How to maintain rising bollard？

Hydraulic automatic bollard|integrated hydraulic extension pile   Hydraulic automatic bollard|The integrated hydraulic extension pile project is simple to construct and maintain. Because it is a hydraulic transmission integrated mode, it is environmentally friendly, energy-saving, low-consumption, lower failure rate, longer service life and lower maintenance cost. And there is no underground hydraulic pipeline laying. It only needs to be carried out for the problematic pile during maintenance. It can easily take out the whole internal components and facilitate maintenance and overhaul.