Vaterra TWIN HAMMERS KIT User manual

OWNER’S MANUAL
bedienungsanleitung
manuel de l’utilisateur
manuale dell’utente
TWIN HAMMERS™

EN

SAFETY PRECAUTIONS AND GUIDELINES
»Always keep a safe distance in all directions around your
model to avoid collisions or injury. This model is controlled
by a radio signal subject to interference from many sources
outside your control. Interference can cause momentary
loss of control.
»Always operate your model in open spaces away
from full-size vehicles, trac and people.
»Always carefully follow the directions and warnings for this
and any optional support equipment (chargers, rechargeable
battery packs, etc.).
»Always keep all chemicals, small parts and anything electrical
out of the reach of children.
»Always avoid water exposure to all equipment not specifically
designed and protected for this purpose. Moisture causes
damage to electronics.
»Never place any portion of the model in your mouth as it
could cause serious injury or even death.
»Never operate your model with low transmitter batteries.
REGISTER YOUR
VATERRA PRODUCT ONLINE
Register your vehicle now and be
the first to find out about the latest
option parts, product updates and
more. Click on the Support tab at
WWW.VATERRARC.COM and follow
the product registration link to
stay connected.
NOTICE
All instructions, warranties and other collateral documents are subject
to change at the sole discretion of Horizon Hobby, Inc. For up-to-date
product literature, visit www.horizonhobby.com and click on the
support tab for this product.
WARNING: Read the ENTIRE instruction manual to become familiar with the
features of the product before operating. Failure to operate the product correctly
can result in damage to the product, personal property and cause serious injury.
This is a sophisticated hobby product and NOT a toy. It must be operated with
caution and common sense and requires some basic mechanical ability. Failure
to operate this Product in a safe and responsible manner could result in injury or
damage to the product or other property. This product is not intended for use by
children without direct adult supervision. Do not attempt disassembly, use with
incompatible components or augment product in any way without the approval
of Horizon Hobby, Inc. This manual contains instructions for safety, operation and
maintenance. It is essential to read and follow all the instructions and warnings
in the manual, prior to assembly, setup or use, in order to operate correctly
and avoid damage or serious injury.
MEANING OF SPECIAL LANGUAGE
The following terms are used throughout the product literature to
indicate various levels of potential harm when operating this product:
NOTICE: Procedures, which if not properly followed, create a possibility
of physical property damage AND a little or no possibility of injury.
CAUTION: Procedures, which if not properly followed, create the
probability of physical property damage AND a possibility of serious injury.
WARNING: Procedures, which if not properly followed, create the probability
of property damage, collateral damage, and serious injury OR create a high
probability of superficial injury.
AGE RECOMMENDATION: Not for children under 14 years. This is not a toy.
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4

EN
GENERAL PRECAUTIONS
»Read through the wet conditions maintenance procedures
and make sure that you have all the tools you will need to
properly maintain your vehicle.
»Not all batteries can be used in wet conditions. Consult the
battery manufacturer before use. Do not use Li-Po batteries
in wet conditions.
»Most transmitters are not water-resistant. Consult your
transmitter’s manual or the manufacturer before operation.
»Never operate your transmitter or vehicle where lightning
may be present.
»Do not operate your vehicle where it could come in contact
with salt water (ocean water or water on salt-covered roads),
contaminated or polluted water. Salt water is very conductive
and highly corrosive, so use caution.
»Even minimal water contact can reduce the life of your motor
if it has not been certified as water-resistant or waterproof. If
the motor becomes excessively wet, apply very light throttle
until the water is mostly removed from the motor. Running a
wet motor at high speeds may rapidly damage the motor.
»Driving in wet conditions can reduce the life of the motor.
The additional resistance of operating in water causes
excess strain. Alter the gear ratio by using a smaller pinion
or larger spur gear. This will increase torque (and motor life)
when running in mud, deeper puddles, or any wet conditions
that will increase the load on the motor for an extended
period of time.
WET CONDITIONS MAINTENANCE
»Remove the battery pack(s) and dry the contacts. If you have
an air compressor or a can of compressed air, blow out any
water that may be inside the recessed connector housing.
»Remove the tires/wheels from the vehicle and gently rinse
the mud and dirt o with a garden hose. Avoid rinsing the
bearings and transmission.
NOTICE: Never use a pressure washer to clean
your vehicle.
»Use an air compressor or a can of compressed air to dry the
vehicle and help remove any water that may have gotten into
small crevices or corners.
»Spray the bearings, drive train, fasteners and other metal
parts with WD-40® solvent or any other water-displacing
light oil. Do not spray the motor.
»Let the vehicle air dry before you store it.
Water (and oil) may continue to drip for a few hours.
»Increase the frequency of disassembly,
inspection and lubrication of the following:
• Front and rear axle hub assembly bearings.
• All transmission cases, gears and dierentials.
