking system (ABS)
   + 22.21. Elements of anti-blocking system
   22.22. The vacuum pump on models with diesel engines
+ SUSPENSION BRACKET
+ BODY
+ ELECTRIC EQUIPMENT
+ CHECK OF MALFUNCTIONS

22.14. Unilateral valve of the vacuum amplifier of brakes

Removal

Arrangement of a connecting nut of fastening of a vacuum hose to the vacuum amplifier of brakes

PERFORMANCE ORDER

1. Unscrew a connecting nut and disconnect a vacuum hose from the vacuum amplifier of brakes (see drawing).

2. Disconnect the second end of a vacuum hose from an inlet collector or the vacuum pump and take a vacuum hose with the unilateral valve from a motor compartment.

Check

PERFORMANCE ORDER

1. Check a condition of a vacuum hose and the unilateral valve on existence of wear and mechanical damages and, if necessary, replace.

2. Check the unilateral valve of the vacuum amplifier of brakes, blowing it in two directions. Air should pass through the valve only from the vacuum amplifier of brakes.

Installation

PERFORMANCE ORDER

1. Arrange a vacuum hose with the valve in a motor compartment, then connect it to an inlet collector or the vacuum pump. Connect the second end of a hose to the vacuum amplifier of brakes and fix it a connecting nut, having tightened it the demanded moment.

2. Start the engine and check tightness of connections of a vacuum hose.