BMW E30
+ 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 brakes
10.8. Main cylinder of brakes
10.9. Vacuum amplifier of brakes
10:10. Cable(s) of the emergency brake
10:11. Adjustment of the emergency brake
10:12. Mechanism of the emergency brake
10:13. Brake pedal
10:14. Braking signal switch
10:15. Hoses and lines of a hydraulic actuator of brakes
10:16. Removal of air from a hydraulic actuator of brakes
+ 11. Running gear
+ 12. Body
+ 13. Electric equipment
+ 14. Useful tips
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Prevention
Disks of brakes (forward or back) have to change or be ground in couple.
Check
| PERFORMANCE ORDER |
| 1. Release bolts of fastening of wheels, lift the car and establish on supports, remove a wheel and wrap three bolts in a disk. During the work with a back brake disk turn on the emergency brake. |
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2. Remove a support, take aside and fix, without disconnecting a hose. Turn off bolts (shooters) and remove a support arm. |
| 3. Check a disk surface for existence of cracks, wear and other damages. Existence of superficial damages and slight scratches is allowed. In the presence of deep zadir, disk needs to be replaced, or to proshlifovat. If on a disk there are cracks, then replace it. |
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4. Check both parties of a disk. If at inclusion of brakes strong vibration, then, perhaps is found, disk is jarred on (beating of a disk is very big). On cars with ABS system the vibration caused by a buckling can be taken for normal work of ABS system (when pressing a pedal of a brake almost same vibration is felt, as at a faulty disk). |
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5. Check a disk beating, having established an indicator leg in 13 mm from edge of a disk and rotating a disk. If the beating exceeds norm, then replace a disk or a proshlifuyta. |
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6. The disk is recommended to be ground anyway, at least to remove roughnesses a small emery paper. |
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7. Grinding of a disk is not allowed if its thickness becomes less limit. Extreme thickness of a disk is stamped on a part of a disk which fastens to a nave. |
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Admissible sizes and beating of a disk (mm)
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CONTINUOUS DISK
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THE VENTILATED DISK
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| Admissible thickness of a disk after grinding |
11,1
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20,4
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| Maximum permissible thickness of a disk |
10,7
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20,0
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| Admissible unevenness of a disk on thickness |
0,02
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0,02
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| Admissible axial beating: |
| – The disk is removed |
0,05
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0,05
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| – The disk is established |
0,20
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0,20
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Removal
| PERFORMANCE ORDER |
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| 1. Unscrew the screw and remove a disk from a nave. |
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2. If the disk does not give in to removal, then dig the getting liquid between a disk and a nave and several minutes later remove a disk. |
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3. If the back disk does not give in to removal, then reduce blocks, having turned the thin screw-driver a regulator cogwheel. |
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Installation
| PERFORMANCE ORDER |
| 1. Carefully clear a disk, having removed traces of the getting liquid. Establish a disk on a nave and tighten the screw. |
| 2. Establish a support arm (if it is removed), brake shoes and a support. Tighten bolts and screws of all connections with the set moments. |
| 3. Establish a wheel, lower the car. Press several times a brake pedal. |
| 4. If necessary adjust blocks of the emergency brake (see subsection 10.12). |
| 5. Before departure check work of brakes. |
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