Maintenance
12
MV1864P
•Disconnect Power Prior To Maintaining Or Cleaning The Fan. The fan may start automatically causing serious
injury or death.
• Service and repair of fans should be done only by a qualified technician.
• Keep the Fan clean for maximum life and best performance.
Do Not spray water on Fan Shaft Bearings, Belt
Tensioner, or the Motor.
• Periodically check the V-Belt and replace if necessary. A bad Belt will cause a substantial drop in Fan perfor-
mance or can break and cause Fan failure. If a Belt rides below the Sheave edge, replace the Belt.
(See Figure 13)
• Keep HYFLO
®
Doors, Blades, and Housing clear of obstacles for best air performance.
•Check Sheaves for wear. Replace if Sheave
groove is worn.
(See Figure 13 to the Right).
Fan Bearing and Belt Tensioner
Lubrication
•
Grease zerks are provided for lubrication on the fan shaft bearings and the belt tensioner.
•
Lubricate the fan every 2-6 months or whenever these components get wet.
•
Disconnect power to the fan before lubricating.
•
Clean the zerk before lubricating to prevent contamination from entering the bearing.
•
Use a high quality lithium based, NLGI #2, grease such as Shell Gadus S2 V100 2. Do not use incompatible greases
containing aluminum, barium, calcium, bentonite clay or polyurea thickeners.
•
Slowly rotate the fan shaft by hand while slowly applying the grease. Rapidly applying grease to a stationary bearing
can damage the bearing seals.
•
Apply about .10 oz (2.8 g, 3.1 cc) of grease at a time or until a slight amount of grease can be seen purging from the
seal.
Maintenance
Worn Sheave
(Needs Replaced)
Good Belt
Bad Belt
Good Sheave
Bad Sheave
MV1700-020 04/02
Bad Belt
(Needs Replaced)
Figure 13. Worn Sheave
Grease Zerk
Grease Zerk