BMW 7_ая the E38 series from 1994 to 2002
1. Introduction
2. Governing bodies and operation receptions
3. Settings and routine maintenance of the car
4. Engine
5. Systems of cooling of the engine, heating, ventilation and air conditioning
6. A power supply system and production of the fulfilled gases
7. Systems of electric equipment of the engine
8. Manual box of gear shifting and coupling
9. Automatic transmission
10. Kardanny and power shafts, reducer, differential and stupichny assemblies
11. Brake system
11.1. General information and security measures
11.2. Replacement of brake shoes
11.3. Removal and installation of brake disks
11.4. Removal and installation of supports
11.5. Replacement of brake shoes of the parking brake and their razzhimny mechanism
11.6. Adjustment of the parking brake
11.7. Removal and installation of cables and pedal of a drive of the parking brake
11.8. Removal Д/В of stoplights and pedal of a working brake
11.9. Removal and GTTs installation and its tank
11.10. Removal and installation of the one-pass valve of the vacuum amplifier
11.11. Removal and installation of the vacuum amplifier
11.12. Removal and installation of wheel sensors
11.13. Removal and installation of the electronic control unit of ABS/ASC+T/DSC systems
11.14. Removal and installation hydromodulator of ABS/ASC+T/DSC systems
11.15. Removal and installation of sensors of cross-section acceleration of DSC3
12. Suspension bracket and steering
13. Body
14. Onboard electric equipment
15. Electric equipment schemes


11-tormoznaya-sistema.html

11. Brake system

Specifications

General information

Brake system With double diagonal division of contours, with disk brake mechanisms of all wheels
Pressure in brake lines, atm
  • At effort to pedals of a brake of 500 N (the engine is switched off)
28 ÷ 33
  • At effort to pedals of a brake of 200 N (the engine is started)
75 ÷ 90
The maximum admissible pressure drop during 2 mines 8 %
Maximum admissible difference of thickness 0.01
Roughness (Ra) of working surfaces of brake disks and drum of the parking brake, micron 0.5 ÷ 3.5
Thickness of overlays of brake shoes at turning on of the alarm system about their wear, mm 3.0
Minimum thickness of frictional overlays of the parking brake, mm 1.5
Diameter of a drum of the parking brake, mm 180
Radial palpation of a working surface of a drum of the parking brake, mm 0.1

Brake mechanisms of forward wheels

External diameter of a brake disk, mm
Models 725tds, 728i/iL, 730d, 730i/iL, 735i/iL 316
Models 740i/iL 324
Models 740d, 750i/iL 334
Minimum thickness of brake disks, mm
Models 725tds, 728i/iL, 730d, 730i/iL, 735i/iL 26.4
Models 740i/iL 28.4
Models 740d, 750i/iL 30.4

Brake mechanisms of back wheels

Axial palpation of a working surface of a brake disk (on the greatest diameter), mm
At the established disk 0.2
At the removed disk 0.04
External diameter of a brake disk, mm
Models 725tds, 728i/iL, 730d, 730i/iL, 735i/iL, 740i/iL 324
Models 740d, 750i/iL 328
Minimum thickness of brake disks, mm
Models 725tds, 728i/iL, 730d, 730i/iL, 735i/iL, 740i/iL 10.4
Models 740d, 750i/iL 18.4

Efforts of a tightening of carving connections, Nanometer

Brake drum/disk to a wheel nave 16
Support (forward) to a rotary fist 110
Support (back) to the longitudinal lever to a suspension bracket/support of the bearing of a wheel 67
Directing finger of a support 30
The wheel brake cylinder to directing brake shoes of a back wheel 10
Directing back brake shoes to the longitudinal lever to a suspension bracket/support of the wheel bearing 65
Couplings of brake tubes and hoses 18
Brake hose to a support 19
GTTs to the vacuum amplifier of brakes 26
The ABS control unit to the hydromodulator 3
The pressure sensor to the hydromodulator 20
The wheel sensor to a rotary support/support of the wheel bearing 9
The sensor of cross-section acceleration to a body 8.6


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