INSTRUCTION MANUAL & REFERENCE GUIDE
Welcome to Serpent The Serpent Cobra E-truggy is based on the successfull Cobra offroad platform. It is designed to be a world champion, while still being easy to use, assemble, and set up. You are now part of the worldwide network of Serpent drivers. The Serpent Cobra offers state of the art specifications and leads the way in 1/8 scale offroad chassis design, using all the knowledge our designers have gathered from racing offroad cars for over 15 years, into this design too.
Read this first! - This is a highly technical hobby product, intended to be used in a safe racing environment. This car is capable of speeds in excess of 80 km/h or 50mph. Please follow these guidelines when building and operating this model. - Parental guidance is required when the builder/user of this car is under 16. - Follow the building instructions. If in doubt, contact your dealer or importer. - Be sure to use the proper tools when assembling the car.
STEP 1 1.1 DIFFERENTIAL CENTER ASSEMBLY TIP CENTER 8x16x5 DIFF BAG Use some grease during assembly TIP 1.2 Add 2mm oil before assembling the gear 8x16x5 Use silicone oil to hold seal in position Use some grease during assembly TIP 1.3 1.4 M3x12 2 1 Silicone oil fill just over gear shaft. Page 4 Check default SET-UP sheet for CST value of the silicone oil.
STEP 2 2.1 DIFFERENTIAL FRONT/REAR ASSEMBLY TIP Use some grease during assembly FR/RR 8x14x4 Flanged DIFF BAG TIP 2.2 Add 2mm oil before assembling the gear Use some grease during assembly 8x14x4 Flanged Use silicone oil to hold seal in position TIP 2.3 2.4 M3x12 2 1 Silicone oil fill just over gear shaft. Page 5 Check default SET-UP sheet for CST value of the silicone oil.
STEP 3 CENTER ASSEMBLY Bag 1 M4X10 STEP 4 Page 6 M3X8
REAR ASSEMBLY 3 STEP 5 13x19x4 4 5 2 6 2 8x9x16 8x11x0.2 Bag STEP M5X4 6.1 2.5X13 6 8x11x0.1 1 6.2 Nylock nut M3 2.5X5 WIDE THREAD Use 14x15.6x0.2 shims to adjust proper gear mesh (shims included in the diff bag). Notice orientation of the diff.
STEP 8 5 6 1 4 2 3 M4x12 Special M3x40 Proper insert orientation in the REAR bracket, left and right equal type TIP Proper insert orientation in the FRONT bracket, left and right equal type TIP STEP 9 Bag 3 Nylock nut M3 Nylock nut M3 M3x18 1 M3x18 2 M3x20 M3x25 3 M3x18 M3x20 Page 8
STEP 10 M3x12 Flanged M3x6 56.5mm TIP STEP 11 11.1 1 3 Bag 4 2 8x16x5 2.5x17 6 15x21x4 TIP Move clips over pin after assembling 2.5x15 M3x4 M5x4 5 4 TIP 11.
STEP 12 M3x3 M3x3 M3x3 M3x3 Use threadlock on these screws TIP TIP 35mm STEP 13 M4x12 Page 10
FRONT ASSEMBLY STEP 2 14 4 5 M5x4 8x11x0.2 Bag 5 1 6 13x19x4 3 2.5x13 8x19x6 8x11x0.1 TIP STEP 15 2.5x5 WIDE THREAD Use 14x15.6x0.2 shims to adjust proper gear mesh (shims included in the diff bag). Notice orientation of the diff.
STEP 18 5 1 2 M4x12 Special Proper insert orientation in the rear bracket 3 4 M3x16 Proper insert orientation in the front bracket TIP TIP STEP 19 M3x12 Flanged 61.
STEP 20 2 15x21x4 3 8x16x5 6 1 M3x4 2.5x17 M5x4 2.
