When the case of the cylinder is open, do not press a brake pedal, otherwise the piston will jump out. Do not damage a boot of the piston and do not allow hit of oil on a brake disk. When replacing blocks always replace also laying. If on laying there are traces of a rust or flaking of a rubber covering, replace them new. To turn off a connecting bolt there is no need, except for dismantling and replacement of a support assembled. In these cases suspend the cylinder case on a wire so that not to stretch a brake hose. You see off to extra earnings of frictional surfaces of brakes in case of boring or replacement of drums or disks, after replacement of brake shoes or frictional slips, and also if after the small run the pedal begins "to fail".