Van phân phối dầu chân thắng xe nâng TCM FD100~150-2, FHD100~230Z When the driver depresses the foot pedal, pull the balance bar by pressing the lever so that the balance arm is moved down, the exhaust valve is closed and the intake valve is opened. At this time, the compressed air of the storage cylinder passes through the intake valve Filling the brake chamber, pushing the air chamber diaphragm to rotate the brake cam to achieve wheel braking.