STEP 22 M3x22 Nylock nut M3 M4x18 SPECIAL STEP 23 M3x3 M3x3 M3x3 M3x3 Use threadlock on these screws TIP TIP 35mm Page 14
STEP 24 M4x14 M4x12 STEERING ASSEMBLY STEP 1 25 Bag 7 M4x10 M4x10 2 M4x10 Page 15
TIP 2 STEP 26 4mm 1 Nylock nut M3 M3x18 STEP 27 M3x18 M3x18 64.
2 STEP 29 M3x16 M3x10 1 M3x10 STEP 30 Nylock nut M3 1 M3x12 Nylock nut M3 2 M3x12 Page 17 3
SIDE-GUARD / RADIO ASSEMBLY STEP M3x3 31 3 Bag 8 1 2 STEP 32 M3x8 M4x10 M3x8 Page 18 M3x8 M4x10 M4x10 M4x10 M3x8
STEP 33 32.1 32.2 M2x10 M2x10 M3x16 NOT INCLUDED Use enough servo-spacers to allow servolever to clear radiobox by 0.5 to 1.0 mm (see step 32.3) M3x3 NOT INCLUDED M3x16 NOT INCLUDED 32.3 Tip: Use double sided tape to mount the ESC and Transponder.
SHOCK ASSEMBLY STEP 35 35.1 Use threadlock Nut M3 Bag 9 RR 35.2 Apply silcione oil to assemble the o-rings Bag 10 FR 35.3 35.4 Apply silcione oil to assemble the shockshaft Apply silcione oil to mount the nut 35.5 35.6 Page 20 REAR shock 124mm FRONT shock 113.
35.7 Push membrane into the shock top 35.8 - Fill up with sillicone oil - Wait for air bubbles to escape - Close top only 3/4 - Check default SET-UP sheet for CST value of silicone oil 35.
SHOCK MOUNTING STEP 35 M3x8 M3x8 M3x3 NOTE: SHOKS SHOWN WITHOUT SHOCKS BOOTS M3x3 NOTE: SHOKS SHOWN WITHOUT SHOCKS BOOTS STEP 36 M3x8 M3x8 M3x3 Page 22 M3x3
FINAL ASSEMBLY STEP 37 Bag 11 M4x10 3 NOT INCLUDED M4x4 1 STEP M3x15 38 Nylock nut M3 Page 23 M4x10 2
STEP 39 NOT INCLUDED NOT INCLUDED FOAM STEP 40 BODYSHELL: 1) Apply the masking sheet provided and paint the body on the inside. 2) Cut the body along the provided cuttinglines on the body for a perfect fit. Same for the body mounting holes. 3) Remove the body protection film on the outside of the body. 4) Apply the provided Serpent and Cobra decals, and mount the body on the bodyposts, with the provided bodyclips.
REF GUIDE: EXPLODED VIEWS and PARTS-LIST Contents DIFFERENTAL ASSEMBLIES 26 TRANSMISSION CENTER 26 REAR ASSEMBLY 27 FRONT ASSEMBLY 28 STEERING ASSEMBLY 29 RADIO ASSEMBLY 29 SHOCK ASSEMBLY 30 FINAL ASSEMBLY I Page 25 PARTS-LIST 30 31
DIFFERENTIAL ASSEMBLIES 1396 CENTER 600627 600421 110127 600376 600627 600210 600425 1396 600410 600421 600210 600376 Complete FR/RR Diff 600323 Complete CENTER Diff 50T 600375 Complete DIFF UNI 600325 600627 600627 600421 600200 FRONT REAR 600696 1349 600200 600425 600421 1349 TRANSMISSION CENTER 110109 600443 600446 600446 600667 Page 26 110111
110212 110148 600189 110402 600423 600382 1396 110132 600263 600365 110115 600225 600474 600414 600193 600174 600131 1396 600475 600197 600513 600108 600132 110122 600384 1393 110211 1995 600695 110147 110145 600263 110132 600623 110132 110138 110432 110431 110402 600178 600168 110111 600132 110159 600263 110140 110142 600131 600132 600155 110175 1337 600131 110402 600630 600185 600365 110141 600420 Page 110132 600263 600133 600381 600101 600
