Fan Hub Installation
| 1 | 1/2" | 1/2" |
GEAREDUCER | | 1 |
5/8" MIN | |
FAN SHAFT | |
1 3/8" 
TAPERED SIDE
Figure 2OF KEY 36 and 38 Geareducer
3–Raise the hub assembly above the fan shaft for installation. Slowly lower the assembly onto the shaft with the keyways aligned. Make certain the key does not slide down during installation. Stake the key in the keyway with a center punch if necessary.
After the hub assembly is installed the bottom end of the key must extend through the bottom of the center hub, and the top end of the key must extend 5/8″ (16mm) minimum above the top of the fan shaft. Do not force the key down once these criteria are met.
4–Figure 3 illustrates proper retention plate and hardware installa- tion. The retention plate is designed to allow clearance for the fan shaft key, and when properly installed will not extend over or inter- fere with the key in any way. Torque the retention bolts to 70 ft·lbƒ (95 N·m) then turn up the locking strap corners to prevent the bolts from loosening.
| RETENTION |
| PLATE |
| FAN HUB |
RETENTION | KEY |
BOLTS | |
Figure 3
36 and 38 Geareducer
LOCKING
STRAPS
