E39 series BMW 5

since 1996-2001 of release

Repair and car operation



E39 BMW
+ Introduction
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Systems of cooling, heating
+ Power supply system and release
+ engine Electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
- Brake system
   Anti-blocking system
   Removal and installation of forward brake shoes
   Removal and installation of a brake disk / support of a forward brake
   Removal and installation of back brake shoes
   Removal and installation of back brake supports
   Removal and installation of a brake disk of back wheels
   Measurement of thickness of a brake disk
   Brake liquid
   Air removal from brake system
   Replacement of brake pipelines
   Replacement of a forward brake hose
   Check of the vacuum amplifier of a brake
   Removal and installation of brake shoes of the parking brake
   Adjustment of the parking brake
   Removal and installation of the lever of the parking brake
   Removal and installation of a cable of the parking brake
   Check and replacement of the switch of a stoplight
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ electric equipment Schemes
+ System of onboard diagnostics





Check of the vacuum amplifier of a brake

If for achievement of necessary brake effort it is necessary to make considerable effort a brake pedal, it is necessary to check the vacuum amplifier of a brake.

 PERFORMANCE ORDER

1. Press a brake pedal at the idle engine not less than 10 times. Then, without releasing a pedal, start the engine. Thus pressure of a pedal of a brake under effort of a foot should weaken. In this case the vacuum amplifier is serviceable.
2. Otherwise disconnect a vacuum hose from the amplifier and start the engine. Put a finger by the end of a vacuum hose and check, whether there is a vacuum.
3. If the vacuum is not present: Check tightness of a vacuum hose and existence of damages. If necessary replace. Tighten all collars.
4. Diesel engine: Disconnect a vacuum hose from the vacuum pump and check a finger vacuum existence.
5. If the vacuum is: Measure value of vacuum. If necessary replace the vacuum amplifier (work HUNDRED).

Thus surely replace the return valve in the vacuum pipeline since the diaphragm in the amplifier can be damaged owing to penetration паров fuels (at the petrol engine and the damaged return valve). Shooters on the return valve should specify in the direction of the inlet pipeline.