... /4001, smooth operation and long life; the fans of the moment of inertia is small, high precision dynamic balance, smooth ... 400400220508080460060125030512-14480×480×3101, debug, detailed inspection before operation of various fan parts, rotating impeller should be no slack and ... , adjust the drive belt tension, lubrication (grease).6, in case of winter snow, freezing date, must always be switched on to ...