• Motor—clean with an aerosol motor cleaner and
re-oil the bearings with lightweight motor oil.
WATER-RESISTANT VEHICLE WITH WATERPROOF ELECTRONICS / / / / / / / / / / / / / / / / / / / / /
/ / / / / / / / / / / / / / / / / / / / / / / / / / /
Your new Horizon Hobby vehicle
has been designed and built with a
combination of waterproof and water-
resistant components to allow you
to operate the product in many “wet
conditions”, including puddles, creeks,
wet grass, snow and even rain.
While the entire vehicle is highly water-
resistant, it is not completely waterproof
and your vehicle should NOT be treated
like a submarine. The various electronic
components used in the vehicle, such
as the Electronic Speed Control (ESC),
servo(s) and receiver are waterproof,
however, most of the mechanical
components are water-resistant
and should not be submerged.
Metal parts, including the bearings,
hinge pins, screws and nuts, as well as
the contacts in the electrical cables, will
be susceptible to corrosion if additional
maintenance is not performed after
running in wet conditions. To maximize
the long-term performance of your
vehicle and to keep the warranty intact,
the procedures described in the “Wet
Conditions Maintenance” section to fol-
low must be performed regularly if you
choose to run in wet conditions. If you
are not willing to perform the additional
care and maintenance required, then
you should not operate the vehicle
in those conditions.
CAUTION: Failure to exercise caution while using this product and complying with the following precautions could
result in product malfunction and/or void the warranty.

6
INTRODUCTION
Thank you for purchasing the Vaterra™
1/10-scale Twin Hammers™rock racer.
We are confident you will be satisfied
with the performance of this durable
and resilient vehicle. Please read
through the entire manual before
setting up and using your vehicle.
TABLE OF CONTENTS / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / QUICK START / / / / / / / / / / / / / / / / / / / / /
Please read the entire manual to gain a full understanding
of the Twin Hammers vehicle, fine-tuning the setup, and
performing maintenance.
1. Read the safety precautions found in this manual.
2. Charge the battery. Refer to the included charging
warnings and instructions for battery charging
information.
3. Install the AA batteries in the transmitter.
Only use alkaline or rechargeable batteries.
4. Install the fully charged battery in the vehicle.
5. Power ON the transmitter and then the vehicle. Always
power the transmitter ON before the vehicle and power
it OFF after the vehicle has been powered OFF.
6. Check the steering and throttle control directions.
Verify that the servos are moving in the correct
direction.
7. Drive your vehicle.
8. Perform any necessary maintenance.
Introduction
Quick Start
Components
The Vehicle Battery
The Transmitter
Transmitter and Receiver Binding
Control Test
Run Time
Tuning, Adjusting & Maintaining Your Vehicle
Dynamite Li-Po Tazer 12T Waterproof Forward/Reverse ESC
Troubleshooting Guide
Limited Warranty
FCC Statement
Compliance Information for the European Union
Fasteners
Replacement Parts
Optional Parts
6
6
7
8
9
11
11
12
12
13
14
15
17
17
60
62
77

»“L” shaped hex wrench
• 1.5mm, 2mm, 2.5mm
»2-way wrench »4-way wrench
SUPPLIED TOOLS
REQUIRED TOOLS
»Soft bristle cleaning brush
»#0 or #1 Phillips screwdriver
OPTIONAL TOOLS
»Hobby grade knife
»Needle nose pliers
»Side cutting pliers
»Safety goggles
»Soldering iron
»Double-sided tape (VTR70000)
Use only Dynamite tools or other
high-quality tools. Use of inexpensive
tools can cause damage to the small
screws and parts used on this type
of model.
EN
»1/10-Scale Twin Hammers 4WD Rock Racer RTR
»Spektrum™DX3E 2.4GHz DSM®Radio System
»Dynamite®Li-Po Tazer™12T Waterproof Forward/Reverse ESC
»Dynamite 15-Turn Brushed Motor
»Servo
»Dynamite 7.4v 2000mAh 2S 30C Li-Po Battery
»Dynamite 10W Li-Po AC Balance Charger
»4 AA Batteries (for transmitter)
COMPONENTS
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8
B C
D
F
A
E
CHARGING WARNINGS
»Never leave the charger and
battery unattended during use.
»Never attempt to charge dead,
damaged or wet battery packs.
»Never attempt to charge a battery
pack containing dierent types
of batteries.
»Never allow minors to charge
battery packs.
»Never charge batteries in
extremely hot or cold places
or place in direct sunlight.
»Never charge a battery if the cable
has been pinched or shorted.
»Never connect more than one battery
pack to this charger at a time.
»Never connect the charger if the
power cable has been pinched
or shorted.
»Never attempt to dismantle the
charger or use a damaged charger.
»Never reverse the positive and
negative terminals.
»Always use only rechargeable
batteries designed for use with
this type of charger.
