The hydraulic platform can't rise. Why?
The hydraulic platform and the control line are relatively simple, the hydraulic pump running at the point of rise will drive the oil hydraulic drive plunger up. Turn on the solenoid valve when the point is lowered. Be described in the hydraulic pump caused by dirt Chen Ji which reduces the pump fluid efficiency, hydraulic pump will be removed to clean the pump tablet, does not rule out the filtrate may be network jam.
You can see here. Understand how the hydraulic platform works. A lot of things will be clear
There's a problem with the control system, maybe that part of the circuit is in bad contact
