Losi LOSB0105BD - Manual (Page 18)

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 Strike SCT. 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:
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 over geared and drawing a lot of
current. The gear combination that comes on the 1/10 Strike
SCT (20-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.
Tuning the Chassis of the 1/10 Strike SCT (CONT’D)
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 Strike SCT comes equipped
with foam battery spacers 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 compo-
nents which will wear out from use: tie rod ends (part
LOSB2015), the servo saver (part LOSB2356). You can
easily replace these components to restore factory
specifications.
Spur Gear Size
X 2.55 = Final Drive Ratio
Pinion Gear Size
18