Before changing brake shoes of back wheels, it is necessary to measure thickness of slips on brake shoes. At brake shoes service life approximately on 50 000 km of run of the car during which periodically check thickness of slips on brake shoes. There is a rule that under adverse conditions of driving of 1 mm of an overlay of a brake shoe the minimum for 1000 km grinds off. Usually slips serve much more long.

For a rough estimate of thickness of overlays of brake shoes which should be seen off regularly, illuminate a portable lamp in an observation port of a support and visually estimate thickness of overlays of brake shoes.

For exact determination of thickness of overlays of brake shoes it is necessary to remove a back wheel (поддомкратив a back part of the car and having turned out bolts fixing a wheel) and to measure thickness of an external and internal brake shoe.

If the thickness of a slip together with a brake shoe makes 7 mm, the limit of wear of a slip and a block is reached it is necessary to replace. The thickness of a block without a slip makes 5 mm and wear of a slip till thickness of 2 mm is limiting.

Prevention Brake shoes always replace in pairs (in a set of 4 pieces) even if the slip of only one block and at the same time on both brake mechanisms of back wheels wore out. To rearrange in places brake shoes it is forbidden.