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装载机动臂缸和转斗缸的沉降量超出规定的范围,说明该机液压系统有故障。正常情况下,将铲斗装入额定载荷,柴油机和液压油在正常工作温度(50℃)下,将动臂举升到最高位置,然后熄灭柴油机,分配阀置于封闭状态,这时测量动臂缸活塞杆移动距离,沉降速度应小于65 mm/15 min;将铲斗置于收斗位置,并处于运载高度,其他条件与前述相同,测量转斗缸活塞移动距离,沉降速度小于20mm/15 min。
The amount of settlement of loader boom cylinder and bucket cylinder exceeds the specified range, which indicates that the hydraulic system of the aircraft is faulty. Under normal circumstances, the bucket into the rated load, diesel and hydraulic oil at normal operating temperature (50 ℃), the boom will be lifted to the highest position, and then turn off the diesel engine, the distribution valve placed in a closed state, then measure the movement Arm cylinder piston rod moving distance, settlement speed should be less than 65 mm / 15 min; the bucket placed in the collection position, and at the carrying height, the other conditions are the same as before, measure the cylinder moving cylinder piston displacement, settlement speed less than 20mm / 15 min.