Qmark WEB -Heavy-Duty Belt Drive Exhaust Fans - Manual (Page 7)

For most applications, a lithium base grease conforming to a NLGI grade 2 consistency
should be used. This type of grease inhibits rust, is water resistant, and has a temperature
range of -30°F to 200°F with intermittent highs of 250°F.
When greasing bearings it is important not to overgrease. This is especially true if the
bearings are equipped with extended grease lines and the bearings are not visible. In this case
more bearing failures occur due to overgreasing than undergreasing.
The motor bearings and fan bearings on belt drive fans should be greased at regular
intervals. Motor manufacturers greasing instructions and recommendations should be followed
closely. Avoid the use of a pressure greasing system, which tends to fill the bearing chamber
completely.
NOTE: On motors with non-regreasable, sealed-bearings, no lubrication is required for the
life of the bearing.
RECOMMENDED GREASE:
Temperature -30°F to 200°F: Chevron SRI #2, Shell Alvania EP #2, Standard Oil Factran EP #2
Temperature 200°F to 375°F: Shell-Aeroshell NOS 16 & 22, Endura Polymer #802, Dow
Corning DC44 (not compatible with non-silicon based grease).
AIR FLOW
E. Make sure there are no obstructions to airflow in outlet or inlet ductwork.
HARDWARE
F. Check tightness of all bolts and set screws.