The brake valve drive is mechanical, designed to transfer force from the driver's foot through the system of rods and levers to the brake valve lever.
Pedal 4 is installed in front of the driver on the right side on a bracket mounted on the cab floor.
The lower arm of the pedal passes through a hole in the floor and is connected by a rod 3 with an adjusting fork 2 to the front lever 1.
Fork 2 is threaded and designed to adjust the position of pedal 4.
To ensure the return of the pedal to its original position, its lower arm is connected by a return spring to the bracket 12 of the front lever 1, which is attached to the cab floor from below.
The front lever is mounted on the axis of the bracket 12; the long arm of the lever is connected to the adjusting fork of the rod 3, the short arm is connected to the rod 10 of the drive of the intermediate lever 7 of the pendulum type.
The intermediate lever 7 is mounted on the bracket 6, fixed on the upper shelf of the left side member, and is designed to ensure the transfer of force from the rod 10 coming from the outside of the side member to the link 8 of the drive lever of the brake valve 9 going from the inside of the side member.
Brake valve 9 is fixed on a bracket to the left side member of the frame from the inside.