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DRIVING YOUR MODEL
Now it's time to have some fun! This section contains instructions on
driving and making adjustments to your model. Before you go on, here
are some important precautions to keep in mind.
• Allow the model to cool for a few minutes between runs. This is
particularly important when using high-capacity battery packs that
allow extended periods of running. Monitoring temperatures will
extend the lives of the batteries and motor.
• Do not continue to operate the model with low batteries or you
could lose control of it. Indications of low battery power include
slow operation and sluggish servos (slow to return to center). Stop
immediately at the first sign of weak batteries. When the batteries in
the transmitter become weak, the red power light will begin to flash.
Stop immediately and install new batteries.
• Do not drive the model at night, on public streets, or in large crowds
of people.
• Drive the TRX-4 primarily in low gear for maximum torque. High
gear can be used for high-speed running on open trails or when
clearing steep slopes or gaps in rocks. Driving in high gear for
extended periods of time can result in the motor and/or ESC
overheating and premature motor wear.
• If the model becomes stuck against an object, do not continue to run
the motor. Remove the obstruction before continuing. Do not push or
pull objects with the model.
• If an obstacle cannot be cleared by slow crawling, slowly increase
the vehicle speed as you drive toward the obstacle to allow the
suspension links and skiplates of the TRX-4 to slide over it.
• Because the model is controlled by radio, it is subject to radio interference
from many sources beyond your control. Since radio interference can
cause momentary losses of control, allow a safety margin of space in all
directions around the model in order to prevent collisions.
• Use good, common sense whenever you are driving your model.
Intentionally driving in an abusive and rough manner will only result
in poor performance and broken parts. Take care of your model so
that you can enjoy it for a long time to come.
• High-performance vehicles produce small vibrations that may loosen
hardware over time. Frequently check wheel nuts and other screws on
your vehicle to ensure that all hardware remains properly tightened.
Operating the High-Low Transmission
TRX-4's High-Low transmission is operated via the red
rocker switch above the transmitter grip; depressing
the upper part of the switch engages Low, depressing
the lower part of the switch engages High. TRX-4 may
be shifted from low gear into high gear at any speed.
For smoother operation, reduce the speed of the model
before shifting from high gear into low gear. This will
reduce strain on the transmission gears. Although TRX-
4's Titan 550 motor has ample torque for climbing and
crawling in second gear, using first gear in situations that
require low speed will extend motor life.
Operating the T-Lock Differentials
The switch on top of the transmitter operates the
front and rear differential locking mechanism. The
differentials can be locked or unlocked at any time
during most driving conditions. If the model is stuck
and there is wheelspin on a single wheel (one side
of an unlocked differential is freewheeling), then
release the throttle and allow the wheels to stop
before locking the differential.
For most driving, the TRX-4 will perform best with both differentials
unlocked or "open" (T-Lock switch back). This will give TRX-4 maximum
steering performance and the tightest possible turning radius, and will
also reduce strain on the drive components. If open differentials cause
you to lose traction over loose terrain or when traversing an obstacle,
you can use the T-Lock switch to lock the front differential or both
differentials. Lock the front differential for enhanced climbing ability
and traction by moving the T-Lock switch to the middle position.
Apply throttle slowly until the T-Lock engages (it will take just a
moment), then use the throttle as needed. Lock both differentials for
maximum climbing ability and traction by moving the T-Lock switch
to the forward-most position. As with a full-size 4WD vehicle, TRX-4's
high-speed handling and steering precision are reduced when one or
both differentials are locked. Locked differentials can be used at any
time, but unlocking the differentials greatly improves vehicle handling
during high-speed driving.
9
TRX-4 • 21
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