The prevention of loader bucket cylinder piston rod automatically extended      

The loader arm is lifted to a certain height, the bucket in turn down limit position, the rotating bucket cylinder piston rod extending the length of the shortest, the boom and bucket bottom limit contact site, if you continue to enhance the boom, the relative position of support point and the rocker arm rotating bucket cylinder ends with the boom to continue ascension changes (i.e. mechanical interference), forcing the rotating bucket cylinder piston rod. Due to the boom in the process of ascension, the bucket cylinder before and after the cavity is closed, the piston rod pull will cause the front cavity pressure surge, open the one-way valve to the hydraulic oil cavity, cavity flow into the cavity after once, before the chamber pressure drops immediately, the piston rod extends automatically.

At this time, if the piston of the one-way valve stuck (not open), when the boom rises, turning the front chamber of the cylinder due to the movement of interference will produce the trapped oil, huge pressure piston rod; the locking nut connected with the pin joint bearing but also by force if the interference is serious, but also influence; the rotary bucket cylinder piston rod automatically extended.

The full bucket improper operation during forward collision to obstacle strong reaction in the bucket loader, the counter force by putting pressure on the bucket rod; in addition, due to the leverage principle of the arm, the piston rod rotating bucket cylinder by extending out of tension, if when the piston of the one-way valve can not open (or not after discharge of oil will cause the rotating bucket cavity), front chamber of the cylinder cavity of the trapped oil, before a sharp increase in pressure, bending, rotating bucket rod bucket cylinder pin joint bearing damage and turn the lock nut "bucket cylinder piston teeth" fault.

The method of prevention is that the operator must take the bucket first and then drop the boom after unloading the bucket at the high place. So, when the rigid connection can reduce the impact force generated anti collision interference or obstacles.