Losi LOSB0083 - Manual (Page 4)

1. For most applications, begin by setting the braking bias to 40% front, 60% rear.
2. Brake bias is adjusted by adding or removing either front or rear brake. It is best to add to the under-powered brake to obtain
the desired bias.
For example: if there is too much front brake bias, add rear brake by rotating the upper adjustment knob counter-clockwise. If
there is too much rear brake, add front brake by rotating the upper brake knob counter-clockwise to obtain the desired bias.
3. Adjust only ONE brake rod at a time, a maximum of a ¼ turn, and re-check the bias with the method used above. Repeat
until the desired brake bias is achieved.
4. Return the throttle to neutral and turn the spur gear by hand. No resistance should be felt while turning the spur gear at
neutral throttle.
5. If the brakes are dragging, turn BOTH adjustment knobs clockwise the exact same amount (¼ turn at a time) until the spur
gear turns freely.
6. Always go back and check the bias after making any adjustment.
7. The brake system requires very little pressure to operate, and should engage quickly with only a small amount of servo arm
movement (0.050”)(1.3mm).
8. The brake bias has now been set, and linkage adjusted, fi nal braking power will be set later for various driving conditions.
Checking the Brake Bias
Brake bias is the difference between the amount of rear and front braking pressure.
1. To check the amount of rear brake bias, place the vehicle on a table, move the trigger to the full brake position and press
down on both front and only one rear wheel to keep them from rotating.
2. Lift the remaining rear wheel off the table and rotate it in the forward direction. The resistance required to rotate the wheel, is
the amount of rear brake being applied. This may vary from little resistance to full lock up.
3. Take note of how much resistance is required to turn the wheel.
4. Repeat for the front brake by holding both rear and only one front wheel. Again moving the trigger to the full brake position
and rotating the other front wheel, noting the resistance required.
5. Do this several times for both the front and rear brakes to establish a “feel” for the applied braking resistance. Often the resis-
tance will be different from front to rear.
Adjusting the Brake Bias
If any of these conditions exist, the linkage has not been properly adjusted, repeat this procedure until the
linkage has been properly adjusted
Linkage Adjustment Checklist
1. The linkage must be free for movement and not bind.
2. The linkage should not hit anything, servo, body etc.
3. The servo should not move more than 0.050” (1.3mm) before the brakes start to engage.
4. At least 0.250” (6.5mm) of travel should be allowed for the throttle return spring.
5. The brakes should not drag at neutral throttle.