1.一辆东风牌农用车只能拖带启动,却不能正常启动柴油机,且高速行驶时无力将密封塞拆下检查,发现密封塞密封环带分布有5mm长的明显麻点,这些麻点已造成喷油泵高压油区与低压油区连通。在液压头密封塞上有一圈宽度为2mm的高精度圆形密封环带,该环带里侧是高压油区,外侧是低压油区。当密封塞旋紧后,环带便起到极好的密封作用,从而将高压区与低压区隔开,防止高、低压区的柴油相互 1. Dongfeng brand agricultural vehicles can only be towed start, but can not start the diesel engine, and high speed driving inability to remove the sealing plug inspection and found sealing ring sealing ring with a clear distribution of 5mm long pits, these pitting has been Resulting in high pressure oil injection pump area and low pressure oil area connectivity. In the hydraulic head sealing plug has a width of 2mm high precision circular sealing ring, the ring is the high pressure oil area inside, the outside is a low pressure oil zone. When the sealing plug is tightened, the annulus will play an excellent sealing effect, thus separating the high pressure zone from the low pressure zone and preventing the high and low pressure diesel oil from each other