1. The solenoid valve is not working; when operating the solenoid valve on the control panel, it cannot be opened either manually or automatically. You can replace the battery valve coil. If the battery valve cannot be opened manually, please check the inside of the cylinder, sealing ring, piston bolt, and screws. Check for air leaks.
2. The working efficiency slows down; the wear of the concrete mixer pump during use causes the working efficiency to slow down, which may be caused by the internal leakage of the hydraulic system caused by the internal wear of the whole machine. The hydraulic pump of the towing pump is a plunger variable pump. After working for a certain period of time, the internal hydraulic components of the pump (cylinder, plunger, nine-hole plate, etc.) will inevitably become too slow. At this time, it is necessary to overhaul the entire machine and repair and replace parts that have exceeded the wear limit. The drag pump technology effectively controls fuel consumption and engine wear, and the variable pump control system has higher precision and improved efficiency!