E30 series BMW 3

since 1983-1994 of release

Repair and car operation

+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engine
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. Exhaust system
+ 8. Transmissions
+ 9. Coupling
- 10. Brake system
   10.2. Specifications
   10.3. Anti-blocking system (ABS)
   10.4. Blocks of disk brakes
   10.5. Support of a disk brake
   10.6. Brake disk
   10.7. Blocks of drum-type brakes
   10.8. Main cylinder of brakes
   10.9. Vacuum amplifier of brakes
   10.10. Cable (ы) hand brake
   10.11. Adjustment of the hand brake
   10.12. Mechanism of the hand brake
   10.13. Brake pedal
   10.14. Switch of a signal of braking
   10.15. Hoses and lines of a hydraulic actuator of brakes
   10.16. Air removal from a hydraulic actuator of brakes
+ 11. Running gear
+ 12. Body
+ 13. Electric equipment
+ 14. Good advice


10.15. Hoses and lines of a hydraulic actuator of brakes


Hoses and lines of a hydraulic actuator of brakes should be checked through each 20000 km or each 2 years (that will come earlier).


Lift the car and establish on supports, then check flexible hoses on existence of cracks, swellings, leaks and other damages. It is an important and vulnerable part of brake system and consequently it should be checked carefully. Metal tubes should be checked on corrosion existence. If on hoses or tubes there are specified damages, replace them.

Replacement of flexible hoses

1. Clear hose tips. Prepare the suitable container for liquid draining after a hose detachment.
2. To disconnect a hose from a tube, hold a key a hose for six-sided лыски on a hose tip (the right bottom arrow), and release an union nut on a metal tube (the right top arrow) by means of a cap natural a cut. If the nut does not turn away, dig on it getting liquid. After a hose detachment from a metal tube, remove a spring bracket and disconnect a hose from an arm.
3. Disconnect flexible hoses from a support having turned out them. Muffle an opening in a support.
4. Installation is carried out upside-down. Be convinced that arms of a good condition and lock-nuts are reliably tightened. Replace a spring bracket if it does not hold a hose.
5. Be convinced that hoses do not adjoin to suspension bracket and steering details, having asked the assistant to turn a wheel in both parties against the stop.
6. Upon termination of remove air from a hydraulic actuator (see subsection 10.16).

Replacement of metal brake tubes

At replacement of tubes of the highway of a hydraulic actuator always establish the tubes acquired in car-care center of the manufacturer.

The tubes delivered in the spare part by the manufacturer, straight lines, in a place are not curved. For giving of the corresponding form it is necessary to use the trubogibny device.

1. Lift the receiver and carefully measure length for which pick up new and bend in accuracy on the removed. The minimum radius of a bend should not be less than 14 mm. Track safety of a covering of tubes at are flexible.
2. At installation be convinced that the new tube in accuracy keeps within the same brackets, as removed and that between a tube and the moving or warmed-up parts there are sufficient gaps.
3. Upon termination of remove air from a hydraulic actuator.