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一辆DD349型自卸车(使用CA1091汽车底盘)的空气压缩机一直泵气,据前任驾驶员介绍,是限压阀的毛病,应该抉新的了。拆开限压阀检查,没发现其本身有问题,却看到限压膜片下面垫了五个纸垫圈。在没装限压阀进气管的情况下起动发动机,在气压很低时(标准排气压万应为784～833kh)进气管就向外排气了,看来是气压调节器工作不正常,于是将其拆下检查。拧下气压调节器下面的螺塞,发现回位弹簧座处垫了一块内胎皮,将螺塞上的大气通孔堵死了。取下内胎皮进一步检查,用手指抵住阀门,使其与芯杆接触且与阀座贴合(即处于泵气状态),从气压调节器与贮气筒连接的气口吹气,与大气相通,而从另一个与限压阀相连接的气口吹
A DD349 dump truck (using CA1091 car chassis) air compressor has been pumping gas, according to the previous driver introduction, is the pressure limiting valve problems, should be new. Open the pressure limiting valve inspection, did not find itself a problem, but saw the pressure limit pad under the pad of five paper washers. In the case of no limit valve into the intake manifold starting the engine, the pressure is very low (standard exhaust pressure should be 784 ~ 833kh) intake pipe on the exhaust, it seems that the pressure regulator is not working properly, So remove the check. Unscrew the screw plug under the air regulator and found a cushion of inner skin at the return spring seat to block the air vent hole in the screw plug. Remove the inner tire skin for further inspection, with the fingers against the valve, make contact with the core rod and seat with the valve seat (that is, in the pump state), from the regulator connected to the air reservoir air port blowing, and the atmosphere, While blowing from another port connected to the pressure limiting valve