SLASH VXL • 25
Adjusting Gear Mesh
Incorrect gear mesh is the most common cause of
stripped spur gears. Gear mesh should be checked
and adjusted anytime a gear is replaced.
To set the gear mesh, cut a narrow strip
of notebook paper and run it into the
gear mesh. Loosen the motor screws and
slide the motor and pinion gear into the
spur gear. Retighten the motor screws
and then remove the strip of paper. You
should be able to run a fresh strip of paper
through the gears without binding them.
Adjusting the Slipper Clutch
The model is equipped with an
adjustable slipper clutch that is
built into the large spur gear. The
purpose of the slipper clutch
is to regulate the amount of
power sent to the rear wheels
to prevent tire spin. When
it slips, the slipper clutch
makes a high-pitch, whining
noise. Remove the rubber
slipper clutch plug on the transmission cover in order to adjust the
slipper. Use the 4-way wrench to turn the adjusting nut clockwise
to tighten and counterclockwise to loosen. Place the model on
a high-traction surface, such as carpet. Adjust the slipper so that
you can hear it slip for approximately two feet from a standing, full
throttle start. (Learn more about adjusting the slipper clutch in the
sidebar.)
Centering Your Servo
If you have removed the servo horn from your model’s steering
servo, or the servo has been removed for service or cleaning, the
servo must be re-centered prior to installation of the servo horn or
installation of the servo into the model.
1. Remove the servo horn from the steering servo.
2. Connect the steering servo to channel 1 on the receiver. Connect
the electronic speed control (ESC) to channel 2. The white wire on
the servo lead is positioned towards the receiver’s LED.
3. Turn the transmitter power switch on. Make certain the
transmitter’s batteries are not depleted.
4. Turn off TSM (see page 16).
5. Turn the transmitter’s steering trim knob to the center “0” position.
6. Disconnect motor wires “A” and “C” (see page 11) to prevent the
motor from turning during the next steps. Connect a fresh battery
pack to the speed control and turn on the ESC (see page 14). The
servo’s output shaft will automatically jump to its center position.
7. Install the servo horn onto the servo output shaft. The servo horn
should face toward the center of the chassis and be perpendicular
to the servo body.
8. Check servo operation by turning the steering wheel back and
forth to ensure that the mechanism has been centered properly
and you have equal throw in both directions. Use the transmitter’s
steering trim knob to fine-tune the position of the servo horn so
the model tracks straight when the steering wheel is at neutral.
Motor
Screws
Strip of
Paper
ADJUSTING YOUR MODEL
Velineon 3500 Specs
Type:
Sensorless brushless
rpm/volt:
3500
Magnet type:
Ultra High-Temperature
Sintered Neodymium
Connection type :
3.5mm bullet
Wire size:
12 Gauge
Max rpm:
50,000
Diameter:
36mm (1.42) (540 size)
Length:
55mm (2.165)
Weight:
262g (9.24oz)
The VXL-3s features Locked
Rotor Protection. The VXL-3s
checks to make sure the
motor is turning. If the motor
is locked or damaged, the
ESC will enter fail-safe until
the motor is free to rotate.
Always use the proper length
motor bolts. The standard
motor mounting bolts
are 3x8mm. Using motor
bolts that are too long can
interfere with the motor’s
rotation and damage the
motor’s internals!
Tighten
Loosen
