| 1. For check of working capacity of valves of adjustment of pressure on models the Versatile person and a Van, established on the car bottom, ask the assistant to press sharply a pedal of a brake and observe of the valve. |
| 2. In the course of check the car should stand on wheels. |
| 3. Draught of the valve should move by pressing and at release brake pedals. Otherwise the valve of adjustment of pressure is not serviceable. |
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