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RECOMMENDED PRODUCTS

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 3x12 (#106051).

•  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.

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 

MAINTENANCE

•  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.

  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.

  Spray the seals with motor cleaner and blow dry with compressed air.

  Spray the bearing on both sides with motor cleaner.

  Spin the bearing while it is still wet to dislodge any particles with the cleaner.

  Spray the bearing on both sides again.

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 

o-rings, scarred piston rods, or shaved/split/loose composite upper and lower ball joints are also important.

BEARING MAINTENANCE

Ball-bearings in an off-road car must be properly maintained for smooth operation and long lifespan. 

The XB4 ball-bearings are degreased and are lubricated with HUDY Bearing Oil or HUDY Grease. The following procedures are recommended to clean all of the bearings in your off-road car. For high-

competition racing, we recommended doing this every 3-4 weeks, or before a major race.

•  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.

•  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. 

  Blow both sides of the bearing dry with compressed air to make sure particles come out.

  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.

  Place one drop of bearing oil into each side of the bearing.

  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.

•  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. 

brown color will fade (get lighter) 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.

#106210 HUDY GRAPHITE GREASE

#106213 HUDY JOINT GREASE

or

•  Use correct oil or grease to lubricate the bearings:

#106230 HUDY Bearing Oil

#106220 HUDY Bearing Grease - Standard

#106221 HUDY Bearing Grease - Blue

#106222 HUDY Bearing Grease - Red

HUDY #106230

HUDY #106220

HUDY #106221

HUDY #106222

If you spin test the bvearing 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.

Содержание XT4

Страница 1: ...I N S T R U C T I O N M A N U A L...

Страница 2: ...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 edg...

Страница 3: ...l 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 periodic...

Страница 4: ...Apply grease Scale Ensure smooth non binding movement 1 1 DETAIL Apply cleaner ITEMS INCLUDED HUDY Premium Silicone Oils HUDY Premium Silicone Oils HUDY Premium Silicone Oils HUDY Premium Silicone Oi...

Страница 5: ...w hudy net 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 XRAY offers wide range of optio...

Страница 6: ...64961 GEAR DIFF OUTDRIVE ADAPTER FOR 2 5MM PIN HUDY SPRING STEEL 2 364990 COMPOSITE BEVEL GEAR BUSHING 2 903258 HEX SCREW SFH M2 5x8 10 941014 BALL BEARING 10x15x4 RUBBER SEALED GREASE 2 964031 WASHER...

Страница 7: ...stability TIPS FOR DIFFERENTIALS REAR DIFERENTIAL FRONT DIFERENTIAL 107865 HUDY Ultimate Digital Pocket Scale 300g 0 01g Tighten the screws equally but do NOT tighten them completely Finish tightening...

Страница 8: ...80 STEEL OPTION 304931 304980 GRAPHITE OPTION CENTER DIFF SPUR GEARS 364978 78T 48 OPTION 364981 81T 48 INCLUDED 304930 COMPOSITE GEAR DIFF BEVEL SATELLITE GEARS 2 4 304980 COMPOSITE GEAR DIFF CROSS P...

Страница 9: ...s stability FOR CENTER DIFFERENTIAL 107865 HUDY Ultimate Digital Pocket Scale 300g 0 01g g 1 1 00 g 1250 11 00g 1 50g 12 50g Diff 100 000cSt 1 GEAR CENTER DIFFERENTIAL 902306 SH M3x6 903258 SFH M2 5x8...

Страница 10: ...KHEAD BLOCK SET REAR 363083 XT4 GRAPHITE SHOCK TOWER REAR 3 5MM 365124 STEEL BEVEL DRIVE GEAR 14T 365230 DRIVE SHAFT COUPLING HUDY SPRING STEEL 365427 CENTRAL DRIVE SHAFT 105MM HUDY SPRING STEEL 36544...

Страница 11: ...RIENTATION DETAIL XRAY BALL BEARINGS 359050 5x10x4 GREASE OPTION 940510 5x10x4 OIL INCLUDED 940814 8x14x4 GREASE OPTION 940815 8x14x4 OIL INCLUDED 981208 P 2x8 Bearing Oil HUDY 106230 5x10x4mm OIL Bea...

Страница 12: ...NGS 359050 5x10x4 GREASE OPTION 940510 5x10x4 OIL INCLUDED 940814 8x14x4 GREASE OPTION 940815 8x14x4 OIL INCLUDED 362002 DIFF BULKHEAD BLOCK SET FRONT 362084 XT4 GRAPHITE SHOCK TOWER FRONT 3 5MM 36512...

Страница 13: ...SH M3x10 NOTE ORIENTATION THREAD LOCK NOTE ORIENTATION NOTE ORIENTATION DETAIL FRONT DIFF 30 000cSt 5x10x4mm OIL 8x14x4mm OIL GRAPHITE GREASE HUDY 106210 981208 P 2x8 Bearing Oil HUDY 106230 Bearing...

