48" and 52" HyfloTM Fans Installation and Operators Instruction Manual
Maintenance
MV1747D
7
IMPORTANT!
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
or Motor.
• Periodically check the V-Belt and replace if necessary. A worn Belt will cause a substantial drop in Fan
performance or it can break and cause Fan failure.
If a Belt rides below the Sheave edge, replace the belt.
(See Figure 15 below)
• Check Belt Tension.The Belt
should be tensioned just tight
enough to minimize Belt slippage.
Over tensioning the belt will
cause premature Belt and Bearing
wear. With a new Belt the Idler
Sheave indicator mark should line
up with the third notch in the Ten-
sioner Housing
(See Figure 16)
.
• Keep Shutters, Blades, and Housing clear of obstacles for best air performance.
• The motor and Fan Shaft Bearings are pre-lubricated. Grease zerks are provided on the fan shaft bearings
for installations where re-lubrication is needed. Add only a small amount of grease to purge impurities
out of the bearing seals. Use only high quality lithium soap base grease and clean all dirt from zerk before
applying grease. Chore-Time recommends using Shell Alvania # 2 in the fan shaft bearings.
Check Sheaves for wear. Replace if a Sheave groove is worn.
(See Figure 17)
Maintenance
Bad Belt
Good Belt
1747-054 04/03
Bad Belt (Needs Replaced)
Figure 15. Belt Condition
Third Notch
Idler Sheave Indicator Mark
Figure 16. Idler Sheave Indicator Mark
Bad Sheave
1747-053 04/03
Bad Sheave (Needs Replaced)
Good Sheave
Figure 17. Sheave Condition