Duratrax 835E User Manual

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137 Front

138 Rear

170

140

159

TABLE OF CONTENTS

CONTENTS

REQUIRES

Chassis

(Battery not included)

Transmitter

Antenna

Tube

Duratrax Onyx 235

AC/DC Charger w/Balancing

(DTXP4235)

“AA” Alkaline Batteries x4

(Transmitter)

TrakPower LiPo 4S 14.8V 5600mAh 60C Battery

(TKPC20450)

SAFETY PRECAUTIONS AND WARRANTY ...............3 TUNING GUIDE ........................................................8

PREPARE TO RUN THE 835E ...................................4

ASSEMBLY GUIDE .................................................11

ESC SETUP ..............................................................6 REPLACEMENT PARTS ..........................................36

SPECIFICATIONS & DESCRIPTION CHANGES

All information found in this manual is subject to change without notice. Visit Duratrax.com for the latest updates and information on your model. Duratrax maintains no responsibility for inadvertent errors in this manual.

SAFETY PRECAUTIONS

To prevent injury and damage to property, follow these safety precautions when operating any radio control vehicle.

Keep all spectators a safe distance away from the vehicle. ALWAYS turn the transmitter on before the receiver. ALWAYS disconnect the battery from the ESC when ﬁ nished running. Use a mat or towel when working on your model to protect your work surface. Do NOT run your radio control vehicle in cold weather as plastic parts may become brittle.

LIMITED WARRANTY

Duratrax guarantees this kit to be free from defects in materials or workmanship for 90 days after the date of purchase. Duratrax will repair or replace at no charge any incorrectly made part.

Your receipt or invoice at time of purchase is your proof of purchase and is required for Duratrax to honor any warranty. Duratrax reserves the right to change or modify this warranty without notice.

For warranty repairs, contact or send to:

Hobby Services

3002 N. Apollo Drive Suite 1

Champaign, IL 61822

ATTN: Service Department

Phone: (217) 398-0007 9:00 am – 5:00 pm Central Time M-F E-mail: hobbyservices@hobbico.com

www.hobbyservices.com

If the buyer is not prepared to accept the liability associated with the use of this product, the buyer is advised to return the kit immediately in new and unused condition to the place of purchase.

STRESS-TECH PARTS GUARANTEE

Stress-Tech parts are guaranteed for 12 months from the date of purchase. Check the parts list for items covered under the Stress-Tech guarantee. Should a Stress-Tech part break during the ﬁ rst 12 months after purchase, return the part to Hobby Services and we will send you a FREE replacement.

To receive your FREE replacement Stress-Tech part, include the following and return to Hobby Services at the address above:

1. Broken part

2. Part number and description of the broken part

3. COPY of your dated purchase invoice or receipt

4. Name, phone number and shipping address

REPAIR SERVICE

Hobby Services offers repair services after the 90 day limited warranty or 12 month Stress-Tech parts replacement for a minimal charge.

Follow these instructions for your repair request:

Most circumstances require the return of the ENTIRE vehicle. STRESS-TECH requires ONLY the broken part to be returned following the instructions above.

2. Turn off the transmitter and remove the batteries.

3. Disconnect battery from ESC.

4. Include written instructions listing

ALL

items being returned with a

THOROUGH

description of the problem, service needed and your

DAYTIME

phone number. IF you expect the repair to be covered under the 90 day limited warranty, include copy of receipt or invoice with date of purchase.

5. Send to Hobby Services at the address above. When shipping your item(s) to us, we recommend that you insure them and use a company that offers tracking service (such as UPS or Federal Express).

We will carefully inspect your item and notify you of our ﬁ ndings. You will be advised of your options for return, repair, or replacement. Please note that items sent back unrepaired will carry a return shipping and service charge.

Hobby Services accepts Visa®, MasterCard®, or you can send a check. We can return the item C.O.D., but additional charges will apply.

3S 4S

CHARGER

4S LIPO BATTERY

–

BIND

ST-D/RTH-TRIMST-TRIM

Throttle Reversing Switch

Steering Reversing Switch

Steering

Trim

Throttle

Trim

Steering Dual Rate

Forward

Reverse

Forward

CHARGE THE LIPO BATTERY

INSTALL TRANSMITTER BATTERIES

INSTALL RECEIVER ANTENNA TUBE

FAILSAFE INSTALL/CONNECT LIPO

BATTERY TO ESC

CHECK TRANSMITTER

Note: Never leave a charging battery unattended! If the battery swells or becomes hot, disconnect immediately!

Note: ALWAYS turn on your transmitter then your ESC. When ﬁ nished ALWAYS turn off your ESC then your transmitter.

Charge your battery per the manufacturer’s speciﬁ cations.

Install (4) AA batteries.

