Subaru Legacy/Outback

1999-2003 of release

Repair and car operation



Subaru Legasi, Autbek
+ Cars Subaru Legacy, Outback
+ The operation manual
+ Routine maintenance
+ The engine
+ Systems of cooling, heating
+ The power supply system and release
+ Engine electric equipment
+ Manual box and differential
+ Automatic transmission
+ Coupling
- Brake system
   Specifications
   Brake mechanisms of forward and back wheels - the general information
   Lay brake - a design and a functioning principle
   The pressure valve-terminator - a design and a functioning principle
   Protivootkatnaja system - the device, a functioning and safety measure principle
   System of antiblocking of brakes (ABS) - the general information, a functioning principle
   System of dynamic stabilisation (VDC) - the general information, a functioning principle
   Check of a condition replacement колодок disk brake mechanisms of forward wheels
   Removal, check of a condition and installation of forward brake disks
   Removal, service and installation of disk brake mechanisms of forward wheels
   Check of a condition and replacement колодок disk brake mechanisms of back wheels
   Removal, check of a condition and installation of back brake disks
   Removal, service and installation of disk brake mechanisms of back wheels
   Removal, service and installation of the main brake cylinder (ГТЦ)
   Removal, installation and check of serviceability of functioning of the vacuum amplifier of brakes
   Removal, installation and check of serviceability of functioning of the valve-terminator of pressure
   Replacement of a brake liquid
   Prorolling of a hydraulic path of brake system
   Check of a condition and replacement of flexible brake hoses
   Check of a condition and replacement of tubes of a brake path
   Removal, service, installation and adjustment of a pedal of a foot brake
   Removal, condition check, installation and adjustment of the gauge-switch of stoplights
   Removal, installation, check of a condition and adjustment of the lever of a drive of a lay brake
   Removal, check of a condition and installation of elements тросового a drive of a lay brake
   Removal, installation and adjustment of the mechanism of a lay brake
   Removal, installation, check of a condition and adjustment of components противооткатного devices
   Removal, installation and check of serviceability of functioning of assemblage of the module of management/hydromodulator ABS
   Check of sequence of operation of valves of hydromodulator ABS
   Removal, installation and check of serviceability of functioning of forward wheel gauges ABS
   Removal, installation and check of serviceability of functioning of back wheel gauges ABS
   Removal, installation and check of a condition of rotors of wheel gauges
   Removal, installation and diagnostics of the gauge of overloads (G-gauge)
   Problem diagnostics ABS
   Removal, installation and adjustment of the module of management VDC
   Removal, installation and check of serviceability of functioning of hydromodulator VDC
   Check of sequence of operation of valves of hydromodulators ABS and VDC
   Removal, installation and check of serviceability of functioning of the gauge of withdrawal / cross-section overloads
   Removal, installation and check of serviceability of functioning of the gauge of an angle of rotation of steering wheel VDC
   Removal, installation and check of serviceability of functioning of wheel gauges from rotors
   Removal, installation and check of serviceability of functioning of the switch of deactivation VDC (VDC OFF)
   Problem diagnostics VDC
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment





Brake system

The general information

The scheme of hydraulic connections of a brake path

1 — Hydraulic lines of a contour of brake mechanisms of forward wheels
2 — the pressure Valve-terminator
3 — the Flexible brake hose of the brake mechanism of the right forward wheel
4 — the Flexible brake hose of the brake mechanism of the left forward wheel
5 — the Central section of a hydraulic path
6 — the Double-thread socket
7 — Hydraulic lines of a contour of brake mechanisms of back wheels
8 — the Connecting hose of a hydraulic contour of the left back wheel
9 — the Steel tube of a hydraulic contour of the left back wheel
10 — the Flexible brake hose of the brake mechanism of the left back wheel

11 — the Connecting hose of a hydraulic contour of the right back wheel
12 — the Steel tube of a hydraulic contour of the right back wheel
13 — the Flexible brake hose of the brake mechanism of the right back wheel
14 — the Transitive tube

Efforts of a tightening of carving connections, Nanometer

Т1: 15
Т2: 18


Design ГТЦ of models without VDC

1 — the Tank of a hydraulic liquid
2 — the Secondary hydraulic chamber (chamber S)
3 — the Primary hydraulic chamber (chamber)

Design ГТЦ of models with VDC

1 — the Tank of a hydraulic liquid
2 Secondary hydraulic chamber (chamber S)

3 Primary hydraulic chamber (chamber)


Principle of functioning of the gauge-switch of level of a brake liquid

1 — the Control lamp
2 — Jazychkovyj the switch

3 — the Constant magnet


Design of the vacuum amplifier of brakes

1 — the Pusher
2 — the Returnable spring
3 — the Jet plate
4 — the Clamp
5 — the Filter
6 — Shumopoglotitel

7 — the Executive rod
8 — Tarelchatyj the valve
9 — the Case клапанной assemblages
10 — Plunzhernyj the valve
11 — Diafragmennaja a plate
12 — the Returnable spring of the valve


The scheme of the organisation of a drive of a lay brake

 


All models of cars considered in the present Management are equipped by hydraulic brake system with vacuum strengthening. Both on forward, and on back wheels of the car brake mechanisms of a disk design are established.

