Instruction manual

III. INSTALLING THE MAIN SHAFT, MAIN GEAR AND FRONT TAIL DRIVE

Bags Required: #3A, #3B, #3C, #7D

Tools or Materials Required:

M1.5, 2.0 and 2.5 Allen tools

M5.5 flat wrench

Tri Flow #4801 or similar Teflon oil

Step 1: Installing the Front Tail Rotor Drive Gear and Shaft

Parts Required: Bag #

3 #0051 M3x3 Socket Set Screws 3A

1 #0232 15 Tooth Bevel Gear 3A

1 #0237 M5 Retaining Collar 3A

1 #120-9 Front Transmission Shaft 3A

Refer to Drawing #3A

A. Select one #120-9 Front Transmission Shaft, one #0237 M5 Retaining Collar, and one #0232 15 Tooth Bevel

Gear. Examine the drawing and note the orientation of these parts. Insert the #120-9 Front Transmission

Shaft from the rear of the main frame through the bearing in the #115-10 Vertical Rear Channel. With 25-

30mm exposed in front of the bearing, slide the #0237 M5 Retaining Collar, followed by the #0232 Bevel

Gear, onto the shaft.

B. Select one #0051 M3x3 Socket Set Screw, apply blue Loctite and partially thread into the #0237 M5

Retaining Collar. Push the shaft forward into the #120-8 Front Transmission Block and bearing. Apply

forward pressure on the white Delrin portion of the #120-9 Front Transmission Shaft while pressing rearward

on the #0237 M5 Retaining Collar. Tighten the #0051 M3x3 Socket Set Screw within the collar. Check to

see that no end-play exists in the shaft. If there is end-play, then reposition the collar.

C. Select two #0051 M3x3 Set Screws. Note the #120-9 Front Transmission Shaft has a Aflat@ for a set screw

securing the #0232 Bevel Gear. Select one #0051 M3x3 Set Screw and install it into the gear, tightening it

enough to be certain it has engaged the Aflat@ and the gear can be moved for final positioning. Set the final

gear position after the main gear is installed, observing the rule that the bevel gear be centered within the main

gear. Check this for a full rotation of the main gear. Always remember to install the remaining #0051 M3x3

Socket Set Screw and double check the contact of the first set screw within the Aflat@ provided. Use Blue

Loctite on each set screw.