BEFORE YOU START
The XB8E is a high-competition, high-quality, 1/8 electric buggy 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 racing 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 XB8E, YOU MUST read through all of the
operating instructions and instruction manual and fully understand them to get
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 info@teamxray.com. 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
the maximum enjoyment and prevent unnecessary damage. Read carefully and
fully understand the instructions before beginning assembly.
Make sure you review this entire manual, download and use set-up book from the
web, and examine all details carefully. If for some reason you decide the XB8E is
not what you wanted or expected, do not continue any further. Your hobby dealer
cannot accept your XB8E 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.
XRAY Europe
K Vystavisku 6992
91101 Trenčín
Slovakia, EUROPE
Phone: 421-32-7401100
Fax: 421-32-7401109
E-mail: info@teamxray.com
XRAY USA
RC America, 2030 Century Center Blvd #15
Irving, TX 75062
USA
Phone: (800) 519-7221 * (214) 744-2400
Fax: (214) 744-2401
E-mail: xray@rcamerica.com
Failure to follow these instructions will be considered as abuse and/or neglect.
SAFETY PRECAUTIONS
Contains:
LEAD (CAS 7439-92-1) ANTIMONY (CAS 7440-36-0)
WARNING: This product contains a chemical known to the state of California to
cause cancer and birth defects or other reproductive harm.
CAUTION: CANCER HAZARD
Contains lead, a listed carcinogen. Lead is harmful if ingested. Wash thoroughly
after using. DO NOT use product while eating, drinking or using tobacco
products. May cause chronic effects to gastrointestinal tract, CNS, kidneys, and
blood. MAY CAUSE BIRTH DEFECTS.
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.
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 motor and speed controller, 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.
2
• 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.
IMPORTANT NOTES – ELECTRICAL
• Insulate any exposed electrical wiring (using heat shrink tubing or electrical
tape) to prevent dangerous short circuits. Take maximum care in wiring,
connecting and insulating cables. Make sure cables are always connected
securely. Check connectors for if they become loose. And if so, reconnect
them securely. Never use R/C models with damaged wires. A damaged wire
is extremely dangerous, and can cause short-circuits resulting in fire. Please
have wires repaired at your local hobby shop.
• Low battery power will result in loss of control. Loss of control can occur due to
a weak battery in either the transmitter or the receiver. Weak running battery
may also result in an out of control car if your car‘s receiver power is supplied
by the running battery. Stop operation immediately if the car starts to slow
down.
• When not using RC model, always disconnect and remove battery.
• Do not disassemble battery or cut battery cables. If the running battery shortcircuits, approximately 300W of electricity can be discharged, leading to fire
or burns. Never disassemble battery or cut battery cables.
• Use a recommended charger for the receiver and transmitter batteries
and follow the instructions correctly. Over-charging, incorrect charging, or
using inferior chargers can cause the batteries to become dangerously hot.
•
•
•
•
•
•
Recharge battery when necessary. Continual recharging may damage battery
and, in the worst case, could build up heat leading to fire. If battery becomes
extremely hot during recharging, please ask your local hobby shop for check
and/or repair and/or replacement.
Regularly check the charger for potential hazards such as damage to the
cable, plug, casing or other defects. Ensure that any damage is rectified
before using the charger again. Modifying the charger may cause short-circuit
or overcharging leading to a serious accident. Therefore do not modify the
charger.
Always unplug charger when recharging is finished.
Do not recharge battery while battery is still warm. After use, battery retains
heat. Wait until it cools down before charging.
Do not allow any metal part to short circuit the receiver batteries or other
electrical/electronic device on the model.
Immediately stop running if your RC model gets wet as may cause short circuit.
Please dispose of batteries responsibly. Never put batteries into fire.
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 info@teamxray.com, or contact the XRAY
distributor in your country.
WARRANTY
XRAY guarantees this model kit to be free from defects in both material and
workmanship within 30 days of purchase. The total monetary value under
warranty will in no case exceed the cost of the original kit purchased. This
warranty does not cover any components damaged by use or modification or
as a result of wear. Part or parts missing from this kit must be reported within
30 days of purchase. No part or parts will be sent under warranty without proof
of purchase. Should you find a defective or missing part, contact the local
distributor. Service and customer support will be provided through local hobby
store where you have purchased the kit, therefore make sure to purchase any
XRAY products at your local hobby store. This model racing car is considered
to be a high-performance racing vehicle. As such this vehicle will be used in
an extreme range of conditions and situations, all which may cause premature
wear or failure of any component. XRAY has no control over usage of vehicles
once they leave the dealer, therefore XRAY can only offer warranty against all
manufacturer‘s defects in materials, workmanship, and assembly at point of
sale and before use. No warranties are expressed or implied that cover damage
caused by what is considered normal use, or cover or imply how long any
model cars‘ components or electronic components will last before requiring
replacement.
Due to the high performance level of this model car you will need to periodically
maintain and replace consumable components. Any and all warranty coverage
will not cover replacement of any part or component damaged by neglect,
abuse, or improper or unreasonable use. This includes but is not limited to
damage from crashing, chemical and/or water damage, excessive moisture,
improper or no maintenance, or user modifications which compromise the
integrity of components. Warranty will not cover components that are considered
consumable on RC vehicles. XRAY does not pay nor refund shipping on any
component sent to XRAY or its distributors for warranty. XRAY reserves the right
to make the final determination of the warranty status of any component or part.
Limitations of Liability
XRAY makes no other warranties expressed or implied. XRAY shall not be liable
for any loss, injury or damages, whether direct, indirect, special, incidental, or
consequential, arising from the use, misuse, or abuse of this product and/or any
product or accessory required to operate this product. In no case shall XRAY‘s
liability excess the monetary value of this product.
Take adequate safety precautions prior to operating this model. You
are responsible for this model’s assembly and safe operation.
Disregard of the any of the above cautions may lead to accidents,
personal injury, or property damage. XRAY MODEL RACING CARS
assumes no responsibility for any injury, damage, or misuse of this
product during assembly or operation, nor any addictions that may
arise from the use of this product.
All rights reserved.
QUALITY CERTIFICATE
XRAY MODEL RACING CARS uses only the highest quality materials, the best
compounds for molded parts and the most sophisticated manufacturing processes
of TQM (Total Quality Management). We guarantee that all parts of a newlypurchased kit are manufactured with the highest regard to quality. However, due
to the many factors inherent in model racecar competition, we cannot guarantee
any parts once you start racing the car. Products which have been worn out,
abused, neglected or improperly operated will not be covered under warranty.
We wish you enjoyment of this high-quality and high-performance RC car and
wish you best success on the track!
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.
3
SYMBOLS USED
Part bags used
Assemble in the
specified order
➊ ➋ ➌
Cut off shaded
portion
Assemble left and
right sides the
same way
Assemble front
and rear the same
way
Pay attention
here
Cut off
remaining
material
Apply instant
glue
2x
L=R
Use special
tool
Assemble as
many times
as specified
(here twice)
Time
Use cleaner
or WD-40
Tighten screw
gently
CA
Apply oil
Apply grease
Apply
threadlock
Follow tip here
Follow Set-Up
Book
OIL
Ensure smooth
non-binding
movement
Use pliers
TOOLS REQUIRED
Phillips 5.0mm (HUDY TOOLS)
17mm Wheel Nut Tool
(HUDY #107570)
Special Tool for all turnbuckles,
nuts (HUDY #108090)
Cross Wrench
(HUDY #107581)
Snap Ring Pliers
(HUDY #189040)
Scissors
(HUDY #188990)
Body Reamer
(HUDY #107600)
or
(HUDY #107601)
Allen 1.5 / 2.0 / 2.5 / 3.0mm (HUDY TOOLS)
Ball Allen 2.5mm (HUDY TOOLS)
Arm Reamer 3mm/4mm (HUDY TOOLS)
Socket 5.0 / 5.5mm (HUDY TOOLS)
Side Cutters
(HUDY #189010)
Hobby Knife
Needle Nose Pliers
(HUDY #189020)
TOOLS & EQUIPMENT INCLUDED
Silicone Shock Oil
Silicone Diff Oil
Graphite Grease
(HUDY #106210)
To ensure that you always have access to the most
up-to-date version of the XRAY Set-up Book, XRAY
will now be offering only the digital online version
at our Web site at www.teamxray.com. By offering
this online version instead of including a hardcopy
printed version in kits, you will always be assured
of having the most current updated version.
EQUIPMENT REQUIRED
Transmitter
Receiver
Electric Motor
Pinion Gear
Speed Controller
LiPo Battery
Battery Charger
Threadlock
CA Glue
Transmitter Batteries
Tires & Wheels
Lexan™ Paint
Steering
Servo
Bearing Oil
4
XB8E TECH TIPS
TIP FRONT & REAR DIFF GEAR MESH ADJUSTMENT
Before filling in the differentials with oil we suggest that you first check gear mesh as below. If there is too much or too little diff side play, this may create non-optimal gear mesh between the diff gear and the pinion
drive gear. This is easily resolved by inserting 1 or 2 of the included thin shims behind a diff outdrive ball-bearing, depending on how much play there is.
THE LOCATION OF THE SHIM(S) DEPENDS ON WHETHER YOU ARE TRYING TO CLOSE OR OPEN THE GAP:
OPTION SHIM
INCLUDED SHIM
TO CLOSE A WIDE GAP
For easier gear mesh adjustments, OPTION S13 x 0.2
shims are used. These shims can be placed behind the
bearing which is quicker.
