Warning! Remember that the dust generated during operation of the brake mechanisms may contain asbestos, which is extremely harmful to human health. Never blow off dust with compressed air or inhale it - wear a protective mask or respirator when servicing the mechanisms. Never use gasoline or petroleum-based solvents to wipe brake system components - use only branded cleaning agents or methyl alcohol!
Note: Service the brake assemblies one at a time - the second one can be used as a reference if necessary.
1. Remove the brake drum (see Section Removal, installation and inspection of the brake drum).
2. Measure the remaining thickness of the brake shoe friction linings.
3. If the wear of the linings is below the maximum permissible value (1.0 mm), replace the shoes together with the drums.
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Note: To avoid the vehicle losing directional stability during braking, replacement of brake components must be performed for both assemblies of the same axle as a set.
4. If you notice a noticeable difference in the residual thickness of the pads on the left and right sides of the vehicle, check the proper functioning of the wheel cylinders and assess the condition of the working surfaces of their pistons.