Hand Trailer hydraulic pressure does not rise, what's going on?
See if the hydraulic oil is too thin, if there is any impurity, whether the pressure relief screw is damaged or not.
Check the seal is tight, remove the seal washer is good to see
First check for lack of oil Check the cause of the lack of oil. See if the hydraulic oil is too thin, if there is any impurity, whether the pressure relief screw is tight or not!