CLOSE A WIDE GAP
To close a wide gap:
add 1 or 2 shims against diff spur gear
To close a wide gap:
add 1 or 2 shims against diff
spur gear
insert shim(s) here
#962080 WASHER S 8 x 0.1 mm (10)
#962081 WASHER S 8 x 0.2 mm (10)
962080
#962130 WASHER
S 13 x 16 x 0.2 mm (10)
962081
S 8x0.1
#962131 WASHER
S 13x16x0.1 mm (10)
S 8x0.2
TO OPEN A NARROW GAP
OPEN A NARROW GAP
insert shim(s) here
To open a narrow gap:
add 1 or 2 shims on the other side
of the diff, away from spur gear
To open a narrow gap:
add 1 or 2 shims on the other side of the diff, away
from spur gear
TIP DRIVE SHAFT PINS SERVICING
To enjoy the longest possible lifespan of the drive shafts and diff outdrives, it is extremely important to properly service the drive shaft pins.
Inspect the pins after every 3 hours of run time. If the pins show any wear, replace them with new pins.
Do not use drive shafts
when the pins are worn.
Press out the worn pins.
TIP GRAPHITE PARTS PROTECTION
Protect all XB8
Graphite Parts:
• Front shock tower
• Rear shock tower
Press in new pins and
regularly inspect for wear.
For easy drive pin replacement use #106000
HUDY Drive Pin Replacement Tool.
To replace the worn pins use only
premium HUDY drive pins #106050.
Follow this tech tip to protect the graphite parts.
Fine sandpaper
Use fine sandpaper to sand
smooth the edges of all
graphite parts.
Apply CA glue to all edges of
the graphite parts.
TIP INSTALLING PIVOT BALLS INTO COMPOSITE BALL JOINTS
Place the pivot ball on the ball joint
and use a screw to tighten it to an
engine mount or some other part.
Tighten screw until pivot ball is tight
against block.
Lift ball joint until it snaps into place
over pivot ball. Ball joint should move
freely.
The finished joint.
Loosen and remove screw.
5
1. FRONT & REAR DIFFERENTIALS
355063
940816
964030
355020
971060
980212
355090
355030
971060
355080
903312
964060
940816
355046
OPTION
#355105 ACTIVE FRONT DIFF
355063
BAGS
35 5003
35 5020
35 5030
35 5046
35 5063
35 5080
35 5090
2x
940816
BB 8x16x5
• High-performance adjustable front Active Differential for improved speed & handling
• Fully adjustable on- and off-power performance using different internal segments and gears
• Improves diff action and increases traction
• Easy and consistent steering
XB8 FRONT/REAR DIFFERENTIAL 46T - SET
DIFFERENTIAL CASE
STEEL DIFF BEVEL & SATELLITE GEARS (2+4)
FRONT/REAR DIFF LARGE BEVEL GEAR 46T - HUDY STEEL
F/R DIFF OUTDRIVE ADAPTER - LIGHTW. - HUDY SPRING STEEL™ (2)
DIFF PIN (2)
DIFF GASKET (4)
F=R
90 3312
94 0816
96 4030
96 4060
97 1060
98 0212
HEX SCREW SFH M3x12 (10)
HIGH-SPEED BALL-BEARING 8x16x5 BLUE COVERED (2)
WASHER S 3.5x12x0.2 (10)
WASHER S 6x18x0.2 (10)
SILICONE O-RING 6x1.5 (10)
PIN 2x11.6 (10)
FRONT/REAR DIFF LARGE BEVEL GEAR
#355038
DIFF LARGE BEVEL GEAR 38T (OPTION) *
#355040
DIFF LARGE BEVEL GEAR 40T (OPTION) *
#355046
DIFF LARGE BEVEL GEAR 46T (STANDARD)
Graphite Grease
(HUDY #106210)
➏
* These OPTIONAL bevel gears must be used
with OPTIONAL #355110 bevel gear 12T
➎
➊
Graphite Grease
➋
(HUDY #106210)
➍
STEP ➎➏ DETAIL
964060
S 6x18x0.2
➌
971060
O 6x1.5
980212
P 2x11.6
Use HUDY Ball-Bearing
Grease or Oil for servicing:
#106220 - Standard
#106221 - Extra
#106222 - Premium
#106230 - Bearing Oil
➎
➏
DIFFERENTIAL GEARS
6
FRONT & REAR DIFFERENTIALS
2x
F=R
➌
940816
Graphite Grease
(HUDY #106210)
BB 8x16x5
➋
Graphite Grease
(HUDY #106210)
STEP ➎ DETAIL
➍
Use HUDY Ball-Bearing
Grease or Oil for servicing:
➊
964060
#106220 - Standard
#106221 - Extra
#106222 - Premium
#106230 - Bearing Oil
S 6x18x0.2
➎
971060
O 6x1.5
➏
980212
P 2x11.6
VERY IMPORTANT!
Use these silicone oils included in the kit for initial settings:
Front diff: 5000cSt / Rear diff: 2000cSt
INCORRECT
CORRECT
903312
OIL
Fill the differentials
with oil just above the
satellite gears.
SFH M3x12
IMPORTANT!
Do not overfill the differential.
If there is too much oil in the
differential, it may leak after
it cools down after use.
964030
S 3.5x12x0.2
To enure you have the same amount of oil from rebuild to rebuild, do the following:
#107865 HUDY Ultimate Digital Pocket Scale 300g±0.01g
OIL
Front diff:
DIFFERENTIAL OIL
Silicone oil 5000cSt
Fill just above the
satellite gears.
Rear diff:
Silicone oil 2 000cSt
Fill just above the
satellite gears.
42.1g
40g
OIL
40g + 2.1g = 42.1g
1. Put the diff (without oil) on the scale and
check the weight (approximately 40g).
OIL
Tighten the screws equally
2. Slowly pour oil into the diff and watch
the weight. Add 2.1g of oil into the diff. The
approximate weight of the diff+oil is 42.1g.
Finish tightening in this order
➊
➌
32.3~32.5 mm
➍
➋
After assembly the differentials should have a length of 32.3~32.5 mm
measured from the ends of the installed ball-bearings. If differentials are
longer, retighten the 4 screws holding the crown gears.
7
CENTER DIFFERENTIAL
355071
964060
940816
964030
971060
355090
980212
355020
355030
355080
971060
940816
355050
903312
355071
BAG
35 5012
35 5020
35 5030
35 5050
35 5071
35 5080
35 5090
CENTRAL DIFFERENTIAL - SET
DIFFERENTIAL CASE
STEEL DIFF BEVEL & SATELLITE GEARS (2+4)
CENTER DIFF SPUR GEAR 46T
CENTER DIFF OUTDRIVE ADAPTER - LIGHTWEIGHT - HUDY STEEL (2)
DIFF PIN (2)
DIFF GASKET (4)
90 3312
94 0816
96 4030
96 4060
97 1060
98 0212
HEX SCREW SFH M3x12 (10)
HIGH-SPEED BALL-BEARING 8x16x5 BLUE COVERED (2)
WASHER S 3.5x12x0.2 (10)
WASHER S 6x18x0.2 (10)
SILICONE O-RING 6x1.5 (10)
PIN 2x11.6 (10)
➏
940816
BB 8x16x5
CENTER DIFF SPUR GEAR
#355048 48T (OPTION)
#355049 47T (OPTION)
#355050 46T (STANDARD)
#355051 45T (OPTION)
#355052 44T (OPTION)
Graphite Grease
(HUDY #106210)
➍
➊
964060
Graphite Grease
(HUDY #106210)
➎
➋
S 6x18x0.2
STEP ➎ ➏ DETAIL
971060
O 6x1.5
980212
P 2x11.6
➌
Use HUDY Ball-Bearing
Grease or Oil for servicing:
#106220 - Standard
#106221 - Extra
#106222 - Premium
#106230 - Bearing Oil
➎
➏
DIFFERENTIAL GEARS
8
CENTER DIFFERENTIAL
➌
➋
Graphite Grease
(HUDY #106210)
940816
Graphite Grease
(HUDY #106210)
BB 8x16x5
➊
STEP ➎ DETAIL
Use HUDY Ball-Bearing
Grease or Oil for servicing:
➍
964060
#106220 - Standard
#106221 - Extra
#106222 - Premium
#106230 - Bearing Oil
➏
S 6x18x0.2
➎
971060
O 6x1.5
980212
P 2x11.6
VERY IMPORTANT!
Use the following silicone oil included in the kit for initial setting:
Center diff: 5000cSt
INCORRECT
CORRECT
903312
Do not overfill the differential.
If there is too much oil in the
differential, it may leak after
it cools down after use.
OIL
SFH M3x12
IMPORTANT!
Fill the differentials
with oil just above
the satellite gears.
964030
S 3.5x12x0.2
To enure you have the same amount of oil from rebuild to rebuild, do the following:
#107865 HUDY Ultimate Digital Pocket Scale 300g±0.01g
42.1g
40g
OIL
Center diff:
DIFFERENTIAL OIL
Silicone oil 5000cSt
Fill to just above the satellite gears.
40g + 2.1g = 42.1g
1. Put the diff (without oil) on the scale and
check the weight (approximately 40g).
