Duratrax Maximum ST User Manual

Warranty

• DuraTrax™will warranty this kit for 90 days after the purchase date from defects in materials or

workmanship. DuraTrax

will either repair or replace, at no charge, the incorrectly made part.

• Make sure you save the receipt or invoice you were given when you bought your model! It is your proof of purchase and we must see it before we can honor the warranty.

• To return your Maximum ST for repairs covered under warranty you should send your truck to:

Hobby Services

1610 Interstate Drive

Champaign, Illinois 61822

Attn: Service Department

Phone: (217) 398-0007 9:00 am - 5:00 pm Central Time M-F

E-mail: hobbyservices@hobbico.com

Before Building:

We want the building and operating of this vehicle to be a success, so BEFORE removing any parts from the parts bags please read this manual thoroughly and watch the included video to familiarize yourself with the model. If for any reason you think this model is not for you, return it to your dealer immediately. PLEASE NOTE: Your hobby dealer cannot accept a return on any model after assembly has begun.

ASSEMBLY AND OPERATION MANUAL

Introduction.................................................................................2

Safety Precautions .....................................................................2

Helpful Hints................................................................................2

Stress-Tech

™

Parts Guarantee...................................................2

Repair Service.............................................................................2

Specification & Description Changes.......................................3

Screw Information ......................................................................3

Required Items for Completion .................................................3

Tools You Will Need....................................................................3

Finishing the RTR Version.........................................................3

Assembly of the Pre-Built Version............................................4

Preparing the Radio System .................................................4

Section 1: Steering Servo Assembly........................................4

Section 2: Assembling the Radio Tray .....................................5

Section 3: Installing the Throttle Servo....................................7

Section 4: Throttle & Brake Linkages.......................................7

Section 5: Radio Adjustments...................................................8

Section 6: Prepare the Engine ..................................................9

Section 7: Installing the Body Mounts ...................................10

Section 8: Finishing..................................................................11

Section 9: Carburetor Settings................................................11

Section 10: Breaking-In the Engine ........................................12

Section 11: Running the Engine .............................................12

Section 12: Engine Maintenance.............................................13

Section 13: Performance Tuning.............................................14

Section 14: Maintenance Tips .................................................14

Engine Trouble Shooting .........................................................15

Thank you for purchasing the DuraTrax Maximum ST. This manual contains the instructions you need to build, operate, and maintain your new nitro R/C truck. Read over this manual thoroughly before building or operating the Maximum ST.

When the safety precautions are followed, the Maximum ST will provide years of enjoyment. Use care and good sense at all times when operating this radio controlled truck. Failure to use this vehicle in a safe, sensible manner can result in injury or damage to property. You and you alone must insure that the instructions are carefully followed and all safety precautions are obeyed.

• Do not operate the Maximum ST near people.

Spectators should be behind the driver or at a safe distance away from the vehicle.

• The engine and exhaust produces quite a bit of noise. If you are disturbed by the amount of noise this truck produces, wear ear protection such as earplugs. Do not run this vehicle when or where it can disturb others.

• The engine and exhaust can become very hot. Avoid touching any of these parts during use and until they have cooled down.

• Model engine fuel is poisonous. Make sure you read and follow all of the precautions on the fuel container. Keep fuel out of the reach of children.

• Model engine fuel is flammable and when ignited has a flame that is difficult to see. Avoid sparks, flames, smoking, or any other ignition source when fuel is near.

• The engine emits carbon dioxide just like real cars. Do not operate this model indoors.

• Before turning on the transmitter, make sure that no one else is on your frequency.

• Avoid working over a deep pile carpet. If you drop a small part or screw, it will be difficult to find.

• Place a mat or towel over your work surface. This will prevent parts from rolling off and will protect the work surface.

• Avoid running the truck in cold weather. The plastic and metal parts can become brittle at low temperatures. In addition, grease and oil become thick, causing premature wear and poor performance.

• Test fit all parts before attaching them permanently.

We have engineered the Maximum ST to take the rough and tumble abuse that makes R/C trucks fun. We are so confident of the quality and durability of the Stress-Tech

™

plastic parts that we will replace any Stress-Tech plastic part you break during the first 6 months you own the truck. Just send in the part to us and we will send you a Free replacement. Please see the Maximum ST parts list for the items covered under the Stress-Tech guarantee.

To receive your free replacement part please send the following to the Hobby Services address listed on the cover of this manual:

• The broken part must be included.

• The part number and description of the broken part.

• Dated copy of your invoice or purchase receipt.

• Your name, phone number and shipping address.

Repair service is available anytime.

• After the 90 day warranty, you can still have your Maximum ST repaired for a small charge by the experts at DuraTrax’s authorized repair facility, Hobby Services, at the address listed on the front page of this manual.

To speed up the repair process, please follow the instructions listed below.

1. Under most circumstances return the ENTIRE system:

truck and radio. The exception would be sending in a Stress-Tech part. See the instructions under Stress-Tech Guarantee.

2. Make sure the transmitter is turned off, all batteries are

removed, and fuel is drained from the tank.

REPAIR SERVICE

STRESS-TECH™PARTS GUARANTEE

HELPFUL HINTS

SAFETY PRECAUTIONS

INTRODUCTION

TABLE OF CONTENTS

3. Send written instructions which include: a list of all items returned, a THOROUGH explanation of the problem and the service needed, and your phone number during the day. If you expect the repair to be covered under warranty, be sure to include a proof of date of purchase (your store receipt or purchase invoice).

4. Also be sure to include your full return address.

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.

