对于液压制动系统装有真空增压器的车辆,真空增压器工作性能的好坏直接影响着行车的安全和驾驶员的工作强度。为此,驾驶员应经常就车对真空增压器的性能进行检查。在检查前,应首先调整好制动鼓与制动蹄之间的间隙和制动踏板的自由行程,放净制动系统内的空气,加足制动液,然后作如下检查。 a.起动发动机,当真空压力达到正常后,一次将制动踏板踩到 For the hydraulic brake system equipped with a vacuum booster vehicle, the performance of the vacuum booster has a direct impact on driving safety and driver’s work intensity. To this end, the driver should always check the performance of the vacuum booster. Before checking, adjust the clearance between the brake drum and the brake shoe and the free stroke of the brake pedal to release the air in the brake system, add the brake fluid and check as follows. a. Start the engine, once the vacuum pressure to normal, the brake pedal to step