»Always inspect the battery
before charging.
»Always keep the battery away from
any material that could be aected
by heat.
»Always monitor the charging area and
have a fire extinguisher available at all
times.
»Always end the charging process if the
battery becomes hot to the touch or
starts to change form (swell) during
the charge process.
»Always disconnect the battery after
charging, and let the charger cool
between charges.
»Always terminate all processes and
contact Horizon Hobby if the product
malfunctions.
For faster charge times, we
recommend a computerized
charger, such as DYN4066.
WARNING: Failure to exercise
caution while using this product and
comply with the following warnings
could result in product malfunction,
electrical issues, excessive heat,
FIRE, and ultimately injury and
property damage.
WARNING: Never leave charger
unattended, exceed maximum charge
rate, charge with non-approved
batteries or charge batteries in the
wrong mode. Failure to comply may
result in excessive heat, fire and
serious injury.
CAUTION: Always ensure the
battery you are charging meets the
specifications of this charger and that
the charger settings are correct. Not
doing so can result in excessive heat
and other related product malfunc-
tions, which can lead to user injury
or property damage. Please contact
Horizon Hobby or an authorized
retailer with compatibility questions.
CHARGING THE BATTERY
ACell 1 LED
BCell 2 LED
CCell 3 LED
DAC Power Slot
E2S Charge Port
F3S Charge Port
1Connect the AC power cord to
the power slot on the charger, then
connect the other end of the power
cord to an AC power source.
2The three LEDs will turn green when
the charger is connected to the AC
power source.
3Connect the balance connector of
the battery to the proper charge port
on the charger (the 3S charge port
has 4 pins and the 2S charge port
has 3 pins).
4The three LEDs will turn red,
indicating the battery is charging.
5When the charging of one cell is
complete, the corresponding LED
turns green.
6Once the battery pack is fully charged,
all three LEDs will turn green.
7Disconnect the battery from
the charger.
8Disconnect the AC power cord
from the AC power source.
THE VEHICLE BATTERY / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / /
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EN
THE VEHICLE BATTERY / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / /
CAUTION: NEVER remove
the transmitter batteries while the
vehicle is powered ON, as loss of
control, property damage or
injury may result.
1Ensure the ESC is powered OFF.
2Loosen the hook and loop straps.
3Install a fully charged battery.
4Tighten the hook and loop straps.
5Power ON the transmitter,
then the vehicle.
THE TRANSMITTER / / / / / / / / / / / / / / /
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INSTALLING THE TRANSMITTER BATTERIES
1Push in the battery cover a small
amount to release the retaining tab,
then remove the cover.
2Install 4 AA batteries, taking care
to align the battery polarity to the
diagram in the transmitter’s
battery case.
3Carefully reinstall the battery cover
by aligning the tabs with the slots
on the transmitter.
CAUTION: If using rechargeable
batteries, charge only rechargeable
batteries. Charging non-rechargeable
batteries may cause the batteries to
burst, resulting in injury to persons
and/or damage to property.
INSTALLING THE VEHICLE BATTERY

10
OFF
ON
3
9
8
1
2
67
10
4
5
11 12 14 15
19
16 17
13
18
SPEKTRUM DX3E RADIO SYSTEM
1Steering Wheel controls direction (left/right) of the model
2Throttle Trigger controls speed and direction
(forward/brake/reverse) of the model
3Antenna transmits the signal to the model
4ON/OFF Switch turns the power ON/OFF for the transmitter
5Ch 3 Switch
6Indicator Lights
• Green(right)light indicates adequate battery power
• Red(left)light indicates good signal strength.
When the red light fades, signal strength is weakening
7ST. Trim adjusts the “hands o” direction of the model
8TH. Trim adjusts the motor speed to stop at neutral
9Steering Rate adjusts the amount the front wheels move when
the steering wheel is turned left and right
10 Battery Cover covers and holds the batteries that power the transmitter
11 BIND Button puts the transmitter into Bind Mode
12 ST. REV reverses the function of the steering when the wheel
is turned left or right
13 TH. REV reverses the function of the speed control when pulled
back or pushed forward
14 TH-F – ForwardEndpoint – Adjusts the amount of full throttle
15 TH-B – BrakeEndpoint – Adjusts the amount of full brake
16 AUX-H – AUXHighEndpoint – Adjusts the amount of high AUX travel
17 AUX-L – AUXLowEndpoint – Adjusts the amount of low AUX travel
18 ST-L – SteeringLeftEndpoint –
Adjusts the amount of left steering travel
19 ST-R – SteeringRightEndpoint –
Adjusts the amount of right steering travel
RF MODE
The DX3E features an RF mode switch on the bottom side of
the transmitter near the trigger. Std is the standard RF mode.
FR is the France RF mode and should only be selected if the
transmitter is used in France.
