VW Sharan repair

. Diesel engines: 1,9 l of TDI.
+ 1. Introduction
+ 2. VR6 engine
+ 3. Two-liter engine (ADY)
+ 4. System of greasing of the engine
+ 5. Cooling system
+ 6. System of injection of fuel of the VR6 engine
+ 7. Simos system of injection of fuel of the 2,0-liter engine
+ 8. Ignition system
+ 9. Coupling
+ 10. Mechanical 5-step transmission
+ 11. Shaft of a drive of wheels
+ 12. Hydraulic booster of a steering
+ 13. Forward suspension bracket
+ 14. Back suspension bracket
- 15. Brake system
   + 15.1. Adjustment of brake system
   + 15.2. Disk brakes of forward wheels
   + 15.3. Brakes of back wheels
   15.4. Processing of brake disks
   + 15.5. Main brake cylinder
   15.6. Check of the vacuum amplifier of a brake drive
   15.7. Pumping of brakes
   + 15.8. Parking brake
   + 15.9. ABS system (anti-blocking brake system)
+ 16. Electric equipment
+ 17. Diesel engine
+ 18. System of greasing of the diesel engine
+ 19. System of cooling of the diesel engine
+ 20. Power supply system of the diesel engine and turbokompressor
+ maintenance Card
+ Specifications and characteristics
+ Elektroskhema




Repair Sharan/Sharan Volkswagen>> Brake system>> Check of the vacuum amplifier of a brake drive
The vacuum amplifier is intended for creation of the additional effort enclosed to a rod of the main brake cylinder. The vacuum in the amplifier of a brake drive is created at the expense of the lowered pressure in an inlet collector.
The vacuum amplifier is not subject to repair and is replaced in case of malfunction. If at the working engine achievement of sufficient braking needs unusually big effort to a pedal, check the vacuum amplifier of a brake drive.
Check of the vacuum amplifier carry out in the following order:
- press 5 — 6 times a brake pedal at the idle engine to create in vacuum and atmospheric chambers of the vacuum amplifier the identical pressure close to atmospheric (remove a vacuum razryazheniye);
- holding a brake pedal in the pressed situation, start the engine;
- at the serviceable vacuum amplifier the brake pedal after start of the engine should «leave forward» and weaken effort of resistance to a foot;
- if the brake pedal not «leaves forward», check tightness of a connecting hose between the inlet channel and the amplifier or serviceability of the most vacuum amplifier.
Cause of defect of the vacuum amplifier can be and the return valve. By means of a screw-driver carefully squeeze out the valve and blow it in the direction of an arrow which is beaten out on the valve. Air at a purge should leave on the other side of the valve. If to blow against the arrow beaten out on the valve, air on the contrary should not leave on the other hand. At installation the valve впрессовывается in the vacuum amplifier of a brake drive.

Prevention
The cause of defect of the vacuum amplifier of a brake drive should be looked for on HUNDRED.

Removal and installation of the vacuum amplifier without the established ABS system
Note
The description on removal and installation of the vacuum amplifier at the established ABS system is presented in item 15.9.1.

Removal - the vacuum amplifier carry out in the following order:
- remove a wire «–» from AB conclusion;

Fig. 328. Partitions of a compartment of AB (are shown by shooters)





- remove partitions of a compartment of AB (fig. 328) ;
- remove a noise isolation located in a motor compartment of the engine;
- remove AB;
- remove a broad tank of system of cooling;
- disconnect a multicontact shtekerny block of indication of temperature of cooling liquid and unscrew two bolts;
- unscrew two bolts and remove the right partition of a compartment of AB;
- unscrew one bolt and remove the left back partition of a compartment of AB. Put a broad tank aside;
- disconnect a shtekerny block on a cover of a tank of brake liquid and unscrew a tank cover;
- by means of a siphon pear pump out brake liquid from a tank and remove the main brake cylinder;
- disconnect the vacuum hose going to the vacuum amplifier of a brake drive;
- remove the bottom casing of the dashboard from the driver;

Fig. 329. A detachment of a rod of draft of the vacuum amplifier of a brake drive from a brake pedal: 1 — a spring collar; 2 — a connecting finger





- remove a spring collar 1 (fig. 329) , then take a connecting finger 2 and disconnect from a brake pedal a bar of a pusher of the vacuum amplifier of a brake drive;
- unscrew four nuts of fastening of the vacuum amplifier of a brake drive and remove it.
Installation of the vacuum amplifier carry out as it should be, the return to removal, carrying out the following:
- tighten four nuts of fastening of the vacuum amplifier the moment of 40 N · m;
- establish the main brake cylinder (see item 15.5.1);
- after installation restore liquid level in a tank and pump over hydraulic actuator system.