Lincoln Electric Fixed Fan D350

- Expected lifetime of the bearings is 20 000 hrs. Replace them at this period

- Check that large quantities of dust are not deposited on the motor ventilation blades and that the air inlet openings are not blocked, as that could lead to motor overheating. Clean if necessary

- The fan rotor must be clean and regularly cleaned in order to avoid a drop in efficiency or wheel unbalance, which would damage the motor bearings

- Check the fastening of the bolts that hold the motor on its seat, the screws that fasten the impeller on the motor shaft (shaft end), and the nuts or screws holding the scroll on the seat

- Inspect the motor connections and the tightening of lugs (with the power off)

- Check the fastening of the stuffing boxes

- Check the motor condition according to the instructions of the motor manufacturer. For transmission fans, follow the bearing lubrication frequencies, check the alignment of bearings and belt tension

- Regularly check the vibrations from the fan and motor. If they are not normal, please contact the manufacturer.