AN 01-25CN-2

PARAGRAPH 6

NOTE:    The positioning of the blades is done when the hub and blade assembly is mounted on the engine shaft, otherwise, the setting of the blade sector gears would be disturbed in hand. ling and assembly to engine shaft. (8) TO ASSEMBLE PROPELLER TO ENGINE SHAFT.   (d) There are two points to make sure of when placing the propeller and hub assembly on engine propeller shaft, namely: make sure that the brushes have been removed from brush housing (remove the two safety pins, unsnap and lift out brush unit) (see Fig. 80), and that the engine propeller shaft has been turned so that the master spline is at the bottom. Have the master spline of the hub at the bottom so that the matching or alignment of these two master splines will be easier to align. (See Fig. 81.) Clean engine propeller shaft with varnoline and then coat the splines with castor oil. The shaft threads are painted or coated with anti-seize thread lube.   (b) PROPELLER SHAFT NUT-just before assembling propeller to engine shaft, install grease seal, split cone, and propeller shaft nut in hub.

NOTE:    The halves of the split cone must be placed over the propeller shaft nut, and the cone and nut are installed as a unit. Place propeller assembly on to propeller shaft and tighten the propeller shaft nut securely with the propeller shaft extension nut provided. Use a round steel bar (approximately 4 feet long) inserted completely through the two holes of extension nut for this tightening. (See Fig. 82.) Install propeller shaft locking sleeve and locking pin assembly.   (c) BRUSHES ON HUB SLIP RINGS-At this point, apply persian blue to the four top brushes of the brush unit and place brushes back into the brush housing. Snap into place with the top and bottom snaps. Swing the propeller blades backwards and forwards just a trifle, this will show clearly how the brushes are riding on the hub slip rings.

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