The Twin Hammers rock racer comes
with a Spektrum™DX3E Transmitter
with 2.4GHz DSMtechnology. The
system will not interfere with radio
systems operating on legacy frequen-
cies, such as 27MHz or 75MHz, neither
will you experience any overlapping in-
terference from other 2.4GHz systems.
The transmitter and receiver are bound
together at the factory to uniquely
operate together.
For more information on the transmit-
ter, go to www.horizonhobby.com
and click on the support tab for the
Spektrum DX3E to download the
instruction manual.
FACTORY SETTINGS
OF RADIO/ESC
The Electronic Speed Control was
calibrated at the factory. When you
turn on and run the vehicle for the first
time, you may need to slightly adjust
the Throttle Trim. If the vehicle creeps
forward or backwards, make a fine
adjustment to the Throttle Trim knob
on the transmitter. Bumps during
transportation can slightly alter
the default settings.
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EN
BINDING PROCEDURE
1Ensure the transmitter and vehicle are both turned o.
2Insert the Bind plug (included) into the receiver slot
labeled BIND.
IMPORTANT: You do not need
to remove any other plugs to rebind.
3Connect a fully charged battery to the EC3™connector
on the ESC.
4With the Bind plug installed, turn on the vehicle.
The receiver LED will start to blink.
5Turn on the transmitter. The transmitter LED will
start to blink.
6After a few seconds, the receiver and transmitter
LEDs will turn solid, indicating they have been bound.
7Turn o the vehicle, then the transmitter.
8Remove the bind plug from the receiver.
9Turn on the transmitter and then the vehicle to ensure
operation. If the transmitter does not control the vehicle,
repeat steps 1–8 above. If after several attempts you are
unsuccessful, please contact Horizon product support.
TRANSMITTER AND RECEIVER BINDING / / / / / / / / / / / / / / /
/ / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / /
CONTROL TEST / / / / / / / / / / / / / / /
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Perform a control test with the vehicle
wheels o the ground. If the wheels
rotate after the vehicle is powered
ON, adjust the “TH. Trim” knob until
they stop. To make the wheels move
forward, pull the trigger. To reverse
them, wait for the wheels to stop,
then push the trigger. When moving
forward, the wheels should maintain
a straight line without any steering
wheel input. If not, adjust the “ST.
Trim” knob so the wheels maintain
a straight line without having to
turn the steering wheel.
Binding is the process of program-
ming the receiver to recognize the
GUID (Globally Unique Identifier) code
of a single specific transmitter. You
need to ‘bind’ your chosen Spektrum™
DSM®technology equipped vehicle
transmitter to the receiver for proper
operation. The DX3E transmitter and
SR300WP receiver are pre-bound
at the factory. If you need to rebind,
follow these instructions.
RECEIVER ANTENNA
Using your fingers, gently straighten
the antenna wire to be close to
vertical from the chassis for
the best radio reception.
NOTICE: Do not cut or bend the
receiver antenna or damage to the
receiver may result.
BRAKE/REVERSE
FORWARD

12
If the bearings are dirty, they will cause significant
drag, causing reduced run times and speed.
To improve run times, consider the following:
»Keep your vehicle clean and maintained.
»Allow more airflow to the heat sink of the ESC.
»Change the gearing to a lower ratio; this will make the
electronics run cooler. To change gear ratio, use a smaller
pinion gear or a larger spur gear than those originally
supplied (the Twin Hammers vehicle comes with
a 28-tooth pinion and a 78-tooth spur gear).
»Change to battery packs of higher mAh rating.
»Verify you are using the best charger for your batteries.
See your local hobby dealer for a wide selection of
compatible chargers.
2-SPEED TRANSMISSION
Your Twin Hammers trail racer features a 2-speed
transmission, giving you the option for fast driving or rock
crawling all in one vehicle. To change between speeds:
1. Press the top of the Channel 3 switch for low speed driving.
2. Press the bottom of the Channel 3 switch for high
speed driving.
IMPORTANT: If you decide to use a transmitter other
than the one included with the vehicle, limit the Channel
3 travel end points and gradually increase the travel until
the vehicle shifts. Failure to limit the travel endpoints will
damage the transmission servo.
RUN TIME / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / /
TUNING, ADJUSTING & MAINTAINING YOUR VEHICLE / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / /
After you become familiar with driving
your vehicle, you may need to reset or
make adjustments to the alignment.
Make sure to work on a flat work space.
This will enable you to easily and more
quickly make both Toe-in and Cam-
ber adjustments. These adjustments
should be set with the vehicle sitting
at its normal ride height.
»Keep your vehicle clean by using a soft brush to remove
dirt and dust.
»Look for cracks in the suspension arms and other
molded parts.
»Check the beadlock wheel hardware.
»Check that all the wheel bearings are clean and lubricated.
»Using your tools, attempt to tighten all the screws and nuts.
»Verify that the Camber Links and Steering Linkage are
not bent.
