Condition check, removal and installation of assembly of the parking brake. BMW the 5th E28/E34 series (from 1981 to 1993 of release)
Repair of BMW E28 and series E34 from 1981 to 1993
1. Cars of the BMW brand of 5-series
2. Engine
3. Cooling system
4. Power supply system
5. Ignition system
6. Control systems of the engine and decrease in toxicity of the fulfilled gases
7. System of production of the fulfilled gases
8. Coupling
9. Manual box of gear shifting (RKPP) and automatic transmission (AT)
10. Transmission line
11. Steering and suspension bracket
12. Brake system
12.1. General information
12.2. General information on anti-blocking brake system
12.3. Replacement of blocks of disk brake mechanisms
12.4. Removal, major maintenance and installation of a support of the disk brake mechanism
12.5. Survey, removal and installation of a brake disk
12.6. Replacement of boots of drums of brake mechanisms
12.7. Removal and installation of the main brake cylinder
12.8. Condition check, removal and installation of the vacuum amplifier of brakes
12.9. Description, removal and installation of the vacuum hydraulic booster of brake system
12.10. Replacement of a cable (cables) of a drive of the parking brake
12.11. Adjustment of the parking brake
12.12. Condition check, removal and installation of assembly of the parking brake
12.13. Adjustment of a pedal of a brake
12.14. Check and adjustment of the switch of a stoplight
12.15. Survey and replacement of brake lines and hoses of hydraulic system of brakes
12.16. Pumping of hydraulic system of brakes
12.17. Diagnostics of malfunctions of brake system
13. Body
14. Control body sizes
15. Heater and air conditioner
16. System of onboard electric equipment
17. Routine maintenance of the car
18. Size table and adjusting data
19. Schematic electric circuits
20. Governing bodies and operation receptions
21. System of onboard diagnostics - a principle of functioning and codes of malfunctions
 








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12.12. Condition check, removal and installation of assembly of the parking brake

Overlays of boots of the parking brake on models with disk back brake mechanisms can be made from asbestosoderzhashchy materials. Pay attention to the Prevention at the beginning of the Section Replacement of boots of drums of brake mechanisms. At service of these components do not create a dust a friction or polishing of slips.

The system of the parking brake should be checked regularly. Having put the car on a hill, cock the parking brake, establish neutral transfer and check, whether one parking brake can, at the released brakes, to hold the car (during check you should be in the car). However every two years, or in case of suspicion on malfunction, it is necessary to survey assembly of the parking brake.

 PERFORMANCE ORDER

  1. Поддомкратив the car and having established it on axial support, remove back wheels.
  2. On models with drum-type back brake mechanisms make usual procedure of check of thickness of overlays of the brake boots, described in Head Routine maintenance of the car.
  3. On models with disk back brake mechanisms remove back disks as it is described in the Section Survey, removal and installation of a brake disk. Suspend support assemblies on a clothes hanger or a thick wire; do not disconnect brake lines from a support.
  4. At the removed disk components of the parking brake become well visible, and they can be surveyed on existence of signs of wear and damages. Usually service life of slips same, as at the car. However they can wear out, if the system of the parking brake is badly adjusted, or if the parking brake is constantly used for a car stop. There is no minimum admissible value of thickness of overlays for boots of the parking brake, but practice shows that if it less than 1.5 mm, it is necessary to replace slips. Check also springs and the mechanism of adjustment and survey a drum on existence of deep scratches or other damages.

Removal and installation

The procedure given below belongs only to models with disk back brake mechanisms. The system of the parking brake on models with drum-type back brake mechanisms is an integral part of assembly of the back brake mechanism (see. Section Replacement of boots of drums of brake mechanisms).


 PERFORMANCE ORDER

  1. Release bolts of fastening of back wheels, поддомкратьте a back of the car and reliably establish it on axial support. Remove back wheels. Remove brake disks (see. Section Survey, removal and installation of a brake disk). Work at the same time only with one party of the car that another could serve as a sample at assembly and not to mix a detail.
  1. Remove a coupling spring of the bottom boot (diagonal nippers since they well grasp a spring are thus used, but it is necessary to be careful not to damage a spring).
  1. Remove a coupling spring of the top boot.
  1. Remove holding springs of boots.
  1. Remove brake boots.
  1. Installation make upside-down. Upon termination of work it is necessary to establish the executive mechanism correctly between two boots, as is shown in a photo (the nave is removed for descriptive reasons).
  1. After installation of a brake disk adjust boots of the parking brake. Temporarily get two bolts of fastening of wheels, turn a regulator and move apart boots so to block a disk, then turn it in the opposite direction so that boots did not brake (see. Section Adjustment of the parking brake). Establish bolts of fastening of wheels and tighten them with demanded effort.


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12.11. Adjustment of the parking brake
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12.13. Adjustment of a pedal of a brake