Electric motor may suffer from: low insulation resistance or bearing heating / motor overheating
The electric motor can present many problems and these problems appear in the most diverse parts of the electric motor in a common way, because it is a machine that is operating in an interrupted way.
When the electric motor exhibits low insulation resistance changes, it means that the electric motor may be with damaged groove insulation; The cabins may be cut; The bobbin head may be contacting the casing; There may be presence of moisture or chemical agents or even presence of dust on the winding.
Overheating of the electric motor or heating of the bearings may occur due to: excessive axial or radial stress of the belt; Bent shaft; Loose or decentralized covers; Lack or excess grease; Foreign matter in the grease; Obstructed ventilation or have a smaller fan; The voltage or frequency may be out of specification; The rotor is crawling or failing; The stator is without impregnation; The overload; The bearing defective; Consecutive games; Air gap below specified; The capacitor remains unsuitable or improperly connected. https://www.mrosupply.com/hydraulics-and-pneumatics/hose-reels/2516639_ez-sh-550_coxreels/