the white smoke from the sewage pump:
The sewage pump is running at high temperature.
a. Check if the pipeline is blocked.
b. Check if the float ball of the anti-surge valve is stuck.
c. Check if the depth of the sewage suction pipe is too deep.
d. Check if the oil inlet pipe of the sewage pump is blocked.
Solution: Clean the oil inlet and outlet pipes of the sewage pump, and place the sewage suction pipe at an appropriate position. Disassemble the sewage pump and clean the interior with diesel or gasoline.
the sewage pump not sucking or discharging:
1. The vacuum pump does not rotate.
a. Check if the gear of the power take-off is working properly.
b. The transmission shaft does not rotate: The rotor shaft inside the pump is broken.
2. The vacuum pump rotates.
a. The vacuum cannot be increased when air is discharged from the exhaust pipe.
(1. Check if the rear tank is tightly closed.
(2. Check if all ball valves are in the closed position.
(3. Check if the gasket of the flange is damaged.)
b. No air is discharged from the exhaust pipe. (Check if the four-way valve is working properly, if the internal positioning switch is intact, and if there are any foreign objects inside.)
3. Only water can be drained but not sewage.
a. Check if the tank is full.
b. Check if there is water accumulation in the one-way valve and the air-water separator.
