E46 series BMW 3

since 1998 of release

Repair and car operation



E46 series BMW 3
+ BMW 3 Cars (Е46)
+ Current leaving and service
+ Engine
+ Systems of cooling, heating
+ Power supply systems, injection and release
+ engine Electric equipment
+ RKPP and transmission line
+ Automatic transmission
+ Coupling and power shafts
- Brake system
   Removal and installation of brake shoes of forward wheels
   Removal and installation directing a forward brake
   Removal and installation of a brake disk of a forward wheel
   Removal and installation of brake shoes of disk brakes
   Removal and installation of a bracket of a brake of back wheels
   Removal and installation of a brake disk of a back wheel
   Measurement of thickness of a brake disk
   Brake liquid - the main data and security measures
   Air removal from brake system
   Replacement of the brake pipeline
   Replacement of a forward brake hose
   Check of the amplifier of a brake
   Removal and installation of blocks of the parking brake
   Adjustment of the parking brake
   Removal and installation of the lever of the parking brake
   Removal and installation of a cable of a drive of the parking brake
   Removal and installation of the switch of a stoplight
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ electric equipment Schemes



2d97642e


Removal and installation of brake shoes of disk brakes

Support of a back disk brake

1 — a support
2 — directing brakes
3 — a spring lock
4 — a bolt, 65 N • m
5 — the union of removal of air
6 — a dustproof cap

7 — a directing finger
8 — a protective stopper
9 — the wear sensor
10 — a sealing set of a support
11 — a repair kit of the directing plug
12 — brake shoes (not containing asbestos)


 REMOVAL

1 Mark paint the provision of back wheels concerning a nave. It will allow to establish at assembly otbalansirovanny wheels in their former situation. Weaken bolts of fastening of a wheel at the car standing on the earth. Lift a back part of the car, put it on supports and remove back wheels.

If brake shoes are applied again, at removal they are necessary for marking. It is not allowed to interchange the position of a block of the right and left wheel. It can lead to non-uniform braking. It is necessary to apply only the BMW firm or block blocks resolved by BMW firm. Surely replace all blocks of disk brakes of forward wheels at the same time even if limit of wear reached one of blocks.


2 Rasstykuytes at the right support a cable of the sensor of wear (the shooter on an illustration), thus do not pull for a cable.

3 Remove plastic caps-1-and turn out the screws located under them with an internal shestigrannik. 2-screws of fastening directing brakes.

4 Remove a screw-driver a bracket-3-.

5 Remove a support back.

6 Remove an external brake shoe.

7 Internal brake shoe is fixed in the piston by a spring-6-.


 INSTALLATION

After removal of brake shoes do not press a brake pedal. Otherwise the piston can be squeezed out from the case.

8 If at the sensor of wear isolation of a contact plate is wiped, isolation of a cable is damaged or the plastic element is worn-out, it is necessary to replace the sensor.

9 Clear a brush from light metal or wipe a rag moistened in alcohol, directing surface and a seat for brake shoes. Do not apply for this purpose some the solvents containing mineral oils, or the tool with sharp edges. If blocks are applied again, they are necessary for clearing also.

10 Before installation of brake shoes it is necessary to check fingers of a hand existence задиров on a brake disk. At existence задиров it is necessary to replace disks.
11 Measure thickness of brake disks, address to the Section Measurement of thickness of a brake disk.

12 Check a dustproof cap-2-on existence of cracks. In the presence of damages it is necessary to replace a cap immediately as the got pollution quickly lead to loss of tightness of a support. For this purpose it is necessary to remove a support and to disassemble (work HUNDRED).

13 Press the piston by means of the corresponding adaptation. It can be made whetstone of firm wood (the hammer handle). Thus pay special attention to that the piston did not warp also a piston surface, and also a dustproof cap were not damaged.

At cave-in of pistons from brake cylinders in the tank of brake liquid level rises. Watch level, if necessary suck away liquid.

It is necessary to apply a special or plastic bottle which is intended only for this purpose to an otsasyvaniye of brake liquid! Do not apply for this purpose bottles to drinking water! Brake liquid is poisonous and it cannot be sucked away by no means a mouth through a hose. Apply for this purpose the special device. After replacement of brake shoes liquid level in the tank should not be higher than a mark the MOVE as when heating liquid extends. Following brake liquid flows down on the main brake cylinder, damages a paint and varnish covering and leads to corrosion.

At big wear of brake shoes it is necessary to check ease of a piston stroke. For this purpose insert wooden whetstone into a support and ask the assistant to press a brake pedal slowly. The brake piston should enter and leave easily. For carrying out check all other supports should be inserted on the places. Watch that the piston completely did not leave. If the piston stroke heavy, a support is subject to repair (work HUNDRED).

Adjacent surfaces of a support cover with paste against squeal of brakes.

For an exception of squeal of disk brakes in use “Never Seez Compound” is necessary to cover some places of a support with a thin layer of special paste, for example.

Paste should not get on dustproof cuffs at all, surfaces of a friction of brake shoes or a brake disk. If necessary paste at once wipe alcohol, a dustproof cuff replace with the new. The Podkladny plate of a brake shoe with paste do not cover.

14 Grease with a thin layer of paste against squeal an adjacent surface of the brake piston to a brake shoe.

15 Clear adjacent surfaces of-1-and-2-T-shaped brake shoes at a support and cover with a thin layer of paste against squeal of brakes.

16 Clear an adjacent surface-3-supports and cover with a thin layer of paste against squeal of brakes in the places shaded on an illustration.

17 Clear a bracket at directing T-shaped ((((((((shooters on an illustration) and apply a thin film pastes against squeal of brakes in the places shaded on an illustration.

18 Insert a brake head with a spring into the piston.

19 Insert into a support an external block-9-and put a support on the directing. Watch that blocks were cleared.

20 Check visually two bolts of fastening of a support, if necessary clear a bracket of pollution. If it is necessary, pass a carving in a bracket a tap. The bolts having a rust or damages of a carving, replace. Fix bolts-7-face key - 8-on 7 mm the moment of 30 N • m.

Bolts only clear, to grease them it is not necessary.

21 Put into place protective caps of bolts of fastening.
22 Join the socket of the sensor of wear on the right side of the car. The wire should pass in a loop of a cover of the union for air removal.

23 Establish a lock spring of a support.

24 Establish back wheels and screw fastening bolts. Bolts do not grease. Wheels establish so that the markings put at removal coincided. Lower the car on wheels and tighten bolts the moment of 100 N • m.

Several times strongly press a brake pedal in a standing position so that resistance was felt. Thus, brake shoes will occupy the working situation.

25 Check liquid level in the tank. If necessary add to MAX mark.

— Whether brake hoses are fixed?
— Whether the brake hose in the holder is fixed?
— Whether unions for air removal are tightened?
— Whether enough of brake liquid is filled in?
— On the working engine check tightness. For this purpose press a brake pedal effort of 200-300 N (20-30 kg) during 10 pages. The pedal should not weaken. Check all accessions on tightness.

26 Carefully let's be earned extra to new brake shoes. For this purpose several times brake the car since speed 80 to 40 km/h slightly pressing a pedal. Between braking let's be cooled to a brake.

After installation of their new brake shoes it is necessary to earn extra. During movement the first 200 km it is necessary to avoid strong unnecessary braking.

Brake disks in some regions should be utilized as special swore. Local authorities inform drivers on places of possible utilization.