XTM Racing Mammoth ST User Manual
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XTM Racing Mammoth ST User Manual

Operation, tuning guide and replacement parts
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OPERATION, TUNING GUIDE AND REPLACEMENT PARTS
I
H
A
R
NCLUDES
ITEC
GGRESSOR
IMPORTANT
Before operating your new XTM Racing Mammoth ST
Nitro Stadium Truck, please read and understand the warnings listed on
the next page. Failure to do so could lead to bodily harm and/or injury.
The XTM Racing Mammoth ST Nitro Stadium Truck is not intended for
persons under 12 years of age, unless closely supervised by an adult.
DISTRIBUTED EXCLUSIVELY BY
Global Hobby Distributors
18480 Bandilier Circle, Fountain Valley, CA 92708
All contents copyright © 2005, Global Hobby Distributors
Version V1.0 May 2005
P
XTM 24.7 E
ADIO AND
OWERFUL
MAMMOTH ST NITRO STADIUM TRUCK FEATURES:
Factory-Built and Painted
Powerful XTM Racing 24.7 Engine with Tuned Pipe
Hitec Aggressor AM Radio System
High-Torque Metal Gear Steering Servo
2-Speed Transmission for Awesome Speed
Low Center of Gravity for Awesome Handling
Double Bracing Front and Rear
New Upper Arm Design for More Precise Handling
Full Ball Bearings
Heavy-Duty Side Dust Guards
3mm Aluminum Chassis with Curved Edges for Added Strength
!
NGINE
Large Front Bumper and Skid Plate
Triple Vented Disc Brakes
Chrome-Plated Universals and Dogbones for Added Strength
Steel Differentials
Gear Boxes Allow Easy Differential Removal
3.5mm Rear Sway Bar
Fully Threaded, Oil-Filled Aluminum Shocks with 3.5mm Shafts
Dish-Style Racing Wheels with 17mm Hex Mounts
Factory-Glued Tires with Inserts
Adjustable Camber, Caster and Toe-In Front and Rear
Water Resistant Receiver and Battery Boxes
1
Kit Product # 145619