Do not use too much force when tightening self-tapping screws into plastic. Overtightening will cause the threads in the plastic to strip. We recommend that you stop turning a self-tapping screw when you feel some resistance as the head of the screw comes in contact with the plastic. Avoid using powered screwdrivers when assembling this kit. They tend to overtighten the screws. Do not use thread locking compound on any self-tapping screws. The thread locking compound may damage the plastic. IMPORTANT: Use thread lock on any fastener that is threaded into metal or fastened with a nut. Vibration from the engine will cause the screws to loosen if thread locking compound is not used.

To operate the Maximum ST these items are required:

• Glow plug starter (Hobbico Hot-Shot -HCAR2505).

• Fuel bottle (DuraTrax Kwik-Pit Bottle - DTXP0125)

• Fuel (DuraTrax Red Alert fuel - DTXP0520)

• Glow plug (O.S®. #A3 plug - OSMG2690)

• Glow plug wrench (DTXR1170)

• It is also helpful to have a couple of extra glow plugs

on hand.

(All of these items are available in a Nitro Starter Pack from DuraTrax - DTXP0200).

For the Pre-Built version of the Maximum ST, you will also need:

• 2-channel radio with (2) standard servos.

•

(12) “AA” batteries - (4) for the receiver and (8) for the transmitter.

• Small bottle of thread locking compound (GPMR6060).

To assemble the Pre-built version (DTXC0055), you will need the following tools:

• Phillips head screwdriver

• Flat blade screwdriver

• Needle-nose pliers

• Wire cutters or diagonal cutters (HCAR0630)

• Hobby knife (HCAR0105), #11 blades (HCAR0211)

❏ 1. Remove the 4-cell battery holder. Place 4 “AA” batteries

(included) in the holder. Remove the battery door from the bottom of the transmitter and install 8 “AA” batteries into the battery holder. See the radio instruction manual for details. Use a tie-strap to secure the battery holder to the radio tray. See steps 8 and 9 of the “Assembling The Radio Tray” section.

❏

2. Install the air cleaner with the tie-strap. These parts are in the box that the transmitter was strapped to. See Step 4 of the “Prepare the Engine” section.

❏

3. Remove the clear covering on the outside of the body. See Step

2 of the “Finishing” section.

❏ 4. Apply decals to the body. See Step 3 of the

“Finishing” section.

❏ 5. Mount the body. See Step 4 of the “Finishing”

section.

❏ 6. Before running your Maximum ST read the entire manual, especially

the “Running the Engine” section and watch the included video.

FINISHING THE RTR VERSION

TOOLS YOU WILL NEED

REQUIRED ITEMS FOR COMPLETION

SCREW INFORMATION

SPECIFICATION & DESCRIPTION CHANGES

M3x14

M3x14 Screw

3mm

14mm

Self-Tapping

Screw

3mm

14mm

1. Install the batteries in the transmitter and the receiver battery holders.

2. Extend the transmitter antenna.

3. Connect the steering servo, throttle servo

and receiver battery to the receiver.

4. Extend the receiver antenna.

5. Adjust the servo trims of the transmitter to the neutral position.

6. Switch on the transmitter.

7. Switch on the receiver.

8. Operate the steering and throttle control. Make sure the servo arms move in proportion to the movement of the steering wheel and throttle trigger.

9. Switch off the receiver, then the transmitter.

Before installing the radio system in the pre-built DuraTrax Maximum ST read the manufacturer’s instructions manual and follow the instructions shown below.

Servo Arm

Steering Servo

Throttle Servo

Receiver Battery Holder

4-AA Batteries

Transmitter

Antenna

8-AA Batteries

Receiver

Receiver Switch

Antenna

PREPARING THE RADIO SYSTEM

ASSEMBLY OF THE PRE-BUILT VERSION (DTXC0055)

Place a check mark in the check boxes after each step is completed.

❏ Step 1. From bags PA001 and PA003, remove (8) 3 x

8mm

self-tapping screws, and the (2) L-shaped servo mounts.

❏ Step 2. Attach the servo mounts to the steering servo

with (4) 3 x 8mm self-tapping screws.

Note that the servo

spline will mount towards the rear of the

truck.

❏ Step 3. Attach the steering servo assembly to the chassis

with (4) 3 x 8mm self-tapping screws in the holes provided as shown above.

SECTION 1: STEERING SERVO ASSEMBLY

❏ Step 4. From bag PA001, remove the steering rod. Note

the shape of the rod.

❏ Step 5. Use a 3 or 4 hole servo arm from your radio

system. A 1, 2, or 4-armed servo arm will work. Cut off all but one of the arms by scoring both sides of the servo arm with a hobby knife and using pliers to snap off the arm.

❏ Step 6. Put the steering rod into the third hole from the

center of the servo arm (approximately 5/8" or 16mm). You may need to enlarge the hole in the servo arm with a 5/64" (2mm) drill or a hobby knife.

❏ Step 7. Slip the steering rod through the hole in the rod

connector that is already installed on the servo saver. (Use

the screw that came with your radio system to attach the servo arm to the steering servo.) Do not tighten the set screw on the rod connector. You will make the steering adjustments later.

❏ Step 1. From bag PA002, remove all of the parts

included; the radio tray, the (2) radio tray mounts, and the (8) 3 x 8mm self-tapping screws.

❏ Step 2. Using the provided double-sided tape, attach the

radio receiver to the bottom of the radio tray. To find the bottom of the radio tray, put the large circular hole to the upper left as shown.

❏ Step 3. Attach the switch from your radio system so it

protrudes on the top of the servo tray (make sure the switch is in the OFF position). Remove the two screws on the top of the switch. Place the switch plate on top of the radio tray, the switch body on the bottom of the radio tray and then insert the screws from the top.

SECTION 2: ASSEMBLING THE RADIO TRAY

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