Installing and Adjusting your RC 8IGHT Throttle/Brake Linkage

Before proceeding, become familiar with the operation of your radio system. Refer to your operation manual and become familiar with the End Point Adjustment (EPA) or Travel Adjustment for throttle, brake, and all trim adjustments.
Brake Disc and Pad Set-up
Proper brake pad to disc clearance is essential for optimal braking performance, use this method for initial set-up and maintenance and to check the presets from the factory. Due to normal brake wear, this setting should be checked after every 60-90 minutes of use.
1 With the radio tray powered off and the throttle servo arm removed, move the brake linkage wires towards the engine to the full throttle position.
2 Push the brake pads closed towards the center diff mount by hand. The brake cams and linkage should not engage, if they are engaged the pads will not compress all the way to the      center diff mount.
3 Using a 4-40 washer as a gauge, adjust the brake screw to set the gap between the head of the screw and the brake pad to .020 - .030” (0.5 - 0.75mm). The washer should snug into the gap. (Fig. 1)
NOTE: Removing the center diff assembly will make this adjustment easier.
4. Repeat on all four brake screws.

Installing the Throttle Linkage
1. Turn on your transmitter. Adjust the throttle trim on the transmitter to the neutral or centered position, this will allow for? New adjustment later.
2. With the servos, receiver, switch and charged receiver battery installed and connected, turn on the radio tray. When throttle is applied, ensure the servo is rotating in the proper direction. (Fig.2)

NOTE: To change the servo rotation, locate the servo reversing function on your transmitter and switch the direction of the servo.
3. Select a servo adapter that matches the number of splines on your servo (refer to your owners guide).
4. Place the servo arm adaptor onto the output shaft of the servo. Aligning the throttle servo arm parallel with the side of the servo case, place the arm onto the splines of the adaptor.
If there is a slight angle, use the trim adjustment on your radio to position the arm as shown (Fig. 3). Secure the throttle servo arm with the screw supplied with the servo.

NOTE: If the arm cannot be positioned as shown using trim adjustment, the angle can be changed by removing the arm and adaptor and rotating the adaptor one spline in either direction
until the arm is positioned as shown (Fig. 3).

5. Snap the throttle linkage ballcup onto the carburetor ball.
The linkage should be level with the bottom of the chassis, and NOT hitting the servo case.
Test for free movement. If necessary, rotate the ball/ring on the carburetor. (Fig. 4)

Copyright 2002-2008 Ricks RC Racing. All Rights Reserved.
Copyright 2008 Horizon Hobby, Inc. All Rights Reserved. Used With Permission.