7
SPEED CONTROL
TROUBLESHOOTING GUIDE
NOTE:
The Sprint 2 has built-in circuitry to sense an excessive
heating condition 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 on-board
components and prevent permanent damage from occurring.
The ESC can again be used 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 lower gear setup.
•
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 conditions.
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 there are
not any screws 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 EXT. 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
EXT 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 EXT.
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. Adjust the servo
saver tighter or looser if 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 any
shock fl uid out, 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.
