Check the submersible pump bearings: Check the motor part of the upper and lower bearings, if found to wear or clearance is too large, must be promptly replaced with new bearings, non-sick "improper use. Check the method as follows: If the motor is running, the submersible pump produce "carbolic" sound, and the cycle is proportional to the speed, and feel hard by rotating the rotor, the bearing raceway is a bit astringent or avulsion phenomenon; Intermittent "哽 哽" sound, turning the rotor by hand when there is an indefinite dead, usually submersible pump ball cage damage, the inner ring broken or broken ball. In the event of the above situation, the bearing must be replaced to avoid any further damage. Submersible pump in the demolition before the end cover should be marked with the seat at the seat mark. In order to repair the assembly as it is, it will not cause assembly errors caused by the shaft is not the heart; in the removal of the submersible pump impeller and bushings and other components, it should be noted that must not hard hit hard impulse, available thermal expansion principle, heating edge Tap or use "Rama" and other tools to remove. Winding burn should be analyzed for reasons (overload, card pump, lack of phase, leakage leakage short circuit, etc.), remove the submersible pump motor winding, do not make the silicon steel tilt shift and burr and other phenomena, so as not to knock the new windings knock " Bell "caused by ground or short circuit fault. Rewound the new coil, the enameled wire and insulating paper must be selected regular manufacturers, due to the submersible pump motor heat level is generally E, B level. Must pay attention to its level of heat corresponding. Low insulation thickness should be sufficient, and to pad inserted in place. Winding off the assembly line, be careful not to scratch the stator core coil, but also avoid using crossed repeatedly crossed.
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