The self-priming pump cannot suction water
Reason: there is air in the pump body or the gas in the water inlet pipe, or the bottom valve is not closed tightly and not filled with water, the vacuum pump packing is seriously leaking, and the gate valve or flap door is not closed tightly.
Measures: First press the water up, then fill the pump body with water, and then turn it on. At the same time, check whether the check valve is tight and whether there is air leakage in the pipeline and joints. If there is air leakage, grease lubricating oil or mixed paint to the joints after disassembly, and tighten the screws. Check the oil seal ring of the water pump shaft and replace it with a new one if it is severely worn. Water or air leakage in the pipeline. The nut may not be tightened tightly during installation. If the leakage is not serious, apply cement or cement slurry mixed with asphalt oil on the air or water leak. Temporary repairs can be coated with wet mud or soft soap. If there is water leakage at the joint, you can use a wrench to tighten the nut. If the water leakage is serious, you must re-disassemble and replace the cracked pipe; reduce the head and press the nozzle of the pump into underwater 0.5m.