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农用运输车的液压制动系统中如有空气渗入,就会影响制动性能,必须予以排除.判断方法:当踩下制动踏板感觉软绵无力,有明显的弹性反应并且刹不住车时,说明液压制动系统中有空气渗入.排除顺序:先远后近,先下后上.即从离总泵最远的车轮开始,按右后轮、左后轮、右前轮、左前轮的顺序进行.但是对于装有真空增压器的液压制动系,应首先放真空增压器上离总泵最近的放气阀,然后逐一放较远的放气阀和各分泵上的放气阀.北京BJ212型汽车前轮两个分泵的放气,按“先下后上”的原则.
If there is air infiltration in the hydraulic braking system of agricultural vehicles, it will affect the braking performance and must be ruled out. Judgment: When the brake pedal is depressed, feeling soft and weak, with obvious elastic reaction and unable to stop , Indicating that there is air infiltration in the hydraulic brake system. Exclusion order: first, then first, last, then from the master cylinder from the beginning of the wheel, press the right rear wheel, rear left wheel, front right wheel, front left However, for a hydraulic brake system equipped with a vacuum booster, the bleeder valve on the vacuum booster closest to the master cylinder should be placed first, and then the bleeder valve and each branch pump farther away Of the deflation valve.Beijing BJ212-type car front wheel deflated two sub-pumps, press the “first on the next” principle.