Daewoo Nexia

Since 1994 of release

Repair and car operation

17.28. The drum-type brake mechanism

THE GENERAL DATA

The drum-type brake mechanism

1. THE APERTURE STOPPER IN THE BASIC DISK 2. THE BOLT OF FASTENING OF THE WHEEL CYLINDER 3. THE FINGER OF THE HOLDER 4. THE BASIC BRAKE DISK 5. THE WHEEL CYLINDER IN GATHERING 6. BRAKE КОЛОДКА THE BACK 7. THE SPRING OF THE HOLDER 8. THE WASHER OF THE HOLDER

9. THE BRAKE DRUM 10. THE LOCK SCREW 11. THE COUPLING SPRING TOP 12. THE COUPLING SPRING BOTTOM 13 EARRING 14. THE REGULATOR IN GATHERING 15. THE REGULATOR SPRING 16. PRESS THE REGULATOR LEVER 17. BRAKE КОЛОДКА THE LOBBY

Regulator

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

On the car back brake mechanisms of drum-type type with active and passive колодками are established. In отторможен ном a condition the top ends колодок 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 колодки to an internal surface of a friction of a drum. The lobby active колодка in addition nestles on a drum the friction moment, than self-strengthening or серводействие колодки is provided. At braking of the car, moving a backing, back колодка the lobby – passive is active, and. The forces operating on колодки from outside of pistons and a brake drum, are perceived by an emphasis on неподвиж ном a brake disk. The basic brake disk is fixed on the corresponding lever of a back suspension bracket. Adjustment of backlashes in the brake mechanism occurs automatically at each office braking. For brake mechanisms with active and passive колодками more intensive deterioration of a lobby active колодки in comparison with the back passive is characteristic. It is not recommended to rearrange were in the use brake колодки as it can break automatic adjustment of the brake mechanism and increase a free wheeling of a brake pedal.

At servicing of drum-type brake mechanisms it is necessary to replace all details entering into the repair complete set.

To grease details according to applied instructions.

It is forbidden to use for it blows 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 демонтажем or a detachment of any pipelines or hoses of a brake hydrodrive, it is necessary to remove air from a corresponding contour or from all brake system.

To replace brake колодки follows only the complete set on both brake mechanisms.

The moments of an inhaling of carving connections are given for the dry, not greased fixing details.

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

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The prevention

The material of brake overlays contains the asbestos fibres which hit in respiratory organs of the person is hazardous to health. Therefore at carrying out of servicing and repair of brake mechanisms it is necessary to exclude such operations, as clearing of details of products of deterioration of overlays by means of a dry brush or a stream of compressed air, polishing колодок etc., connected with пылеобразованием. For removal small пылевидных particles from brake mechanisms it is necessary to use the damp fabric moistened with water.

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To remove or disconnect

PERFORMANCE ORDER

1. To lift the car. 2. Back wheels. To mark position of back wheels concerning naves. 3. Nuts of a heat-shielding casing to put a casing on the muffler. 4. To release fastening of a cable of a lay brake. 5. To turn out the lock screw of a brake drum. 6. A brake drum. At the complicated dismantle of a drum:      – To be convinced that the lay brake is switched off;      – To release fastening of a cable of a lay brake;      – To take out a stopper 1 of an aperture in a basic disk 4 and to move a screw-driver разжимной the lever of a lay brake against the stop in back brake колодку 6. 7. The top and bottom coupling springs 11, 12. 8. A spring of a regulator 15 and press the lever of a regulator 16. 9. A regulator in gathering 14. 10. A finger 3, a spring 7 and a washer 8 holders. 11. Back brake колодку 6.

To clear

PERFORMANCE ORDER

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

To check up

PERFORMANCE ORDER

1. Smoothness of rotation of a carving core in a nut. 2. In the presence of traces of an overheat, deterioration or other defects on details to replace faulty details. The 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 with колодками (fig. of the Place of drawing of greasing on a basic brake disk see). 2. The razzhimnoj lever 18 lay brakes to a tip приводного a cable. 3. Back brake колодку 6 on a basic disk 4, a finger, a spring and a washer of the holder. To check up correct position of a cable of a lay brake. 4. A regulator 14, forward колодку 17 and the bottom coupling spring 12. To tighten nuts of fastening of a heat-shielding casing. The prevention Not to stretch the too strongly bottom coupling spring 12. The spring 12 should settle down under an emphasis of a brake disk. 5. A finger, a spring and a washer of the holder. 6. A 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 lever 16 regulators an axis and to put on a spring 15. The prevention Not to stretch too strongly spring 15 regulators. 8. To insert one end of an earring 13 into an aperture of an axis of the lever 16, and another – in an aperture of a lobby brake колодки. 9. The top coupling spring, having fixed its ends to an earring 13 and back колодке 6. The prevention Not to stretch the too strongly top coupling spring 12. 10. A brake drum 9 and the lock screw 10. 11. Back wheels. 12. To adjust a lay brake.