COOK AVA - Manual (Page 8)

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g. Tighten in place.
h. Install belts on pulleys and align as described in the Belt and
Pulley Installation section.
Bearing Replacement
The fan bearings are pillow block ball bearings.
a. Loosen and remove belts by lowering motor mounting plate
with the four adjusting nuts.
b. Remove the bearing cover. Do not remove fan sheave yet.
c. Remove prop by loosening setscrews and retaining bolts and
sliding off shaft.
d. Record the location of the fan sheave from end of shaft, and
remove the sheave.
e. Record the distance from the bearing to the end of the shaft.
f. Loosen setscrews on bearings and remove shaft.
g. Remove bearings and replace with new bearings.
h. Slide shaft through bearings until shaft protrudes the same
amount as original shaft. Tighten setscrews.
i. Replace fan sheave in original location.
j. Replace prop but do not tighten yet.
k. Slide prop on shaft and center prop.
l. Replace and tighten belts.
m. Test run the fan.
n. Re-tighten setscrews on bearings, sheave, and prop. Recheck
belt tension and adjust as needed.
o. Replace bearing cover.
Prop Adjustment
The AVA prop pitch is adjustable. Consult factory for procedure.
6
5
4
3
2 1
Airflow
VAD Parts List
Item
No.
Description
1 Drum Weldment
2 Propeller Fixed Pitch
3 Prop Bushing
4 Motor
5 Wiring Box
6 Motor Mounting Bolts