All brake mechanisms are equipped by self-regulators.

The hydraulic system consists of two independent contours, - forward and back. In default one of the contours, the second continues to function, providing the car adequate braking. The scheme of connection of hydraulic lines of brake system is presented on an illustration.

The special control lamp built in in an instrument guard notifies the driver on infringement of serviceability of functioning of brake system, and also about excessive falling of level of a brake liquid.

The main brake cylinder (ГТЦ)

ГТЦ it is established on assemblage of the servo-driver of the vacuum amplifier of the brakes, fixed on a back partition of an impellent compartment. From above the big tank of a hydraulic liquid equipped with a tight plastic cover is located on the cylinder.

ГТЦ has the dual design providing functioning of two independent hydraulic contours. Pressure of a liquid in each of contours is forced by the individual piston in the main cylinder.

Inside tightly executed tank GTTS the gauge-switch of level of a liquid is built in. At lowering of level of a brake liquid below some limit the gauge-switch provides operation built in in a combination of devices of a control lamp. The Gauge-switch has язычковую a design with the constant magnet built in a float and is is normal-opened. Until the float settles down above язычкового the switch, the contour of a control lamp remains opened. At falling of level of a liquid approximately on 30 mm below the maximum mark the float is combined with the magnet built in it with язычковым the switch, providing activation of the last and, accordingly, short circuit of a chain of a control lamp.

 The strong list and rocking of the car during movement can lead short-term operations of a control lamp.


The vacuum amplifier of brakes

The amplifier uses depression created in the inlet pipeline for increase of efficiency of functioning of a hydrodrive of brake system. The servo-driver of the vacuum amplifier is fixed on a back partition of an impellent compartment in the last. The vacuum amplifier enters into a standard complete set of all models «8 inches + 9 inches».

Lay brake


The trosovyj drive of a lay brake is brought to brake mechanisms of back wheels of the car, - приводные cables fasten to executive levers of brake boots of a lay brake.

Protivootkatnaja system


The protivootkatnaja system serves for simplification трогания the car standing on lifting (Razdel Protivootkatnaja system - the device, a functioning and safety measure principle see).

System of antiblocking of brakes (ABS)


ABS prevents premature blocking of wheels of the car at sharp braking (the Section System of antiblocking of brakes (ABS) - the general information, a functioning principle see).

System of dynamic stabilisation (VDC)


VDC (the Section System of dynamic stabilisation (VDC see) - the general information, a functioning principle) provides increase of stability of movement of a vehicle at movement on a slippery road covering or fulfilment of the sharp maneuvers connected, for example, with a detour of obstacles in high speed. In the work VDC uses functions ABS and, besides functions of direct appointment, carries out also function антипробуксовочной monitoring systems/monitoring systems (TCS).

Service of brake system

On termination of any of procedures of the service, connected with removal or dismantling any of components of brake system without fail check efficiency of functioning of brake system and, only having made sure of full serviceability of its operation, start car operation. Trial runs should be made on a pure dry and equal road covering.

Check efficiency of braking of a vehicle on various speeds of movement and various efforts of squeezing of a pedal of a foot brake. The car should be braked in regular intervals, keeping thus course stability. Try not to suppose the premature blocking of wheels fraught with loss of the control over management.

Remember that to number of the factors affecting efficiency of braking of a vehicle, the condition and pressure of a rating of tyres, level of loading of the car and correctness of geometry of a suspension bracket concern.

Safety measures

At service of components of brake system of cars it is necessary to observe some special safety measures:
a) For refuelling of brake system use only a hydraulic liquid of class DOT 3;
b) Frictional overlays of brake kolodok/boots can contain unhealthy asbestos. Try not to inhale a brake dust, do not blow off its compressed air. To rubbing of components of brake mechanisms apply only special cleaning structures;
c) Watch observance of all demanded admissions and efforts of a tightening of fixture. At service of components use only the serviceable tool. At the slightest doubts address for the help to experts. Remember that serviceability of functioning of brakes is traffic safety pledge;
d) At the slightest signs of infringement of serviceability of functioning of brake system car operation should be suspended!
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