Instruction manual

Step 6: Installing the Ball Bearing servo Output Supports

Important Note: Futaba and Hi-Tech servos require an M2.6 threaded fastener/bearing pivot (#115-73) for

retaining the servo wheel and J.R./Sanwa require an M3.0 threaded fastener/bearing pivot (#115-74). Do not

make any substitutions for the correct parts or a failure could occur.

Parts Required Bag #

4 #0016 M3 Ainternal toothed@ lock washers 12H

2 #0037 M2.5x25 Phillips screws 12H

6 #0037-1 M2.5x30 Phillip screws 12H

4 #115-73 M2.6 pivot stud (Futaba , Hi-Tech) 12H

4 #115-74 M3.0 pivot stud (J.R./Sanwa only) 12H

2 #115-80 M2.8x4.5x16.5 spacer tube 12H

6 #115-82 M2.8x4.5x23.0 spacer tube 12H

4 #115-86 Servo output support plates with ball bearings (J.R./Sanwa, Futaba) 12H

8 #0560-8 M2.5 flat washers 12H

Note: for any application utilizing Futaba servos, the appropriate Futaba servo wheel must be modified for

clearance as shown in drawing 12E. Position Servos #1 through #3 at neutral and modify each wheel at this time.

A Dremel tool with a coarse sanding drum is most useful for this procedure.

Refer to drawings #12E

and #12I

A. Support installation on Servo #1. Select one appropriate pivot stud (#115-73 for Futaba/Hi-Tech or #115-74

for J.R./Sanwa) and one #0016 lock washer. Remove the factory supplied screw retaining the servo arm

(wheel) and install the pivot stud and lock washer in it=s place.

B. Select the two #0037 M2.5x25 Phillips screws, the two #115-80 spacer tubes, support plate #115-86 and two

#0560-8 M2.5 flat washers. Examine the support plate and note the flanged side of the ball bearing. This

flange must face the servo arm (wheel).

C. Press the support plate (with ball bearing) onto the pivot stud about one quarter the length of the stud. Each

end of the support plate is secured to the right main frame by a #0037 M2.5x25 screw, a #115-80 spacer tube

and a #0560-8 M2.5 flat washer. The washer must be next to the frame. Install the hardware at each end with

Loctite and moderate torque. Note: allow the support plate to Acenter@ itself before simultaneously tightening

the screws to avoid inducing a Apre-load@ to the servo.

D. Installation on Servos #2 through #4. The procedure for these servos is the same except that all spacer tubes

and corresponding screws are changed. The longer spacer tubes #115-82 and screws #0037-1 are used.