装载机工作装置油缸的作用力有主动力和被动力之分，主动力就是保证装载机正常作业情况下，油缸推动工作机构运动的作用力，其最大值决定于工作装置参数及掘起力，被动力就是当油缸闭锁情况下，装载机铲掘时作用于油缸上的力，它的最大值取决于液压系统的限压阀的压力及活塞的作用面积。
Shandong loader work force cylinder unit with active power and the power of the points, the active force is to ensure that under normal operating circumstances loaders, tanks pushing force working body movement, and its maximum value

depends on the working device parameters and breakout force role of the area when the pressure limit is the power cylinder lock case, when the force acting on the shovel loader on a cylinder, its value depends on the hydraulic system

pressure valve and the piston.

当装载机转斗油缸闭锁，靠提升动臂进行掘起或举升时，动臂油缸产生主动力，其大小应能克服最大掘起力时所产生的总力矩；此时的转斗油缸大端产生支承力，其油压应小于液压系统中限压阀的压力；当山东装载机动臂油缸闭锁进行转斗时，转斗油缸主动；当铲斗下翻进行强制入土时，转斗油缸小腔产生主动力，动臂油缸小腔为支承力。
When Shandong loader bucket cylinder lock, conducted by upgrading rise or lift boom, boom cylinder produces the active force, the total moment of its size should be able to overcome the maximum breakout force generated; this time bucket cylinder produce big end bearing force, the oil pressure should be less than the pressure in the hydraulic system pressure limiting valve; when Shandong loader boom cylinder lock carried the bucket, bucket cylinder initiative; when

forced to turn buried under the bucket, bucket cylinder small cavities produce the active force, the small chamber of the boom cylinder supporting force.