6.1.12. Removal, check and installation of back drum brakes

Fig. 6.42. Back drum brakes



Removal
Remove a back wheel.

Fig. 6.43. Nave of a back wheel


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


Remove brake shoes and the regulator assembled (fig. 6.44).

Check

Fig. 6.45. Measurement of thickness of brake shoes


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


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


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


Apply special lubricant on the places specified in the drawing (fig. 6.48).

Fig. 6.49. Scheme of installation of a spring of fixing


Establish a finger and a spring of fixing of a brake shoe (fig. 6.49).

Fig. 6.50. Installation of the top returnable spring


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.