Xray M18 PRO User manual

®
1/18 LUXURY HIGH-COMPETITION 4WD RACING CAR

2
BEFORE YOU START
The M18 PRO is a high-quality, 1/18-scale nitro truck intended for persons aged 16 years and older with previous experience building and
operating RC model racing cars. This is not a toy; it is a precision car model. This model racing car is not intended for use by beginners,
inexperienced customers, or by children without direct supervision of a responsible, knowledgeable adult. If you do not fulfill these
requirements, please return the kit in unused and unassembled form back to the shop where you have purchased it. Before building and
operating your M18 PRO, YOU MUST read through all of the operating instructions and instruction manual and fully understand them to get
the maximum enjoyment and prevent unnecessary damage. Read carefully and fully understand the instructions before beginning assembly.
Make sure you review this entire manual, the included engine instructions, and examine all details carefully. If for some reason you decide the M18
PRO is not what you wanted or expected, do not continue any further. Your hobby dealer cannot accept your M18 PRO kit for return or exchange
after it has been partially or fully assembled.
Contents of the box may differ from pictures. In line with our policy of continuous product development, the exact specifications of the kit may vary
without prior notice.
SAFETY PRECAUTIONS
WARNING: This product contains a chemical known to the state of California to cause cancer and birth defects or other reproductive harm.
When building, using and/or operating this model always wear protective glasses and gloves.
Take appropriate safety precautions prior to operating this model. You are responsible for this model‘s assembly and safe operation! Please
read the instruction manual before building and operating this model and follow all safety precautions. Always keep the instruction manual at
hand for quick reference, even after completing the assembly. Use only genuine and original authentic XRAY parts for maximum performance.
Using any third party parts on this model will void guaranty immediately.
Improper operation may cause personal and/or property damage. XRAY and its distributors have no control over damage resulting from
shipping, improper construction, or improper usage. XRAY assumes and accepts no responsibility for personal and/or property damages
resulting from the use of improper building materials, equipment and operations. By purchasing any item produced by XRAY, the buyer expressly
warrants that he/she is in compliance with all applicable federal, state and local laws and regulation regarding the purchase, ownership and use
of the item. The buyer expressly agrees to indemnify and hold harmless XRAY for all claims resulting directly or indirectly from the purchase,
ownership or use of the product. By the act of assembling or operating this product, the user accepts all resulting liability. If the buyer is not
prepared to accept this liability, then he/she should return this kit in new, unassembled, and unused condition to the place of purchase.
Failure to follow these instructions will be considered as abuse and/or neglect.
In line with our policy of continuous product development, the exact specifications of the kit may vary.
In the unlikely event of any problems with your new kit, you should contact the model shop where you
purchased it, quoting the part number. We do reserve all rights to change any specification without prior
notice. All rights reserved.
CUSTOMER SUPPORT We have made every effort to make these instructions as easy to understand as possible. However, if you have
any difficulties, problems, or questions, please do not hesitate to contact the XRAY support team at [e-mail]. Also, please visit our
Web site at www.teamxray.com to find the latest updates, set-up information, option parts, and many other goodies. We pride ourselves on taking
excellent care of our customers.
You can join thousands of XRAY fans and enthusiasts in our online community at: www.teamxray.com
XRAY Europe
Pred Polom 762, 91101 Trenčín
Slovakia, EUROPE
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
XRAY USA
RCAmerica, 167 Turtle Creek Boulevard Suite C
Dallas, Texas 75207, USA
Phone: [phone] * [phone]
Fax: [phone]
E-mail: [email protected]
IMPORTANT NOTES – GENERAL
• This product is not suitable for children under 16 years of age without the direct supervision of a responsible and knowledgeable adult.
• Carefully read all manufacturers warnings and cautions for any parts used in the construction and use of your model.
• Assemble this kit only in places away from the reach of very small children.
• First-time builders and users should seek advice from people who have building experience in order to assemble the model correctly and to
allow the model to reach its performance potential.
• Exercise care when using tools and sharp instruments.
• Take care when building, as some parts may have sharp edges.
•
Keep small parts out of reach of small children. Children must not be allowed to put any parts in their mouth, or pull vinyl bag over their head.
• Read and follow instructions supplied with paints and/or cement, if used (not included in kit).
• Immediately after using your model, do NOT touch equipment on the model such as the engine and muffler, because they generate high
temperatures. You may seriously burn yourself seriously touching them.
• Follow the operating instructions for the radio equipment at all times.
• Do not put fingers or any objects inside rotating and moving parts, as this may cause damage or serious injury as your finger, hair, clothes, etc.
may get caught.
• Be sure that your operating frequency is clear before turning on or running your model, and never share the same frequency with somebody
else at the same time. Ensure that others are aware of the operating frequency you are using and when you are using it.
•
Use a transmitter designed for ground use with RC cars. Make sure that no one else is using the same frequency as yours in your operating area. Using
the same frequency at the same time, whether it is driving, flying or sailing, can cause loss of control of the RC model, resulting in a serious accident.
• Always turn on your transmitter before you turn on the receiver in the car. Always turn off the receiver before turning your transmitter off.
• Keep the wheels of the model off the ground when checking the operation of the radio equipment.
• Disconnect the battery pack before storing your model.
• When learning to operate your model, go to an area that has no obstacles that can damage your model if your model suffers a collision.
• Remove any sand, mud, dirt, grass or water before putting your model away.
• If the model behaves strangely, immediately stop the model, check and clear the problem.
• To prevent any serious personal injury and/or damage to property, be responsible when operating all remote controlled models.
• The model car is not intended for use on public places and roads or areas where its operation can conflict with or disrupt pedestrian or vehicular traffic.
•
Because the model car is controlled by radio, it is subject to radio interference from many sources that are beyond your control. Since radio
interference can cause momentary loss of control, always allow a safety margin in all directions around the model in order to prevent collisions.
• Do not use your model:
*Near real cars, animals, or people that are unaware that an RC car is being driven *In places where children and people gather *In
residential districts and parks *In limited indoor spaces *In wet conditions *In the street *In areas where loud noises can disturb others,
such as hospitals and residential areas *At night or anytime your line of sight to the model may be obstructed or impaired in any way.
To prevent any serious personal injury and/or damage to property, please be responsible when operating all remote controlled models.
R/C & BUILDING TIPS
• Make sure all fasteners are properly tightened. Check them periodically.
• Make sure that chassis screws do not protrude from the chassis.
• For the best performance, it is very important that great care is taken to ensure the free movement of all parts.
• Clean all ball-bearings so they move very easily and freely.
• Tap or pre-thread the plastic parts when threading screws.
• Self-tapping screws cut threads into the parts when being tightened. Do not use excessive force when tightening the self-tapping screws because
you may strip out the thread in the plastic. We recommended you stop tightening a screw when you feel some resistance.
• Ask your local hobby shop for any advice.
Please support your local hobby shop. We at XRAY Model Racing Cars support all local hobby dealers. Therefore we ask you, if at all possible, to
purchase XRAY products at your hobby dealer and give them your support like we do. If you have difficulty finding XRAY products, please check out
www.teamxray.com to get advice, or contact us via email at [e-mail], or contact the XRAY distributor in your country.