Страница 14: ...OSITE SET OF SERVO SHIMS 4 362003 DIFF BULKHEAD BLOCK SET REAR 362315 ECCENTRIC BUSHING SET 2 362478 ANTI ROLL BAR 1 8 MM 323112 M XT4 COMPOSITE SUSPENSION ARM REAR LOWER MEDIUM 363311 ALU REAR LOWER...

Страница 15: ...amounts of adjustment using the center and outside positions of the eccentric bushings The middle position eccentric bushings allow for finer adjustment increments Example 0 RR 0 RF 2 0 RR 0 5 RF 2 5...

Страница 16: ...n the 3x4 setscrew if the anti roll bar does not turn freely Step 901308 SB M3x8 901303 SB M3x3 901304 SB M3x4 902308 SH M3x8 DETAIL DETAIL DETAIL DETAIL ANTI ROLL BARS 362470 1 0mm OPTION 362471 1 1m...

Страница 17: ...TRIC BUSHING SET 2 362320 ALU FRONT LOWER SUSP HOLDER REAR 7075 T6 5MM 362478 ANTI ROLL BAR 1 8 MM 367210 SUSPENSION PIVOT PIN 2 901303 HEX SCREW SB M3x3 10 901304 HEX SCREW SB M3x4 10 901308 HEX SCRE...

Страница 18: ...FF 0 FR 9 0 5 FF 0 FR 9 5 1 FF 0 FR 10 9 9 5 10 The XRAY alu front lower suspension holders provide great range of adjustment for the front suspension Using different combinations of eccentric bushin...

Страница 19: ...ti roll bar does not turn freely Step 3x4mm 3x3mm 3x8mm 901308 SB M3x8 901303 SB M3x3 901304 SB M3x4 902308 SH M3x8 902308 SH M3x8 DETAIL DETAIL DETAIL DETAIL ANTI ROLL BARS 362470 1 0mm OPTION 362471...

Страница 20: ...2 96 0030 NUT M3 10 96 1025 WASHER S 2 5 10 96 2030 WASHER S 3x6x0 3 10 96 2031 WASHER S 3x6x0 1 10 98 0210 PIN 2x10 10 902310 902254 365230 325316 325340 941014 306219 940513 365360 362280 960030 362...

Страница 21: ...UE 106222 RED XRAY BALL BEARINGS 940512 5x12x4 OIL OPTION 941015 10x15x4 OIL OPTION 940513 5x12x4 GREASE INCLUDED 941014 10x15x4 GREASE INCLUDED OPTIONAL HEX HUB EFFECTS Different offset hex hubs are...

Страница 22: ...SETTING CONICAL SHIM 3x6x2mm ALU CONICAL SHIMS 362280 SILVER INCLUDED 362280 K BLACK OPTION 362280 O ORANGE OPTION 2x L R NOTE ORIENTATION 961025 S 2 5 962031 S 3x6x0 1 962030 S 3x6x0 3 902254 SH M2 5...

Страница 23: ...9050 365470 327220 961025 362651 960030 902254 902312 325317 365230 362291 940513 980210 980210 362210 H 902314 362280 362652 302665 302665 902205 365240 BAG C HUBS 362210 RIGHT 9 M OPTION 362210 H RI...

Страница 24: ...for rough tracks to improve stability INITIAL POSITION DETAIL HIGHER ROLL CENTER TOP SHORTER bushing 3x12 screw BOTTOM LONGER bushing 3x14 screw Recommended for smooth tracks to gain more steering DE...

Страница 25: ...If the C hub does not move freely use a HUDY Arm Reamer to resize the hole ARM REAMER HUDY 107633 CONICAL SHIM 3x6x2mm NOTE ORIENTATION NOTE ORIENTATION 362280 CON SHIM 3x6x2 960030 N M3 Check for fr...

Страница 26: ...02312 902310 902316 902314 HEX SCREW SH M3x14 10 902316 HEX SCREW SH M3x16 10 903308 HEX SCREW SFH M3x8 10 903310 HEX SCREW SFH M3x10 10 903314 HEX SCREW SFH M3x14 10 960030 NUT M3 10 961032 WASHER S...

Страница 27: ...flex and are recommended for low traction tracks Do not fully tighten the screws during assembly Fully tighten the screws only after both front and rear suspension assemblies are mounted to the chass...

Страница 28: ...3x10mm 3x10mm 3x10mm 3x14mm 3x10mm After you mount the rear suspension assembly to the chassis fully tighten all 4 screws that were previously left untightened page 25 step 2 After you mount the front...

