Rev. Date: 12/20/21
Page 14
Fan Removal for Replacement:
1. Remove fan chamber cover. (See Illust. H)
2. Remove cap screws and insert them in tapped holes in bushing flange.
3. Tighten cap screws progressively in a clockwise rotation placing equal
amounts of torque until bushing disengages.
4. Remove fan from jack shaft.
Fan Installation for Replacement:
1. Be sure the tapered cone surfaces of the bushing and the inside of the fan are clean.
2. Place bushing loosely into hub on fan. (See illust. I)
3. Start capscrews by hand, turning them just enough to engage the threads.
Note: Do not use a wrench at this time.
4. With key in shaft keyway, slide fan and bushing on to jack shaft.
Note: Make sure fan blades are facing
outward and that the bushing is seated against the back step of the jack shaft. There should be
approximately an 1/8" gap between the fan and chamber so they don't rub.
(See Illust. J)
5. Tighten capscrews progressively with a wrench in a circular direction to ensure equal tension as fan draws down on
shaft to achieve 192 inch pounds torque.
Note: Do not attempt to pull bushing flange flush with hub end;
some gap must remain between flange and hub after tightening.
6. Install fan chamber cover and secure with bolts. (See Illust. H)
(Illust. I)
(Illust. J)
(Illust. H)