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Impeller Maintenance
(DC Link / Fan Section)
7000 "A" Frame
Impeller Removal from Motor Shaft
The fan impeller is held onto the motor shaft with a split tapered bushing.
This bushing is positioned on the motor shaft and through the center of the
impeller. Two cap screws, when tightened to 10.2 N-m (7.5 ft-lbs.), lock
the bushing onto the motor shaft and the impeller to the bushing.
Safety notes
The impeller is fragile. Do not allow the impeller to support the weight of
the motor.
If vertical, the impeller and bushing may fall when loosening cap screws.
Physical injury or component damage may result.
E
D
B
A – Taper surfaces
B – Capscrews
C – Split in Taper Bushing
D – Key
E – Threaded Hole for Separating Tapers
Figure 4.23 – Cutaway View of Fan Impeller and Bushing
Component Definition and Maintenance
C
A
4-31
DO NOT LUBRICATE
CAPSCREWS, BORE,
OR BUSHING BARREL
7000A-UM151E-EN-P - October 2018
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