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48" and 52" Vanguard Plus Belt Drive Fans Installation and Operators Instruction Manual
Maintenance
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.
sioner, or the 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.
1747-054 04/03
• Check Belt Tension.The Belt should be ten-
sioned just tight enough to minimize Belt slip-
page. 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 Tensioner
Housing.
• 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 recom-
mends using Shell Alvania # 2 in the fan shaft
bearings.
•Check Sheaves for wear. Replace if a Sheave groove is worn.
Good Sheave
MV1758C
Good Belt
Do Not spray water on Fan Shaft Bearings, Belt Ten-
Bad Belt (Needs Replaced)
Bad Belt
Third Notch
Bad Sheave (Needs Replaced)
1747-053 04/03
Bad Sheave
Maintenance
Belt Tensioner
Idler Pulley Indicator Mark
5
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