装载机发生柴油机功率下降的现象经常发生，主要原因可能是柴油机制造质量没有达到设计标准，导致装载机柴油机功率减弱。那么导致山东装载机柴油机功率下降的原因主要有哪些呢？
1、装载机中连杆轴颈回转半径或活塞销至顶部尺寸不合适，装载机柴油机功率变弱，导致运行时活塞撞击缸盖，冲击力直接作用于连杆小头，使其工作不正常面断裂。
Loader turning radius rod journal or piston pin to the top of the wrong size, loader diesel power becomes weak, leading to run the piston head impact, the impact force acting on the connecting rod head directly to the fracture surface is not working properly .
2、铸造时的缺欠降低了缸体的刚度，发动机经过大的热负荷后产生产生永久变形。
Casting defect reduces the rigidity of the cylinder, the engine load after a large heat generating permanent deformation.

3、柴油机加工精确度差。由于整体变形量较大，造成连杆大头在轴颈上靠一侧并且无端隙、曲柄连杆机构的中心与缸套中心不重合等，导致活塞偏磨，运行后与缸壁的间隙增大而使气缸压缩力不足；连杆则因受力不良，小头的一侧受力较大，产生疲劳而断裂破损。
Diesel machining accuracy is poor. Due to the large amount of overall deformation caused by the connecting rod journal on one side and unprovoked gap center and cylinder crank linkage centers do not coincide, leading to the piston side wear, running increases with the cylinder wall clearance leaving the cylinder compression force is insufficient; link is due to poor power, larger force head on one side, resulting in fatigue and fracture damage.
4、柴油机缸壁间隙过小、活塞裙部椭圆度太小，导致运行时活塞膨胀，与缸套的摩擦力增大甚至咬死，致使连杆小头受力超出设计应力而断裂。连杆大头在轴颈上无端隙、曲轴轴向推力轴承轴向、间隙太小、连杆大小头轴瓦中心线不平行等，造成活塞偏磨，连杆小头受弯曲力的作用而断裂?；钊胩椎募湎恫徽罚奕蠡?。
Diesel engine cylinder wall clearance is too small, too small piston skirt ellipse, resulting runtime piston expansion, and increased friction liner or even killed, resulting in a small head rod force beyond the design stress fracture. Connecting rod journal unwarranted gap in the crankshaft axial thrust bearing axial clearance is too small, the size of the connecting rod bearing head is not parallel to the centerline, resulting in partial wear piston, connecting rod head bent by the force and effect of the fracture. Clearance between the piston and the sleeve is not correct, no lubrication.