Daewoo Nexia

since 1994 of release

Repair and car operation


Deu Neksiya
+ Maintenance instruction
+ Maintenance
+ Engine
+ 3. Engine (two top camshafts)
+ cooling System
+ Toplevnaya and exhaust systems
+ Electric chain
+ 7. Ignition system
+ 8. Electronic control unit and sensors
+ Transmission
+ 10. Five-speed transmission and main RPO MM5 broadcast
+ 11. Automatic Transmission
+ Steering
+ Running gear
+ 14. Forward suspension bracket
+ 15. Drive of forward wheels
+ 16. Back suspension bracket
- Brake system
   17.2. General description
   17.3. Check of a technical condition of brake system
   17.4. Filling of a tank of the main brake cylinder
   17.5. Air removal from brake system
   17.6. Washing of brake system
   17.7. Check of a regulator of brake forces
   17.8. Brake hoses (forward)
   17.9. Brake hoses (back)
   + 17.10. Parking brake
   17.11. Check of a condition of forward brake slips
   17.12. Check of a condition of back brake slips
   17.13. Brake disks
   17.14. Brake drums
   17.15. Brake pedal
   17.16. Main brake cylinder
   17.17. Tank
   17.18. Regulators of brake forces (proportional valves)
   17.19. Main brake cylinder assembled
   17.20. Repair of the main brake cylinder
   17.21. Disk brake mechanism
   17.22. Blocks and slips
   17.23. Protective cover of the piston
   17.24. Brake disk
   17.25. Support
   17.26. Guard
   17.27. Support repair
   17.28. Drum-type brake mechanism
   17.29. Adjustment of the brake mechanism
   17.30. Adjustment of the parking brake
   17.31. Basic brake disk
   17.32. Wheel cylinder
   17.33. Repair of the wheel cylinder
   17.34. Vacuum amplifier of brakes
   + 17.35. Anti-blocking system of brakes
   17.36. Air removal from a brake hydraulic drive
   17.37. Air removal from a brake hydraulic drive manually
   17.38. The valve for air removal from the block of modulators
   17.39. Electromagnetic valves of modulators
   17.40. The block of hydraulic modulators with electric motors
   17.41. Electronic control unit braking
   17.42. Sensor of angular speed of a forward wheel
   17.43. Flexible conducting of DUS of a forward wheel
   17.44. Sensor of angular speed of a back wheel
   + 17.45. Flexible conducting of DUS of a back wheel
   17.46. System electric safety lock
   17.47. ABS relay
   17.48. Signaling devices
+ Body
+ Heating, ventilation
+ Electric equipment


8128da4b



17.28. Drum-type brake mechanism
GENERAL INFORMATION

Drum-type brake mechanism

1. THE OPENING STOPPER IN THE BASIC DISK
2. BOLT OF FASTENING OF THE WHEEL CYLINDER
3. FINGER OF THE HOLDER
4. BASIC BRAKE DISK
5. WHEEL CYLINDER ASSEMBLED
6. BRAKE SHOE BACK
7. SPRING OF THE HOLDER
8. WASHER OF THE HOLDER 		9. BRAKE DRUM
10. LOCK SCREW
11. COUPLING SPRING TOP
12. COUPLING SPRING BOTTOM
13 EARRING
14. REGULATOR ASSEMBLED
15. REGULATOR SPRING
16. PRESS REGULATOR LEVER
17. BRAKE SHOE FORWARD

Regulator

101. CARVING CORE
102. NUT
103. CLIP
104. HOLLOW CORE

On the car back brake mechanisms of drum-type type with active and passive blocks are established. In отторможен in number a condition the top ends of blocks are pressed by springs to pistons, and the bottom ends – to an emphasis located on a basic brake disk. By pressing a brake pedal pistons press blocks to an internal surface of a friction of a drum. The forward active block in addition nestles on a drum the friction moment, than self-strengthening or servodeystvy blocks is provided. When braking the car, moving a backing, the back block is active, and a lobby – passive. The forces operating on blocks from pistons and a brake drum, are perceived by an emphasis on неподвиж in number a brake disk. The basic brake disk is fixed on the corresponding lever of a back suspension bracket. Adjustment of gaps in the brake mechanism occurs automatically at each office braking. For brake mechanisms with active and passive blocks more intensive wear of a forward active block in comparison with the back passive is characteristic. It is not recommended to rearrange the brake shoes which were in the use as it can break automatic adjustment of the brake mechanism and increase a free wheeling of a brake pedal.

