Team Losi Double-XT User manual

•
OWNER'S
MANUAL
Scan provided courtesy of vintagelosi.com
• Carefully read through all instructions to familiatize.yourself with th(, parts, construction, tur . .1 .5 lips,
and techniques outlined inthismanual. Being able to grasp theoverall design
of your Doubh .. ·XT racuig
truck before construction will ensurea smooth assembly.
• Take your time and pay close attention to detail. Keep this manual for future reference. ..
TEAM LOSIINC., CHINO, CA 91710 PIN 800-0061
MADE IN THE UNITED STATES OF AMERICA ,.......,
~

WELCOME DOUBLE-X OWNER!
Thank you for purchasing the Team Losi Double-XT. This kit represents the latest in 1/10 scale truck raci ng tec hn olog y.
Based on the Double-X off-road buggy which revolutionized the 1/10 scale market, the Double-XT is the result of intense
design
and development efforts by the Team Losi racing team and design staff. In its very first out ing at the 1994 NORR CA
National Championships, it took first place honors. This kit utilizes extraordinary design and construction that has made Tea m
Los1 famous world wide. The use of specialized materials, computer aided design (CAD), computer aid ed manufacturing
(CAM) and
fi nite element analysis (FEA stress analysis) is unequaled in the R/C racing world.
Before starting construction of your Double-XT, please take a moment to read through these instructions. This will
minimize building time and get you on the track sooner . Add itionally, we have included a tip section in the bac k of the manual
to help you tune your Double-XT for optimum performance.
Once again, thank you for choosing the Doub le-XT. Tea m Losi is racing to help you win.
TEAM LOSI
1. INTRODUCTION
DOUBLE-XT COMPLETED KIT DIMENSIONS
Length: 15 . 5"
Wheel base: 11"
Front Width: 12.5"
All dimensions at ride hei gh t.
NOTES & SYMBOLS USED
*Note: this is a common note. It is used to callattention
to specmc details
of a certain step in the assembly.
@ IMPORTANT NOTE: Even if you are familiar with
Team Losi kits, besure and
pay attention tothese notes. They
poi
nt out very important details about a certain step in the
assembly. Do not ignore these notes!
R:J This flag designates a performance tip. These tips
are
not necessary, but can improve the performance of your
Double-XT truck.
KIT/MANUAL ORGANIZATION
TheTeam Losi Double-XT is composed of different bags
marked A through H. Each bag conta ins all of the parts nec-
essarytocomplete a particular section of the Oouble-XTtruck.
Some
of these bags have su bassembly bags within them. It
is essential that you open only one bag at a time and follow
the correct sequence , otherwise you may face difficulties in
finding the right part. It is helpful
to reac;1 throu gh the instruc-
tions for an entire bag pr i or to starting assembly. Key num -
bers (in parenthesis) have been assigned to each part and
remain the
same throughout the manual. For your conve-
nience,an actual size hardware identification guide is included
with each step. To check a part, hold it against the si lhouette
Rear Width: 12.6" Height: 5. 5"
Weig ht will vary depending on accessories.
until the correct part is identified. In some cases extra hard-
wa re has been supplied to replace easily lost parts. Different
fits have beendesigned into plastic parts (i.e.press, net,loose).
To insure that parts are not lost during construction, it is rec-
ommended that you work over a towel or mat to prevent parts
from rolli
ng away.
IMPORTANT SAFETY NOTES
1. Select an area for assembly that is away from the
reach
of small children. The parts in the kitare small andcan
be swallowed
by children, causing choking and possible in-
ternal injury.
2. The shock fluid and greases supplied should be kept
out of children's reach. They were not intended for human
consumption!
3. Exercise care when using any hand tools, sharp in-
struments, and power tools during construction.
4. Carefully read all manufacturer's warnings and cau-
tions tor any glues or paints that may be used for assembly
purposes.
TOOLS REQUIRED
Team Losi has supplied all allen wrenches and a special
wrench that is needed for assembly and adjustments. T he
following common tools will also be required: Smallflatblade
screwdriver, needle nose pliers, regular pliers,scissors or other
body cutting/trimming tool. 3/ 16 ", 1/4 ", and 3/8" nut drivers
are optional.
/

RADIO/ELECTRICAL
A suggested radio layout is provided in this manual. Your high performance R/C center should be consulted
specifics on radio/electrical equipment.
HARDWARE IDENTIFICATION
When in question, use the hardware identification guide in each step. For screws, the prefix number designates the
screw size and number of threads per inch (i.e. 4-40 is #4 screw with 40 threads per inch of length). The fraction following
designates the length of the threads for caphead screws, and the overall length for flathead screws. Bearings and bushings
are referenced by the inside diameter x outside diameter. Shafts and pins are diameter x length. Washers are described by
inside diameter or the screw size that will pass through the inside diameter. 'E' clips are sized by the shaft diameter that they
are attached to.
MOTORS AND GEARING
Your Double-XT truck includes an 88 tooth, 48 pitch spur gear. The overall internal gearbox ratio is 2.61 :1. The external
pinion gear will determine your gear ratio. To figure out thefinal drive ratio first dividethe spur gear size bythe pinion gearsize.
Say you are using a 20 tooth pinion gear, you would divide 88 (spur gear size) by 20 (pinion gear size). For example:
(88 + 20 =4.4) So 4.4 is your external drive ratio. Now multiply the internal drive ratio (2.61) by the external drive ratio (4.4).
Forexample: (2.61 x
4.4 = 11.484) This tells you that by using a 20 tooth pinion and a 88 tooth spur gear , the final drive ratio
is 11.484:1.
Consult your high performance shop for recommendations to suit your racing style and class. Thechart below lists some
of the more common motor types and a recommended initial gearing for that motor. Ratios can be adjusted depending on
various track layouts, tire sizes, and battery types. q:j1 "i 1. ~ :
REC OM MENDED INITIAL GEA RING FOR CO M MO N MOTORS f ' ~ \
PINION Sf •· f' ifO
SPUR
22
1/J . " ( 88
{0 I Lftf
21
II . tfl 88
(0 .Ct1l
16
r-1 . tt&
88
Jtf,)))
12 turn modified 17
r~ . s t 88
J1 . 51 0
13 turn modified 18 }1
cS
88 (1..1'5"'1
14 turn modified 19 I
z. .1/.p 88
1
z..o S ~
15 turn modified
20
,,, 74
88 ; 1,4kc/
16 turn modified 21
It . IY
88
,o . Cfn
17 turn modified
22
/O . Y,(
88 I
o, 4 lf
18 turn modified
i~
I IJ , 7..1
~~
q , &)?;{.,
'1 : 71
TABLE OF CONTENTS
~ . 5<t 't
1. INTRODUCTION ............... .. .................... .. ...... i 3. BAG B ............................................
.. ... ................. .. 5-10
Completed Kit Dimensions .. .... .. .. .. ............ ... i 4. BAG C ..................................................................
11 -15
Notes & Symbols ........................................... i 5. BAG D ................................................................. 16-
21
Kit Manual Organization .. ................... .... .... ..
6. BAG E ... .. . .. ......... ... .. ... .. ... .. ... .. .... .. .. ... .. . ... ..... .. . ... 22-26
Important Safety Notes ............................... ..
7. BAG F ........ ... .. ....................... .. ...... .. .... .. . .. .......... 27 -30
Tools Required .............................................. 8. BAG G
.. .. ......... .. .. ........................ .. ........................... 31
Radio/Electrical ... .. .. .. .. ... .. .. . .. ...... ..... .. ...... .. .. ii
9. BAG H ................................................... .. ............ 32-34
Hardware Identification . .. ... .... .. ................. .. . ii
10. Glossary........................ .. ....................................... 35
Motors & Gearing .
.... .. ............ .. .. .. .. .. .... . .. .. .. . ii
11. Team Tips .... .. .. .. .. . .. . ... ................. .. ................... 36-37
2. BAGA .. ............... .... .. .. ................................ 1-4 12. Spare parts .......................................................
38 -40
Team L osi Is continually changing and Improving designs; therefore, the actual
part may appear slightly different than the Illustrated part. Illustrations of parts
and assemblies may be slightly distorted to enhance pertinent details.
ii

BAGA
Fig 1.
Step 1. Attach the front bulkhead (1 ) to the main
chassis (2) by
aligning the bottom hinge holes on the
bulkhead (1)
and the main chassis (2 ). Once the holes
ar e aligned, carefully tap the 1/8" lower bu l khead hinge
pin (3)
through both pieces until the hinge pin (3) is cen-
tered. * U
se the 1/8" hinge pin with the la r ge groove in
th e cente r.
• NOTE: The l ower hingepin fit is VERY TIGHT! Be
sure
th atthe holes are aligned and tap pin in to p la ce.
St ep 2. Secure the pin by threading a 2-56 x5/16"
button head screw (4 ) into the small hole in the top , rear
of the front bulkhead (1 ). Thread the screw (4) all the
way in.
Step 3. Attach the front chassis stiffener (5) to the
fr
ont bulkhead (1) by aligning the holes in the stiffener
(5) with the holes in the
top hinge of the bulkhead (1).
Secure by inserting the 1/8" upper bulkhead hinge pin
(6) through
both the bulkhead (1) and stiffener (5) * Use
th eshortest 1/8" h in ge pin wi thout a groove in the cente r.
* NOT E: The hi nge pin fit is ti ght ! Lightly tap the
hi ng e pin through bot h parts untilit is centered.
Step 4. Center the hinge pin (6 ) and attach an 1/8"
' E' clip (7) to each end of the hinge pin (6).
Fb When removing the front bulkhead for any rea-
son, the 2-56 x 5/16"
button head screw must be com -
pletely
remo v ed before removing t he lower hinge pin.
® @
Fig 2.
St ep 5. Insert a 3/8 " ball stud (8) into ea ch ofthe inside
ho les on the bottom of the shock tower (9). Mount the ball
studs (8) from the rear
as shown .
St ep 6. Insert a 4-40 x 7/8" cap head screw (10) from
th e rear, thr ou gh the third hole in on the top of the shock
tow er (9) on each side . Thread a top shock mount bushing
11) onto
each of the two screws (1 0) and tighten.
e IMPORTANT NOTE: Remove all flashing from the
bottom of t
he front shock tower. This will insure proper fit of
the front sh ock t ower to the front bulkhead.
,__ __ __,0-L_ _ _ ___J
0
1
~ U,__ O _ __ __.® @1)
Figu re 1
9
Figure 2

BAG A (Continued)
@
Fig 3.
St ep 7. Attach thefrontsho ck tower (9) to the front side
ofthe frontbulkhead (1) with four 4-40 x 3/8"cap head screws
(
12 ).
Step 8. Attach the front body mount { 13 ) to the front
side
of the front shock tower {9) withtwo 4-40 x 3/ 8" cap head
screws (12) as shown.
~10 ----------~o ~
@
Fig 4.
t ep 7. lnse a ont axle (14) into each of th' front
pindl (left (15 , right 6)] as shown. The hole in
th~
should line u · the hole in the spindle {15) , {16).
Qe p B AUaeh t! 1a rlgtitspindle { 16 ) toone of the spindle
carriers {17) by aligning the holes
in each and inserting a
3/32"x 1.050" hinge pin {18) through the spindle carri
er {17),
spindle (16),
and axle (14). Center the hinge pin {18) and
secure itwith two 3/32" 'E' clips
{19 ).
e IMPORTANT NOTE: There are two sizes of 'E'
clips
in th is assembly bag. Be sure to usethe small 'E' cli ps
on the 3/32" pins.
Step 9. With the hinge pin (18 ) still centered, thread a
5-40 set screw (20) into the back side of the axle {14) and
tighen.
Step 10. Repeatfor the left spindle {15)and thesecond
spi ndle carrier (17).
Figure 3
Fi
gure 4
2
18
17

BAG A (Continued)
® @
Fig 5.
Step 11 . Insert a 3/8" ball stud (8) into the top of each
sp 1ndle earner (17) and tighten. Insert a 4-40 mini lock nut
( 21 ) mto the hex area in each spindle (15), (1 6), thread a
3 1 1 ~ baUstud (22) in from the top and tighten.
e IMPORTANT NOTE: Do not over tighten the ball
sruds!
ID
Fig 6.
'
'
~
~
'
'
Figure 5
~ mc..__ _ _ _ m
Step 12. Attach the right spindle and carrier assembly to the right front suspension arm (24) as shown . Line up the
holes in the spindle carrier (17) with the holes in thefront arm (24), insert a 3/32"x 1.050" hinge pin (18) and attach a 3/32" 'E'
clip (19)
to both sides of the hinge pin (18).
8 IMPORTANT NOTE: There are two sizes of 'E' clips in this assembly bag. Be sure to use the small 'E' clips on the
3/
32 " pins.
Step 13 . Attach the arm (24) to the rightside of thefront bulkhead (1) by inserting the 1/8" innerfront hinge pin (25), from
the front, through the arm (24) and bulkhead (1).
Step 14. Insert a 1/8" 'E' clip (7) in the rear groove of each hinge pin (25).
Step 15. Slide the front hinge pin brace (26) over the front of both hinge pins (25). Be sure that the brace (26) is
installedcorrectly so that the 'E' clip grooves in both hinge pins (25) are exposed. Secure th~ brace by attaching a 1/8"'E' clip
(7) to the front of each hinge pin ( 25 ).
Step 16. Repeat steps 12 through 15 for leftside with the left suspension arm (23).
F igure 6 /
3

BAG A (Continued)
UU!J:'IIIIID
0
!l!ll llil!lji l!lllfl
Figure 7
Figure 7A
Fi g 7.
Step 17. Thread a plastic rod end (27) onto each end of a 2-1/2" turnbuckle (28 ). Tighten both rod ends (27) equallyuntil
the rod
is the same length as the rod in Fig. 7A. Make two camber link assemblies.
F ig 8.
Step 18. Place a "foam thing" (29) over each of the ballstuds on the spindle carriers (17) and the shock tower (9 ). Next,
attach one side
of the camber link assembly to the ba ll stud on the shock tower (9) and the otherside to the ball stud on the
spindle carrier (
17 ). Attach a camber link to both the left and right side.
RJ Try to mountall of the camber links so that the threads adjustthe same direction. This makes it much easier to make
adjustments later.
29
Figure 8
4

BAG B
Fig 9. @
Step 1. Place servo saver bottom (30) overservo saver
post ( 31 ) and slide servo saver bottom all of the way down.
Be sure that the hex in the servo saver post (31) is inserted
1nto the hex in the servo saver bottom (30).
Step 2. Slide the servo saver top (32) down over the
servo saver post (31) so that it rests against the servo saver
bottom (30). The arm on the servo saver top (32) and the
arm on the servo saver bottom (30} should point in opposite
directions.
Step 3. Slide the servo saverspring (33) over theservo
saver post (31) and push it into the recessed area. Install the
servosaverspring cap ( 34) and thread the 6-40 lock nut (35)
onto the threads of the servo saver post (31).
Step 4. Tighten the 6-40 lock nut (35) all of the way
down and then loosen it two full turns (i.e.360° x 2). This is a
good starting point for the adjustment. Once assembly is
complete,
if you wish , the servosavercan beadjustedti ghter
or looser.
Fig 1 0.
@ @
Step 5. Insert a 4-40 mini lock nut (21) into each of the
two hexareas in theservosaver bottom (30). Thread a 3/16"
ball stud (22) into each nut (21) and tighten. Insert a 4-40
mini lock nut (21) into the hex area in the servo saver top.
Thread a 3/16 " ball stud {22) into the nut (21) and tighten.
Step 7. Insert a 4-40 mini lock nut (21 ) into each of the
two hex areas in the steering idler arm (36). Thread a 3/16"
ball stud (22) into each nut (21) and tighten.
.•,. 0
p: n: IU IG
Fig 1 1.
Step 8. Thread a plastic rod end (27) onto each end of
a 2 1/4" turnbuckle (37). Tighten both rod ends (27) equally
until the completed tie rod is the same length as the one in
fi gure 11A. Make two tie rod assemblies.
Step 9. Thread a short plastic rod end (38) onto each
end ofthe 1-1/8" tu rnbuckle (39). Tighten both rod ends (38)
equally until the completed drag link is the same length as
the
one in figure 11A .
Figure 9
Figure
10
Figure 11
Fi gur e JJA
~ - T ·-~
@ 39
o~= lllllc ==tQ~ I ==-• .._E===:30
5

BAG B (t;ontlnueaJ
Flg. 12
Step 10 . Snap one end of the short drag link to the ri ght
ball stud ( 22) on the servo s aver bottom (3 0). Snap t he o ther
end to the left ball st ud on the steering i dler arm ( 36 ).
*NOTE: Be sure to snap the rod onto the correct ball
studs
as shown!
10 01
@ ®
Fig 13 .
Step 11 . Insert a 3/ 32 " x 3/16" bu shing (40) into the two
large holes in the bottom of the steering brace (41 ), cham -
fered end first. Insert the
other two bushings (40) into the
two holes in the main chassis (2).
*Note: Trim all flashing from th e bushings to ensu re
proper fi t.
Step 12. In sert a 3/32" x .930" hinge pin (42) through
the hole in
the steering idler arm (36) and position it as shown
in fig. 13A. Place the servo save r assembly and the steeri ng
idl er arm (36) into the b ushings ( 40 ) in the chassis ( 2) so th at
the installed drag link is in the front.
Step 13. Place the steering brace (41 ) on t op of the
servo
sa ver assemb ly and steering idler arm (36) be i ng sure
that the
bush i ngs (40) slide ov er the pins.
Step 14. Attach the steer i ng brace to the chassis (2)
using
two 4-40 x 3/8" cap head screws (12).
e IMPORT A NT NOTE: Tighten the two 4-40 screws
all the way and then back them off 1/8 of a turn. This will
keeptheposts on thechassis from "taking a set " if they should
twist at all.
RJ If y ou should ev er need to remove the small bush-
ings, the easiest
way to get them out is to slightlythread a 4-
40 screw in to them and pull th em out.
Figure 12
3&
Figure 13
Figure 13A
6
41

BAG B (Continued)
Fig 14.
Step 15. Snap one end of a completed tie rod to the idler arm (36). Snap the other end to the right side spindle (16).
Attach the othertie r
od assembly to the servo saverassembly and the le ft spindle (15).
R:; Once again, assure that all turnbuckles are mounted with the threads in the same direction for easier adjustment
later!
Fig 15.
*Note: If you do not have yourservo at this time, sk ip to
Bag C
and continue assembly. It is recommended that the
servo
be installed at this time since much of the front end is
bu il taroundthe servo and minor disassemblywill be requ ir ed
to insta ll it later.
e IMPORTANTNOTE: If the servo mounting instruc-
tions are notfollowed carefully,yourservo maybe damaged!
Step 16. Using a file
or a Dremel tool, trim the two lower
ears off
of your servo (not included) as shown in figure 15.
Be very careful totrim the co rre ct ears! Ifthe wrong ears are
trimmed, your servo will
not be able to be mounted unless
the servo case is replaced.
e IMPORTANT NOTE: It is not recommended that
you use cutters or a hobby knife to remove the servo ears.
Some cases are made
of very brittle material and damage to
yourservo case may result.
Figure 14
Figure 15
7