Hydraulic brake master cylinder
1 - cork; 2 - cylinder body; 3 – the piston of a drive of back brakes; 4 - washer; 5 – the piston of a drive of forward brakes; 6 - sealing ring; 7 - locking screws; 8 - piston return springs; 9 - spring plate; 10 - clamping spring of the sealing ring; 11 - spacer ring; 12 - inlet; A - compensation hole (gaps between O-ring 6, spacer ring 11 and piston 5)
Piston 3 and 5 are located in the master brake cylinder, which actuate different circuits. Both pistons take their initial position under the action of springs 8, which press the pistons against the screws 7.
The tightness of the pistons in the cylinder is ensured by four sealing rings 6. The housing is closed from the front with a plug 1.