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In the maintenance process, the diagnosis of pump failure is a key part of the following are given several common failures and elimination measures for you to set the pump fault diagnosis. Troubleshooting and Troubleshooting of Pumps 1 No supply of fluid, insufficient or inadequate supply of fluid 1) Pumps not filled with water or not properly drained Measures to be taken: Check pump housing and inlet lines are all filled with liquid. 2) too low speed Elimination measures: Check the motor wiring is correct, the voltage is normal or the turbine steam pressure is normal. 3) the system head too high Elimination measures: Check the system head (especially friction loss). 4) Suction too high Elimination measures: Check the existing net head (inlet pipe is too small or too long will cause great friction loss).