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IOM RBU/RBUMO/RDU
Rev. 2 December 2000
Belt Drive Fans Parts List Direct Drive Fans Parts List
1. Fan Panel
2. Propeller
3. Drive Frame Channel (2)
4. Motor Plate
5. Motor
6. Motor Pulley
7. Shaft Pulley
8. Fan Shaft
9. Bearings (2)
10. Belt
11. Bearing Plate (Level 3 fans only - not shown)
1. Fan Panel
2. Propeller
3. Drive Frame Channel (2)
4. Motor Plate
5. Motor
1
1
2
2
3
5
5
8
6
7
10
9
4
3
4
FASTENERS AND SET SCREWS
Any fan vibration has a tendency to loosen mechanical fasteners. A periodic inspection should include checking all
fasteners and set screws for tightness. Particular attention should be paid to set screws attaching the propeller to the
shaft and the shaft to the bearings. Loose bearing set screws will lead to premature failure of the fan shaft.
LUBRICATION
Refer to the paragraph on bearings for bearing lubrication. Many fractional horsepower motors installed on the smaller fans are
lubricated for life and require no further attention. Motors equipped with oil holes should be oiled in accordance with the
manufacturer’s instructions printed on the motor. Use a high grade SAE 20 machine oil and use caution not to over lubricate.
Motors supplied with grease fittings should be greased according to directions printed on the motor.
REMOVAL OF DUST AND DIRT
Dirt clogs cooling openings on the motor housing, contaminates bearing lubricant and collects on propeller blades
causing severe imbalance if left unchecked. The exterior surface of the motor, fan panel and entire propeller should be
thoroughly cleaned periodically. Use caution and do not allow water or solvents to enter the motor or bearings. Under no
circumstances should motors or bearings be sprayed with steam or water.
DAMPER INSPECTION AND SERVICE
CAUTION: Butterfly dampers on units supplied with optional spring lifter bars are under spring tension and will open
forcefully if the fusible link is released. Butterfly dampers should be inspected for proper operation at each service interval.
Check for freedom of movement and general condition of the damper blades and hinge rods.
Copyright © 2000 Greenheck Fan Corp.