OIL
Tighten the screws equally
2. Slowly pour oil into the diff and watch
the weight. Add 2.1g of oil into the diff. The
approximate weight of the diff+oil is 42.1g.
Finish tightening in this order
➊
➌
32.3~32.5 mm
➍
➋
After assembly the differential should have a length of 32.3~32.5 mm
measured from the ends of the installed ball-bearings. If differential is
longer, retighten the 4 screws holding the spur gear.
9
2. FRONT TRANSMISSION
980314
355425
SHORT
355472
901404
355416
355471
352005
355236
355114
940816
352005
940816
355003
FRONT DIFF
BAG
35 2005
35 5003
35 5114
35 5236
35 5416
35 5425
35 5471
XB8 DIFF BULKHEAD BLOCK SET FRONT/REAR
XB8 FRONT/REAR DIFFERENTIAL 46T - SET
BEVEL DRIVE GEAR 14T
CVD DRIVE SHAFT COUPLING - HUDY SPRING STEEL™
CENTRAL CVD SHAFT UNIVERSAL JOINT - HUDY SPRING STEEL™
FRONT CENTRAL CVD DRIVE SHAFT - HUDY SPRING STEEL™
DRIVE SHAFT LOCKING RING (2)
step 1
SHORT CVD DRIVE SHAFT
901404
SB 4x4
902312
35 5472
DRIVE SHAFT BOOT (2)
90 1404
90 2312
94 0816
98 0314
HEX SCREW SB M4x4 (10)
HEX SCREW SH M3x12 (10)
HIGH-SPEED BALL-BEARING 8x16x5 RUBBER SEALED (2)
PIN 3x14 (10)
step 2
➎
Push joint against gear to remove gap.
Tighten set screw onto gear flat spot.
➌
Follow the TECH TIP on page 5
for drive shaft pin servicing
➋
➊
Graphite Grease
(HUDY #106210)
902312
SH 3x12
➎
➍
The ring can be assembled by hand but
for easy disassembling, we recommend
using snap ring pliers (HUDY #189040)
NOTE
ORIENTATION
➌
STEP ➎ DETAIL
➎
➊
STEP ➍ DETAIL
Use HUDY Ball-Bearing
Grease or Oil for servicing:
940816
BB 8x16x5
980314
P 3x14
PIN
ASSEMBLED VIEW
BEFORE inserting the clip on the central CVD shaft joint, apply a small amount of
threadlock on the area where the clip goes.
#106220 - Standard
#106221 - Extra
#106222 - Premium
#106230 - Bearing Oil
➋
➍
AFTER inserting the clip on the central CVD shaft joint, turn the clip so that the slot is
90°from the pin. This will prevent the pin from opening the clip.
step 3
Follow the TECH TIP
on page 5 to properly
adjust the gear mesh.
DETAIL
Cut on both front
and rear bulkhead blocks
FRONT DIFF 5000 cSt
Graphite Grease
(HUDY #106210)
10
REAR TRANSMISSION
355625
LONG
355472
980314
901404
355471
355416
352005
355236
355114
940816
353096
352005
940816
902312
355003
REAR DIFF
BAG
35 2005
35 5003
35 3096
35 5114
35 5236
35 5416
35 5625
XB8 DIFF BULKHEAD BLOCK SET FRONT/REAR
XB8 FRONT/REAR DIFFERENTIAL 46T - SET
XB8 GRAPHITE REAR SHOCK TOWER - CNC MACHINED 3.5MM
BEVEL DRIVE GEAR 14T
CVD DRIVE SHAFT COUPLING - HUDY SPRING STEEL™
CENTRAL CVD SHAFT UNIVERSAL JOINT - HUDY SPRING STEEL™
REAR CENTRAL CVD DRIVE SHAFT - HUDY SPRING STEEL™
step 1
LONG CVD DRIVE SHAFT
901404
SB 4x4
➎
902312
35 5471
35 5472
DRIVE SHAFT LOCKING RING (2)
DRIVE SHAFT BOOT (2)
90 1404
90 2312
94 0816
98 0314
HEX SCREW SB M4x4 (10)
HEX SCREW SH M3x12 (10)
HIGH-SPEED BALL-BEARING 8x16x5 RUBBER SEALED (2)
PIN 3x14 (10)
step 2
Push joint against gear to remove gap.
Tighten set screw onto gear flat spot.
➌
Follow the TECH TIP on page 5
for drive shaft pin servicing
➋
➎
➊
Graphite Grease
(HUDY #106210)
902312
SH 3x12
➍
The ring can be assembled by hand but
for easy disassembling, we recommend
using snap ring pliers (HUDY #189040)
NOTE
ORIENTATION
➌
STEP ➍ DETAIL
940816
➊
Use HUDY Ball-Bearing
Grease or Oil for servicing:
PIN
ASSEMBLED VIEW
BB 8x16x5
BEFORE inserting the clip on the central CVD shaft joint, apply a small amount of
threadlock on the area where the clip goes.
980314
P 3x14
STEP ➎ DETAIL
➎
#106220 - Standard
#106221 - Extra
#106222 - Premium
#106230 - Bearing Oil
➋
➍
AFTER inserting the clip on the central CVD shaft joint, turn the clip so that the slot is
90°from the pin. This will prevent the pin from opening the clip.
DETAIL
Cut on both front
and rear
bulkhead blocks
step 3
Follow the TECH TIP
on page 5 to properly
adjust the gear mesh.
step 4
Follow the TECH TIP on page 5
to protect graphite parts
NOTE
ORIENTATION
REAR DIFF 2000 cSt
Graphite Grease
(HUDY #106210)
11
3. REAR SUSPENSION
909395
353325
352314
901408
353371
353117
357212
352314
902318
353317
903308
901305
352005
REAR ANTI-ROLL BARS
#353422
2.2mm (OPTION)
#353424
2.4mm (OPTION)
#353426
2.6mm (STANDARD)
#353428
2.8mm (OPTION)
#353430
3.0mm (OPTION)
#353432
3.2mm (OPTION)
901303
OPTION
# 353192 Composite Rear Mud Protector (L+R)
333450
352470
901312
352470
352460
BAG
12
33 3450
35 2005
35 2314
35 2460
35 2470
35 3117
35 3192
35 3317
35 3325
35 3371
35 3426
ANTI-ROLL BAR BALL JOINT 5.8 MM (2)
XB8 DIFF BULKHEAD BLOCK SET FRONT/REAR
COMPOSITE ECCENTRIC BUSHINGS - V2 (2)
PIVOT BALL 5.8 (10)
BALL JOINT 5.8 (8)
XB8 COMPOSITE REAR LOWER SUSPENSION ARM
XB8 COMPOSITE REAR MUD PROTECTOR (L+R)
XB8 ALU REAR LOWER SUSP. HOLDER - FRONT - SQUARE ADJ. ROLL-CENTER
XB8 ALU REAR LOWER SUSP. HOLDER - REAR - SQUARE ADJ. ROLL-CENTER
SET OF COMPOSITE LOWER ARM SHIMS
REAR ANTI-ROLL BAR 2.6MM
35 7212
LOWER INNER PIVOT PIN F+R (2)
90 1303
90 1305
90 1312
90 1408
90 2318
90 3308
90 9372
90 9395
HEX SCREW SB M3x3 (10)
HEX SCREW SB M3x5 (10)
HEX SCREW SB M3x12 (10)
HEX SCREW SB M4x8 (10)
HEX SCREW SH M3x18 (10)
HEX SCREW SFH M3x8 (10))
SCREW PHILLIPS SS 3.5x22 (10)
SCREW PHILLIPS SS 3.5x45 (10)
909372
REAR SUSPENSION
REAR ARM
Push the arm from both sides to create play
L=R
Check for free movement
➍
RR
➌
909395
SS 3.5x45
INITIAL SETTING
1
0.5
0
0.5
➊
1
4x8
➎
Composite eccentric bushings
2mm
909372
SS 3.5x22
➋
➌
901408
➊
RF
SB M4x8
➍
DOWNSTOP SETTING
INITIAL SETTING
L=R
353371
1
3.3mm
SHIM 4x10x2
0.5
0
0.5
1
Composite eccentric bushings
If the suspension arm does not move freely use a
HUDY Arm Reamer to resize the holes of the arms.
TOE-IN
ANTI-SQUAT
ROLL CENTER
DOWNSTOP
TRACK-WIDTH
All possible mounting
alternatives of eccentric bushings
(HUDY #107634)
ARM REAMER
ECCENTRIC BUSHINGS HAVE TWO DIFFERENT OFFSETS FROM THE CENTER.
Middle position = 0.5 mm or 0.5° from center
Outer position = 1mm or 1° from center
The new XRAY rear alu lower suspension holders provide even greater range of adjustment for the rear suspension. Using different combinations of eccentric bushings, fine adjustment of rear anti-squat, rear
toe-in, rear roll center, and rear track-width can be obtained. For more information about the influence of rear anti-squat, rear toe-in, rear roll center and rear track width on car handling, please refer to HUDY
Off-Road Set-up Book (#209099).
RR
ANTI-SQUAT
RF
(°)
RR
ROLL CENTER
RF
(mm)
RR
TRACK-WIDTH
RF
(mm)
RR
TOE-IN
RF
(°)
=3°
=0mm
=308
=3°
=4°
=1mm
=306
=4°
=2°
=-1mm
=310
=2°
The tables describe the amounts of rear anti-squat, rear toe-in, rear track-width change depending
on the combinations of eccentric bushings used with 0 and 1mm, 1° off set. The 0.5mm, 0.5° represent
the half change.