Страница 29: ...G PLATE 363241 BALL UNIVERSAL 5 75MM WITH BACKSTOP 2 902308 HEX SCREW SH M3x8 10 902310 HEX SCREW SH M3x10 10 903310 HEX SCREW SFH M3x10 10 903316 HEX SCREW SFH M3x16 10 903318 HEX SCREW SFH M3x18 10...

Страница 30: ...NG NOTE ORIENTATION NOTE ORIENTATION 303125 SHIM 3x6x3 902308 SH M3x8 902310 SH M3x10 Increases steering precision and predictability and is recommended for use in high traction conditions Includes ex...

Страница 31: ...ds outside NOTE ORIENTATION Adjustment block towards outside 2x 2x L R L R 303125 SHIM 3x6x3 Check for free movement Check for free movement INITIAL POSITION DETAIL view SHIM 3x6x2mm 902310 SH M3x10 3...

Страница 32: ...x18 10 903308 HEX SCREW SFH M3x8 10 941015 BALL BEARING 10x15x4 RUBBER SEALED OIL 2 364901 GEAR CENTER DIFFERENTIAL SET 364023 941015 902318 364013 903308 941015 903308 903308 361175 364901 361320 361...

Страница 33: ...106230 OIL NOTE ORIENTATION REARWARD WEIGHT POSITION More traction on the rear suspension increases stability of the car recommended for use on very low traction tracks TIGHTEN GENTLY 95mm 82mm 365425...

Страница 34: ...34 6 SLIPPER CLUTCH ASSEMBLY 903308 SFH M3x8 902308 SH M3x8...

Страница 35: ...368261 306219 306219 306219 902205 970120 363240 352460 368010 970140 368140 970080 368260 368031 368010 972031 965023 BAG PISTONS DETAIL 2 holes 1 6mm 2 holes 1 6mm 2 holes 1 7mm 2 holes 1 7mm 0 hol...

Страница 36: ...body assembly O ring damage may result Always use same shim thickness on right and left side to achieve same downstop 306219 DOWNSTOP SHIMS THICKER shim used GREATER downstop is achieved IMPORTANT FR...

Страница 37: ...short use 650cSt oil For the REAR shocks long use 450cSt 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 s...

Страница 38: ...5 STEEL SCREW SHOCK PIVOT BALL WITH HEX 2 902308 HEX SCREW SH M3x8 10 902310 HEX SCREW SH M3x10 10 902312 HEX SCREW SH M3x12 10 903308 HEX SCREW SFH M3x8 10 903310 HEX SCREW SFH M3x10 10 960030 NUT M3...

Страница 39: ...3 960030 N M3 NOTE ORIENTATION NOTE ORIENTATION SHOCKS For the rear shock position cut holes into the Lexan rear wing SHOCKS SHOCKS INITIAL SETTING SHOCKS MOUNTED IN FRONT OF REAR SHOCK TOWER ALTERNAT...

Страница 40: ...HUDY ALU SERVO HORNS 293497 23T 293498 24T 293499 25T HUDY CLAMP ALU SERVO HORNS 293404 23T 293405 24T 293406 25T For more in corner steering and better steering response aluminum servo horns may be u...

Страница 41: ...ar Adjust gear mesh Tighten the screw NOTE ORIENTATION Pinion NOT INCLUDED Loosen the screw Insert motor into the bulkhead NOTE PINIONS 365718 18T 48P 365719 19T 48P 365720 20T 48P 365721 21T 48P 3657...

Страница 42: ...107871 HUDY CUT Double sided Tape HUDY 107875 NOT INCLUDED Receiver NOT INCLUDED Feed the receiver wire into the antenna tube 903310 SFH M3x10 903308 SFH M3x8 Double sided Tape HUDY 107875 NOT INCLUDE...

Страница 43: ...the mounting position and location for holes and cutouts Before cutting and making holes on the WING put the unpainted wing on the wing holders to confirm the mounting position and location for holes...

Страница 44: ...L R 8 FINAL ASSEMBLY Double sided Velcro tape is used to seal the body against the side guards 902310 SH M3x10 981212 P 2x12 VELCRO TAPE WITH DOUBLE SIDED TAPE Velcro tape hook side Velcro tape soft...

Страница 45: ...45 960240 N M4 8 FINAL ASSEMBLY 903308 SFH M3x8 OPTIONAL ALU WING SHIMS 293561 SILVER OPTION 293561 O ORANGE OPTION Tires Inserts NOT INCLUDED...

Страница 46: ...rods or shaved split loose composite upper and lower ball joints are also important BEARING MAINTENANCE Ball bearings in an off road car must be properly maintained for smooth operation and long lifes...

Страница 47: ...NOTE...

Страница 48: ...TeamXray TeamXray TeamXray XrayRacing TeamXrayRC XrayRacing 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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