Amarillo Chittom AirFlo PowerFlo Hub Installation

Installation Instructions

PowerFlo™ Fans

2.0 Hub Installation ...

Drive a screwdriver into the flange of the split taper bushing to enlarge the bore enough to slide onto the fan shaft.
Caution - Do not drive the screw driver into the tapered surface or damage to this critical mating surface may occur.

The fan hub may be installed either with the bushing away from the end of the shaft or with the bushing towards the end of the shaft. If the bushing goes towards the end of the shaft, slide the fan hub on the shaft prior to installing the split taper bushing.
When lifting the fan hub, bolts may be inserted into the blade clamp mounting holes to use as a handle.

DO NOT APPLY ANTI-SIEZE COMPOUND TO THE SHAFT OR TO THE BUSHING BOLTS.

Slide the split taper bushing and key onto the fan shaft until it is in the desired location on the shaft. Remove the screw driver from the flange allowing the bushing to clamp down on the shaft. Use an alien wrench to tighten the set screw over the key just enough that the bushing and key will not move during mounting of the fan hub.
Slide the tapered bore of the fan hub over the split taper bushing. Insert the bushing bolt through the split lock washer and drilled holes in the bushing flange. Finger start the bolts in the hub.

Torque 3/8" bolts to 35 ft. lbs.
Torque 1/2" bolts to 45 ft. lbs. Using a torque wrench, tighten the three split taper bushing bolts. The bolts should each be tightened a little at a time and move to the next bolt sequentially, working up to the specified torque for the bolt. After the bolt reaches the specified torque, keep going around the bolts in order checking the torque until no further tightening is required to remain at the specified torque value.
Do not over torque the bushing bolts or damage may occur.

Tighten the set screw over the key in the split taper bushing completely so the screw point locks into the key surface.

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AMARILLO CHITTOM AIRFLO
728 South Wheeling • Tulsa, OK 74104 USA
Phone: (918) 585-5638 • Fax: (918) 587-3577
E-mail: info@amarillochittom.com

	Drive a screwdriver into the flange of the split taper bushing to enlarge the bore enough to slide onto the fan shaft. Caution - Do not drive the screw driver into the tapered surface or damage to this critical mating surface may occur.
	The fan hub may be installed either with the bushing away from the end of the shaft or with the bushing towards the end of the shaft. If the bushing goes towards the end of the shaft, slide the fan hub on the shaft prior to installing the split taper bushing. When lifting the fan hub, bolts may be inserted into the blade clamp mounting holes to use as a handle. DO NOT APPLY ANTI-SIEZE COMPOUND TO THE SHAFT OR TO THE BUSHING BOLTS.
	Slide the split taper bushing and key onto the fan shaft until it is in the desired location on the shaft. Remove the screw driver from the flange allowing the bushing to clamp down on the shaft. Use an alien wrench to tighten the set screw over the key just enough that the bushing and key will not move during mounting of the fan hub. Slide the tapered bore of the fan hub over the split taper bushing. Insert the bushing bolt through the split lock washer and drilled holes in the bushing flange. Finger start the bolts in the hub.
Torque 3/8" bolts to 35 ft. lbs. Torque 1/2" bolts to 45 ft. lbs.	Using a torque wrench, tighten the three split taper bushing bolts. The bolts should each be tightened a little at a time and move to the next bolt sequentially, working up to the specified torque for the bolt. After the bolt reaches the specified torque, keep going around the bolts in order checking the torque until no further tightening is required to remain at the specified torque value. Do not over torque the bushing bolts or damage may occur. Tighten the set screw over the key in the split taper bushing completely so the screw point locks into the key surface.