The device, service and Kia Clarus/Credos repair - 19.11. Check of the vacuum amplifier of brakes//KIA Klarus / Kredos of 1995-2001 - doska-parketnaja.ru

Kia Clarus/Credos

1995-2001 of release

Repair and car operation



KIA Klarus
1.1. Periodicity of maintenance
+ 2. FE DOHC engines and Т8 DOHC
+ 3. Greasing system
+ 4. Cooling system
+ 5. Power supply system and release
+ 6. Fuel system
+ 7. Ignition system
+ 8. Coupling
+ 9. Mechanical transmission
+ 10. АКП G4A–EL
+ 11. АКП 50–40 LE
+ 12. Axes and power shafts
+ 13. Steering
+ 14. Wheels and tires
+ 15. Suspension bracket
+ 16. Body
+ 17. Central air
+ 18. Electric equipment
- 19. Brake system
   19.1. Specifications
   19.2. Pumping of hydraulic system of a drive of brakes
   19.3. Check of brake tubes and hoses
   19.4. Replacement of brake hoses
   19.5. Height of installation of a pedal of a brake
   19.6. Free wheeling of a pedal of a brake
   19.7. Distance of a pedal of a brake from a floor
   19.8. Brake pedal
   19.9. Check of the switch of a stoplight
   19.10. Main brake cylinder
   19.11. Check of the vacuum amplifier of brakes
   19.12. Forward disk brake
   19.13. Back disk brake
   19.14. Pressure regulator
   19.15. Parking brake
   19.16. Anti-blocking system of brakes (ABS)
   19.17. List of codes of malfunctions of brake system
   19.18. Precautions at carrying out repair
   19.19. Pumping of hydraulic system of a drive of brakes
   19.20. Hydraulic control unit (HCV)
   19.21. ABS control unit
   19.22. Sensors of frequency of rotation of a wheel
   19.23. Rotor of the forward sensor
   19.24. Main survey
   19.25. Check of functionality
   19.26. Search and elimination of malfunctions
+ 20. Electric circuits





19.11. Check of the vacuum amplifier of brakes

Check without the measuring device

Stage 1

PERFORMANCE ORDER
1. At the switched-off engine several times press a brake pedal.
2. Holding a pedal pressed, start up the engine.
3. If the pedal of a brake moves down at once after engine start-up, it testifies to normal operation of the vacuum amplifier of brakes.

Stage 2

PERFORMANCE ORDER
1. Start up the engine.
2. In 1–2 minutes stop the engine.
3. Press a brake pedal with usual effort.
4. If the first course of a pedal – a long and second course is shorter, than the first course, it testifies to normal operation of the vacuum amplifier of brakes.
5. Otherwise, check the unilateral vacuum valve or a vacuum hose on absence of damages and check reliability of their fastenings.

Stage 3

PERFORMANCE ORDER
1. Start up the engine.
2. Press a brake pedal with usual effort.
3. Stop the engine.
4. Slowly press a pedal of a brake and hold it pressed during 30 pages.
5. If the height of a pedal does not change, the vacuum amplifier of brakes works normally.
6. Otherwise, check the unilateral vacuum valve or a vacuum hose on absence of damages and check reliability of their fastenings.

If malfunction still is not eliminated, execute more detailed survey, using a manometer and the vacuum gage.

Check by means of the measuring device

Connect a manometer, a measuring instrument of vacuum and a pressure force measuring instrument on a pedal, as is shown in drawing. After air removal from a manometer carry out the test according to 3 points given below.


Prevention

Use sensors available on sale and a pressure force measuring instrument on a pedal.


а) Check of reduction of vacuum

Not loaded condition

PERFORMANCE ORDER
1. Start up the engine.
2. Switch off the engine when indications of a measuring instrument of vacuum become equal 500 mm Hg.
3. Watch indications of a measuring instrument of vacuum during 15 pages. If they are in limits of 475-500 mm Hg, the system means is serviceable.

The loaded condition

PERFORMANCE ORDER
1. Start up the engine.
2. Press a brake pedal with effort of 196 N.
3. Holding a pedal pressed, switch off the engine when indications of a measuring instrument of vacuum will make 500 mm Hg.
4. Watch indications of a measuring instrument of vacuum during 15 pages. If indications of a measuring instrument of vacuum are in limits of 475-500 mm Hg, the system is serviceable.

b) Check of hydraulic pressure

PERFORMANCE ORDER
1. If at the switched-off engine (vacuum of 0 mm Hg) pressure of liquid corresponds to the requirements provided below, the system is serviceable.

Force of pressing a pedal Pressure of liquid
196 N 1,177 kPas
2. Start up the engine. Press a brake pedal when indications of a measuring instrument of vacuum will make 500 mm Hg. If pressure of liquid corresponds to the requirements provided below, the system is serviceable.

Force of pressing a pedal Pressure of liquid
196 N 1,177 kPas