Installation

Rotation and Flow Direction

The rotation direction is correct when the airflow moves from the convex back (suction surface) of the blade, to the concave side (pressure surface). Figure 1 shows the conventional clockwise di- rection of rotation and normal direction of airflow as viewed from the discharge face of the rotor.

Flow Direction

Figure 1

Installation Instructions

1––Remove blade pillow block and fasteners 4, 5, 6, 7, 15 from the hub disk, one set a time (Figure 2).

2––If the hub has not been supplied already assembled to the flange, install the coupling flange 2 on the disk 3, complying with torque settings, bolt orientation, tightening order, and pins as shown in the table following Figure 2.