Some of the most common fan issues deal with the interior of the motor housings on up blast fans. These areas are designed to be sealed off from the grease exhaust flow with only outside fresh air allowed into the area. There are many reasons for this as the electrical, bearing, motor, vibration isolators and fan belts are in these protected area and excluding them from the grease contaminated air not not only is a safety issue, but also greatly increase the longevity if the components . You can see in these pictures that someone cut holes in the fan to try to "cool down" the fan motor. No only does this fail to accomplish this, it actually ads heat To the motor plus contaminates the entire area with greasy acidic air. It also allows the outside rain into this area. What they need to do in install tubes at a downward slant that allows fresh outside air, but keeps out the rain and grease. This is the normal way most manufacturers set up their upbeat fans. Another area to watch is the gaskets on some motor covers. These need to be replaced on a regular basis. We also recommend using a vacuum to remove the duct from the motor air vents whe servicing the belts allowing them to cool easier. We use a small portable vacuum for this. One tng to mention, We do not recommend using direct drive fans for any grease exhaust system for many more reasons that I will get into right now. I will go into that in another article.
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