Inspect the liner in the upper half of the blower housing. Replace if necessary.
Install the blower hub onto the shaft. The key should be in the shaft prior to assembly. Insert the four set screws
and tighten. Tighten the jam nut on each of the set screws.
Assemble the blower blades to the hub assembly. Torque all bolts.
Install the lower portion of the bearing housing onto the blower pedestal. Install the four bolts and hand tighten the
nuts. Assemble the bearings onto the shaft and fit this assembly to the lower portion of the blower housing.
Position the blower blades so that they are centered between the walls of the housing.
Complete the assembly of the bearings following the instructions in Section 3-3-13.
Install the bearing fan sub assembly. Tighten the set screw and the jam nut to prevent it from moving on the shaft.
Install and bolt the exhaust blower liner into the housing.
Position the exhaust blower upper housing onto the lower housing, install and torque the fasteners.
Place the bearing fan guard over the bearing fan and bolt the guard in place.
Bolt the shaft guard in place.
Complete the drive assembly described in Section 3-5-2.
Remove padlock from the breaker and turn breaker on.
Jog the blower drive motor a few times to confirm that the blower is running correctly. Run the motor for a short
period and observe the drives. Recheck belt and chain tension and alignment.
3-5-4 Exhaust Louver
Removal, Repair and Replacement See figure 3-27.
This procedure assumes a complete removal, repair and replacement of the assembly. A partial disassembly repair and
replacement is possible. Follow the procedure to the point of removing only those components requiring repair or
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