»Check that the Toe and Camber settings are as desired
and equal.
»Remove the gear cover.
• Check the Spur gear for wear.
• Check the Pinion gear.
• Check the Slipper Pads for wear.
»Take the shocks o the vehicle and check them for leakage.
It may be time to rebuild them.
»Look over all the wiring and connections for bare
wire or any place that could lead to a short-circuit.
»Verify the ESC is securely mounted to the chassis.
»Verify the receiver is still securely mounted to the chassis.
»Turn on the radio. If the Green LED is o or dim, replace
the 4 AA batteries in the transmitter.
The single largest factor in run time is
the mAh capacity of your battery pack.
The larger the mAh rating, the more run
time you will experience. For example: if
you have a 4600mAh battery pack, you
can expect close to twice the run time
of a 2000mAh battery pack.
The condition of a battery pack is also
an important factor in both run time
and speed. The longer you run, the
hotter the battery plugs can get. Check
the standard plugs periodically. As bat-
teries see more use, they will degrade
in performance and capacity.
How you drive your Twin Hammers
vehicle also aects your run times. If
you are performing runs, going from a
standstill to full speed repeatedly, you
are taxing your batteries and electron-
ics. Hard acceleration draws a lot of
current from any battery and will
lead to shortened run time.

EN
DYNAMITE LI-PO TAZER 12T WATERPROOF FORWARD/REVERSE ESC
/ / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / /
SPECIFICATIONS
Operation Forward/Reverse with
Smart Brake, Forward Only
with Brake, Crawler Mode
Input Voltage 4- to 7-cell
(4.8–8.4 volts) DC
Peak Current 380A
Continuous Current 38A
Full-On Resistance 0.0028 Ohms
Frequency 1 kHz
BEC output 5.6 V DC, 1 amp max.
Motor Limit 12T
Overload Protection Thermal, Stall,
Over-Voltage
Dimensions 1.57 in x 1.57 in x 1.06 in
(46mm x 37mm x 28mm)
Weight 2.70 oz (76 g)
CONNECTING THE BATTERY
The Tazer 12T comes pre-wired with
an EC3 connector and is compatible
with most battery packs. Only use 4-cell
(4.8 volt) to 7-cell (8.4 volt) sub-C size
battery packs.
1Ensure the on/o switch is in the
OFF position.
2Connect a fully charged battery
pack to the ESC battery connector
ADJUSTING THE TRANSMITTER
Refer to your transmitter’s instructions
for specific information on transmitter
setup.
1Set the Throttle Reversing switch
to the NORMAL position. (This may
need to be reversed on some
brands of radios).
WARNING: This product can
become extremely hot when in use,
which could lead to burns.
FEATURES
»Li-Po, Ni-MH/Ni-Cd compatible
»3 user selectable modes—
Forward/reverse, Forward-only
race, and Crawler
»High-power FET control with
proportional forward and reverse
»High frequency design delivers
smooth speed transition
»Thermal Overload Protection
prevents damage due to over-
current conditions
»Pre-wired with EC3™battery plug
and bullet-style motor connectors
»Designed to operate with stock
motors (12 turns or higher)
»Waterproof
2Set the Throttle Trim to the
CENTER position.
3Set the Throttle Exponential
to MINIMUM or ZERO.
4Set the ATV to 100%.
5If your transmitter has an adjustable
trigger (or stick) position, move it to
the 70/30 position.
FACTORY DEFAULT SETTINGS
Battery Chemistry Type - Li-Po
ESC Running Mode - Forward/Reverse
withSmartBrake
TRANSMITTER CONTROLLED
PROGRAMMING
1Power on the transmitter and set the
transmitter’s throttle endpoint travel
to maximum and the throttle trim
to the center position.
2Hold the throttle trigger at the
maximum forward position,
then power on the ESC.
3Continue holding the throttle trigger
at the maximum forward position
until a beep sounds and both red and
green LEDs flash, then release the
throttle to neutralposition.
4The ESC is now in programming
mode. The ESC will cycle through its
programmable features in this order:
a Green Change Battery Chemis-
LED only try Type: Ni-MH or Li-Po
b Red Transmitter/ESC
LED only Endpoint Calibration
c Red +Change ESC Running
Green Mode: Forward/Reverse
LED with Smart Brake or
Forward Only with Brake
or Crawler Mode
5Move the throttle trigger to maximum
forward position and back to neutral
position at A, B or C in order to execute
the setting task.
a Change Battery Chemistry Type:
Ni-MH or Li-Po
• The respective LED will indicate the
current battery type for 4 seconds:
-SolidGreenLED Ni-MH
-SolidRedLED Li-Po
• Move the throttle trigger to full
throttle and return to neutral within
the 4 seconds. A beep will sound and
the respective LED will indicate the
updated battery type.
• To change back to the previous
battery type, repeat the step above
within 4 seconds of the beep.
