In addition to periodic inspection "Small Cooling Fan" Enclosures and whether the intake chamber interior severe wear, remove heavy dust accumulation addition, these parts may not be other special maintenance. Regularly check that all fastening bolts are tightened, to have pressed the fan bolt portion of the bottom of the feet to the butterfly spring-loaded mounting height specified in the drawings. Always check the "Small Cooling Fan" bearing lubricant oil, if oil spills box appears, you can put a little cap bolts tightened, this is not enough, it may have to replace it with new packing up. When the bearing lubricant normal use, should be replaced at least once in six months, when for the first time, after about 200 hours of operation performed, the second oil change time in 1 to 2 months later should be checked weekly "Small Cooling Fan "oil once, such as lubricating oil does not deteriorate, the oil-change work can be extended to two to four months time, you must use the prescribed grade oil when replacing the old oil tank and put a clean and thoroughly cleaned before Fill with fresh oil.