Removal, major maintenance and installation of a support of the disk brake mechanism. BMW the 5th E28/E34 series (from 1981 to 1993 of release)
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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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12.4. Removal, major maintenance and installation of a support of the disk brake mechanism

Components of assembly of a support of the brake mechanism of back wheels (for forward wheels the same)

1 — support Assembly
2 — the Bolt of fastening of a bracket
3 — the pumping Valve
4 — the Dustproof cap
5 — Protivovizgovaya a spring
6 — the Directing bolt
7 — the Wire of an alarm lamp of the sensor of wear of brake shoes
8 — a cable Clip
9 — the Brake disk
10 — the Bolt with an internal shestigrannik
11 — the Board

12 — the Bolt
13 — the Washer
14 — the Cap
15 — the Cap
16 — a support Bracket
17 — a cable Clip
18 — a piston Cuff, the piston, a dustproof cover and a lock ring
19 — the Set for repair of the directing plug
20 — Brake shoes


The dust created by brake system, can contain the asbestos harmful to your health. Never delete it by means of the compressed air and do not inhale it. At work with brakes it is necessary to put on a special filtering mask. Never, under no circumstances, use solvents on the basis of gasoline for washing of details of brakes. Use only a cleaner of brake system!


Brake liquid is poisonous. It also strongly dissolves paint. See. The prevention at the beginning of the Section Pumping of hydraulic system of brakes.


If there was a need of major maintenance (usually owing to leakage of liquid), before the beginning of work investigate all parameters of system. In many shops of auto parts it is possible to get the repaired supports on the basis of an exchange that will essentially facilitate to you work. If all of you decided to repair supports, before the beginning of work make sure that at your order there is a special set for repair. Always repair supports in pair - never do it from one them them.

Removal

 PERFORMANCE ORDER

  1. Release bolts of fastening of wheels, поддомкратьте a front or a back of the car and reliably establish it on axial support. Remove a wheel.
  2. If you remove a support only to provide access to other components, there is no need to disconnect the brake line. If you remove a support for the purpose of its major maintenance, disconnect the brake line from a support, it is desirable using a special cap (brake) wrench not to damage fittings. Stop up a tube to prevent pollution of brake system and leakage of brake liquid.
  3. Following instructions in the Section Replacement of blocks of disk brake mechanisms, remove a support is a part of procedure of replacement of brake shoes.

The support of the brake mechanism of back wheels has a design similar to a design of a support of the brake mechanism of forward wheels.

Major maintenance

 PERFORMANCE ORDER

  1. On all supports remove a lock ring of a dustproof cover, then remove a dustproof cover. Before taking the piston, place wooden whetstone between the piston and a support to protect them from damages at extraction.
  1. To take the piston from a support, submit the compressed air to a place of accession of a brake hose on the support case. Use only low pressure, for example, from the foot pump, for piston extraction from the cylinder.

Be careful, watch, that your fingers did not get between the piston and a support since the piston can leave with a significant force.

  1. Survey surfaces of the piston and a wall of the cylinder of a support. If there are any scratches, cavities, a rust or light spots, completely replace support knot.
  1. If these components in a good condition, take a piston cuff from the support cylinder by means of the wooden or plastic tool. The metal tool can damage a cylinder surface.
  1. Remove directing fingers or bolts of a support and then rubber dustproof covers.
  2. Wash out all components in methyl alcohol or in a cleaner of brake system.
  3. By means of a special set for repair from your car disassemble a support as it is described below.
  4. Lower a new rubber cuff in pure brake liquid and establish it in the bottom flute in the support cylinder, having made sure that it is not overwound.
  5. On all supports, put on walls of the cylinder and on the piston pure brake liquid and at once establish the piston into place. Do not press strongly on the piston at installation, at first make sure that it correctly rose into place, and then is firm, but is not strong, press it against the stop. Establish a new dustproof cover and a lock ring.
  6. Grease sliding surfaces of directing fingers or bolts with greasing on the basis of silicone (it usually is available in a set), establish them in a support. Establish dustproof covers.

Installation

 PERFORMANCE ORDER

  1. Installation repeats removal procedure upside-down (see. Section Replacement of blocks of disk brake mechanisms).
  2. If the brake hose was disconnected from a support, pump over brake system (see. Section Pumping of hydraulic system of brakes).


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12.3. Replacement of blocks of disk brake mechanisms
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12.5. Survey, removal and installation of a brake disk