2. Adjust both the steering links to be the exact same length (31.7mm -
use “Steering Servo Horn Link Length Template” below to set length).
3. Switch on the power to the receiver and the transmitter.
4. Adjust the steering trim on the transmitter to the neutral “0” position.
5. Connect one end of a steering link to the steering servo saver arm and
the other end to the servo horn
6. Position the steering servo saver arm
perpendicular to the centerline of the vehicle.
7. While holding the steering servo saver arm in
the position mentioned in step 6, install the
servo horn onto the servo such that the
steering link is parallel with the centerline of
the vehicle. This will automatically set the
servo horn at the 7-degree offset shown in
the illustration.
8. Install the second servo horn on the other side
following the same procedure.
If necessary, fine-tune the length of the second steering link to eliminate
any load on the steering system in the neutral position.
If you are using aftermarket servos, it is important to use servo horns
designed for Revo. Optional steering servo horns are sold separately for
use with non-Traxxas servos.
Servo Saver Tuning
An optional stiffer spring is available for the servo saver when using servos
with metal gear sets (see parts list for details). Do not use this spring with
standard Traxxas high-torque servos.
Brake Setup & Adjustment
Revo is equipped with a disc brake that rides on the yoke of the
transmission’s front output shaft. The brake is preset at the factory and
should not require attention. As the brake material wears, future
adjustments may be necessary.
Brake Shoulder Screw Adjustment
The two shoulder bolts that are used to secure the brake pads to the
transmission housing may need to be adjusted periodically as the brake
material wears down. They should be
tightened so a 0.50mm (.020") gap
exists between the disk and the brake
pad (on the transmission side). Adjust
in one of the following ways:
1. Use a .50mm feeler gauge between
the brake pad insert and brake disk.
2. Push the outer brake pad firmly against the inner pad with your finger,
sandwiching the brake disk between the brake calipers. Tighten the
brake shoulder bolts until they just barely
touch the brake pads. Do not over tighten
these fasteners or you could damage the
brake calipers. Loosen each of the shoulder
bolts by 1 turn.
Brake Linkage Adjustment
When correctly adjusted, the brake linkage
spring should barely touch the rod guide
when the servo is in neutral position
(closed throttle). This will ensure no brake
drag during operation of the vehicle. The
brake adjustment knob can be threaded
away from the spring for less braking
power if desired. Do not adjust knob to
apply pressure against the spring while
the servo is in the neutral position. This
will induce brake drag and cause undesirable handling.
The position of the z-bend from the factory is in the middle position of the
servo horn. Changing this position will affect the way the brake force is
applied. The brake adjustment knob will need to be readjusted if this
position is changed.
Brake Pad Wear and Replacement
During normal use the brake pads should wear at a relatively slow rate.
However, if the brake pads wear down close to the metal pad holders, they
should be replaced. Any more wear than this could cause damage to the
brake parts and improper operation of the brake system.
Revo 3.3
•
39
Steering Link Length Template
61.7mm
0.5mm
gap
Less Brake
Front of Truck
Brake
Linkage
Spring
Basic Tuning Adjustments
