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T180、T200、T220和TY220等型号推土机在使用过程中,常出现转向困难、不能转向和冷车时能转向而当底盘温度升高后又不能转向等故障现象。此时,可根据使用时间和故障的发生过程进行液压系统的检查和修理。 一、故障检查和排除 1.左右两侧突然同时出现上述故障现象 可拆检方向操纵阀总成进油口处的溢流阀。故障原因是:油液过脏,油中杂质磨伤或拉伤溢流阀芯和阀体的内腔表面,使阀芯卡死在开启接通回油口的位置上,对油压不起调节作用,系统压力达不到标准值。若溢流阀解体后,经检查零件损伤不严重,可用180粒度或240粒度的
The bulldozers T180, T200, T220 and TY220 often have difficulty in steering, can not turn, and can turn when cold, and can not turn when the chassis temperature rises. At this time, the hydraulic system can be checked and repaired according to the time of use and the occurrence of a fault. First, the failure to check and eliminate 1. The above-mentioned failure phenomenon occurs suddenly on the left and right sides. Reversible inspection direction The relief valve at the inlet of the valve assembly. The cause of the malfunction is that the oil is dirty and impurities in the oil are scratched or strained on the inner surface of the overflow valve core and the valve body, so that the valve plug is stuck at the position where the oil return port is opened, and the oil pressure cannot be maintained. Regulatory effect, system pressure can not reach the standard value. If the overflow valve is disassembled, the damage of the inspected part is not serious, 180 or 240 grains can be used.