• Both the red and green LEDs
will flash 3 times with 3 beeps.
• Power OFF the ESC and then power ON
the ESC to return to normal operation.
b Transmitter/ESC Enpoint Calibration
• After executing the setting task, the
green LED will flash as you release
the throttle trigger to neutral. Once
neutral is reached, a beep will sound
and the green LED will glow solid for
1 second. The red LED will begin
to flash.
• Move the throttle trigger to full throttle
and hold it until a beep sounds and
the red LED glows solid for 1 second.
Release the throttle trigger to neutral
and the red LED will glow solid while
the green LED will begin to flash.
• Move the throttle trigger to full brake
/reverse and hold until a beep sounds
and the green LED glows solid.
• Release the throttle trigger to neutral.
Both red and green LEDs will flash 3
times with 3 beeps.

14
TROUBLESHOOTING GUIDE / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / /
PROBLEM POSSIBLE CAUSE SOLUTION
Vehicle does
not operate »Battery not charged or connected
»ESC switch not ON
»Transmitter not ON or low battery
»Charge battery/connect
»Turn ON ESC switch
»Turn ON/replace batteries
Motor runs but rear
wheels don’t move »Pinion not meshing with spur gear
»Pinion spinning on motor shaft
»Slipper too loose
»Transmission gears stripped
»Drive pin broken
»Adjust pinion/spur mesh
»Replace pinion gear on motor
»Check and adjust slipper
»Replace transmission gears
»Check and replace drive pin
Steering does
not work »Servo plug not in receiver properly
»Servo gears or motor damaged
»Check if connected/all the way
»Replace or repair servo
Many questions are the result of
simple user errors or minor adjust-
ments that are easily addressed. If
after reading below you cannot resolve
your problem, contact the appropriate
Horizon product support center.
• Power OFF the ESC and then power ON the ESC to return to normal operation.
OPERATION LED STATUS
waiting for throttle position position set
Neutral Flashing Green Solid Green (1 second)
Forward Flashing Red Solid Red (1 second)
Full Brake/Reverse Solid Red /Flashing Green Solid Green (1 second) followed by Red and Green flashing 3x
c Change ESC Running Mode: Forward/
Reverse with Smart Brake Forward
Only with Brake or Crawler Mode
• The green LED will indicate the
currently selected ESC running
mode for 4 seconds:
-Green Forward/Reverse
LEDSolid with Smart Brake
-GreenLED Forward Only
Flashing with Brake
-Red+Green
LEDSolid Crawler Mode*
• Move the throttle trigger to full throttle
within the 4 seconds to select the next
ESC mode. A beep will sound and the
green LED will indicate the new ESC
running mode.
• To select the next mode, repeat the
step above within 4 seconds of the
beep.
• Both red and green LEDs will flash
3 times with 3 beeps.
• Power OFF the ESC and then power on
the ESC to return to normal operation
• At any time that the ESC is powered
and the transmitter is at neutral, the
green LED will indicate the current
running mode:
-Green Forward/Reverse
LEDSolid with Smart Brake
-GreenLED Forward Only
Flashing with Brake
-Red+Green
LEDSolid Crawler Mode*
*NOTICE: Crawler mode is for
use on rocky surfaces only. Do not
use this mode with your 1/10-scale
Twin Hammers vehicle on any other
surface, especially pavement.
Doing so may damage the vehicle.
SMART BRAKE
When the throttle is changed from
Forward to Reverse or Reverse to
Forward, the ESC will brake instead
of reversing the motor immediately.
The ESC will remain in brake mode
unless the throttle is returned to the
neutral/stop position for a short time.
/ / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / /

EN
LIMITED WARRANTY
/ / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / /
WHAT THIS WARRANTY COVERS
Horizon Hobby, Inc. (“Horizon”) warrants to the original
purchaser that the product purchased (the “Product”)
will be free from defects in materials and workmanship
at the date of purchase.
WHAT IS NOT COVERED
This warranty is not transferable and does not cover (i)
cosmetic damage, (ii) damage due to acts of God, acci-
dent, misuse, abuse, negligence, commercial use, or due
to improper use, installation, operation or maintenance,
(iii) modification of or to any part of the Product, (iv) at-
tempted service by anyone other than a Horizon Hobby
authorized service center, (v) Product not purchased
from an authorized Horizon dealer, or (vi) Product not
compliant with applicable technical regulations.
OTHER THAN THE EXPRESS WARRANTY ABOVE, HORI-
ZON MAKES NO OTHER WARRANTY OR REPRESENTA-
TION, AND HEREBY DISCLAIMS ANY AND ALL IMPLIED
WARRANTIES, INCLUDING, WITHOUT LIMITATION,
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT,
MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE PURCHASER ACKNOWLEDGES THAT
THEY ALONE HAVE DETERMINED THAT THE PRODUCT
WILL SUITABLY MEET THE REQUIREMENTS OF THE
PURCHASER’S INTENDED USE.
