Patent ID: 8490265

Claim:
A method for manufacturing a brake, in which an annular boot which can be expanded and contracted according to movements of a piston is assembled to an opening part of a cylinder and to an annular groove on an outer peripheral face of the piston, the method comprising: engaging one end of the boot with the opening part of the cylinder in a state where the piston is contained in the cylinder; moving the piston so that at least a part of the piston is withdrawn front the cylinder and that the other end of the boot is pressed by a pressing face of the piston; fitting the other end of the boot into the annular groove of the piston, while a movable range of the other end of the boot is restricted by an expanding allowance of the boot whose one end is engaged with the opening part of the cylinder; pressurizing an inside of the cylinder until the piston is moved to be separated from an oil seal provided on the cylinder; monitoring a change of a pressure of the pressurized inside of the cylinder; judging presence or absence of a trouble of the boot based on the change of the pressure in the cylinder; and reversing a moving direction of the piston so that the other end of the boot is fitted into the annular groove of the piston.