=2°
=4°
=3°
=5°
=2°
Example: 0(RR) - 0 (RF) = 3°
= 3°
=3°
=1°
=4°
=3°
0(RR) - 0.5 (RF) = 3.5°
= 3.5°
=5°
=1°
0(RR) - 1 (RF) = 4°
= 4°
=3°
13
REAR SUSPENSION
2x
L=R
1.5mm
6mm
901312
SB M3x12
Follow the TECH TIP on page 5 to
install the pivot balls
901303
L=R
SB M3x3
STEP ➍ DETAIL
-2~0mm
901305
SB M3x5
➍
902318
➋
SH M3x18
903308
SFH M3x8
3x3
➋
➌
3x18
➊
3x5
3x8
DETAIL
Step ➊
Loosen the 3x5 setscrew if
the anti-roll bar does not
turn freely
DETAIL
Step ➊ check for free movement
ANTI-ROLL BAR
14
4. REAR SUSPENSION
353521
353559
353521
353131
352657
960030
902310
902320
980263
903416
352234
980317
2x
L=R
351330
941319
353370
357331
960030
COMPOSITE REAR BODY POST - LONG
XB8 ALU REAR HUB MOUNTING PLATE - SWISS 7075 T6
ADJ. TURNBUCKLE M5 L/R 72 MM - HUDY SPRING STEEL™ (2)
BALL STUD 6.8MM WITH BACKSTOP L=8MM - M4x6 (2)
REAR UPPER INNER CAMBER LINK BALL JOINT - V3 (2)
MOUNTING BALL 6.8 (4)
XB8 COMPOSITE REAR UPRIGHT
SET OF COMPOSITE REAR HUB CARRIER SHIMS
REAR WING POSTS
COMPOSITE REAR WING MOUNT BRACE (2)
CVD DRIVE AXLE - HUDY SPRING STEEL™
CVD UNIVERSAL DRIVE SHAFT - HUDY SPRING STEEL™
L=R
SB M5x4
902318
355237
355211
940814
35 1330
35 2234
35 2633
35 2657
35 3131
35 3160
35 3352
35 3370
35 3521
35 3559
35 5211
35 5221
355221
353352
355250
901504
901504
960030
352633
353131
902314
BAG
353160
902318
35 5237
35 5250
35 7331
90 1504
90 2310
90 2314
90 2318
90 2320
90 3416
94 0814
94 1319
96 0030
CVD DRIVE SHAFT COUPLING - HUDY SPRING STEEL™
ALU WHEEL AXLE - BLACK COATED (2)
XB808 REAR LOWER OUTER PIVOT PIN SCREW 3MM (2)
HEX SCREW SB M5x4 (10)
HEX SCREW SH M3x10 (10)
HEX SCREW SH M3x14 (10)
HEX SCREW SH M3x18 (10)
HEX SCREW SH M3x20 (10)
HEX SCREW SFH M4x16 (10)
HIGH-SPEED BALL-BEARING 8x14x4 BLUE COVERED (2)
HIGH-SPEED BALL-BEARING 13x19x4 BLUE COVERED (2)
NUT M3 (10)
INITIAL SETTING
To tighten the setscrew you can
also use the HUDY 17mm Wheel
Nut Tool #107570
2.5x13
➋
➌
13x19x4
m
2.5m
➎
3x17
➐
941319
BB 13x19x4
980317 980263
➏
Graphite Grease
(HUDY #106210)
ASSEMBLED VIEW
Use HUDY Ball-Bearing
Grease or Oil for servicing:
➍
➍
➑
BB 8x14x4
L=R
8x14x4
OFFSET WHEEL AXLES
#355250 0mm (STANDARD)
#355251 +1mm (OPTION)
#355252 +2mm (OPTION)
Follow the TECH TIP on page
5 for drive shaft pin servicing
➊
➒
940814
98 0263 PIN 2.5x13 (10)
98 0317 PIN 3x17 (10)
#106220 - Standard
#106221 - Extra
#106222 - Premium
#106230 - Bearing Oil
Ensure that the rear upright moves freely.
If it does not move freely, use sandpaper
to thin both wheelbase adjustment shims.
L=R
Check for free
movement
Shims for
wheelbase
adjustment
P 2.5x13
P 3x17
960030
N M3
2mm
2mm
Do not overtighten the self-locking nut.
Overtightening may result in suspension binding.
903416
SFH M4x16
ARM REAMER
353370
(HUDY #107633)
INITIAL SETTING
If the rear upright does not move freely, use a HUDY Arm Reamer to resize the hole.
SHIM 3x9x2
15
REAR SUSPENSION
Follow the TECH TIP on page 5
to install the pivot balls
CAMBER
OIL
Follow the TECH TIP on page 5
to install the pivot balls
LEFT
THREAD
OIL
LEFT THREAD
RIGHT
THREAD
RIGHT THREAD
DETAIL
OIL
OIL
Use tools
to tighten as shown
NOTE ORIENTATION
NOTE ORIENTATION
Special Tool for all turnbuckles & nuts (HUDY #108090)
Left thread
Right thread
Right thread
47.3 mm
Left thread
47.3 mm
NOTE
ORIENTATION
INITIAL POSITIONS
ROLL CENTER
902318
SH M3x18
NOTE ORIENTATION
960030
N M3
INITIAL POSITIONS
353380
SHIM 4x7.5x1
OPTION shims from the Last Aid Bag can be
used for roll center adjustment.
#353380 - Alu shim 4x7.5x1mm
#353381 - Alu shim 4x7.5x2mm
353381
SHIM 4x7.5x2
For stiffer wing mounting use OPTIONAL
alu wing mount brace #353550.
3x14
902310
902314
3x18
Single Body Post
INITIAL SETTING
3x18
SH M3x10
SH M3x14
3x10
960030
N M3
3x14
3x20
INITIAL POSITIONS
902318
SH M3x18
902320
SH M3x20
REAR WING
16
R4 R3
F4 F3
R2 R1
F2 F1
Double Body Posts
OPTION SETTING
5. FRONT SUSPENSION
909372
352324
352314
901408
357212
353371
352314
902318
352323
909395
352117
901303
333450
901305
352470
901312
352470
352460
BAG
33 3450
35 2005
35 2117
35 2323
35 2324
35 2314
35 2460
35 2470
35 2494
35 3371
FRONT ANTI-ROLL BARS
#352492 2.2mm (OPTION)
#352494 2.4mm (STANDARD)
352005
903308
#352496 2.6mm (OPTION)
ANTI-ROLL BAR BALL JOINT 5.8 MM (2)
DIFF BULKHEAD BLOCK SET FRONT/REAR
XB8 COMPOSITE FRONT LOWER SUSPENSION ARM
ALU FRONT LOWER SUSP. HOLDER - FRONT - SQUARE ADJ. ROLL-CENTER - V2
ALU FRONT LOWER SUSP. HOLDER - REAR - SQUARE ADJ. ROLL-CENTER - V2
COMPOSITE SQUARE ADJ. ROLL-CENTER BUSHINGS - V2 (2)
PIVOT BALL 5.8 (10)
BALL JOINT 5.8 (8)
FRONT ANTI-ROLL BAR 2.4MM
SET OF COMPOSITE LOWER ARM SHIMS
35 7212
LOWER INNER PIVOT PIN F+R (2)
90 1303
90 1305
90 1312
90 1408
90 2318
90 3308
90 9372
90 9395
HEX SCREW SB M3x3 (10)
HEX SCREW SB M3x5 (10)
HEX SCREW SB M3x12 (10)
HEX SCREW SB M4x8 (10)
HEX SCREW SH M3x18 (10)
HEX SCREW SFH M3x8 (10))
SCREW PHILLIPS SS 3.5x22 (10)
SCREW PHILLIPS SS 3.5x45 (10)
17
FRONT SUSPENSION
DETAIL
FRONT ARM
DETAIL
353371
SHIM 4x10x2
L=R
Push the arm from both sides to create play
Check for free movement
➍
FR
➌
➊
INITIAL SETTING
909395
SS 3.5x45
1
0.5
0
0.5
➋
1
2mm
4x8
➎
Composite eccentric bushings
Use the shim from Bag 03
FF
➌
➊
➍
INITIAL POSITION
909372
SS 3.5x22
1
DOWNSTOP SETTING
901408
SB M4x8
L=R
0.5
0
0.5
1
Composite eccentric bushings
1.7mm
All possible mounting alternatives
of eccentric bushings
If the suspension arms do not move freely, use
a HUDY Arm Reamer resize the holes.
(HUDY #107634)
ARM REAMER
Eccentric bushings have two different offsets from the center.
Middle position = 0.5 mm or 0.5° from center
Outer position = 1mm or 1° from center
The new XRAY alu front lower suspension holders provide even greater range of adjustment for the front
suspension. Using different combinations of eccentric bushings, fine adjustment of front kick-up, roll center, and
front track-width can be obtained. For more information about the influence of kick-up, front track-width, and
roll centers on car handling, please refer to HUDY Off-Road Set-up Book (#209099).
