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





Protivootkatnaja system - the device, a functioning and safety measure principle

The organisation scheme противооткатной systems

1 — ГТЦ
2 — the pressure Valve-terminator
3 — the Vacuum amplifier
4 — the Pedal of a foot brake
5 — a coupling Pedal
6 — the Cable of a drive of coupling

7 — the Valve of deduction of pressure (PHV)
8 — the Cable of drive PHV
9 — the Brake mechanism of a forward wheel
10 — the Brake mechanism of a back wheel
11 — the Module of management/hydromodulator ABS


Design of the valve of deduction of pressure (PHV)

1 — the Case
2 — the Camshaft
3 — the Ball
4 — Directing a ball
5 — the Cuff
6 — Diafragmennaja a spring
7 — Zaglushka

8 — the Pusher
9 — the Returnable spring
10 — Pylnik
11 — the Cover
12 — the Executive lever
13 — Sealing rings
14 — the Sealing ring


 Presence on the car противооткатной system does not release the driver from necessity of use of a foot and lay brake at stops on sites of road going uphill!


The protivootkatnaja system facilitates procedure трогания the car standing on lifting, providing smoothness of a start of motion even at vehicle management of the not skilled driver.

The organisation scheme противооткатной systems is presented on an illustration.

At a certain steepness of lifting when the driver at the squeezed out coupling starts to release a pedal of a foot brake противооткатная system continues to keep pressure in brake contours, preventing откатывание the car back that allows the driver to set a vehicle in motion in a usual manner, without caring of keeping by its brakes.

The valve of deduction of pressure (PHV)

The special valve of deduction of pressure is included in a line connecting ГТЦ with the hydromodulator of antiblocking system (ABS) (PHV). The valve is equipped by the camshaft rotating in both directions at turn of coupling connected to a pedal of the executive lever.

At the switched off coupling (the pedal is squeezed out) the valve pusher is wrung out by a spring to the right.

Deployment of the clown of a camshaft at release results coupling pedals отжиманию a pusher to the left with overcoming of the effort developed by a returnable spring. More to the left of a pusher rod in the directing channel equipped with a saddle клапанной assemblages the ball is located. When the car occupies horizontal position, or is inclined forward, the ball is in the left (forward) end of the directing channel. At entrance on lifting, a ball under the influence of gravitation it is rolled away back, nestling on a saddle until the coupling pedal will not be released also a pusher rod will not be displaced to the left.

During a stop on lifting the driver keeps squeezed out both pedals (a foot brake and coupling), thus a ball in the directing channel occupies extreme right position, nestling on a saddle of the valve and blocking a stream of a hydraulic liquid to the main cylinder. Before a start of motion the driver releases a pedal of a foot brake, continuing to keep a pedal of coupling squeezed out, however pressure brake contours continues to remain for the account отсекания their ball valve. Further the driver can start to release coupling with simultaneous squeezing of gas as does it at a start of motion on equal road, - camshaft rotation will lead to opening of valve PHV and отпусканию brakes.

 It is necessary to remember that activation противооткатной systems occurs only at the squeezed out pedal of coupling.


 Repeated squeezing of a pedal of coupling after partial it отпускания (for example, at refusal of attempt of a start of motion or transfer switching on lower) will not provide return PHV to a closed condition, - for реактивации systems it is necessary to squeeze out a pedal of a foot brake again! It is necessary to have also in view of that the effect of braking remains at release couplings after movement of the car by a backing at the squeezed out both pedals. The start of motion a forward course after movement by back can be accompanied by easy jerk.

On the main page