15:12. Back drum brakes



  1. Remove a wheel.
  1. Turn off a nut of fastening of the bearing of a back wheel and remove a nave with the brake drum.
  1. Remove the lower returnable spring, a clip and a spring of support of a brake shoe.
  1. Remove brake shoes together with the regulator.



  1. Measure the internal diameter of the brake drum. The indicator of hour type check a beating of the brake drum. Replace the brake drum if the internal diameter of a drum exceeds maximum permissible value.

Nominal diameter: 203,2 mm
Maximum diameter: 205,2 mm
Beating of the brake drum: 0,05 mm
  1. Measure thickness of overlays of back brake shoes. Replace all brake shoes on one axis of the car even if only one block has thickness, smaller maximum permissible.

Thickness of overlays of brake shoes: 4,5 mm
Minimum admissible thickness of overlays of brake shoes: 1,0 mm

  1. Check uniformity of a prileganiye of a brake shoe to the brake drum.
  2. Examine working brake cylinders on lack of leak of brake fluid.
  1. Examine a brake board on lack of wear or damages.



  1. Grease with lubricant the following points of contact of brake shoes:
    – points of contact of brake shoes with a brake board;
    – points of contact of brake shoes with the support plate.

The recommended lubricant: SAE J310, NLGI No. 2.

  1. Establish a rack of support of a brake shoe.
  1. Establish returnable springs on brake shoes.
  1. After installation of the brake drum several times tighten the lever of the parking brake.