® ™ ™ ASSEMBLY AND OPERATION MANUAL www.duratrax.com www.duratrax.com www.warheadmt.com www.warheadmt.
ITEMS INCLUDED The following items are included in the box. Chassis Body (Not Shown) Body Clips (Qty 8) Decal Sheet (Not Shown) Transmitter Transmitter Antenna Transmitter Flag (Not Shown) Air Filter Oil (Qty 2) Receiver Antenna Tube (Not Shown) 1.5 mm Hex Wrench 2.0 mm Hex Wrench 2.
THINGS TO KNOW SAFETY PRECAUTIONS SPECIFICATION AND DESCRIPTION CHANGES STRESS-TECH™™ PARTS GUARANTEE All pictures, descriptions and specifications found in this instruction manual are subject to change without notice. DuraTrax maintains no responsibility for inadvertent errors in this manual. Visit www.duratrax.com for the latest updates and information for your model. We have engineered the Warhead EVO to take the rough and tumble abuse that makes R/C trucks fun.
FINISHING THE WARHEAD EVO TRANSMITTER PREPARATION • Install eight “AA” batteries into transmitter, making sure the polarity is correct. • Insert the antenna into the top of the transmitter and tighten. • Turn the transmitter on and check the battery light. If the red light glows steady, turn off the transmitter. If the red light blinks, the batteries are low and should be replaced. RECEIVER BATTERY INSTALLATION • Remove the receiver battery holder. • Install (4) “AA” batteries.
RECEIVER ANTENNA INSTALLATION • Uncoil and straighten the antenna wire. • Route the receiver antenna wire through the antenna tube. • Install the tube into the antenna mount. X DO NOT CUT ANTENNA WIRE! OIL THE AIR FILTER • Remove the air filter cap and foam element. • Apply both tubes of the included air filter oil onto the foam element, squeezing the element until it is completely coated with the oil. TIP! Placing the element in a plastic bag will help keep your hands clean.
RADIO SYSTEM CHECK ! CHECK THE RADIO SYSTEM FOR PROPER FUNCTION BEFORE EACH RUN • Turn the transmitter on, then turn the receiver on. • Turn the transmitter wheel to the right—the front wheels should turn to the right. If not, move the steering servo reverse switch. • When running, adjust the steering trim so the truck tracks straight. • Pull the throttle trigger to make sure the carburetor opens fully and the throttle linkage functions properly without binding.
R UNNING THE ENGINE ENGINE TUNING GUIDE Before running the engine, read the manual and watch the assembly and engine tuning video that came with this kit. HIGH-SPEED NEEDLE The “high-speed” needle is sticking up from the carburetor. This controls the fuel to air mixture of the carburetor. The needle is pre-set for break-in from the factory at 4-1/2 turns out from fully closed.
Important! At this point, the engine will likely be running at a faster idle speed than needed (This is typical after breakin). Adjust the idle stop screw to lower the idle speed so that the wheels do not, or just barely, rotate when you lift the truck off the ground. BREAK IN PR OCEDURE SOME THINGS TO REMEMBER DURING BREAK-IN 1. Run with the body off. This will keep the engine cooler. 2. Keep the air cleaner on at ALL times 3. Run on a smooth, hard surface. An empty parking lot is perfect. 4.
FUEL SYSTEM The fuel line is susceptible to pinhole leaks. You usually cannot see the hole in the fuel line, but if you see air bubbles in the line going to the carburetor, replace the fuel line. Another symptom of a leak in the fuel line is a surging engine. A properly tuned engine will surge when the air bubbles hit the carburetor. It is basically leaning out the mixture. GENERAL INFORMATION GLOW PLUG The glow plug is an item that will wear out and need replacement from time to time.
MAINTENANCE TUNING TIPS GUIDE BEFORE EACH RUN 1. IMPORTANT: Check to make sure that all screws are tight. Pay particular attention to the screw pins in the drive cups. Always use threadlock (DTXR2010) on screws going into metal. When tuning the Warhead EVO make sure that you have equal lengths from one side to the other on the shocks, camber rods and steering rods. Also, make sure to have the shock pre-load adjusters at the same setting from left to right. They do not have to be the same front to rear.
TOE-IN AND TOE-OUT CAMBER Toe-in is when the fronts of the tires point towards each other. Toe-in increases stability during acceleration and high speed. However, toe-in also decreases steering when entering a corner. Toe-out will increase steering into corners, but will decrease the overall stability during acceleration. The front typically is set-up with 0 to -2 degrees of toe-in. Toe-out is when the fronts of the tires point away from each other.
SHOCK OILS AND SHOCK SPRINGS Many different combinations can be used between the shock oils and shock springs. Some basic guidelines when setting up the Warhead EVO are that if the rear end is stiff it will give the truck more steering and have less rear traction. Stiffening the front will result in less steering and more rear traction. Changing the position of the threaded shock pre-load adjusters results in ride-height change only. It does not change the spring tension.
MAINTENANCE GUIDE DIFFERENTIAL The following section is provided to help you with maintenance and repairs to your Warhead EVO. Pay extra attention to the notes and tips for proper assembly. Make sure the bearings are fully seated on the differential case. Make sure the bearings are fully seated on the differential case. ! Be sure to use threadlock on all screw pins (PP). Fill the diff case with quality oil. NOTE: Fill the case until the bevel gear shafts are covered.
Thread the turnbuckle into the upper suspension arms equally. Adjust to desired camber after assembly is complete. FRONT SUSPENSION Use threadlock on set screw. ! Make sure the knuckles turn without resistance. 14 The knuckle arm extension plate (159) mounts to the bottom of the knuckle arm (29).
REAR SUSPENSION Thread the turnbuckle into the upper suspension arms equally. Adjust to desired camber after assembly is complete. Use threadlock on set screw. The turnbuckle has left- and right-hand threads. Be sure to note this during assembly and assemble so the turnbuckles are oriented the same on both sides of the truck.
7 CHASSIS ASSEMBLY QQ A C P 2 3 NN 6 QQ C QQ 1 4 C 5 A I C NN P QQ CLUTCH ASSEMBLY Position as shown. The trailing edge is shaped differently.
ENGINE MOUNT ! USE THREADLOCK ON ALL SCREWS. GEAR MESH Adjust the gear mesh so you can just feel a little bit of play. Too tight, and the gears will wear prematurely. Too loose, and the gears will strip.
SHOCK TOWER & MOUNT 18
SHOCKS Apply a generous amount of shock oil to the shock shaft assembly before installing into the O-ring assembly. If the shock shaft is scratched, it will prematurely wear the shock shaft O-rings, causing leaks. Make sure not to thread the shock ball end (110) too far onto the shock shaft. Completely fill the shock body (101) with shock oil. Slowly work the piston up and down to remove air bubbles. Do not push the piston out of the shock oil.
RADIO GEAR SHIFT SERVO When adjusting the shift linkage, make sure the shift lever will move completely in and out. Roll the wheels to be sure you have full engagement. The truck should roll smoothly without any “clicking” noise. ! USE THREADLOCK ON ALL SET SCREWS. RECEIVER AND BATTERY BOX The Warhead battery box was designed to accept the optional 5-cell rechargeable battery pack (DTXM2030).
THROTTLE/BRAKE SERVO Make sure the bellcrank posts (78) key into the radio tray (79) and front chassis skid plate (5). To prevent servo damage, do not overtighten. If in doubt, set it loose. The ends of the steering drag link (71) should sweep rearward.
Grease the thrust bearing. Use a generous amount of thread lock. TRANSMISSION Note the direction of the rear reverser lock (145). ! USE THREADLOCK ON ALL SET SCREWS. The recessed side of the 2-speed clutch (119) goes on last. Tighten the set screw (J) through the slot in the 2nd gear housing (120). Be sure not to overtighten or tighten the shift point adjustment set screw (G).
ENGINE TROUBLESHOOTING The Engine Starts YES It should be ready to go. Clear the engine of fuel. YES Is the high speed needle setting 3-1/2 to 3-3/4 turns out from closed (if the engine is broken-in)? Does it run continuously? NO YES Is fuel getting YES to the engine? Does the engine quit when the glow plug clip is removed? YES Replace the glow plug. NO NO NO Make sure the fuel line is connected and check for leaks. Reset the high speed needle.
OTHER ITEMS AVAILABLE FROM DURATRAX 5-CELL RECEIVER 1400mAh NiMH PACK DTXM2016 FLASHPOINT DTXP3100 ULTIMATE TOOL SET DTXR0400 FREQUENCY CHECKER DTXP3110 CLEAN FLOW XL FUEL FILTER DTXC2552 ULTIMATE FLYWHEEL WRENCH DTXR1105 FAILSAFE UNIT DTXM4000 CAMBER GAUGE DTXR1145 PIT TECH THREADLOCKER DTXR2010 STREET TRAC TIRES DTXC5260 UNIVERSAL STARTER BOX DTXP5701 Visit our website at www.duratrax.com for more exciting products from DuraTrax! Copyright © 2006 V1.
