7-2-6-proverka-klapana-vakuumnogo-usilitelya-tormozov.html
7.2.6. Check of the valve of the vacuum amplifier of brakesRemove a vacuum hose.
Blow a hose in a direction to the vacuum amplifier of brakes. Blow a hose in a direction to the engine.
If air passes through the valve in both directions, replace the valve. If air passes through the valve only in a direction to the engine, the valve is perfectly in order.
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