Important: When not in use, disconnect your battery from the ESC.

Route the antenna.

To set:

1. Power up the transmitter and receiver.

2. Hold the buggy so the wheels are off the ground and clear of all objects.

3. With the transmitter throttle in neutral, press the failsafe set button on the receiver. The receiver LED will ﬂ ash to indicate

a new failsafe point has been set.

The R240FS receiver has a build in failsafe. If the receiver loses contact with the transmitter, it will automatically return the throttle to a preset point.

Failsafe Set Button

BIND

ST-D/RTH-TRIMST-TRIM

RE-BINDING THE TRANSMITTER TO THE RECEIVER

Your radio system is preset at the factory. If you need to re-bind your system, follow these steps.

1. Insert the bind plug into channel 3 on the receiver.

2. Turn on the ESC. The receiver LED should start blinking.

Receiver LED

Bind Plug

Transmitter Bind Button

ESC LED

3. Press and hold down the transmitter’s bind button and turn the transmitter on. The receiver LED will stop blinking.

4. Turn off the ESC and transmitter and remove the bind plug from the receiver.

ESC INSTRUCTIONS

SPECIAL FEATURES:

●

Completely waterproof and dustproof.

●

Excellent start-up, acceleration and linearity features, suitable for

buggies, trucks and short course vehicles.

●

Multiple protection modes: low voltage cut-off, thermal, throttle

signal loss and motor blocked protections.

●

Powerful 6V/3A BEC.

●

Easy manual programming through the SET button located on the switch

and also compatible with the Onyx Programming Card (DTXM1352).

●

Special programming port for connecting to Programming Card

eliminates the need to remove the receiver lead.

THROTTLE CALIBRATION:

Warning:

Prior to throttle calibration, be sure that all trims

and sub-trims are at zero. Failure to do so could result in

improper calibration.

1. Turn the transmitter on and set its throttle and brake EPA (End Point

Adjustment) to maximum.

2. Hold the SET button located on the ESC power switch and turn the ESC

on. Release the SET button as soon as the red LED ﬂ ashes on the ESC and

the motor beeps.

3. With the red LED ﬂ ashing, ensure that the Tx throttle is at neutral and all

trims and sub-trims are at zero. After conﬁ rmation, press the SET button.

The ESC will conﬁ rm the neutral setting has been completed by beeping

one time and ﬂ ashing the green LED once.

4. Move the trigger to the full throttle position and press the SET button.

The green LED will ﬂ ash two times and the motor will beep twice to

conﬁ rm that the setting has been made.

5. Push the trigger to the full brake position and press the SET button.

The green LED will ﬂ ash three times and the motor will beep three times

to conﬁ rm that the setting has been made. The trigger may be released

to neutral at this time. A second group of ﬂ ashes by the green LED will

conﬁ rm that throttle calibration has been completed properly and the ESC

is ready for use.

LED indication in Normal Running mode:

A. Neutral – No LED indication.

B. Forward or Reverse – Indicated by a red LED.

C. Full Throttle – Indicated by green and red LED.

PROGRAMMABLE SETTINGS:

Running Mode:

In “Forward with Brake” the car can go forward and brake,

but will not run in reverse. This setting is mainly used for competition

where reverse should be disabled. “Forward/Reverse with Brake” mode

provides reverse, which is suitable for practice or everyday driving.

Note:

“Forward/Reverse with Brake” mode uses a double brake

input to enable reverse. This means that in order to activate reverse,

the throttle trigger must be pushed forward twice before reverse

is enabled. The ﬁ rst push will activate the brake. The second push

will enable reverse.

“Forward/Reverse” mode is forward and reverse only. The car will go to

reverse immediately once the trigger is pushed to the full brake position.

Drag Brake:

Sets the amount of brake applied at neutral throttle to

simulate the slight braking effect at the neutral position.

Low Voltage Cut-off:

Prevents the lithium battery pack from over

discharging. The ESC monitors the battery’s voltage at all times. If the

voltage is lower than the threshold for 2 seconds, the output power will be

cut off, and the red LED will ﬂ ash twice in sets of three.

Start Mode (also referred to as “Punch”):

Select from “Level 1” to

“Level 9”. Level 1 has a very soft start effect, while Level 9 has a very

aggressive start effect.

Note:

To use Level 7 through 9, you must use a good quality

battery pack with a powerful discharge ability. Otherwise these

modes cannot get the burst start effect as you want. If the motor

cannot run smoothly (the motor is stuttering), it may be the weak

discharge ability of the battery pack. Choose a better battery pack

or reduce the gear ratio.

Maximum Brake Force:

The ESC provides proportional brake function.