FF
KICK UP
ROLL CENTER
DOWNSTOP
WHEELBASE
TRACK WIDTH
18
TRACK-WIDTH
FR
(mm)
FF
ROLL CENTER
FR
(mm)
=308
=1
=306
=0
=310
=-1
The tables below describe the amounts of kick-up, front track-width change depending on the combinations of
eccentric bushings used with 0 and 1mm, 1° off set. The 0.5mm, 0.5° represent the half change.
FRONT SUSPENSION
2x
L=R
1.5mm
6mm
901312
SB M3x12
Follow the TECH TIP on page 5 to
install the pivot balls
L=R
901303
STEP ➍ DETAIL
-2~0mm
SB M3x3
901305
SB M3x5
3x3
➍
➋
902318
SH M3x18
3x18
903308
SFH M3x8
➌
➊
3x5
3x8
DETAIL
Step ➊
Loosen the 3x5 setscrew if
the anti-roll bar does not
turn freely
DETAIL
Step ➊ check for free movement
ANTI-ROLL BAR
19
6. FRONT SUSPENSION
KING PIN PLATES
#352231 L+R 14° (STANDARD)
#352235 L+R 10° (OPTION)
#352237 L+R 6° (OPTION)
352231
352132
352623
352153
352153
352142
903416
353172
980263
355237
355221
352231
980317
940814
355211
941319
355250
901504
357252
357256
BAG
901504
35 2132
35 2142
35 2153
35 2231
35 2240
35 2623
35 3172
35 5211
35 5221
35 5237
35 5250
35 7250
2x
352240
357254
OPTION
#357253 Brass
Adjusting Nut M15x1
357250
XB8 FRONT UPPER ARM RIGHT
XB8 FRONT UPPER ARM LEFT
XB8 FRONT UPPER ARM BALL JOINT (L+R)
XB8 ALU STEERING KING PIN PLATE - SWISS 7075 T6 - L+R 14°
XB8 STEERING BLOCK
ADJ. TURNBUCKLE M5 L/R 28 MM - HUDY SPRING STEEL™ (2)
PIVOT BALL 11.0 (2)
CVD DRIVE AXLE - HUDY SPRING STEEL™
CVD UNIVERSAL DRIVE SHAFT - HUDY SPRING STEEL™
CVD DRIVE SHAFT COUPLING - HUDY SPRING STEEL™
ALU WHEEL AXLE - BLACK COATED (2)
STEEL PIVOT BALL 13.9 MM (2)
OFFSET WHEEL AXLES
#355250
0mm
(STANDARD)
#355251
+1mm (OPTION)
#355252
+2mm (OPTION)
35 7252
35 7253
35 7254
35 7256
ALU ADJUSTING NUT M15x1 (2)
BRASS ADJUSTING NUT M15x1 (2) (OPTION)
COMPOSITE BALL CUP 13.9 MM (2)
ALU SHIM 6x13x1 (2)
90 1504
90 3416
94 0814
94 1319
98 0263
98 0317
HEX SCREW SB M5x4 (10)
HEX SCREW SFH M4x16 (10)
HIGH-SPEED BALL-BEARING 8x14x4 BLUE COVERED (2)
HIGH-SPEED BALL-BEARING 13x19x4 BLUE COVERED (2)
PIN 2.5x13 (10)
PIN 3x17 (10)
L=R
SB M5x4
2.5x13
KING PIN PLATES
#352231 L+R 14° (STANDARD)
#352235 L+R 10° (OPTION)
#352237 L+R 6° (OPTION)
903416
4x16
➑
SFH M4x16
OFFSET WHEEL AXLES
#355250 0mm (STANDARD)
#355251 +1mm (OPTION)
#355252 +2mm (OPTION)
➐
BB 13x19x4
3x17
➏
8x14x4
➎
To tighten the setscrew you can also use the
HUDY 17mm Wheel Nut Tool #107570
940814
BB 8x14x4
m
2.5m
980317 980263
P 3x17
20
P 2.5x13
➊
13x19x4
➍
941319
➋
➌
Graphite Grease
(HUDY #106210)
➍
Use HUDY Ball-Bearing
Grease or Oil for servicing:
#106220 - Standard
#106221 - Extra
#106222 - Premium
#106230 - Bearing Oil
ASSEMBLED VIEW
Follow the TECH TIP on page 5
for drive shaft pin servicing
FRONT SUSPENSION
2x
L=R
Tighten composite hex nuts using
HUDY tool #107581
PIVOT BALLS MUST MOVE FREELY
During initial assembly, tighten each composite hex nut until the pivot ball starts to
bind, then loosen slightly. Verify that the pivot balls move freely.
OPTION
#357253 Brass Adjusting Nut M15x1
2x
IMPORTANT
Check that the pivot balls move freely after every run especially in dusty conditions.
L=R
357256
SHIM 6x13x1
1mm
HUDY Tool Allen 2.5mm
CAMBER
2x
L=R
RT
m
2.5m
mm
2.5
G
LON
SHO
CUTAWAY VIEW
mm
2.5
HUDY Tool Allen 2.5mm
DETAIL
22mm
HUDY Tool Allen Ball 2.5mm
102.3mm
Marked (L) = Marked (L)
2x
353380
SHIM 4x7.5x1
353381
SHIM 4x7.5x2
102.3mm
Marked (R) = Marked (R)
L=R
If the front upper arm does not move freely use a
HUDY Arm Reamer to resize the holes of the arms.
(HUDY #107634)
ARM REAMER
OPTION shims from the Last Aid Bag can be used for
Roll Center adjustment.
#353380 - Alu shim 4x7.5x1mm
#353381 - Alu shim 4x7.5x2mm
Apply WD-40 to protect against rust
ROLL CENTER
21
FRONT & REAR ASSEMBLY
OPTION
#353088 Short Rear Brace
960030
902316
353089
960030
351200
351200
903412
903312
BAG
903412
SFH M4x12
22
35 1109
35 1200
35 3088
35 3089
351109
XB8E ALU CHASSIS - SWISS 7075 T6 (3MM) - HARD COATED
FRONT & REAR BUMPER - V2
COMPOSITE REAR BRACE - V2 (OPTION)
COMPOSITE REAR BRACE - LONG
903412
90 2316
90 3312
90 3412
96 0030
HEX SCREW SH M3x16 (10)
HEX SCREW SFH M3x12 (10)
HEX SCREW SFH M4x12 (10)
NUT M3 (10)
FRONT & REAR ASSEMBLY
INITIAL SETTING
Add for extra stiffness
(use from Last Aid Bag)
902316
SH M3x16
3x16
OPTION
#358088 Short Rear Brace
REAR BRACES
TRACK TYPE
FLAT
MEDIUM JUMPS
LARGE JUMPS
Long Brace
Short Brace
903312
SFH M3x12
960030
N M3
Screw from the Last Aid Bag can be
used for extra stiffeness adjustment
3x12
903412
SFH M4x12
DETAIL
23
7. STEERING
351301
903306
903310
903310
902314
351347
940610
352503
352088
902310
352513
960030
352576
352096
902312
960030
903312
960030
352513
352578
352381
352314
352381
902308
303122
357220
352652
352664
352333
903320
960030
303123
352652
352513
352611
352503
352666
352503
903320
970121
940610
352503
903410
BAG
24
30 3122
30 3123
35 1301
35 1347
35 2088
35 2096
35 2314
35 2333
35 2381
35 2503
35 2513
35 2576
35 2578
35 2611
35 2652
ALU SHIM 3x6x1.0MM (10)
ALU SHIM 3x6x2.0MM (10)
BODY POSTS
XB8 GRAPHITE UPPER PLATE
COMPOSITE FRONT BRACE
XB8 GRAPHITE FRONT SHOCK TOWER - CNC MACHINED 4 MM
COMPOSITE SQUARE ADJ. ROLL-CENTER BUSHINGS - V2 (2)
XB8 ALU FRONT UPPER ARM HOLDER - SWISS 7075 T6 (6MM)
XB8 CASTER CLIPS (2)
XB8 SERVO SAVER COMPLETE SET
XB8 COMPOSITE SERVO SAVER
STEERING PLATE BUSHING (2)
XB8 ALU STEERING PLATE - SWISS 7075 T6
ADJ. TURNBUCKLE M4 L/R 52.5 MM - HUDY SPRING STEEL (2)
BALL STUD 6.8MM (4)
35 2664
35 2666
35 7220
90 2308
90 2310
90 2312
90 2314
90 3306
90 3310
90 3312
90 3320
90 3410
94 0610
96 0030
97 0121
COMPOSITE STEERING BALL JOINT 6.8MM - V3 (2)
COMPOSITE RELIEF STEERING BALL JOINT 6.8MM (2)
FRONT UPPER PIVOT PIN (2)
HEX SCREW SH M3x8 (10)
HEX SCREW SH M3x10 (10)
HEX SCREW SH M3x12 (10)
HEX SCREW SH M3x14 (10)
HEX SCREW SFH M3x6 (10)
HEX SCREW SFH M3x10 (10)
HEX SCREW SFH M3x12 (10)
HEX SCREW SFH M3x20 (10)
HEX SCREW SFH M4x10 (10)
HIGH-SPEED BALL-BEARING 6x10x3 BLUE COVERED (2)
NUT M3 (10)
O-RING 12.1 x 1.6 (10)
STEERING
step 2
HUDY Tool Allen 3.0mm
SH M3x8
3.0mm
902308
step 1
step 3
For servicing use
Bearing Oil (HUDY #106230)
940610
BB 6x10x3
3x8
970121
O 12.1x1.6
3x8
INITIAL PRELOAD SETTING
903410
SFH M4x10
4~5mm
NOTE ORIENTATION
4x10
SERVO SAVER
902310
3x10
3x10
ASSEMBLED
VIEW
3x10 3x14
3x6
SH M3x10
3x6
Composite eccentric bushings
902314
903312
SFH M3x12
SH M3x14
1
903306
SFH M3x6
903310
SFH M3x10
0.5
0
INITIAL SETTINGS
0.5
1
3x10
NOTE
ORIENTATION
All possible mounting
alternatives of eccentric bushings
NOTE
ORIENTATION
960030
N M3
INITIAL POSITION
3x12
ROLL CENTER
Follow the TECH TIP on page 5
to install the pivot balls
Follow the TECH TIP on page 5
to install the pivot balls
NOTE
ORIENTATION
NOTE
ORIENTATION
RIGHT THREAD
LEFT THREAD
RIGHT THREAD
Right thread
LEFT THREAD
32.2 mm
Left thread
Left thread
32.2 mm
Right thread
25
STEERING
IMPORTANT
Check free movement of the front upper arm after every run especially
in dusty conditions. In case of binding resize the front upper arm and/or
clean the eccentric bushings.
