The electric motor housing 132 to have ZZ bearings, but have no grease fitting and has the electric motor housing having grease fitting 160 to the pin 200 is optional. When the electric motor housing has between 225 to 355 is normal that the electric motor has the grease fitting pin.
The purpose of performing the maintenance of the electric motor is extended as much as possible, the life of the bearing system. The electric motor maintenance process includes the observation of the general state of the electric motor and where are the bearings; lubrication and cleaning the electric motor also serve to evaluate the overall condition of the electric motor and also serves to make a thorough examination of the bearings.
The temperature control in electric motor bearing part of routine maintenance. Ideally, it is a lubricated bearing with appropriate grease, but you must follow what is described in the electric motor manual.