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１ 过载阀的用途与作用轮式装载机工作液压系统广泛采用多路换向阀，其转斗缸的两工作油口一般需加装两个过载补油阀，用于对转斗缸及系统起过载保护作用。液压缸无杆腔过载阀的调定压力值一般大于或等于系统最大工作压力，而有杆腔过载阀的调定压力大都为无杆腔过载阀压力的
1 Overload valve uses and role Wheel loader hydraulic system Widely used multi-way valve, the cylinder cylinder two working ports generally need to install two overload valve for the cylinder bucket and the system Overload protection. Hydraulic cylinder rodless chamber overload valve setting pressure value is generally greater than or equal to the maximum working pressure of the system, and rod chamber overload valve setting pressure mostly for rodless chamber overload valve pressure