When servicing drum-type brake mechanisms it is necessary to replace all details entering into a repair kit.

To grease details according to enclosed instructions.

It is forbidden to use for обдува and drying of details the compressed air from an industrial network as drops of oil containing in it can put out of action rubber consolidations.

After the work, connected with demontazhy or a detachment of any pipelines or hoses of a brake hydraulic actuator, it is necessary to remove air from the corresponding contour or from all brake system.

To replace brake shoes follows only a complete set on both brake mechanisms.

The moments of an inhaling of carving connections are given for dry, ungreased fixing details.

All repair work should be carried out on a pure workbench for an exception of pollution of details of brake system mineral oils, greasings and liquids.

Prevention

The material of brake slips contains the asbestos fibers, which hit in respiratory organs of the person hazardously to health. Therefore at carrying out servicing and repair of brake mechanisms it is necessary to exclude such operations, as cleaning of details of products of wear of slips by means of a dry brush or a stream of the compressed air, polishing of blocks etc., connected with a pyleobrazovaniye. For removal of small pylevidny particles from brake mechanisms it is necessary to use the damp fabric moistened with water.

To remove or disconnect

PERFORMANCE ORDER
1. To lift the car.
2. Back wheels. To mark the provision of back wheels concerning naves.
3. Nuts of a heat-shielding casing to put a casing on the exhaust silencer.
4. To release fastening of a cable of the parking brake.
5. To turn out the lock screw of a brake drum.
6. Brake drum.
At the complicated dismantle of a drum:
     – to be convinced that the parking brake is switched off;
     – to release fastening of a cable of the parking brake;
     – to take out a stopper 1 of an opening in a basic disk 4 and to move a screw-driver razzhimny the lever of the parking brake against the stop to a back brake shoe 6.
7. Top and bottom coupling springs 11, 12.
8. Spring of a regulator 15 and press lever of a regulator 16.
9. Regulator assembled 14.
10. Finger 3, spring 7 and washer of the 8th holder.
11. Back brake shoe 6.

To clear

PERFORMANCE ORDER
1. Regulator details.
2. To put on a carving the greasing intended for details of brake mechanisms.

To check
PERFORMANCE ORDER
1. Smoothness of rotation of a carving core in a nut.
2. In the presence of traces of an overheat, wear or other defects on details to replace faulty details.
Prevention

Before installation of a brake drum it is necessary to be convinced that a nut 102 навернута on a core 101 up to the end. Thus the nut should not be jammed on a core carving.


To establish or attach

Places of drawing of greasing on a basic brake disk

PERFORMANCE ORDER
1. To put greasing on ledges of a brake basic disk 4 in places of contact to blocks (see fig. Places of drawing of greasing on a basic brake disk).
2. Razzhimna the lever 18 of the parking brake to a tip of a driving cable.
3. A back brake shoe 6 on a basic disk 4, a finger, a spring and a washer of the holder. To check the correct provision of a cable of the parking brake.
4. Regulator 14, forward block 17 and bottom coupling spring 12. To tighten nuts of fastening of a heat-shielding casing.
Prevention

Not to stretch too strongly the bottom coupling spring 12. The spring 12 should settle down under an emphasis of a brake disk.

5. Finger, spring and washer of the holder.
6. Regulator 14.
6а. Completely to screw a regulator core in a nut.
6б. To establish a regulator.
6в. To turn a clip 103 to a basic brake disk 4.
7. Press the regulator lever 16 an axis and to put on a spring 15.
Prevention

Not to stretch too strongly a spring of the 15th regulator.

8. To insert one end of an earring 13 into an opening of an axis of the lever 16, and another – in an opening of a forward brake shoe.
9. The top coupling spring, having fixed its ends to an earring 13 and a back block 6.
Prevention

Not to stretch too strongly the top coupling spring 12.

10. Brake reel 9 and lock screw 10.
11. Back wheels.
12. To adjust the parking brake.