The body of the brake pressure regulator has a control hole closed with a plug. Leakage of brake fluid from the hole indicates a leak in the cuffs of the brake pressure regulator and the need to replace it.
The device of the brake pressure regulator in the rear brake mechanisms: 1 - earring for fastening the elastic lever to the rear axle; 2 - retainer of the elastic lever in the earring; 3 - elastic lever; 4 - regulator mounting bracket; 5 - protrusion of the plate adjusting bracket; 6 - bolt (front) fixing the regulator and adjusting plate; 7 - plate adjusting bracket; 8 - plate; 9 - lever; 10 - regulator; 11 - control hole closed with a plug; 12 - arrow on the body of the regulator indicating the direction of fluid flow in the connected tube