Saab 9-5

Since 1997 of release

Repair and car operation

The general information and security measures

The general information

Forward and back wheels of all cars considered in the present Management are equipped by disk brake mechanisms. The system of antiblocking of brakes (ABS) is regularly established. As the additional equipment the system of stabilisation of stability (ESP) can be established.

The brake system is divided under the diagonal scheme into two independent hydraulic contours and consists of the main brake cylinder (ГТЦ), the vacuum amplifier and disk brake mechanisms of all wheels. At refusal of any of contours (for example, as a result of hermetic sealing infringement) the second continues to function in a normal mode, providing adequate braking of a vehicle. The role of the valve-regulator of the pressure providing dynamic updating of effort of braking of back wheels according to change of loading on a back axis of the car, carries out the block of management ABS. Pressure of a liquid in both contours is created having тандемную a design by the main brake cylinder (ГТЦ). Activation ГТЦ occurs at squeezing of a pedal of a working brake.

The short description of principles of functioning of system ABS is resulted in Section Brake system.

The tank with a brake liquid is fixed on ГТЦ. The amplifier of brakes accumulates a part of the vacuum created in the inlet pipeline of the engine. To provide sufficient depression for work of the vacuum amplifier of models 2.0 and 2.3 l with АТ since 1999 вып. On them the additional vacuum pump resulted from a final camshaft is established. On models till 1999 вып. The electric vacuum pump which is joining at falling of depression more low 0.35 атм and switched off at depression above 0.4 атм was established. Pressure is traced by the gauge located in the inlet pipeline. For depression maintenance at necessary level, i.e. isolation of the vacuum pump from the inlet pipeline, the return valve located in a vacuum line is used. Models since 2001 вып. For depression increase in the inlet pipeline are completed эжектором, built in an air line турбокомпрессора. Эжектор copes by means of increase in speed of a stream of air passing through a tube of Venturi, increasing depression in the vacuum amplifier of brakes.

The lay brake with a manual lever drive influences through cables on special башмачные the assemblages which are a part of disk brake mechanisms of back wheels.

Security measures

The brake liquid is among highly toxic and chemically aggressive connections and at contact with кузовными panels destroys a paint and varnish covering.

The dust developed in the course of wear process brake колодок, can contain unhealthy the person asbestos, - at all do not inhale it at clearing of brake mechanisms!

Work with brake system demands special cleanliness and exact observance of instructions. In the absence of necessary experience it is expedient to address on HUNDRED.

At movement on wet roads it is necessary to press periodically a pedal of a brake for removal of a moisture from brake disks; In the course of rotation of a wheel the moisture under the influence of centrifugal force is dumped from brake disks, but there is a silicone film, products истирания rubbers, greasing and the other pollution reducing efficiency of braking!

The disk brake mechanisms damaged by corrosion at braking create the effect of jolting which is not disappearing in due course. In that case it is necessary to replace disks.

Dirt burning to a surface brake колодок lead to formation of furrows on a surface of brake disks that leads to decrease in efficiency of braking.