3
SYMBOLS USED
TOOLS REQUIRED
INCLUDED
EQUIPMENT REQUIRED
INCLUDED IN #389101
Hobby Knife Side Cutters Needlenose Pliers Curved Scissors Hole Reamer
2x
Self-tapping screws cut threads into the parts when being tightened. Excessive force may permanently damage
parts when tightening screws. It is recommended to stop tightening when the part is attached or when some
resistance is felt after the threaded portion enters the plastic.
Overtightened
CORRECT WRONG
The threads are stripped.
Micro Servo
Receiver
Transmitter Micro Motor 6-Cell Micro
Battery Pack
Battery ChargerTransmitter
Batteries
Micro Speed
Controller
CA Glue Lexan Paint
(Typically AA type) (Ni-MH recommended)
Driveshaft Assembly Tool Hex Hub Assembly Tool
Assemble as
many times
as specified
(here twice)
Cut off
remaining
material
Cut off
remaining
material from all
plastic parts.
Cut off
shadded
portion
Ensure smooth
non-binding
movement
Apply instant
glue
Pivot ball
type used
Pay attention
here
Assemble in
the specified
order
Assemble left
and right
sides the
same way
Part bags
used
True-to-scale
diagram
Car
orientation
Tighten screw
gently
Phillips Screwdriver 1.5mm Allen Wrench

4
1. FRONT DIFFERENTIAL
385531
960025
385060
385002
BAG
385002
930407
385095
930020
385035
930812 385060
930610
385531
970040
385002
930025
385002
907270
385002 COMPOSITE ADJUSTABLE BALL DIFFERENTIAL
385035 BEVELED DIFF. GEAR FOR BALL DIFF.
385060 GEARBOX CASE
385095 BALL DIFF D - WASHER (2)
385531 MAIN DRIVESHAFT PINION GEAR & COLLAR M18T, M18 PRO
907270 SCREW PHILLIPS M2.5x20 (10)
930020 BALL STEEL 2.4MM (24)
930025 BALL-BEARING AXIAL 2.5x5.4x0.8
930407 BALL-BEARING MR74ZZ 4x7x2.5 (2)
930610 BALL-BEARING MR106ZZ 6x10x3 (2)
930812 BALL-BEARING MR128ZZ 8x12x3.5 (2)
970040 O-RING 4x1 (10)
960025 NUT M2.5 (10)

5
1. 2. 3.
VERY IMPORTANT
DETAIL
ALIGN FLAT SPOTS
ALIGN FLAT
SPOTS
CUT OFF
FACTORY PRE-ASSEMBLED
DIFFERENTIAL BREAK-IN AND ADJUSTMENT:
The ball differentials in the M18 PRO comes pre-built from the factory, but you must still
perform a proper break-in on them in order to have them perform properly and give long
life. The key is to gradually tighten the diff to break it in properly and obtain the correct
tightness. DO NOT overtighten the diff initially or damage will result.
When initially tightening the diff, the screw should be tightened enough so that diff cannot be rotated
while holding both
When breaking in the diff, the balls create a groove in the diff rings; this is normal and essential for proper
operation. If you overtighten the diff initially, the balls will mar the surface of the rings (and damage the parts)
instead of creating a proper groove in the rings.
Adjusting the differentials is easy to do. Tighten the diff until you feel some resistance; you do not need to make large adjustments - 1/16 or 1/8 of a
turn will make a noticeable change in diff tightness.
Reassemble the car, run it for a few minutes, and then tighten each diff a little bit. Repeat this several times to break in the diff and set the correct
tightness.
930020
B 2.4
930407
BB 4x7x2.5
907270
2.5x20
960025
N M2.5
930025
BA 2.5x0.8
930812
BB 8x12x3.5

6
4. 5. 6.
ASSEMBLED VIEW
DETAIL
ASSEMBLED VIEW
CUT OFF
NOTE
ORIENTATION
ADD THIN LAYER OF GREASE TO INTERNAL GEARS. APPLY THIN LAYER OF GREASE ON CASE EDGES
(WHERE THEY CONNECT) TO SEAL OUT DUST/DIRT.
WIPE AWAY EXCESS GREASE
930610
BB 6x10x3
970040
O 4x1

7
2. REAR DIFFERENTIAL
BAG 385002 COMPOSITE ADJUSTABLE BALL DIFFERENTIAL
385035 BEVELED DIFF. GEAR FOR BALL DIFF.
385060 GEARBOX CASE
385095 BALL DIFF D - WASHER (2)
385531 MAIN DRIVESHAFT PINION GEAR & COLLAR M18T, M18 PRO
385736 SPUR GEAR 36T/48
385742 SPUR GEAR 42T/48
907270 SCREW PHILLIPS M2.5x20 (10)
930020 BALL STEEL 2.4MM (24)
930025 BALL-BEARING AXIAL 2.5x5.4x0.8
930407 BALL-BEARING MR74ZZ 4x7x2.5 (2)
930610 BALL-BEARING MR106ZZ 6x10x3 (2)
930812 BALL-BEARING MR128ZZ 8x12x3.5 (2)
970040 O-RING 4x1 (10)
960025 NUT M2.5 (10)
385531
960025
385060
385002
385002
930407
385095
930020
385035
930812 385060
930610
385736
970040
385002
930025
385002
907270
385742

8
1. 2. 3.
VERY IMPORTANT
DETAIL
ALIGN FLAT SPOTS
ALIGN FLAT
SPOTS
CUT OFF
FACTORY PRE-ASSEMBLED
DIFFERENTIAL BREAK-IN AND ADJUSTMENT:
The ball differentials in the M18 PRO comes pre-built from the factory, but you must still
perform a proper break-in on them in order to have them perform properly and give long
life. The key is to gradually tighten the diff to break it in properly and obtain the correct
tightness. DO NOT overtighten the diff initially or damage will result.
When initially tightening the diff, the screw should be tightened enough so that diff cannot be rotated
while holding both outdrives.
When breaking in the diff, the balls create a groove in the diff rings; this is normal and essential for proper
operation. If you overtighten the diff initially, the balls will mar the surface of the rings (and damage the parts)
instead of creating a proper groove in the rings.
Adjusting the differentials is easy to do. Tighten the diff until you feel some resistance; you do not need to make large adjustments - 1/16 or 1/8 of a
turn will make a noticeable change in diff tightness.
Reassemble the car, run it for a few minutes, and then tighten each diff a little bit. Repeat this several times to break in the diff and set the correct
tightness.
930020
B 2.4
930407
BB 4x7x2.5
907270
2.5x20
960025
N M2.5 930812
BB 8x12x3.5
930025
BA 2.5x0.8

9
4. 5 6
ASSEMBLED VIEW
ASSEMBLED VIEW
DETAIL
CUT OFF
NOTE
ORIENTATION
FOR INITIAL
ASSEMBLY USE
THE LARGER 42T
SPUR GEAR
ADD THIN LAYER OF GREASE TO INTERNAL GEARS
(NOT SPUR GEAR).
APPLY THIN LAYER OF GREASE ON CASE EDGES
(WHERE THEY CONNECT) TO SEAL OUT DUST/DIRT.
WIPE AWAY EXCESS GREASE.
36T SPUR GEAR WORKS WELL WITH 180-SIZE
MOTORS.
42T SPUR GEAR RECOMMENDED FOR MODIFIED
BRUSHED OR BRUSHLESS MOTORS.
930610
BB 6x10x3
970040
O 4x1

10
3. REAR SUSPENSION
REMAINING PIVOT BALLS ARE USED IN LATER ASSEMBLY SECTIONS
BAG 381116 MICRO 6-CELL GRAPHITE CHASSIS - CNC MACHINED
382101 SET OF SUSPENSION ARMS, LOWER + UPPER (2+1+1) - HARD
382200 COMPOSITE SUSPENSION BLOCK (2)
383220 SET OF REAR LINKAGES 2.5° TOE-IN (2)
385202 COMPOSITE DRIVE SHAFT FOR HEX ADAPTER - SET (2)
386110 COMPOSITE BATTERY HOLDER SET
387400 SET OF COMPOSITE PIVOT BALLS
901304 HEX SCREW SB M3x4 (10)
905206 SCREW PHILLIPS 2.2x6 (10)
905208 SCREW PHILLIPS 2.2x8 (10)
905214 SCREW PHILLIPS 2.2x14 (10)
906258 SCREW PHILLIPS FH 2.5x8 (10)
906262 SCREW PHILLIPS FH 2.5x12 (10)
930610 BALL-BEARING MR106ZZ 6x10x3 (2)
981208 PIN 2x8 (10)
906258
905206
906262
930610
905214
385202
382200
387400
382101
905206
905262
386110
930610
385202
981208
381116
383220
387400
905208
382101
901304
387400
387400
TO PROTECT AND SEAL EDGES OF
GRAPHITE PARTS, SAND EDGES
SMOOTH AND THEN APPLY CA GLUE.

11
1. 2. 3.
CHECK
RL
SAME
LENGTH
NOTE ORIENTATION OF
ALL PIVOT BALLS
LOWER ARM
LOWER ARM
0.9mm 0.9mm
DOWNSTOP SCREWS MUST BE ADJUSTED ON EQUALLY LEFT
AND RIGHT SIDES.
MORE PROTRUSION REDUCES SUSPENSION TRAVEL; LESS
PROTRUSION INCREASES SUSPENSION TRAVEL.
981208
P 2x8
A B 901304
SB M3x4

12
4. 5. 6.
➊
➋
NOTE ORIENTATION
OF ALL PIVOT BALLS
UPPER ARM
UPPER ARM ALIGN TAB AND SLOT
BEFORE TIGHTENING
SCREW
TIGHTEN SCREW UNTIL ALL PARTS ARE TOGETHER AND
THEN TIGHTEN CAREFULLY WITH TOOL - FOLLOW „TIP“
TOOL INCLUDED
IN BAG 06
AB 930610
BB 6x10x3
905214
2.2x14

13
7. 8. 9.
TIGHTEN
GENTLY
TIGHTEN
GENTLY
TIGHTEN
GENTLY
➊
➋
MAKE SURE ARMS
MOVE FREELY
IF SUSPENSION ARMS BIND AFTER ASSEMBLY,
LOOSEN SCREWS VERY SLIGHTLY.
905206
2.2x6
905262
2.5x12
C

14
10. 11. 12.
ASSEMBLED VIEW
ASSEMBLED VIEW
MAKE SURE ARMS
MOVE FREELY
ENSURE THAT THE PINS ON THE BOTTOM
OF THE DIFF CASE FIT INTO THE SLOTS IN
THE CHASSIS.
IF SUSPENSION ARMS BIND AFTER
ASSEMBLY, LOOSEN SCREWS VERY SLIGHTLY.
FOR ALL INFO
SEE PAGE 10
905208
2.2x8
906262
2.5x12
906258
2.5x8

15
4. FRONT SUSPENSION
BAG
382101 SET OF SUSPENSION ARMS, LOWER + UPPER (2+1+1) - HARD
382107 SET OF SUSPENSION ARMS 6° CASTER - HARD (2)
382200 COMPOSITE SUSPENSION BLOCK (2)
383200 SET OF LINKAGES + BALL JOINTS
385202 COMPOSITE DRIVE SHAFT FOR HEX ADAPTER - SET (2)
385512 ALU MAIN DRIVESHAFT - SILVER
387400 SET OF COMPOSITE PIVOT BALLS
901304 HEX SCREW SB M3x4 (10)
905206 SCREW PHILLIPS 2.2x6 (10)
905210 SCREW PHILLIPS 2.2x10 (10)
905214 SCREW PHILLIPS 2.2x14 (10)
905262 SCREW PHILLIPS 2.5x12 (10)
906262 SCREW PHILLIPS FH 2.5x12 (10)
930610 BALL-BEARING MR106ZZ 6x10x3 (2)
981208 PIN 2x8 (10)
382610
387400
387400
382101
383200
383200
387400
905210
385202
905206
905210
383200
387400
383200
906262
905214
385202
930610
382200
930610
981208
905262
387400
901304
905206
REMAINING PIVOT BALLS ARE USED IN LATER ASSEMBLY SECTIONS
387400
382107
385512

16
1. 2. 3.
CHECK
RL
SAME
LENGTH
NOTE ORIENTATION
OF ALL PIVOT BALLS
LOWER ARM
LOWER ARM
UPPER ARM
UPPER ARM
NOTE ORIENTATION
OF ALL PIVOT BALLS
981208
P 2x8
AB

17
4. 5. 6.
➊
➋
NOTE ORIENTATION
OF ARMS
ALIGN TAB AND SLOT
BEFORE TIGHTENING
SCREW
➊
➋
TIGHTEN
GENTLY
TIGHTEN
GENTLY
0.9mm 0.9mm
TIGHTEN SCREW UNTIL ALL PARTS ARE TOGETHER AND
THEN TIGHTEN CAREFULLY WITH TOOL - FOLLOW „TIP“
TOOL INCLUDED
IN BAG 06
DOWNSTOP SCREWS MUST BE ADJUSTED ON
EQUALLY LEFT AND RIGHT SIDES.
MORE PROTRUSION REDUCES SUSPENSION TRAVEL;
LESS PROTRUSION INCREASES SUSPENSION TRAVEL.
IF SUSPENSION ARMS BIND
AFTER ASSEMBLY, LOOSEN
SCREWS VERY SLIGHTLY.
901304
SB M3x4
930610
BB 6x10x3
905214
2.2x14
905206
2.2x6
905262
2.5x12

18
7. 8. 9.
ASSEMBLED VIEW
56mm
TIGHTEN
GENTLY
TIGHTEN
GENTLY
C 905210
2.2x10
C 905210
2.2x10

19
10. 11.
ENSURE THAT THE PINS ON THE BOTTOM OF
THE DIFF CASE FIT INTO THE SLOTS IN THE
CHASSIS.
IF SUSPENSION ARMS BIND AFTER
ASSEMBLY, LOOSEN SCREWS VERY
SLIGHTLY.
906262
2.5x12

20
5. FRONT & REAR FINAL ASSEMBLY
BAG 381116 MICRO 6-CELL GRAPHITE CHASSIS - CNC MACHINED
381141 MICRO M18 GRAPHITE TOP DECK - CNC MACHINED
381200 LOWER FRONT BUMPER
381213 M18 UPPER HOLDER FOR BUMPER - GRAPHITE
381225 FOAM BUMPER - BLACK
381300 COMPOSITE BODY POSTS (4) + BODY CLIPS
388000 COMPOSITE SHOCK BODY SET (4)
389400 MICRO BODY CLIP (10)
906256 SCREW PHILLIPS FH 2.5x6 (10)
906258 SCREW PHILLIPS FH 2.5x8 (10)
971030 SILICONE O-RING 3x1.5 (10)
388000
381225
381213
381300
389400
388000
381200
906258
381141
906256
906256
381300
381116
906258
389400
971030