The purpose of this document is to explain how to safely and properly install a blower impeller.
Tools Needed:
- Torque wrench (set to 20 Ft-lbs)
- 3/8” drive socket extensions
- 3/8” drive ½” impact socket
- 3/8” drive 9/16” impact socket
- 3/8” drive 7/16” impact socket
- Electric impact
- Rubber mallet
- Safety gloves
- Safety glasses
Procedure:
- Verify Impeller Rotation
- Ensure the selected impeller is the correct rotation for the respective blower (housings with nozzle on the right-hand side will need a clockwise impeller. Housings with nozzle on the left-hand side will need a counterclockwise impeller).
- Prepare The Motor Shaft
- Ensure the keyway is installed on the motor shaft.
- Inspect the shaft and keyway for wear or debris. Address any damage before proceeding.
- Set the shaft orientation so the keyway is at the 12 o’clock position. This will make installing the impeller much easier.
- Prepare The Taper Lock Hub
- Loosen all bolts on the taper lock hub. Do NOT remove the bolts all the way.
- Pull the taper lock free so that you can move it back and forth in the impeller.
- DO NOT USE ANTI SIEZE WHEN INSTALLING THE TAPER LOCK INTO THE TAPER LOCK HUB.
- Install The Impeller
- Align the key on the motor shaft with the keyway in the taper lock.
- Carefully slide the impeller assembly onto the shaft.
- Push the impeller on until the shaft is recessed no more than 1/2" into the hub as seen in the picture below
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- Adjust impeller position for proper depth and alignment within housing.
- Tighten The Taper Lock Bolts
- Tighten the taper lock bolts by hand in a clockwise pattern to evenly seat the hub.
- Make multiple light passes, gradually increasing bolt tension.
- Use a torque wrench to final torque all bolts to 20 ft-lbs.
- Verify that the impeller is fully seated and spins freely without contact (example of fully seated impeller below).
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- Final Checks
- Double-check torque on all taper lock bolts.
- Manually rotate the impeller to ensure no interference.
- Record impeller installation details on the work order or inspection log.
Instructional Video: