Traxxas 85076-4 Owner'S Manual Download Page 28

28 • DESERT  RACER

MAINTAINING YOUR MODEL

Your model requires timely maintenance in order to stay in top 
running condition. 

The following procedures should be taken  

very seriously.

Frequently inspect the vehicle for obvious damage or wear.  
Look for:

1.    Cracked, bent, or damaged parts 
2.    Check the wheels and steering for binding. 
3.    Check the operation of the shock absorbers. 
4.    Check the wiring for any frayed wires or loose connections.
5.    Check the mounting of the receiver and servo(s) and  

speed control.

6.    Check the tightness of the wheel nuts with a wrench.
7.    Check the operation of the radio system, especially the condition of  

the batteries.

8.    Check for any loose screws in the chassis structure  

or suspension.

9.    Check the operation of the steering servo and ensure that it is  

not binding. 

10.  Inspect the gears for wear, broken teeth, or debris lodged between 

the teeth. 

Other periodic maintenance:

• 

Chassis

: Be sure to keep the motor and ESC free of grass, dirt and 

grime to be sure to keep the components cool for optimal run 
times and temperatures.

• 

Suspension

: Periodically inspect the model for signs of damage, 

such as bent or dirty suspension pins, damaged toe links, loose 
screws, and any signs of stress or bending. Replace components as 
needed.

• 

Steering

: Over time, you may notice increased looseness in the 

steering system. The toe links may wear out from use (part #8547). 
Replace these components as needed to restore factory tolerances. 

• 

Shocks

: Keep the oil level in the shocks full. Use only 100% 

pure silicone shock oil to prolong the life of the seals. If you are 
experiencing leakage around the top of the shock, inspect the 
bladder in the top cap for signs of damage or distortion from 
overtightening. If the bottom of the shock is leaking, then it is time 
for a rebuild. The Traxxas rebuild kits for two shocks is part #8455  
and #7468X.  

• 

Driveline

: Inspect driveshafts to make sure the drive pins are not 

cracked or extremely worn. Additional driveline noise can occur if 
the driveline components are worn out. Remove the gear cover. 
Inspect the spur gear for wear and check the tightness of the set 
screws in the pinion gears. Tighten, clean, or replace components 
as needed.

• 

Torque-biasing Center Drive Unit

: The Unlimited Desert Racer is 

equipped with a torque-biasing center drive unit. The drive unit can 
be rebuilt, but it requires a detailed maintenance procedure and 
the use of 20MM weight differential oil (part #5040). For additional 
information and how-to videos, please visit Traxxas.com.

• 

Rear Drivetrain and Transmission Planetary Gears

: Periodically 

inspect the planetary gears and bearings for damage or excessive 
wear. Remove, disassemble, clean, and re-grease the components. 
Remove, clean, and re-oil the bearings. Replace components as 
needed.

• 

Rear Center Driveshaft:  

Frequently inspect the rear center 

driveshaft for wear. Apply small amounts of high-performance 
grease (part #5041) at the pin location on each end of the 
driveshaft.  Make sure no parts are excessively worn or 
deteriorated. Replace the driveshaft assembly if damaged.

• 

Transmission Output Shaft: 

The rear transmission output shaft is 

greased for a smooth fit to the bearings. Also, there is an x-ring seal 
installed to keep the grease from coming out of the transmission. 
Periodically check to be sure the x-ring is in place. Add grease to 
the shaft when necessary.

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, also remove the batteries from the transmitter.

Always wear eye protection 
when using compressed 
air or spray cleaners and 
lubricants.

High performance vehicles 
generate small vibrations 
while driving. These 
vibrations may loosen 
hardware over time and 
require attention. Always 
check your wheel nuts and 
other hardware and tighten 
or replace when necessary.

10

Summary of Contents for 85076-4

Page 1: ...MODEL 85076 4 owner s manual...

Page 2: ...t you will find it helpful and fast Be sure and read through the rest of the manual to learn about important safety maintenance and adjustment procedures Turn to page 10 to begin 3 BEFORE YOU PROCEED...

Page 3: ...is also available at Traxxas com support You may also e mail customer support with your question at support Traxxas com Join thousands of registered members in our online community at Traxxas com Tra...

Page 4: ...R TO CHARGE LIPO BATTERIES AS THIS CAN CAUSE FIRE RESULTING IN PROPERTY DAMAGE AND OR PERSONAL INJURY OR DEATH Terms of Use This product is surrendered by Traxxas to the purchaser with the understandi...

Page 5: ...d the maximum manufacturer recommended charge rate DO NOT attempt to charge non rechargeable batteries explosion hazard batteries that have an internal charge circuit or a protection circuit or batter...

Page 6: ...other unauthorized driver Always disconnect the batteries in the model when it is not in use Never store the vehicle with batteries in the model as this can cause a fire leading to property damage ser...

Page 7: ...your hobby dealer to operate and maintain your model Supplied Tools and Equipment Required Equipment Battery and charger style are subject to change and may vary from images 4 AA alkaline batteries Li...

Page 8: ...Electronic Speed Control LED Light Pipe Axle Carrier Receiver Box Antenna Mount Upper Suspension Arm Toe Link Shock Roll Cage Rear Driveshaft Assembly spare Driveshaft Rear Swaybar Linkage Trailing Ar...

Page 9: ...View Motor Spur Gear Pinion Gear Battery Hold Down Steering Servo Chassis Skidplate Rear Upper Link Limit Strap Transmission Front Skidplate Trailing Arm Shock Driveshaft Lower Suspension Arm Rear Axl...

Page 10: ...and that there is no interference from outside sources 3 Install batteries in the transmitter See page 14 8 Detail your model See sidebar page 11 The transmitter requires 4 AA alkaline batteries sold...

Page 11: ...ator and brush arrangement with intelligent electronics that energize the electromagnetic windings in sequence to provide rotation Opposite of a brushed motor the brushless motor has its windings coil...

Page 12: ...of the neutral position of the servos made by adjusting the throttle and steering trim knobs on the face of the transmitter Note The Multi Function knob must be programmed to serve as a throttle trim...

Page 13: ...Trim Multi Function Knob Throttle Trigger Throttle Neutral Adjust Steering Wheel Channel 1 Steering Servo 2200Kv Brushless Motor Channel 2 VXL 6s Electronic Speed Control Antenna Power Switch Battery...

Page 14: ...become extremely hot and damage or injury could occur SELECTING A CHARGER FOR YOUR MODEL Make certain you choose the correct type of charger for the batteries you select Traxxas recommends you choose...

Page 15: ...d menus for the easiest and safest charging solution possible Visit Traxxas com to learn more about this feature and available Traxxas iD chargers and batteries TRAXXAS TQi RADIO VELINEON POWER SYSTEM...

Page 16: ...operation Plug the 4s accessory adapter into the 2s 3s battery connector from the speed control When using a Traxxas 5000mAh 4s battery pack part 2888X install foam battery spacers in the battery com...

Page 17: ...miss it simply turn off the transmitter and start over Always turn on the transmitter before plugging in the battery RADIO SYSTEM BASIC ADJUSTMENTS Throttle Neutral Adjustment The throttle neutral adj...

Page 18: ...ur radio system to ensure that it operates properly 1 Turn on the radio system and check its operation as described in the previous section 2 Have a friend hold the model Make sure hands and clothing...

Page 19: ...ding drifting and so on On surfaces with very little traction loose dirt smooth concrete ice snow increase TSM to maximize acceleration and control Drive with TSM on and off to test how it is making y...

Page 20: ...D turns solid green then solid red and then begins blinking red It will blink once then twice then three times then repeat One blink Sport Mode is the default setting It allows full forward and revers...

Page 21: ...3 When the LED blinks red three times release the EZ Set button 4 The LED will blink and then turn solid green The model is ready to drive Note If you missed the mode you wanted keep the EZ Set butto...

Page 22: ...XL 6s will automatically shut down fail safe mode The LED on the speed control will slowly blink red indicating a low voltage shutdown Stop driving the model The VXL 6s will stay in this mode until fu...

Page 23: ...e obstruction before continuing Do not push or pull objects with the model Because the model is controlled by radio it is subject to radio interference from many sources beyond your control Since radi...

Page 24: ...re Each hole should be near the tire center line 180 degrees apart 3 Confirm that the receiver box O ring and cover are installed correctly and secure Make sure the screws are tight and the blue O rin...

Page 25: ...earings Remove clean and re oil the bearings RECEIVER BOX MAINTAINING A WATERTIGHT SEAL Removing and Installing Radio Gear The unique design of the receiver box allows the removal and installation of...

Page 26: ...gearing from the pin location chart Replace the spur and pinion gears as needed When installing the motor install the pin into its proper location based on the gearing that is chosen The pin on the bo...

Page 27: ...ing Lowering the viscosity of the oil will cause the suspension damping to be reduced Damping should be increased with higher viscosity oil if the model is bottoming easily over jumps Damping should b...

Page 28: ...ve pins are not cracked or extremely worn Additional driveline noise can occur if the driveline components are worn out Remove the gear cover Inspect the spur gear for wear and check the tightness of...

Page 29: ...ight of shock oil available to you From the factory the Desert Racer is equipped with pistons with 1 7mm bypass holes recommended Shock disassembly The shocks must be removed from the vehicle and disa...

Page 30: ...The differential is filled with silicone differential fluid and is sealed to maintain consistent long term performance Changing the oil in the differential with either lower or higher viscosity oil wi...

Page 31: ...ty setting Steering Percentage Dual Rate The Multi Function knob can be set to control the amount percentage of servo travel applied to steering Turning the Multi Function knob fully clockwise will de...

Page 32: ...made with the Multi Function knob are overlaid on top of each other For example if you assign the Multi Function to adjust Steering Percentage and set it for 50 then reassign the knob to control Stee...

Page 33: ...o select any model from a list of model memory entries The transmitter and receiver do it all for you automatically To activate Model Lock 1 Switch on the transmitter and receiver you wish to lock 2 P...

Page 34: ...s how to navigate through the TQi transmitter s various settings and functions Press and hold MENU to enter the Menu Tree and use the following commands to navigate through the menu and select options...

Page 35: ...en LED blinks Press SET red LED blinks x3 Press MENU twice red LED blinks x3 Turn steering wheel to desired max left and right travel x8 Press SET to save each position Turn steering wheel to test set...

Page 36: ...ums minimums or averages Use the recording function to document your dashboard view with sound so that you can keep your eyes on your driving and not miss a single apex Manage up to 30 Models with Tra...

Page 37: ...6250 TRAXXAS WAY McKINNEY TEXAS 75070 1 888 TRAXXAS 180403 85076 4 OM EN R01 owner s manual...

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