902312
SH M3x12
2.0mm
1.0mm
1.0mm
INITIAL POSITION
NOTE
ORIENTATION
All possible mounting
alternatives of eccentric bushings
INITIAL SETTINGS
1
0.5
0
0.5
DETAIL
1
Composite eccentric bushings
Cutaway view
Shock Tower
NOTE
ORIENTATION
CASTER
CASTE
R
LOWER SHIM (Behind arm)
UPPER CLIP
(Behind arm)
2mm
0
4mm
24º
21º
3mm
25.5º
22.5º
2mm
27º
24º
1mm
28.5º
25.5º
0
30º
27º
UPPER CLIP
Behind arm
LOWER SHIM
ROLL CENTER
CASTER
Behind arm
2x
INITIAL POSITION
L=R
303122
SHIM 3x6x1
303123
SHIM 3x6x2
NOTE ORIENTATION
Adjustment block towards outside
903320
SFH M3x20
2.0mm
960030
N M3
ACKERMANN
BUMP STEER
TOE-IN
26
1.0mm
NOTE ORIENTATION
Adjustment block towards outside
Check for free
movement
Check for free
movement
8. CENTER DIFF & MOTOR
Motor
(not included)
960030
358783
351158
908314
355712-17
(not included)
903310
961032
908312
902330
352290
960030
358784
903308
903412
903314
354053
355012
(Center Diff)
354011
354011
351158
903310
BAG
908312
SCH M3x12
35 1158
XB8 CHASSIS SIDE GUARDS L+R W/OUT RIB
35 2290
COMPOSITE BUSHING FOR ALU STEERING BLOCK (4)
35 4011
CENTER DIFF MOUNTING PLATE SET - HIGHER
35 4053
XB9E GRAPHITE CENTER DIFF MOUNTING PLATE
35 5712~17 XB808E 12~17T PINION GEAR (OPTION)
35 8783
XB9E ALU MOTOR MOUNT PLATE
35 8784
XB8E ALU MOTOR MOUNT
90 2330
HEX SCREW SH M3x30 (10)
903412
903314
90 3308
90 3310
90 3314
90 3412
90 8312
90 8314
96 0030
96 1032
HEX SCREW SFH M3x8 (10)
HEX SCREW SFH M3x10 (10)
HEX SCREW SFH M3x14 (10)
HEX SCREW SFH M4x12 (10)
HEX SCREW SOCKET HEAD CAP M3x12 (10)
HEX SCREW SOCKET HEAD CAP M3x14 (10)
NUT M3 (10)
WASHER S 3.2 (10)
The motor mount is designed for 3mm
motor screws. In case your motor
requires larger diameter screws please
drill the holes in the motor mount
accordingly.
PINION
355712-17
(not included)
27
CENTER DIFF & MOTOR
NOTE ORIENTATION
NOTE ORIENTATION
NOTE ORIENTATION
902330
SH M3x30
903308
SFH M3x8
903412
SFH M4x12
28
CENTER DIFF & MOTOR
908314
SCH M3x14
Gear mesh adjustment
961032
S 3.2
Adjust gear mesh so there is minimal play between the gears.
Too tight gear mesh will put excessive strain on all parts and damage the parts.
Too loose gear mesh may result in stripped gears.
903310
SFH M3x10
903314
SFH M3x14
3x14
3x10
960030
3x10
3x10
N M3
903310
SFH M3x10
903314
SFH M3x14
960030
N M3
3x14
3x10
3x10
29
10. RADIO CASE
902312
902308
Speed Controller
(not included)
Servo Screw
(not included)
356200
Servo Grommet
(not included)
306310
907206
LiPo Battery Pack
(not included)
352460
Steering Servo
(not included)
902314
352670
902308
902312
336000
302610
352670
356118
960030
356120
Receiver
(not included)
960040
356151
356194
903412
356160
336000
903410
356151
BAG
10
30 2610
30 6310
33 6000
33 6060
35 2460
35 2670
35 6118
35 6120
35 6151
35 6160
35 6194
35 6200
ADJ. TURNBUCKLE L/R 40 MM - HUDY SPRING STEEL (2)
ANTENNA TUBE (2)
COMPOSITE RECEIVER CASE - V2
RECEIVER SWITCH - SET (OPTION)
PIVOT BALL 5.8 (10)
SERVO BALL JOINT 5.8MM (4)
XB9E GRAPHITE RECEIVER CASE TOP PLATE
STEERING SERVO MOUNT - SET
XB9E COMPOSITE BATTERY PLATE
VELCRO BATTERY STRAP 20x300MM (2)
XB9E ALU MOUNT FOR RECEIVER BOX
BRAKE/THROTTLE ARMS & STEERING SERVO ARMS - SET
903416
38 9135
90 2308
90 2312
90 2314
90 3410
90 3412
90 3416
90 7206
96 0030
96 0040
CONNECTING CABLE RECEIVER/BATT. PACK (OPTION)
HEX SCREW SH M3x8 (10)
HEX SCREW SH M3x12 (10)
HEX SCREW SH M3x14 (10)
HEX SCREW SFH M4x10 (10)
HEX SCREW SFH M4x12 (10)
HEX SCREW SFH M4x16 (10)
SCREW PHILLIPS 2x6 (10)
NUT M3 (10)
NUT M4 (10)
Follow the TECH TIP on page
5 to install the pivot balls
LEFT
THREAD
902312
NOTE
ORIENTATION
SH M3x12
RIGHT
THREAD
Use appropriate servo arm:
K - (23T)
RIGHT THREAD
21 mm
LEFT THREAD
The length of the linkages varies according to the type of servo.
30
H - (24T)
F - (25T)
HUDY ALU SERVO HORNS
#293501 23T KO Propo, Airtronics, JR, Sanwa (OPTION)
#293502 24T Hitec
(OPTION)
#293503 25T Futaba
(OPTION)
RADIO CASE
Servo Screw
(not included)
902312
SH M3x12
902308
SH M3x8
907206
2x6
Receiver
(not included)
Antenna
If the receiver box has 2 different-size openings
for cable entry (narrow and wider), cut away
the tab for the appropriate opening to allow the
cables to fit properly.
902308
SH M3x8
31
RADIO CASE
902314
SH M3x14
903410
SFH M4x10
960030
N M3
TIE STRAP
(not included)
SPEED CONTROLLER
(not included)
DOUBLE-SIDED TAPE
(not included)
903410
SFH M4x10
903416
SFH M4x16
4x10
960040
4x16
N M4
BATTERY
(not included)
VELCRO BATTERY STRAP
Cut the foam as needed to fill in space between
the batteries and holder.
