EN
9
INSTRUCTION MANUAL
SPEKTRUM
™
FIRMA
™
2200Kv 4-POLE BRUSHLESS MOTOR
TROUBLESHOOTING GUIDE
Problem
Possible Cause
Solution
Vehicle does not operate
Battery not charged or plugged in
Charge battery/plug in
ESC switch not "On"
Turn on ESC switch
Transmitter not "On" or low battery
Turn on/replace batteries
Motor runs but wheels
do not rotate
Pinion not meshing with spur gear
Adjust pinion/spur mesh
Pinion spinning on motor shaft
Tighten pinion gear setscrew on motor shaft flat spot
Transmission gears stripped
Replace transmission gears
Drive pin broken
Check and replace drive pin
Steering does not work
Servo plug not in receiver properly
Make sure the steering servo plug is connected to the receiver steering channel,
noting proper polarity
Servo gears or motor damaged
Replace or repair servo
Will not turn one direction
Servo gears damaged
Replace or repair servo
Motor does not run
Motor wire solder joint is damaged
Resolder the motor wire with the proper equipment
Motor wire broken
Repair or replace as needed
ESC damaged
Contact Horizon Hobby Product Support
ESC gets hot
Motor over-geared
Use smaller pinion or larger spur gear
Driveline bound up
Check wheels and transmission for binding
Poor run time and/or
sluggish acceleration
Battery pack not fully charged
Recharge battery
Charger not allowing full charge
Try another charger
Driveline bound up
Check wheels, transmission for binding
Poor range and/or glitching
Transmitter batteries low
Check and replace
Vehicle battery low
Recharge battery
Loose plugs or wires
Check all wire connections and plugs
PRECAUTIONS
• Never touch moving parts.
• Never disassemble while the batteries are installed.
• Always let parts cool before touching.
GEARING
Your vehicle has been equipped with the optimal gearing installed for the
use of a 3 or 4S battery. It offers an ideal balance between speed, power
and efficiency.
Installing a pinion gear with fewer teeth or a spur gear with more teeth
will provide greater torque but will reduce top speed. Likewise, a pinion
gear with more teeth or a spur gear with fewer teeth will reduce torque
and increase top speed. Care should be taken when installing larger
pinion gears as this can "overgear" the vehicle, resulting in overheating
of the motor and ESC. When testing different gearing options, pay close
attention to the temperature of the motor and speed control to ensure you
are operating within the temperature range of the components. The motor
or ESC should never be so hot that it cannot be touched. If temperatures
are too hot, a different gearing combination with a lower pinion gear and/or
higher spur gear is suggested.
SETTING THE GEAR MESH
Proper gear mesh (how gear teeth meet) is important to the performance
of the vehicle. When the gear mesh is too loose, the spur gear could be
damaged by the pinion gear of the motor. If the mesh is too tight, speed
could be limited and the motor and ESC will overheat.
The pinion gear setscrew can be accessed by rotating the motor until the
setscrew lines up with the notch in the side of the motor mount.
The gear mesh has already been set at the factory and is adjusted by
rotating the motor mounting screw hole locations. When using the stock
pinion and spur gear sizes, the motor mounting screws should be in the
mounting holes shown in the illustration to maintain proper gear mesh.
Adjusting the gear mesh is only necessary when changing gears.
1. Remove the right body side panel.
2. Remove the gear cover.
3. Remove the two screws holding the motor to the mount.
4. With your chosen gear installed on the motor shaft, select the pair of
motor mounting holes which allow for the tightest gear mesh without
having to force the gears together or forcing the motor holes to line up
with the mount.
5. Install the two motor mounting screws and washers. There should be
just enough space between the pinion and spur gears that a small piece
of paper can be rotated between the gears easily. If the paper is difficult
to rotate into the gears, remove the mounting screws and rotate the
motor to the next set of mounting holes. Re-install the mounting screws.
6. Remove the paper. Check the mesh at 3–5 different locations around the
spur gear for a small amount of movement.
7. Install the gear cover.
TELEMETRY SETTINGS
If using the Spektrum Dashboard app or the optional speedometer module
on your transmitter, set the motor pole count to 4 and the rollout distance to
1.57" (39.9mm).
Stock motor
mount holes