Fan Hub Installation
5–Position the bushing-hub assembly over the Geareducer fan shaft. Carefully align the bushing bore keyway with the previously installed shaft key—or if using a Type 2 split taper bushing, align the shared hub/bushing key with the fan shaft keyway. Lower the assembly onto the shaft. The assembly must slide onto the output shaft enough to ensure the shaft key runs the entire length of the bushing bore. It may be necessary to slightly wedge open the split taper bushing for easier engagement of the fan shaft into the bush- ing bore. This can be accomplished by driving a wedge into the bushing flange split.
6–Using a torque wrench, tighten the stainless steel cap screws sequentially until each is tightened to 140 ft·lbƒ (190 N·m). When the cap screw torque is at or near 140 ft·lbƒ (190 N·m), make at least two more sequential rounds to assure all cap screws are to the required torque value.
Type 1 U1 Split Taper Bushing
Figure 4 | Type 2 U1 Split Taper Bushing |