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  • Page 1 Failure to do so could lead to bodily harm and/or injury. Steel Differentials Gear Boxes Allow Easy Differential Removal The XTM Racing Mammoth ST Nitro Stadium Truck is not intended for persons under 12 years of age, unless closely supervised by an adult. 3.5mm Rear Sway Bar Fully Threaded, Oil-Filled Aluminum Shocks with 3.5mm Shafts...
  • Page 2 We urge you to come check out our website at http://globalservices.globalhobby.com. There you will find public message boards frequented by other XTM Racing product owners and the XTM Racing support staff. This is a great place to learn about new XTM Racing products, get help and suggestions for your current XTM Racing products or just simply hang out and chat with people that share your same interests.
  • Page 3 SOME POPULAR HOP-UPS FOR YOUR MAMMOTH ST NITRO STADIUM TRUCK XTM Racing produces popular hop-ups for your Mammoth ST Nitro Stadium Truck. Please see page # 57 for a list of hop-ups, including a reverse module kit. New hop-ups are always in the works, so check our website often.
  • Page 4 "idle bar". Using the wrong type of glow plug will cause the engine to run erratically and make it difficult to tune properly. The wrong type of glow plug could also damage the engine. AN XTM RACING # 3 GLOW PLUG IS INCLUDED IN THE ENGINE.
  • Page 5 You can purchase transmitter and receiver crystals separately and change them if you plan on running your Mammoth ST Nitro Stadium Truck with other people. We have provided a list of the frequencies that are available for your radio system.
  • Page 6 Body Mount: Made of high-impact nylon plastic for strength, the body mount secures the body into place. Engine: The Mammoth ST Nitro Stadium Truck includes the powerful XTM Racing 24.7 engine with pull-starter and tuned pipe for ease of use and great performance.
  • Page 7 PREPARING TO RUN YOUR MAMMOTH ST NITRO STADIUM TRUCK Now that you are familiar with the major component parts of your Mammoth ST Nitro Stadium Truck, and with the functions of the Hitec Aggressor transmitter, it's time to prepare your Mammoth ST Stadium Truck for its first run.
  • Page 8 If you would like to upgrade to a rechargeable NiMH battery pack, instead of using Alkaline dry cells, we suggest using the XTM Racing 5 cell 1000mAH NiMH RX Battery Pack (P/N 145801). Not only is this battery pack rechargeable, but because it's a 5-cell battery, it will operate the servos at a higher power rating and faster speed.
  • Page 9 If the radio system does not operate properly, please refer to the troubleshooting guide on page # 22 before continuing further. Never attempt to operate your Mammoth ST Nitro Stadium Truck if the radio control system is not functioning properly.
  • Page 10 Rotate the transmitter's wheel backward (to the left). The truck's front wheels should turn left. Let go of the transmitter wheel. The truck's wheels should return to center. IMPORTANT If the wheels do not point straight ahead (center) after you return the transmitter wheel to center, turn the steering trim dial on the transmitter to adjust the wheels so that they point straight ahead.
  • Page 11 WARNING!! PLEASE READ THIS INFORMATION BEFORE PROCEEDING!! Your Mammoth ST Nitro Stadium Truck comes equipped with the user-friendly and powerful XTM Racing 24.7 nitro engine. Before starting the engine for the first time, you MUST read this section very carefully. This section details the different parts of the engine's carburetor and how to adjust the carburetor's needle valves to tune the engine.
  • Page 12 From this point, turn the low speed needle valve counterclockwise 3 full turns. This is the factory setting. FUELING AND STARTING THE XTM RACING 24.7 NITRO ENGINE WARNING!! PLEASE READ THIS BEFORE STARTING YOUR ENGINE FOR THE FIRST TIME!! If at any time the pull-starter becomes very tight or difficult to pull - STOP! The engine has become flooded and the excess fuel must be removed from the engine or damage to the pull-starter and/or engine could occur.
  • Page 13 IMPORTANT TIP ABOUT GLOW PLUGS An XTM Racing # 3 Hot Heat-Range glow plug is included with your engine. We suggest having a couple of extra glow plugs handy, because it can be expected that glow plugs will wear out quickly during the engine's break-in process. This glow plug will suit most users during the break-in process.
  • Page 14 XTM Racing # 3 (P/N 146020 ) during the break-in process. After the break-in period you may want to use a different heat-range glow plug. Use a colder glow plug like the XTM Racing # 4 (P/N 146021) if you're using 30% nitro fuel.
  • Page 15 STEP 1: BREAKING IN THE ENGINE WARNING Do not adjust the low speed needle valve until after the engine has been broken in. You can begin to adjust the low speed needle valve after you have broken in the engine and after you have read and understood Step 2: Fine Tuning the Engine below. The high speed needle valve is preset from the factory for easy starting in most conditions for the break-in period.
  • Page 16 SETTING THE HIGH SPEED NEEDLE VALVE: Start the engine and remove the glow starter from the glow plug, then allow the engine to warm up for about 10 seconds. After the engine has warmed up, drive the truck as you normally would. If the engine seems to be running rich (i.e., not reaching maximum power), lean the high speed needle valve about 1/16 of a turn at a time until the desired setting is achieved.
  • Page 17 Chassis alignment and geometry are important if you want your truck to perform well. A good performing truck means a truck that is easier to drive, too. Follow our guidelines in this section to get the most out of your Mammoth ST Nitro Stadium Truck.
  • Page 18 ADJUSTING THE TOE ANGLE The toe angle is the angle of both front tires (or rear tires) to each other, when viewed from above. Toe-in is when the front of both tires point toward each other and toe-out is when the front of both tires point away from each other. For the front tires, toe-in will make your truck track straighter, but the steering will be more sensitive.
  • Page 19 ADJUSTING THE 2-SPEED TRANSMISSION SHIFT POINT The transmission shift point has been preset for you from the factory, but it is possible to fine tune the adjustment to suit your driving style. The shift point is the point at which the 2-speed transmission will shift from first gear to second gear. Adjust the shift point by turning the small grub screw in the aluminum 2-speed clutch housing, using a 1.5mm hex wrench.
  • Page 20 If the area is bumpy and you use harder springs, the truck will have a tendency to jump and hop around. The shock springs included with the Mammoth ST Nitro Stadium Truck are suitable for most general off-road applications, but experimentation with different shock springs may be necessary to find a setup that suits your particular driving style and location.
  • Page 21 MAINTAINING YOUR MAMMOTH ST NITRO STADIUM TRUCK Following a simple maintenance schedule will ensure that your Mammoth ST Nitro Stadium Truck, XTM Racing 24.7 engine and Hitec Aggressor radio control system operate in top condition every time you use them. It is strongly suggested.
  • Page 22 This troubleshooting guide has been provided to help you diagnose and solve most problems that you may encounter with your Mammoth ST Nitro Stadium Truck. Most problems encountered can be solved by carefully following the problem-cause-solution sections. If you cannot solve the problem using this troubleshooting guide, please feel free to contact us using the Customer Service Information on page # 2.
  • Page 23 IF YOU'RE HAVING A PROBLEM WITH THE MAMMOTH ST NITRO STADIUM TRUCK CHASSIS: PROBLEM CAUSE SOLUTION 1) Truck pulls to one side A) Steering trim out of adjustment A) Readjust trim to center both wheels (P10) B) Toe angle out of adjustment...
  • Page 24 XTM Racing order number. For simplicity and ease of ordering replace- ment parts, the XTM Racing order number is also listed on the corresponding parts drawings in the Assembly Manual, so it’s easy for you to cross-reference the parts you need.
  • Page 49 EXPLODED VIEW...
  • Page 50 The part numbers that begin with letters (i.e., MV107) are manufacturer numbers. These numbers can be used when ordering parts. They can also be used to cross-reference parts to the 6-digit XTM Racing part numbers. Note that most parts drawings also include a list of manufacturer assembly parts numbers and quantity.
  • Page 56 SECTION 3: HOP-UP PARTS DRAWINGS AND PARTS LIST (PAGES 57 - 61)
  • Page 59 HOP-UP PARTS LIST BEGINS ON NEXT PAGE...
  • Page 64 Before returning your Mammoth ST Nitro Stadium Truck for warranty consideration, the status of the unit must be within the guarantee as stated above. Do not return your Mammoth ST Nitro Stadium Truck to the place of purchase. They are not authorized or equipped to perform warranty work on XTM Racing products.

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