32
11. SHOCK ABSORBERS
358042
358041
358042
358032
358033
358040
10 holes/ø1.1mm
8 holes/ø1.2mm
358263
358084
358053
960026
8 holes/ø1.3mm
6 holes/ø1.2mm
358224
358162
OPTION
#358054 XB8 Alu Shock Cap Nut With
Vent Hole - Black Coated (2)
6 holes/ø1.4mm
6 holes/ø1.3mm
970100
358019
358142
358124
970180
FRONT LINEAR SPRINGS
#358182
#358183
#358184
#358185
#358186
#358187
#358188
C=0.65
C=0.70
C=0.75
C=0.80
C=0.86
C=0.92
C=0.98
#358282
#358283
#358284
#358285
#358286
#358287
#358288
C=0.47
C=0.50
C=0.53
C=0.57
C=0.61
C=0.65
C=0.70
White
Grey
Silver
Grey-Blue
Blue
Violet
Purple
SHORT
SHORT
SHORT
SHORT
SHORT
SHORT
SHORT
(OPTION)
(OPTION)
(OPTION)
(OPTION)
(OPTION)
(OPTION)
(OPTION)
REAR LINEAR SPRINGS
BAGS
11.1
960026
N M2.5
White
Grey
Silver
Grey-Blue
Blue
Violet
Purple
LONG
LONG
LONG
LONG
LONG
LONG
LONG
35 2460
35 8019
35 8020
35 8032
35 8033
35 8040
35 8041
35 8042
35 8053
35 8054
35 8074
35 8084
(OPTION)
(OPTION)
(OPTION)
(OPTION)
(OPTION)
(OPTION)
(OPTION)
971034
358074
#358174
#358274
#358275
#358276
#358277
#358278
C=0.7-0.8
C=0.5-0.6
C=0.65-0.7
C=0.7-0.75
C=0.72-0.8
C=0.75-0.83
#358279 C=0.55-0.63 2 STRIPES
#358280 C=0.6-0.68 3 STRIPES
#358281 C=0.65-0.7 4 STRIPES
(OPTION)
(OPTION)
(OPTION)
(OPTION)
(STANDARD)
(OPTION)
358150
358020
LONG
LONG
LONG
358277
(STANDARD)
(OPTION)
(OPTION)
352460
35 8124
35 8142
35 8150
35 8162
35 8224
35 8263
35 8277
35 8279
96 0026
97 0100
97 0180
97 1034
XB8 ALU FRONT SHOCK BODY - HARD COATED (2)
ALU SHOCK BODY NUT FOR SHOCK BOOT (2)
ALU SHOCK BODY ADJ. NUT (2)
FRONT SHOCK SHAFT (2)
XB8 ALU REAR SHOCK BODY - HARD COATED (2)
XB8 REAR SHOCK SHAFT (2)
XRAY PROGRESSIVE SPRINGS - MEDIUM - 3 STRIPES - V2 (2)
XRAY LONG PROGRESSIVE SPRINGS - SOFT-MEDIUM - 2 STRIPES - V2 (2)
NUT M2.5 - SHORT (10)
O-RING 10 x 1.5 (10)
O-RING 18 x 1.8 (10)
SILICONE O-RING 3.5x2 (10)
2x FRONT SHOCKS (SHORT)
NOTE
ORIENTATION
2x REAR SHOCKS (LONG)
8 holes
ø1.2mm
pistons
8 holes
ø1.2mm
pistons
BAG
BAG
11.1
O 10x1.5
SHORT
MEDIUM
MEDIUM
MEDIUM
MEDIUM
MEDIUM
PIVOT BALL 5.8 - V3 (10)
COMPOSITE SET OF SHIMS FOR SHOCKS - V2 (2)
COMPOSITE SHOCK PARTS
SHOCK PISTON SET 8-HOLE (1.2; 1.3) 10-H. (1.1MM) - DELRIN - V2
COMPOSITE SHOCK 6-HOLE PISTON SET (1.2; 1.3; 1.4MM) - DELRIN - V2
HARDENED SHOCK SHIMS (4)
STEEL SHOCK BUSHING (2)
COMPOSITE SHOCK BUSHING & SHIM - V2 (2+2)
XB8 ALU SHOCK CAP NUT - BLACK COATED (2)
XB8 ALU SHOCK CAP NUT WITH VENT HOLE - BLACK COATED (2) (OPTION)
FOLDING SHOCK BOOT (4)
SHOCK RUBBER MEMBRANE BOTTOM RIBBED (4)
S 2.5x6x0.5
970100
Grey
Grey
1 STRIPE
2 STRIPES
3 STRIPES
4 STRIPES
REAR PROGRESSIVE SPRINGS
.......................................................
O 3.4x2
FRONT
SHOCK
REAR
SHOCK
(SHORT)
(LONG)
CORRECT
INCORRECT
TIGHTEN GENTLY
DO NOT OVERTIGHTEN
The self-locking nut is
gently tightened. The piston
remains undistorted and
fits inside the shock body
perfectly, ensuring smooth
movement of the piston.
The self-locking nut is
overtightened, causing
distortion of the piston. This
will negatively affect the free
movement of the piston in the
shock body.
INCORRECT
There are two different thickness shims, use them as
shown. Use the same procedure when building both front
and rear shocks.
Thick Shim
O-ring
Thin Shim
O-ring
Grip the shock rod at top of
exposed threads with side
cutting pliers. Be careful not
to damage the shock rod.
SHOCK DAMPING
SHOCK PISTONS
358279
FRONT & REAR PROGRESSIVE SPRINGS
358040
971034
PISTONS DETAIL
INCORRECT
CORRECT
DETAIL
CUTAWAY VIEW
33
SHOCK ABSORBERS
EXTREMELY IMPORTANT
2x FRONT SHOCKS
SHORT SHOCK ROD
SHORT SHOCK BODY
970180
O 18x1.8
2x REAR SHOCKS
LONG SHOCK ROD
LONG SHOCK BODY
INCORRECT
CORRECT
Do not push the shock rod straight
through the lower shock body
assembly; O-ring damage may result.
2x FRONT SHOCKS
Twist the shock rod through the
lower shock body assembly.
DETAIL
2x REAR SHOCKS
CUTAWAY VIEW
INCORRECT
1 mm
INCORRECT
Grip the shock rod at top of exposed
threads with side cutting pliers. Be
careful not to damage the shock rod.
CORRECT
DEFAULT SHOCK REBOUND SETTING 0% (LOW REBOUND)
Follow the TECH TIP on page
5 to install the pivot balls
Follow the steps below to set the shock rebound to the default setting of 0%.
FRONT (SHORT)
2x Oil 550cSt
2x REAR (LONG)
Oil 400cSt
HALF TIGHTEN
50%
SHOCK OIL
TIGHTEN FULLY
100%
DETAIL
3~5x
UP & DOWN
34
➊
➋
➌
➍
➎
➏
➐
Extend the shock shaft
completely. Fill the shock
body with the shock oil. For
the FRONT shocks (short)
use 550cSt oil. For the
REAR shocks (long) use
400cSt oil.
Move the shock shaft up and
down a few times to release
the air bubbles trapped
beneath the piston.
Orient the filled shock
vertically for several
minutes with the shock
shaft fully extended. The
remaining air bubbles will
release.
Install the shock membrane
into the groove in the
upper shock cap.
Gently place the shock cap
assembly onto the filled
shock body. Excess oil will
spill from the shock. Screw
the shock cap onto the
body by only a few turns.
Gently push the shock shaft
completely into the shock
body. Excess oil will flow
through the hole in the
shock cap.
Keep the shock shaft
pushed in the shock body
and tighten the shock cap
completely.
The rebound will be at
approximately 0%.
SHOCK ABSORBERS
FRONT SHOCK PRELOAD
approx. 2mm
2x FRONT SHOCKS
2x REAR SHOCKS
SHORT FRONT SHOCKS
LONG REAR SHOCKS
REAR SHOCK
PRELOAD
SHORT SPRING
LONG SPRING
approx. 2mm
IMPORTANT!
SPRING RATE
SHOCK PRELOAD
RIDE HEIGHT
IMPORTANT!
Both front shocks
must be the same
overall length.
IMPORTANT!
Both rear shocks
must be the same
overall length.
FRONT & REAR SHOCKS
ALTERNATE SHOCK REBOUND SETTING (50% AND 100%)
The default shock rebound setting is 0% (as described on page 35).
Alternatively, you may set the shock rebound setting to 50% or 100% as described below. Remove the shock springs before performing shock rebound adjustment.
SETTING THE SHOCK REBOUND TO 50% (MEDIUM REBOUND)
HALF TIGHTEN
50%
REMOVE SHOCK CAP
TIGHTEN FULLY
100%
50%
50%
➊
➋
➌
➍
➎
➏
Extend the shock shaft completely
and remove the shock cap.
Fill the shock body with shock
oil up to the top. Make sure to
use same viscosity shock oil as
is in the shock.
Orient the filled shock
vertically for several minutes
with the shock shaft fully
extended. The remaining air
bubbles will release.
Gently place the shock cap
assembly onto the filled shock
body. Excess oil will spill from
the shock.
Push the shock shaft 50% into
the shock body. Excess oil will
bleed thgrough the hole in the
shock cap.
Keep the shock shaft pushed
50% into the shock body
and tighten the shock cap
completely.
The rebound will be at
approximately 50%.
SETTING THE SHOCK REBOUND TO 100% (HIGH REBOUND)
TIGHTEN FULLY
100%
REMOVE SHOCK CAP
100%
➊
➋
➌
➍
Extend the shock shaft completely and remove
the shock cap.
Fill the shock body with shock oil up to the top.
Make sure to use same viscosity shock oil as is
in the shock.
Orient the filled shock vertically for several
minutes with the shock shaft fully extended.
The remaining air bubbles will release.
Gently place the shock cap assembly onto the filled
shock body. Keep the shock shaft extended 100% from
the shock body and tighten the shock cap completely.
The rebound will be at approximately 100%.
35
12. FINAL ASSEMBLY
903312
353511-K
353565
960030
359400
358047
960030
960030
358205
902318
359809
(not included)
Tires
(not included)
355261
358047
Inserts
(not included)
352030
960030
960030
355261
902319
358105
BAG
12
35 2030
35 3511-K
35 3511
35 3511-Y
35 3565
35 5261
35 5265
35 8047
35 8105
35 8205
902318
XB8 FRONT SHOCK TOWER PROTECTOR
XB8 REAR WING - BLACK
XB8 REAR WING - WHITE (OPTION)
XB8 REAR WING - YELLOW (OPTION)
COMPOSITE REAR WING SHIM - BLACK (2)
WHEEL NUT - RIBBED - HARD COATED (2)
WHEEL NUT WITH COVER - HARD COATED (2) (OPTION)
STEEL SCREW SHOCK PIVOT BALL WITH HEX (2)
XB8 FRONT SHOCK ABSORBERS + BOOTS COMPLETE SET (2)
XB8 REAR SHOCK ABSORBERS + BOOTS COMPLETE SET (2)
FRONT SHOCKS (SHORT)
SH M3x18
(SHORTER)
35 9400
35 9709
35 9809
BODY CLIP (10)
XRAY XB8E BODY FOR 1/8 ELECTRIC BUGGY - LOW DOWNFORCE
WHEELS STARBURST - YELLOW (4) (OPTION)
90 2318
90 2319
90 3312
96 0030
HEX SCREW SH M3x18 (10)
HEX SCREW SH M3x18 - LEFT THREAD (10)
HEX SCREW SFH M3x12 (10)
NUT M3 (10)
(LONGER)
4 3
NOTE ORIENTATION
2x
INITIAL SETTING
2
1
1
L=R
902319
SH M3x18
LEFT thread
Use STANDARD
M3x18 screw
960030
N M3
L=R
INITIAL SETTING
3x18
SHOCK ABSORBERS
36
On the front right arm use the SILVER M3x18
screw - this screw has LEFT THREAD
2 1
2
3 4
FINAL ASSEMBLY
902318
REAR SHOCKS (LONG)
M3x18
2x
L=R
(SHORTER)
43
(LONGER)
2
1
INITIAL SETTING
1
4
23
NOTE
ORIENTATION
902319
SH M3x18
LEFT thread
Use STANDARD
M3x18 screw
960030
N M3
L=R
SHOCK ABSORBERS
M3x18
NOTE
ORIENTATION
On the rear left arm use the SILVER M3x18
screw - this screw has LEFT THREAD
DETAIL
INITIAL SETTING
2 1
XRAY STARBURST WHEELS
#359808 Pink (OPTION)
#359809 Yellow (OPTION)
903312
SFH M3x12
960030
N M3
CA
To tighten the setscrew you can also use the
HUDY 17mm Wheel Nut Tool #107570
➊ Before cutting and making holes on the body, put the unpainted body on the chassis to confirm the
mounting position and location for holes and cutouts.
➋ Before painting, wash the inside of the body with mild detergent, and then rinse and dry thoroughly.
➌ Mask all windows.
➍ Apply paint masks as appropriate.
➎
➏
➐
➑
Paint the body using paints formulated for polycarbonate bodies.
When the paint is dry, remove the masking.
Carefully cut out the body using appropriate scissors or cutting tools.
When you have finished cutting, peel off the external protective films.
DETAIL
Body Reamer (HUDY #107600)
Ensure to make this rear body
mount hole oval so in the case of
chassis flex after a big jump the
body mount will not tear up the
hole.
37
TROUBLESHOOTING GUIDE
PROBLEM
CAR IS HARD TO
CONTROL
CAUSE
• Weak transmitter and/or receiver batteries
• Recharge or replace batteries
• Low reception from radio antennas
• Fully extend transmitter and receiver antennas
• Servo linkages not adjusted properly
• Move servo to neutral then re-adjust linkage(s)
• Weak transmitter and/or receiver batteries
STEERING DOES NOT
WORK PROPERLY
• Bent linkages or driveshafts
• Loose steering components
• Drivetrain damage
HANDLING PROBLEMS
STEERING FEELS
SLUGGISH OR VAGUE
THE CAR DOES NOT
DRIVE STRAIGHT
38
SOLUTION
• Recharge or replace batteries
• Check tightness of steering components and tighten if necessary
• Replace damaged parts
• Shocks are not working properly
• Rebuild the shocks and replace worn or broken parts
• Suspension is binding
• Make sure suspension moves freely. Replace worn or broken parts
• Improper tires
• Use different tires
• Suspension is binding
• Make sure suspension moves freely, and replace worn or broken parts
• Damaged steering servo
• Check the steering servo for damage and wear, and replace/repair if necessary
• Suspension is binding
• Make sure suspension moves freely, and replace worn or broken parts
• Steering trim is off-center
• Adjust steering trim until car drives straight
• Wheels are loose
• Check the make sure the wheel nuts are properly tightened
• Damaged steering servo
• Check the steering servo for damage and wear, and replace/repair if necessary
MAINTENANCE
SHOCK MAINTENANCE
The most important maintenance task for keeping consistent shock performance is refilling and bleeding them correctly. If built correctly, it will not be necessary
to re-build them often. Replacing warped/hard rubber bladders and o-rings, scarred piston rods, or shaved/split/loose composite upper and lower ball joints are also important.
• For club racing, it is recommended to check the shocks for air inside before each race
and only re-fill and bleed them if necessary. Before each race day, make sure you take
the spring off of each shock, hold it up to your ear, and quickly compress the shock rod
fully into the body while listening for any air making a “whistling” or “squishy” sound as
it passes through the piston holes. If you hear any air, refill and bleed your shocks. For
high-competition racing, it is recommended that the shocks be re-filled and bled before a
large event.
• If building or pairing new shocks, always make sure they are the same length using a
shock length measuring tool and adjust the lower ball joints as needed.
• If installing new rubber bladders, carefully trim the thin excess rubber from the edges of
their lips. Curved body scissors work the best.
• Regularly inspect the amount of dirt on the felt protector in the shocks (if present) and
regularly replace with a new one.
• During regular shock operation, oil naturally gets on the shock shaft and drop-by-drop
slightly gets out of the shock body. Shocks should be inspected regularly after each race,
and oil replaced as required.
BEARING MAINTENANCE
Ball-bearings in an off-road car or truggy must be properly maintained for smooth operation and long lifespan.
Typically, the ball-bearings included in new cars are greased for highest lifespan and as such the drivetrain may not seem to be as free as with lightly-oiled ball-bearings. However, when the
car is run the ball-bearings will become more free and the drivetrain will become very efficient.
There are several types of bearings discussed here: bearings which already come greased from the factory, bearings which must be lubricated using the HUDY Bearing Grease, and then
there are also bearings in the steering system which need to be lubricated with HUDY Bearing Oil.
The following procedures are recommended to clean all of the bearings in your off-road car or truggy. For high-competition racing, we recommended doing this every 3-4 weeks, or before a
major race.
1. Remove the seals on both sides of the bearing (if present). If the seals bend a little and
you can see a kink, carefully flatten the kink out by hand.
2. Spray the seals with motor cleaner and blow dry with compressed air.
3. Spray the bearing on both sides with motor cleaner.
4. Spin the bearing while it is still wet to dislodge any particles with the cleaner.
5. Spray the bearing on both sides again.
6. Blow both sides of the bearing dry with compressed air to make sure particles come out.
7. Hold the inner part of the bearing with my left thumb/forefinger and spin it to make sure
it spins free without any abnormal vibrations or sounds.
8. Place one drop of bearing oil into each side of the bearing.
9. Replace both seals at the same time by lining them up on each side of the bearing and
lightly pressing them in all the way around the bearings circumference with your thumb
and forefinger. Do not press too hard or use any type of tool, such as a wrench tip, to push
the blue seals in as they will push in too far, bend and cause drag.
If you spin test the bearing after you have re-oiled and sealed it, it will not spin freely for an extended period of time. The lightest of oils may allow it to spin for 1-2 seconds. This is normal
and once you have mounted the bearings in the car again, the drive train will spin freely.
Make sure you use a motor cleaner that does not leave a residue after it dries as this may cause drag and wear in the bearings.
HUDY #106230
RECOMMENDED PRODUCTS
• Use HUDY Bearing Grease to regularly lubricate grease-bearing ball-bearings.
• Use HUDY Bearing Oil to lubricate the bearings of the steering system.
HUDY #106220
HUDY #106222
HUDY #106221
SUSPENSION & DRIVETRAIN MAINTENANCE
• Check suspension for free movement during building and operation, and especially after
running and if you have crashed the car. If the suspension does not move freely, use the
appropriate HUDY Arm Reamer to clean and resize the holes of the suspension arms.
• Regularly check the drive shaft pins (both side and center) and if they show any wear
must be immediately replaced by new pins. If the car is run with worn pins, excessive
wear on the diff outdrives will result. The 106000 HUDY Drive Pin Replacement Tool (for
3mm Pins) is a compact, rugged multi-use tool set for replacing 3mm drive pins in drive
shafts. Use the HUDY replacement drive shaft pins 3x14 (#106050).
• Regularly inspect and replace the connecting pins which connect the center drive shafts
with the pinion gear, and also the pins that connect the wheel drive shafts with wheel
axles. Use HUDY Graphite Grease to lubricate the drive shaft connecting joints and the
diff gears.
• Pivot balls and ball-joints will naturally wear for some time and will generate play. If
there is too much play the pivot balls and ball joints need to be replaced.
• If the car is run in wet conditions, apply WD-40® on all drivetrain parts before the run.
After the run, clean and dry the parts again.
HUDY #106210
HUDY SPRING STEEL™
The HUDY Spring Steel™ used in the car is the strongest and most durable steel material on the RC market. While items made from HUDY Spring Steel™ are still subject to wear, the
lifespan is considerably longer than any other material. As parts made from HUDY Spring Steel™ wear, the brown color will after some time “go down” but it will not affect the strength of
the material. The brown color is only a surface treatment and if the brown color will wear the durability of the part will be still strong.
39
RC AMERICA, 2030 Century Center Blvd #15, Irving, TX 75062, USA
PHONE: 214-744-2400, FAX: 214-744-2401, xray@rcamerica.com
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