14.2 Standard Motor Specifications14 -4114.2.10 Replacing the Motor Cooling FanThe AC main axis motor is cooled using a cooling fan mounted to the back of the motor. If the cooling fanmalfunctions due to dirt or damage, replace the cooling fan immediately. For spare parts, refer to 14.2.9Spare Motor Parts.Never replace the cooling fan or insert or remove wiring while the power supply is turned ON. Also, whenreplacing the cooling fan or inserting or removing wiring, be sure not to drop screws or other small parts intothe motor unit.Replace the Motor Cooling Fan using the following procedure.1. Turn OFF the power supply. Make sure the main circuit capacitor has fully discharged by confirmingthat the CHARGE indicator is not lit before starting work.2. Remove the cooling fan lead cables inside the terminal box, and pull out the lead cables from the leadcable vent.3. Remove the four screws used to mount the casing to the motor unit, and the screws within the terminalbox used to fix the terminal box to the casing.4. Remove the cooling fan and the casing as a single unit.5. Perform steps 1. to 4. in reverse to mount the new cooling fan and the casing as a single unit to the motorunit.6. Apply Three Bond No. 1212 to the lead cable vent on the terminal box to seal the vent.Note: When performing step 4., if the casing and terminal box interfere with each other makingit difficult to remove the casing, loosen the terminal box mounting screws.Casing mountingscrews (x 4)Casing (Formssingle unit withcooling fan.)Motor unitTerminal boxCasing MountingTerminal box mounting screwCooling fan lead wiresCasing fixing screwLead wire ventTerminal Box ExteriorFig 14.15 Replacing the Motor Cooling Fan14IMPORTANT
