How to prevent excavator from "pulling out the cylinder"

 What is the "unplugging" phenomenon? What's the harm? How to prevent it?

Genuine Kubota DST-i Diagnostic Adapter for Kubota Takeuchi Machine 

 (1) Cylinder pullout: When the bucket is in the downturn limit position, the extended part of the piston rod of the bucket cylinder is the shortest.

When the boom reaches a certain height, the limit surface of the boom contacts the limit surface of the bucket. If the boom continues to be raised, the bucket will 

The bucket cannot flip downwards as the boom is raised, but at this time the relative positions of the support points on both sides of the bucket cylinder are different. 

 02.2025 Kubota DiagMaster 25.02.01 Level 9 Applicable MERLO,Manitou,Carrier,Nonself,CNH,Bobcat

To change as the boom continues to lift, this forces the piston rod of the bucket cylinder to extend outward. Because the boom lift During the lifting process, the front and rear chambers of the bucket cylinder are in a closed state, and the extension of the piston rod will inevitably cause a rapid increase in the pressure in the front chamber.

The phenomenon of this kind of bucket lifting the boom when the bucket is fully unloaded causes the piston rod of the bucket to extend outward is called "pull-out".

   "tank" phenomenon. (2) Hazards: bending deformation of the bucket tie rod; damage to the spherical bearing of the bucket cylinder: bucket oil

 

The locking nut of the cylinder piston is loose. (3) Preventive measures: After unloading, retract the bucket first and then raise the boom.