Using the Trailer Lock System is easy. First, install it in front of the loading dock using the pre - drilled holes for wall or ground mounting. When a semi - trailer arrives, the electric or hand - pump hydraulic system will capture the ICC bar on the back of the trailer. During the loading and unloading process, the lock will follow the trailer's movement up and down thanks to the accumulator. Pay attention to the beeper and flashing light. If they go off, it means the lock isn't engaged properly. Always check the traffic light outside and the control panel inside to know the restraint's status. For maintenance, regularly check the hydraulic system for leaks and keep the light package clean. If there are any issues, consult the professional service team.