Removal and installation of the brake drum. AZLK 2141 (Muscovite)
Service and car repairs of 2141 - the Muscovite.
1. General data
2. Engines
3. Power supply system
4. Cooling system
5. Transmission
6. Running gear
7. Tires, wheels
8. Steering
9. Brake management
9.1. Specifications and characteristics
9.2. General assessment of technological level of a condition of brake management
9.3. Main cylinder of a brake
9.4. Removal and dismantling of the main cylinder of a brake
9.5. Assembly of the main cylinder of a brake
9.6. Vacuum amplifier
9.7. Brake mechanisms of forward wheels
9.8. Brake mechanisms of back wheels
9.8.1. Removal and installation of the brake drum
9.8.2. Removal and installation of blocks of a back brake
9.8.3. Dismantling and assembly of wheel cylinders of back brakes
9.9. Adjustment of the mechanism of the manual drive of the parking brake system
9.10. Pressure regulator
9.11. Signaling device
9.12. Removal of air from a hydraulic actuator of brakes (pumping of brakes)
9.13. Reduction of the signaling device in the working condition
9.14. Possible malfunctions of brake management
10. Body
11. Electric equipment
12. Electrical circuitries
 










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9.8.1. Removal and installation of the brake drum

Moving of a front brake shoe on a back brake by means of a core at considerable wear of a drum with education of a fillet at it

1 – bolts of fastening of a wheel;

2 – lever (assembly shovel);

3 – core with a diameter of 8 mm

Moving of a back brake shoe on a back brake by means of a tubular mandrel at considerable wear of a drum with education of a fillet at it

1 – bolts of fastening of a wheel;

2 – lever (assembly shovel);

3 – a tubular mandrel with an internal diameter of 12 mm

PERFORMANCE ORDER
1. The brake drum needs to be cleared of dirt and to be convinced of its free rotation.
2. The handle of the mechanism of the manual drive of the parking brake system has to be at the same time in the lowered family way.
3. To turn out two clamps 2 (see rice. Brake mechanisms of back wheels), fixing a drum to a nave of a back wheel, and, using as strippers two bolts with a carving of M8 1,5-2 cm long, to screw them in openings And yes to remove the brake drum.

Prevention

At strong corrosion of a flange of a drum and a nave it is connection it is necessary to moisten with kerosene or brake fluid and to sustain some time. In order to avoid damage of a drum and deformation of a board of a brake it is strictly forbidden to beat with the hammer a rim of a drum or to enter the screw-driver between a board and a rim of a drum, using it as the lever.


4. At considerable wear of a drum on its working surface the ring ledge interfering removal of a drum is formed. In this case removal of a drum needs to be made in the following order.
5. Through a big opening in a drum flange to insert a core with a diameter of 8 mm into an opening of "sock" of a forward block.
6. Any neck (for example, an assembly shovel), leaning on bolts of fastening of a wheel, to turn the brake drum towards the wheel cylinder (see rice. Moving of a front brake shoe on a back brake by means of a core at considerable wear of a drum with formation of a fillet at it) so that the block moved, having shifted at the same time a ring of automatic adjustment of a gap in the working cylinder.
7. To shift a back brake shoe towards the working cylinder, having put on the tubular end of a mandrel 3 (see rice. Moving of a back brake shoe on a back brake by means of a tubular mandrel at considerable wear of a drum with education of a fillet at it) on axis 22 (see rice. Brake mechanisms of back wheels) razzhimny lever.
8. To remove a rubber cap 1 on a board 6 (see rice. Details of the drive of the parking brake system) of a brake. Through the released opening, leaning on its edge the screw-driver, it is necessary to rotate a gear adjusting nut 23 (see rice. Brake mechanisms of back wheels) an expansion level counterclockwise if to look in the direction of forward wheels. The nut should be turned on several turns.
9. To remove the brake drum.
10. To examine the internal working surface ("mirror") of the removed reel and to check its ovality.
11. The difference of measurements of diameters (maximum and minimum) should not be more than 0,2 mm.
12. In the presence of deep risok or the increased ovality to chisel a drum, being based on the central opening and pressing a vutrenny surface of a flange of a drum to adaptation.
13. For the purpose of preservation of necessary rigidity of drums it is impossible to chisel them more than on 0,8 mm on the party. After boring the surface of "mirror" of a drum has to have a roughness no more than 1,6 microns.
14. Before installation of the brake drum its privalochny surfaces, basic openings and privalochny surfaces of a flange of a nave of a wheel should be cleared carefully of dirt, corrosion or забоин, and also to grease slightly with refractory and moisture resistant lubricant.
15. The brake drum has to be put on densely against the stop a nave flange only by effort of hands. Thus after installation the drum should not have free movement on a nave.


9.8. Brake mechanisms of back wheels

9.8.2. Removal and installation of blocks of a back brake