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19
Battery Position
: This is a critical adjustment that is often
overlooked but can be very useful. Start by running the battery
spaced in the back (standard setup with 6-cell battery pack).
Having the battery in the back can improve rear traction on
slippery surfaces and steering response. Having the battery
back too far can cause the rear end to swing through turns on
some tracks and “dump” the rear end causing instability issues.
This is a result of having the weight too far back. The 1/10
HIGHroller comes equipped with one foam battery spacer to
accommodate different size battery packs.
Wheels and Tires
The tires come pre-mounted with the vehicle and should be
checked to make certain they stay glued to the wheels. The
wheel spinning speeds can pull the rubber tire away from the
rim. When a tire or tires come loose from the rim, you will notice
the vehicle is hard to control.
Tip the vehicle on its side and using both hands to hold one
wheel at a time, use your thumb to press the tire away from
the rim. If you see a tire pull away for the rim use Losi Tire Glue
(LOSA7880 thick or LOSA7881 thin) to re-glue. It only takes a
small drop of glue generally. Be careful; this is CA-type glue and
you do not want to glue your fingers to the wheel and tire.
Use safety goggles when gluing tires.
Check the mounting of the tire periodically to ensure proper
performance and handling.
Steering Assembly
: Occasionally, check the steering assembly
and you may notice increased looseness. There are several
components which will wear out from use: tie rod ends (part
LOSB2015), the servo saver (part LOSB2358). You can easily
replace these components to restore factory specifications.
Adjusting Gear Mesh
Incorrect gear mesh is the most common cause of stripped spur
gears. To set the gear mesh, one method is to cut a narrow strip
of notebook paper and thread it in between the gears. 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. Or you can loosen the motor and carefully slide
the motor leaving a small amount of backlash (play) between
the spur and pinion gears. It should not be tight and if you look
up-close there should be slight movement of the spur before
contacting the teeth on the pinion gear.
Gear Ratio
Changing the gearing provides you a quick and easy way to
tune the 1/10 HIGHroller. Use the temperatures of both the
motor and your battery pack as a guide to gearing to your
environment. When the Motor is above 160-170 degrees
Fahrenheit or the batteries are above 125-135 degrees
Fahrenheit, these are both strong indications that you should
drop the pinion size smaller. This would be a lower gear ratio
or larger number, for example from 11.25 to 12.40. Going up
a pinion size is called gearing higher or a small number, for
example 11.25 to 10.6, and will increase power consumption
and allow more speed.
Use the following formula to calculate the overall ratio for
combinations not listed on the gear chart:
Spur Gear Size
Pinion Gear Size
X 2.55 = Final Drive Ratio
When using higher gear ratios, it is extremely important to
monitor the temperatures of the battery and motor. If the
battery is extremely hot, and/or the motor is so hot that you
cannot touch it, most likely you are overgeared and drawing a
lot of current.
The gear combination that comes on the 1/10 HIGHroller
(12-tooth pinion / 90-tooth Spur) provides the power for
running through mowed grass and off-road dirt surfaces.
Storage
When you are through running the model for the day
•
Blow it off with compressed air or use a soft bristled paint
brush to dust off the vehicle.
•
Always disconnect and remove the battery from the
model whenever the model is stored. If the model will
be stored for a long time, then also remove the batteries
from the transmitter.
Many questions are the result of simple user errors or minor
adjustments which are easily addressed. If after reading
below you cannot resolve your problem, then please call the
appropriate Horizon Product Support office.
Radio system does not work properly:
If the power light on the transmitter is not turning on, first
ensure the batteries are installed correctly. You should also
check that the batteries are good and/or if rechargeable are
fully charged. Replace them if needed. If the power light is
blinking, then the transmitter batteries are weak and should be
replaced.
Short radio range:
If the radio range appears short, make sure the batteries are all
fully charged and/or are in good condition. Another tip is to
make sure that your receiver’s antenna extends outside of the
body.
Steering works but the motor will not run:
The speed control may have gotten too hot and thermally
shut down. Allow time for the speed control to cool. If this is
the problem and has happened a few times, consider using a
smaller pinion or a larger spur gear.
Check the transmission, do the rear wheels spin easily?
Check that a motor wire has not come loose.
Verify that the electronic speed control is plugged into the
throttle channel of the receiver.
Check using another battery. Contact Horizon support for
service instructions.
Steering servo does not work:
Check all wires, radio system, battery connectors and the
battery pack.
Contact Horizon support for service instructions.
Motor runs backwards:
The black wire lead from the motor should be connected to the
black wire lead from the ESC and the same for the red wires.
If not, please correct by swapping the wires. If you are still
experiencing problems please contact Horizon support.
Motor starts running immediately after the battery has
been connected.
There may be internal ESC damage. Contact Horizon
customer support.
Troubleshooting your 1/10 HIGHroller
Vehicle runs slowly/slow acceleration:
Check the battery connectors.
Confirm that the battery is charged.
Vehicle will not reverse:
Make sure the throttle trim is at neutral.
Recalibrate/Set up the ESC (see page 8).
Check to see if the ESC is in forward only mode that does not
have reverse active.
Keep stripping spur gears:
Improper gear mesh, refer to page 18.
Improperly adjusted slipper, refer to page 17.