110148 600420 600382 600183 Page 1396 110115 600326 110212 110137 600481 110481 600190 600131 600176 600185 1337 600326 600190 600373 600131 600478 600416 110402 110107 600422 600225 600193 600174 600131 110216 600117 600132 600670 600108 600379 110402 110431 110432 110138 1312 110116 903343 1395 600129 110159 600177 600132 110107 600263 600695 110147 110111 600397 600129 110118 110145 600427 110105 110211 1393 600377 600473 600197 600178 60
STEERING ASSEMBLY 110104 110127 110158 110104 600153 600334 600182 600173 1321 600672 110402 1321 110402 600128 600170 110402 600191 600178 600131 600128 1321 600128 600178 600199 600412 600167 600330 600109 600131 600169 600191 600412 110140 600131 600191 600191 600131 600178 110140 110127 RADIO ASSEMBLY 1606 110111 110407 110149 600261 600437 600668 600672 600227 600499 600437 110127 600178 110116 600204 110402 600437 110146 600500 600668 600668 110116 600668 60
SHOCK ASSEMBLY 600159 600111 600158 600160 Front 600387 Rear 600234 600145 600112 600235 110407 600252 600253 600254 600255 600256 600257 600258 600260 600366 600402 600403 600404 600405 600406 600407 600408 Spring Spring Spring Spring Spring Spring Spring Spring Spring Spring Spring Spring Spring Spring Spring Spring set set set set set set set set set set set set set set set set 600118 600394 Rear 600180 SHOCK SPRINGS 600112 600393 Front RR pink 2.8lbs (2) RR blue 3.0lbs (2) RR purple 3.
PARTS-LIST Page 31 Description 600035 Serpent 811 Cobra-T Truggy 1/8 4wd TE Decals 1887 Decal Serpent black/white 1/8 (2) 1889 Decal Serpent chrome 1/8 (2) 600332 Decal sheet S811 chrome (2) 600609 Decal sheet S811 Truggy black and white (2) Radio Installation / Battery 1606 Antenna rod black (2) 600131 Balljoint set (19) 600437 Steering balljoint + lever 811-E 600479 Battery foam pad (2) 600499 Pivotball double straight (3) 600500 Servo spacers (8) 600668 Battery radiobox 811-T-e
Page 32 600373 C-Hub Truggy 12 L+R 600379 Driveshaft Truggy (2) 600381 Gear coupler rubber boot (2) 600382 Hex adaptor clip (2) 600396 Shocktower Truggy front carbon 600412 Track rod M4x92 (2) 600416 Track rod M5x91 (2) 600420 Wheelhexagon Truggy + clip (4) 600422 Wishbone front L+R 600431 Antiroll bar front truggy 2,3mm 600478 Wheelaxle FR V2 (2) 600481 Steeringblock L+R V2 600670 Driveshaft center FR 811-T-e 600672 Chassis Brace Fr/Rr 811-T-e 600673 Bodymount Fr/Rr 811-T-e 903343 Antirol
Page 33 600209 Diff pin 10T (2) 600210 Diff pin outdrive (2) 600213 Shim 6x11.75x0.2 (10) 600214 Shim 3.5x12x0.2 (10) 600215 Shim 8x11x0.2 (10) 600354 Shim 14x15.5x 0.65 (4) 600356 Shim 14x15.5x0.2 (10) 600375 Diff Center 50T 600376 Diff outdrive center (2) 600410 Spurgear 50T 600421 Oring centerdiff V2 (10) 600425 Diff housing V2 600517 Shim 8x11x0.
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NEWS / NOTES Page 35
#82432-1 S811T-e Manual version 1 www.serpent.com - info@serpent.
