目前,大部分农用运输车都采用液压式制动器,该制动器使用一段时间后,踏板自由行程逐渐增大,需踩2～3脚才能起到制动作用,以致影响行车安全。此故障一般可通过调整活塞推杆的长度来解决。实际上,引起该故障的原因是多方面的,必须有针对性地采取措施方能排除。 1.在工作过程中,制动蹄逐渐磨损,造成制动蹄与制动鼓之间的间隙增大。制动时,制动蹄必须移动较大的距离才能与制动鼓产生制动作用,制动分泵中须压入更多的液压油,则总泵活塞必须移动更大的距离,即自由行程增大。调整方法:用千斤顶顶悬车轮,用扳手拧转支承销和凸轮,或用螺丝刀拨动调整螺钉(自动增力式),使车轮不能转动,再慢慢地往回拧,使其能灵活转动并无刮碰声为止。 2.当向贮液室中补充液压油 At present, most agricultural vehicles use hydraulic brakes. After the brakes are used for a period of time, the free stroke of the pedals gradually increases. It takes 2 to 3 feet to act as a brake to affect traffic safety. This failure can generally be solved by adjusting the length of the piston rod. In fact, the cause of the failure is multifaceted, and measures must be taken to eliminate it. 1. During work, the brake shoes gradually wear, resulting in increased clearance between the brake shoes and the brake drum. Brakes, the brake shoes must move a large distance to brake with the brake drum, the brake cylinder to be pressed into more hydraulic oil, the master cylinder piston must move a greater distance, that is, free Increased travel. Adjustment method: Use jack top suspension wheel, use a wrench to tighten the support pin and cam, or use a screwdriver to adjust the screw (automatic power type), so that the wheel can not rotate, and then slowly turn back to make it flexible rotation No scratching noise so far. 2. When filling the reservoir with hydraulic fluid