6.1.12. Removal, check and installation of back drum brakes
Fig. 6.42. Back drum brakes
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Removal
Remove a back wheel.
Fig. 6.43. Nave of a back wheel
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Turn off a nut of fastening and remove a nave together with the brake drum (fig. 6.43).
Remove the lower returnable spring and springs of fixing of blocks.
Fig. 6.44. Brake shoes and regulator assembled
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Remove brake shoes and the regulator assembled (fig. 6.44).
Check
Fig. 6.45. Measurement of thickness of brake shoes
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Measure thickness of brake shoes (fig. 6.45).
Nominal thickness of a block: 5,14 mm.
Extreme thickness of a block: 1,5 mm.
Fig. 6.46. Measurement of internal diameter of the brake drum
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Measure the internal diameter of the brake drum (fig. 6.46).
Check a beating of the brake drum.
Fig. 6.47. Check of completeness of a prileganiye of brake shoes and drum
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Check completeness of contact of a block and the brake drum (fig. 6.47).
Internal diameter and limit beating of the brake drum
Installation
Fig. 6.48. Places of putting lubricant
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Apply special lubricant on the places specified in the drawing (fig. 6.48).
Fig. 6.49. Scheme of installation of a spring of fixing
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Establish a finger and a spring of fixing of a brake shoe (fig. 6.49).
Fig. 6.50. Installation of the top returnable spring
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Press draft and establish the top returnable spring (fig. 6.50).
After assembly several times press the lever of the drive of the parking brake.