1、裝載機舉升缸活塞密封件早期磨損，將動臂舉到最高位置，拆開其中一支舉升缸活塞桿腔的進油接頭，將工作分配閥的動臂操縱桿置于“舉升”位置，并踩中高速油門，觀察舉升缸接口處的泄漏情況，正常略微有泄漏，判斷另一只舉升缸同理。
Shandong Loader lifting cylinder piston seals early wear and tear, the boom lift to the highest position, which open into the oil fitting a lifting cylinder rod chamber of the boom lever assignment valves placed in the "lift "position,and stepped on the accelerator speed, observe the lifting cylinder leakage at the interface, normal little leak, judge the other lifting cylinder empathy.

2、裝載機工作泵效率降低，在排除第一項原因后，可基本判定工作泵效率降低。
Shandong loader working pump efficiency is reduced, the exclusion of the first cause, can substantially reduce the operating pump efficiency is determined.

3、裝載機動臂舉升速度主要決定于工作泵的轉速、效率和舉升油路的泄漏量，舉升缸活塞密封件損壞或工作泵的效率下降，泄漏量會隨之增大，且隨工作壓力的升高而增大，即物料越重舉升越慢。
Shandong loader boom lift speed depends mainly on the work of the pump speed, efficiency and lift the oil leakage, the lifting cylinder piston seal is broken or decrease the efficiency of the work of the pump, the leakage will be increased, and with the work increased pressure increases, the material, the slower the heavier lifting.