PURCHASER’S REMEDY
Horizon’s sole obligation and purchaser’s sole and
exclusive remedy shall be that Horizon will, at its option,
either (i) service, or (ii) replace, any Product determined
by Horizon to be defective. Horizon reserves the right
to inspect any and all Product(s) involved in a warranty
claim. Service or replacement decisions are at the sole
discretion of Horizon. Proof of purchase is required for
all warranty claims.
SERVICE OR REPLACEMENT AS PROVIDED UNDER
THIS WARRANTY IS THE PURCHASER’S SOLE AND
EXCLUSIVE REMEDY.
PROBLEM POSSIBLE CAUSE SOLUTION
Won’t turn in
one direction »Servo gears damaged »Replace servo
Motor does not run »Motor plugs loose
»Motor wire broken
»ESC damaged
»Plug in completely
»Repair or replace as needed
»Contact Horizon Hobby Product Support
ESC gets hot »Motor over-geared
»Driveline bound up
»Use smaller pinion or larger spur gear on motor
»Check wheels, suspension and transmission for binding
Poor run time and/or
sluggish acceleration »Ni-MH pack not fully charged
»Charger not allowing full charge
»Slipper slipping too much
»Motor worn out
»Driveline bound up
»Recharge battery
»Try another charger
»Check/adjust slipper
»Replace motor
»Check wheels, transmission for binding
Poor range
and/or glitching »Transmitter batteries low
»Vehicle battery low
»Loose plugs or wires
»Check and replace
»Recharge or replace
»Check all wire connections and plugs
Slipper won’t adjust »Spur gear face worn out »Replace spur gear and adjust slipper
/ / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / /

16
CONTACT INFORMATION
COUNTRY OF
PURCHASE
HORIZON HOBBY ADDRESS PHONE NUMBER / EMAIL ADDRESS
United States
of America
Horizon Service Center
(Electronics and engines)
4105 Fieldstone Rd
Champaign, Illinois
61822 USA
877-504-0233
[e-mail]
Horizon Product Support
United
Kingdom
Horizon Hobby Limited Units 1-4 Ployters Rd
Staple Tye, Harlow, Essex
CM18 7NS
United Kingdom
[phone]
[e-mail]
Germany Horizon Technischer
Service
Christian-Junge-Straße 1
25337 Elmshorn
[phone]
[e-mail]
France Horizon Hobby SAS 11 Rue Georges Charpak
77127 Lieusaint
[phone]
China Horizon Hobby - China Room 506
No. 97 Changshou Rd.
Shanghai, China 200060
[phone]
[e-mail]
LIMITATION OF LIABILITY
HORIZON SHALL NOT BE LIABLE FOR SPECIAL, INDI-
RECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES,
LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL
LOSS IN ANY WAY, REGARDLESS OF WHETHER SUCH
CLAIM IS BASED IN CONTRACT, WARRANTY, TORT, NEG-
LIGENCE, STRICT LIABILITY OR ANY OTHER THEORY OF
LIABILITY, EVEN IF HORIZON HAS BEEN ADVISED OF
THE POSSIBILITY OF SUCH DAMAGES. Further, in no
event shall the liability of Horizon exceed the individual
price of the Product on which liability is asserted. As
Horizon has no control over use, setup, final assembly,
modification or misuse, no liability shall be assumed nor
accepted for any resulting damage or injury. By the act
of use, setup or assembly, the user accepts all resulting
liability. If you as the purchaser or user are not prepared
to accept the liability associated with the use of the
Product, purchaser is advised to return the Product im-
mediately in new and unused condition to the place
of purchase.
LAW
These terms are governed by Illinois law (without regard
to conflict of law principals). This warranty gives you
specific legal rights, and you may also have other rights
which vary from state to state. Horizon reserves the
right to change or modify this warranty at any time
without notice.
WARRANTY SERVICES
QUESTIONS, ASSISTANCE, AND REPAIRS
Your local hobby store and/or place of purchase cannot
provide warranty support or service. Once assembly,
setup or use of the Product has been started, you must
contact your local distributor or Horizon directly. This
will enable Horizon to better answer your questions
and service you in the event that you may need any
assistance. For questions or assistance, please visit our
website at www.horizonhobby.com, submit a Product
Support Inquiry, or call 877.504.0233 toll free to speak
to a Product Support representative.
INSPECTION OR SERVICES
If this Product needs to be inspected or serviced and is
compliant in the country you live and use the Product in,
please use the Horizon Online Service Request submis-
sion process found on our website or call Horizon to
obtain a Return Merchandise Authorization (RMA) num-
ber. Pack the Product securely using a shipping carton.
