7
SPEED CONTROL
TROUBLESHOOTING GUIDE
NOTE:
The Sprint has built-in circuitry to sense excessive
heat caused by current overload. If the ESC overheats, it will
automatically shut down, as indicated by fl ashing red and
green LEDs. This is to protect all onboard components and
prevent permanent damage. The ESC can be used again
once the internal temperature returns to an acceptable level.
Reset by cycling the power.
IF YOUR ESC DOES NOT WORK
Problem: Motor and/or steering servo are dead.
•
Recharge dead batteries.
•
Check for faulty power connections.
•
Check for a damaged connection between ESC and Rx.
•
Internal damage. Unit may require service. See “Repair
Service” on page 3.
ESC WORKS BUT OTHER PROBLEMS EXIST
Problem: Steering servo works but motor is dead.
•
Motor brushes are dirty or the motor is bad. Clean with a
motor spray (such as DuraTrax Power Shot, DTXC2458) or
replace the motor.
•
Check for faulty motor connections.
Problem: Overheated motor or hot power plugs.
•
Motor is geared too high. Change to a smaller pinion gear
or a larger spur gear.
•
Binding in the vehicle’s drivetrain. Check to make sure
nothing is interfering with the model’s drivetrain.
•
The motor is shorted electrically. Check the motor for shorts
and replace if necessary.
•
Check for faulty motor connections.
Problem: Motor runs backwards but forward LEDs are on.
•
Motor is wired backwards. Swap the motor wires.
Problem: Motor runs backwards and the reverse LED is
on when forward command is given.
•
Move the Tx throttle reversing switch to the opposite position.
Problem: Model runs properly, then motor goes dead.
•
The built-in thermal protection may be automatically
shutting down power to the ESC due to overheating. Check
for binding drivetrain, bad motor or incorrect gear ratio.
Adjust gear mesh, replace motor or change gear ratio.
Allow the ESC to cool and try again.
MAINTENANCE
TIPS
Before Each Run
1. Check to make sure that all screws are tight and none are
missing.
2. Check to make sure that the transmitter batteries are not
low.
3. Check to make sure that all of the moving parts of the
Evader move freely and do not bind.
4. Check for broken or damaged parts. Replace any broken
or damaged parts before running the Evader EXT2.
Running the truck with broken or damaged parts could
result in damage to other parts.
5. Check to make sure that the receiver and speed control
are still properly secured to the chassis.
6. Check to make sure that all wires are properly connected.
7.
IMPORTANT!
Check the slipper clutch setting. The Evader
EXT2 transmission is equipped with a slipper clutch.
When properly adjusted the slipper clutch will help to
extend the life of the transmission by providing a point that
slips when the kit encounters bumps, and jolts that would
otherwise transfer strain to the internal gears. Although
there is no perfect setting for every situation, following the
recommended procedure on page 9 will provide a good
starting point. Final adjustments will need to be made with
the kit on the actual surface it will be running on.
After Each Run
1. Clean any large globs of dirt or debris from the chassis
and moving parts.
2. Disconnect and remove the battery from the Evader EXT2.
3. Check for any broken or damaged parts. This way parts
may be replaced before the next run.
After Every 10 Runs
1. Check the servo saver for proper operation. During normal
maintenance, check the operation of the servo saver by
grasping the servo arm and linkage and turning one of the
front tires left and right. If the wheels turn without moving
the linkages and servo arm, then the unit is operating
properly. If the linkage and servo arm move, loosen the
knurled adjustment nut on the left side servo saver shaft.
If the servo saver becomes clogged with dirt, it may not
work properly which could cause servo or linkage damage.
The servo saver needs to be disassembled, cleaned and
readjusted. To safely adjust the servo saver, loosen the
knurled aluminum collar on the left side steering post
completely. Then reinstall 1-1/2 turns onto the post. Retest
the servo saver as described above. Loosen or tighted the
servo saver as needed.
2. Check to make sure that the bushings are free of dirt and
debris and roll smoothly.
3. Check the shocks for oil leakage. If the shocks have leaked,
you should properly refi ll the shocks for best performance.
Inspect the shock shafts for deep scratches.
4. Check for proper gear mesh between the spur gear and
the pinion gear.
