How to deal with the problem of filling machine failure

Whether the throttle valve and filling interval of the speed throttle valve are closed or not, the throttle valve cannot be closed.
For internal foreign matters, speed up the loading of the three-way valve and fill the hose with head air. If there is air, it will be reduced or eliminated as much as possible.
Check all sealing rings for damage. Replace it with a new one in case of damage.
Check whether the valve core at the filling port is jammed or delayed opening. If it is jammed, the valve core should be installed in a good position. If the opening is delayed, adjust the throttle valve of the thin cylinder.