Instruction manual

X. BUILDING THE TAIL ROTOR ASSEMBLY

Bags Required: #10A, #10B, and #10C

Tools or Materials Required:

M1.5 Allen tool

M6.0 socket nut driver

M7.0 (9/32@-5/16@) socket (optional)

Small hammer

Small Phillips and straight screwdrivers

Grease

Retaining Ring Pliers

Green Loctite

Step 1: Assembling the Tail Rotor Hub and Blade Holders

Parts Required: Bag #

2 #0019 M3 Locknuts 10A

2 #0021 M4 Locknuts 10A

2 #0097 M3x22 Special 12.9 hard Phillips Pivot Bolts 10A

2 #0446-4 M4 x 0.003” Shim Washer 10A

2 #0457 Thrust Bearing (3 pieces) 10A

2 #0873-1 Tail blade mounts 10A

2 #120-39 M5x4x10 Ball Bearings 10A

1 #122-65 Steel Tail rotor Hub 10A

Refer to drawing #10A

A. Select two #120-39 M5x4x10 Ball Bearings and two #0873-1 Tail Blade Mounts. Press one bearing into each

Tail Blade Mount towards the control arm side. The bearing should be even with the outer surface of the

blade mount.

B. Select two #0457 Thrust Bearings. Each is made up of a ball complement (spaced by a brass retainer) and

two outer grooved rings. This assembly will only function when arranged properly within the blade mount.

Examine each outer grooved ring and determine which one has the larger inside diameter (a simple test is to

slide each onto the #122-65 Steel Tail Rotor Hub and select the one that fits loosely). This ring will be the

first part of the thrust bearing installed in the Tail Rotor blade mounts. Using a socket or wood dowel that

will fit inside the blade mount, install the larger I.D. thrust bearing ring (grooved side facing out) into the

#0873-1 Tail Rotor Blade Mounts. Use light pressure until fully seated. Repeat with the other thrust bearing

and blade mount. Next, apply grease to the cupped side of the ball brass retainer ring and the grooved side of

the outer grooved ring (the small I.D. race).

IMPORTANT:

Thoroughly remove any excess grease from the center I.D hole in the ball race and the outer grooved ring.

This is to ensure that no grease smears onto the threads on the #122-65 Tail Rotor Hub. With the forked end

of the tail rotor blade grips facing upward, install the brass ball retainer race (cupped side facing down)

followed by the outer grooved ring (grooved side facing down) on top of the previously installed inner

grooved thrust bearing ring. Again, look for any grease residue in the I.D. openings.