Often use synchronous belt wheel knows, synchronous belt wheel is not easy to occur in the application of the failure and damage, but it will be because of the influence of some factors, lead to motor overheating of the equipment. With respect to its specific cause of motor overheating phenomenon, mainly include the following: the reason one: motor shall not apply. If because the motor is not applicable, a medium weight greater than configuration motor phenomenon, is the inevitable result at the time of transmission, lead to motor overheating. Reason 2: packing gland is too strong. If synchronous belt wheel of the gland is too strong, will affect the normal operation of the motor and heat dissipation effect, which in turn lead to motor overheating phenomenon. Reason 3: mechanical seal spring too tight. Of mechanical seal spring adjustment if there will be too loose or too tight, will increase the burden of the operation of the synchronous belt wheel, in this case, can also lead to motor overheating. Reason 4: pump assembly quality is not good. If application of synchronous belt wheel equipment, there is a pump assembly quality is bad, especially there is friction or the motor and pump shaft is not concentric, are very prone to motor had a such problems. Reason 5: wheel and shaft coupling effect is not good. If the synchronous belt wheel and shaft coupling, there exists a certain transmission clearance, will affect the normal operation of belt wheel, lead to motor overheating.