The brake force is related to the position of the throttle trigger. Maximum

brake force refers to the force when the throttle is located at the end point

of the backward zone. A very large brake force can shorten the brake time,

but it may damage the gears. The “disable” option inhibits the inherent

brake function of the speed controller. When this option is selected, the

brake function is realized by a traditional mechanical disc-brake system

driven by a servo.

Maximum Reverse Force:

Sets how much power will be applied in the

reverse direction. Different value makes different reverse speed.

Initial Brake Force:

It is also called “minimum brake force” and refers to

the force when the throttle is located at the initial position of the brake.

The default value is equal to the drag brake setting so the brake effect can

be very smooth.

Throttle Neutral Range:

The amount of travel in the trigger between

neutral and brake, and between neutral and throttle.

Timing:

0° of advance is the lowest setting resulting in more torque, less

RPM, least motor heat, but longest run times. Turning the timing up to the

highest setting will do just the opposite.

Thermal Protection:

Protects the ESC from damage occurring by

excessive heat.

Motor Rotation:

Changes the direction that the motor turns.

LiPo Cells:

Must be set to correspond to the number of LiPo cells being

used in application. If you are using a discharged 4S battery, the ESC may

mistakenly measure it as a fully charged 3S battery and then the LVC

protection function will be incorrect. Always be sure to use a fully charged

LiPo when using the “Auto Calculate” setting.

Note:

To reset all programming to its default value, hold the SET button for

3 seconds while the trigger is at neutral. The red and green LEDs will ﬂ ash

at the same time conﬁ rming the settings have been changed to default.

SPECIFICATIONS:

Motor:

kV: 2200

Input Voltage: 3-4S

Connectors: 4mm Male Bullet

Pole: 4

Shaft Diameter: 5mm

Dimension: 39.8mm x 73.8mm

Weight: 374g

ESC:

Cont./Burst Current: 120A / 760A

Motor Type: Sensorless Brushless

Motor Limit: 2S LiPo – kV

Motor Limit: 2S LiPo – kV 

6000

3S LiPo – kV

3S LiPo – kV 

4000

4S LiPo – kV

4S LiPo – kV 

3000

Resistance: 0.0004



Battery: 2-4S LiPo

BEC Output: 6V/3A (Switching

mode built in BEC)

Dimension: 59.3 x 38.4 x 33.6mm

Weight: 110g (w/ﬁ ve 12AWG

200mm wires

PROGRAMMING THE ESC:

Programming of the ESC involves LED ﬂ ashes and matching audible tones. Each LED indication and audible tone will represent a different

adjustable feature.

Below is a chart of programmable values that each setting can be changed with audible and LED indications for each feature. A “—” will

represent a long beep and ﬂ ash, where a “•” will represent a short beep and ﬂ ash.

To program the ESC:

1. Turn on the transmitter.

2. Press and hold the SET button on the

ESC and apply power. The red LED will ﬂ ash

repeatedly for a few seconds. Continue to hold

the SET button until the green LED starts to

ﬂ ash in a pattern according to the INDICATION

column in the chart.

3. Release the SET button once the given

indication matches the feature to be adjusted.

Example: Releasing the SET button when the

green LED and beep is long (—) will enter the

“Maximum Brake Force” feature.

4. Once the feature to be changed is entered,

press the SET button to achieve the desired

setting. The red LED will conﬁ rm the chosen

setting after pressing the SET button.

5. Turn the ESC off when completed.

6. If you wish to change another feature,

repeat the above steps.

NOTE: The power to the ESC must be reset each time a feature is adjusted.

TROUBLESHOOTING:

When the ESC is turned on, the LED and

audible indications do not match that of

the connected LiPo battery:

Battery is not

fully charged and the ESC is recognizing it

differently. Also, check that the “LiPo” cells

feature setting is correct.

Red LED ﬂ ashes twice, in sets of three:

ESC

has reached low voltage cut-off. Disconnect

battery and recharge.

OPTIONAL:

The optional hand-held Programming Card

simpliﬁ es programming and allows for quick

parameter adjustments. DTXM1352

Forward w/Brake

Fwd/Rev w/Brake

Forward

& Reverse

0% 5% 10% 40%20% 60% 100%80%

3.2V/Cell3.0V/Cell 3.4V/Cell

Level1 Level2 Level3 Level5Level4 Level6 Level8Level7 Level9

25% 50% 75% Disable100%

25% 50% 75% 100%

=Drag Brake

Force

0% 20% 40%

6% (Narrow) 9% (Normal) 12% (Wide)

Counter

Clockwise

Auto Calculate 2 Cells 3 Cells 4 Cells

0.00° 3.75° 7.50° 15.00°

Default settings

11.25° 18.75° 26.25°22.50°

Enable Disable

Running Mode

FEATURE

INDICATION

GREEN

LED

SETTINGS (RED LED)

Drag Brake Force

Low Voltage Cut-Off Threshold

Timing (only for sensorless motors)

Start Mode (Punch)

Max Brake Force

Max Rev Force

Initial Brake Force

Neutral Range

Motor Rotation

Heat Protection

LiPo Cells

23 5468791

Short (•) Long (—)

Turn on Tx,

Hold ESC SET Button

END Turn ESC switch off

Turn on ESC

Red LED flashes 10 seconds,

then green LED flashes once

Find “running Mode” lisiting

on chart next to “s”

Change

the SETTING

for this

feature?