Please note that original boxes may be included, but are
not designed to withstand the rigors of shipping without
additional protection. Ship via a carrier that provides
tracking and insurance for lost or damaged parcels,
as Horizon is not responsible for merchandise until it
arrives and is accepted at our facility. An Online Service
Request is available at http://www.horizonhobby.com/
content/_service-center_render-service-center. If you
do not have internet access, please contact Horizon
Product Support to obtain a RMA number along with in-
structions for submitting your product for service. When
calling Horizon, you will be asked to provide your com-
plete name, street address, email address and phone
number where you can be reached during business
hours. When sending product into Horizon, please in-
clude your RMA number, a list of the included items, and
a brief summary of the problem. A copy of your original
sales receipt must be included for warranty consider-
ation. Be sure your name, address, and RMA number are
clearly written on the outside of the shipping carton.
NOTICE: Do not ship Li-Po batteries to Horizon.
If you have any issue with a Li-Po battery,
please contact the appropriate Horizon
Product Support oce.
WARRANTY REQUIREMENTS
For Warranty consideration, you must include
your original sales receipt verifying the proof-of-
purchase date. Provided warranty conditions have
been met, your Product will be serviced or replaced free
of charge. Service or replacement decisions are at the
sole discretion of Horizon.
/ / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / /

EN
/ / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / /
DECLARATION OF CONFORMITY
(in accordance with ISO/IEC 17050-1)
No. HH2012101102
Product(s): VTR Twin Hammers 1.9 Rock Racer RTR 1/10th Scale
Item Number(s): VTR03000I
Equipment class: 2
The object of declaration described above is in conformity with the requirements
of the specifications listed below, following the provisions of the European R&TTE
directive 1999/5/EC, EMC Directive 2004/108/EC and LVD Directive 2006/95/EC:
EN 300-328 V1.7.1: 2006
EN 301 489-1 V1.7.1: 2006
EN 301 489-17 V1.3.2: 2008
EN 60950-1:2006+A12: 2011
EN55022: 2010
EN55024: 2010
EN61000-3-2:2006+A1:2009+A2:2009
EN61000-3-3:2008
Signed for and on behalf of:
Horizon Hobby, Inc.
Champaign, IL USA
October 11, 2012
COMPLIANCE INFORMATION FOR THE EUROPEAN UNION
/ / / / / /
Steven A. Hall
Executive Vice President and Chief Operating Ocer
International Operations and Risk Management
Horizon Hobby, Inc.
INSTRUCTIONS FOR DISPOSAL OF
WEEE BY USERS IN THE EUROPEAN UNION
This product must not be disposed of with other waste. Instead, it is the user’s
responsibility to dispose of their waste equipment by handing it over to a designated
collection point for the recycling of waste electrical and electronic equipment. The
separate collection and recycling of your waste equipment at the time of disposal
will help to conserve natural resources and ensure that it is recycled in a manner that
protects human health and the environment. For more information about where you
can drop o your waste equipment for recycling, please contact your local city oce,
your household waste disposal service or where you purchased the product.
FCC STATEMENT / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / /
ANTENNA SEPARATION DISTANCE
When operating your Spektrum
transmitter, please be sure to maintain
a separation distance of at least 5 cm
between your body (excluding fingers,
hands, wrists, ankles and feet) and the
antenna to meet RF exposure safety
requirements as determined by
FCC regulations.
The following illustrations show the
approximate 5 cm RF exposure area
and typical hand placement when
operating your Spektrum transmitter.
This device complies with part 15 of the
FCC rules. Operation is subject to the
following two conditions: (1) This device
may not cause harmful interference, and
(2) this device must accept any interfer-
ence received, including interference
that may cause undesired operation.
CAUTION: Changes or modifi-
cations not expressly approved by
the party responsible for compliance
could void the user’s authority to
operate the equipment.
This product contains a radio
transmitter with wireless technology
which has been tested and found to
be compliant with the applicable
regulations governing a radio
transmitter in the 2.400GHz to
2.4835GHz frequency range.
NON-WARRANTY REPAIRS
Should your service not be covered by
warranty, service will be completed
and payment will be required with-
out notification or estimate of the
expense unless the expense exceeds
50% of the retail purchase cost. By
submitting the item for service you are
agreeing to payment of the service with-
out notification. Service estimates are
available upon request. You must include
this request with your item submitted for
service. Non-warranty service estimates
will be billed a minimum of 1/2 hour of
labor. In addition you will be billed for
return freight. Horizon accepts money
orders and cashier’s checks, as well as
Visa, MasterCard, American Express, and
Discover cards. By submitting any item
to Horizon for service, you are agreeing
to Horizon’s Terms and Conditions found
on our website http://www.horizonhobby.
com/content/_service-center_render-
service-center.
NOTICE: Horizon service is lim-
ited to Product compliant in the
country of use and ownership. If
non-compliant product is received
by Horizon for service, it will be
returned unserviced at the sole
expense of the purchaser.