Through calculation and analysis, the reason for the bending of the piston rod of the loader is: the two ends of the boom cylinder are connected with the frame and the boom with the tilting phenomenon, and the support width is too small, indicating that the assembly adjustment clearance is improper or the side wear is serious, and the support width should be increased; The accumulation of sediment at the discharge at the lower end of the boom cylinder and the wear on the outside of the lower end of the boom cylinder indicate that the accumulation of deposited material is serious and the rotational friction is large.

The improvements to the bending of the piston rod of the loader are:

(1) Increase the support width, the general support width is 1.2~1.5 times of the diameter of the piston rod.

(2) In the assembly process, make full use of the adjustment pad to ensure the clearance and alignment of the two ends of the boom cylinder with the frame and the boom, and enhance the anti-wear performance of the adjustment pad material.

(3) improve the discharging structure; Increase the opening distance and inclination angle of the discharge plate to reduce the accumulation of blanking, which is conducive to the smooth and natural discharge of blanking; Increase the distance between the lower end of the boom cylinder and the connection of the main engine to facilitate the discharge of large-size stones.

(4) The instruction manual stipulates the requirements for the regular cleaning of accumulated materials. After the improvement, the loader piston rod was no longer bent.