Release SET button,

then press SET again

Red LED flashes indicate

SETTING for this feature

See Chart

Press SET the appropriate

number of times to reach

desired setting per chart

Change

the SETTING

for this

feature?

Keep holding

SET button

2 3 4 5 6 7 8

9 10 11 12

Green LED flashes to next

increment for next FEATURE:

Drag Brake Force Low Voltage Cutoff Start Mode (Punch) Max. Brake Force Max. Reverse Force Initial Brake Force Neutral Width Timing Thermal Protection Motor rotation LiPo Cells

Programming the ESC with the SET button on the ESC.

YES

TUNING GUIDE

As a starting point, make sure your car has equal lengths on shocks, camber links and steering rods on both sides (left and right).

Front and rear do not need to be equal.

ACKERMAN

The difference in turning angle between the inside wheel and outside wheel in a turn.

Rear Hole:

Rear Hole: Less initial steering into a corner. Smoother steering

response. Better for large ﬂ owing tracks.

Forward Hole:

Forward Hole: More initial steering into corner. Steering is

more aggressive. Better for tight technical tracks.

CAMBER

Angle of the tire and wheel in relation to the ground when viewed from the front.

Negative Camber

Negative Camber =

Top of the tire and wheel lean inward (Typically 0° to -2°)

• Improved traction while corning.

• Adds overall stability.

Positive Camber

Positive Camber = Tire and wheel lean outward (NOT recommended).

FRONT TOE-IN AND TOE-OUT

Direction the wheels point in relationship with each other, when viewed from the front.

Toe-Out:

Toe-Out: Fronts of the wheels point away from each other.

• Decreased stability when accelerating and increased steering when entering a corner.

Toe-In:

Toe-In: Front of the

wheels point toward each other. (Typically 0 to -2°)

• Increased stability when accelerating. Decreased steering when entering a corner.

Toe-In

Rotate the collar on the shock to change ride height. Adjust left and right equally.

RIDE HEIGHT

Distance the chassis sits from the ground and how much weight is transferred when the vehicle changes speed and direction.

Lower Rear:

More rear traction but reduces steering.

Lower Front:

Increases steering but can

cause rear end to lose traction.

SHOCK ADJUSTMENTS

DROOP

Distance the chassis can lift from ride height before the wheels come off the ground.

More Front Droop:

Increases chassis up travel when on throttle and decreases high speed steering,

making vehicle turn smoother. Good for low traction and bumpy surfaces.

Less Front Droop:

Decreases chassis up travel when on throttle, making steering more aggressive.

Good for high speed smooth surfaces.

More Rear Droop:

Increases chassis up travel when off throttle and under braking. Increases

steering in low speed corners and under braking.

Less Rear Droop:

Decreases steering in low speed corners, making the vehicle turn smoother.

ROLL CENTER

Point at which the vehicle rolls laterally when cornering.

Higher Roll Center:

Increases the chassis roll on the rear

of the car. Increases rear traction on-power. Decreases rear

traction during braking.

Lower

Roll Center:

Decreases the chassis roll at the rear of

the car. Decreases rear on-power traction. Reduces corner

entry steering. Increases corner exit steering.

Higher Roll Center:

Reduces chassis roll and on-power

steering. The car feels more responsive. Reduces front traction

going into corners. Good for high grip, technical tracks.

Lower

Roll Cente

Roll Center:r:

Increases the chassis roll and on-power

steering. Steering is less responsive, but smoother and more

stable. Better for smooth tracks with high speed corners.

FRONT ROLL CENTER

REAR ROLL CENTER

101010

CHASSIS MAINTENANCE TIPS

Check before every run:

1. All hardware to be sure everything is tight.

2. Transmitter batteries.

3. Moving parts are free from binding.

4. Parts are not broken or damaged.

5. Wires are properly connected.

6. Remove dirt or debris from chassis and moving parts.

7. Bearings should roll smoothly.

8. Shocks should operate smoothly. Check for leakage and reﬁ ll as needed.

9. Gear mesh between the spur and pinion gears.

WHEELBASE

SHOCK OIL

DIFFERENTIAL OIL

Distance between the front and rear wheels.

Decreases off power steering. Better

through rough sections. More stable.

Duratrax 835E User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual