裝載機工作裝置油缸的作用力有主動力和被動力之分，主動力就是保證裝載機正常作業情況下，油缸推動工作機構運動的作用力，其最大值決定于工作裝置參數及掘起力，被動力就是當油缸閉鎖情況下，裝載機鏟掘時作用于油缸上的力，它的最大值取決于液壓系統的限壓閥的壓力及活塞的作用面積。
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.

當裝載機轉斗油缸閉鎖，靠提升動臂進行掘起或舉升時，動臂油缸產生主動力，其大小應能克服最大掘起力時所產生的總力矩；此時的轉斗油缸大端產生支承力，其油壓應小于液壓系統中限壓閥的壓力；當山東裝載機動臂油缸閉鎖進行轉斗時，轉斗油缸主動；當鏟斗下翻進行強制入土時，轉斗油缸小腔產生主動力，動臂油缸小腔為支承力。
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.