INSTRUCTION MANUAL - Ashford Hobby

1.0 PREPARATIONSTEP 1.1BAG DSHOCK ABSORBERSFill ALL 4 shock absorbers with shockoil using the following steps1Unscrew the bottom half ofthe pre-assembled shockabsorbers.2FILLINGFill the shock body with the suppliedshock absorber oil.BLEEDINGLet the oil settle and allow the air toescape.STEP 1.21Massage some shock oil into theshock sponge before re-assemblingthe shock absorber.2With the shock body filled withoil, slowly screw the bottom halfof the pre-assembled shock backonto the shock body.IMPORTANT! Do not crossthread!Oil will overflow through thebuilt-in bleed channel in thethreads.Shock Length68mmfor all shocksLearn about shockdamping- 4 -

STEP 1.3GEAR DIFFERENTIALSFill BOTH pre-assembled front &rear gear diffs with diff oil using thefollowing steps.STEP 1.4STEP 1.5FRONT DIFF: Use 50,000 diff oilREAR DIFF: Use 30,000 diff oilFill the space around the gears with theindicated Serpent Diff Oil until level withthe top of the casing. Rotate the outputshaft to allow the grease to fill all gaps in andaround the gears.- 5 -

STEP 1.6IMPORTANT!Make sure to set O-ring in placeSTEP 1.7IMPORTANT!The mounting screws are different forthe front and rear differential so pleasebe sure to use the correct ones.Do not overtighten screwsFront Diff - Long ScrewsRear Diff - Short Screws- 6 -

2.0 FRONT ASSEMBLYSTEP 2.1 BAG 1H9M3x4mmH10M3x10mm443H9Learn about front rollcenter adjustment1H10H934Make sure L + R inserts are inequal but opposite positions(mirrored).2H101RightLeftSTEP 2.2BAG 2H11M3x8mmH9M3x4mmH111H9132H1123H9Set front anti-roll barPress anti-roll bars into mounts farenough so the bars do not bind whenthe suspension is compressed.- 7 -

STEP 2.3BAG B12B123.5x9.5mmE14M3x16mm3312E1412E14B12B12B124B12STEP 2.4BAG 3G11M3x8mmL3M31L3L3L3G11G11G112- 8 -

STEP 2.5BAG UU1312x18mmU13Note proper orientation of diff.1U13LEFT FRONT ECCENTER2FrontTighterDefaultLooserChange the position of BOTH eccentrichubs to adjust front belt tension. Bothhubs should have the same position.STEP 2.6 BAG 4B133.5x13mmH11M3x8mmDownstop screwsH113H111Set front downstops2B13- 9 -

STEP 2.7E14M3x16mm5E14Assemble both front upper armsusing the indicated steps.15E14432IMPORTANT!Install front inserts so they match theircorresponding rear inserts (step 2.1)STEP 2.8Set casterSpacer placement1mm2mm4mm- 10 -

STEP 2.9BAG 5, UH8M3x3mmAssemble both steering blocksusing the indicated steps. L + Rsteering blocks are mirrored.1P12x10mmU1110x15mmP1H84U113U1121STEP 2.10 BAG 6TOP17mmBOTTOM15mmSet front track-widthand camberSTEP 2.11BAG UB52.9x9.5mmU6U61U66x13mm12B5B5B5- 11 -

STEP 2.12 BAG 7H16M4x4mmR77mmH165R72H16R7341Completed assemblySTEP 2.13B52.9x9.5mmG10M3x6mm2B5B5G101G10- 12 -

3.0 REAR ASSEMBLYSTEP 3.1BAG 8, E10E10M3x6mm41Roughen the metal plateswith sandpaper before gluingP72.5x14mmR33mm3P7E10E105R326E107STEP 3.2BAG 9, 10, B13, UB133.5x13mm1Note orientation of front inserts. EnsureBOTH inserts have the same position.H17M4x6mmR77mmRoll centre insert orientationU66x13mm27Left BlockRight BlockU63H175R7U624Learn about rear rollcenter adjustment6B13B138B13- 13 -

STEP 3.3E10M3x6mmAssemble both rear lower armsusing the indicated steps.E11M3x8mmH12M3x10mmE11E101H1223Set rear downstopsSTEP 3.4BAG UU1312x18mmU131U13FrontLEFT REAR ECCENTER2LooserDefaultTighterLEFTREARChange the position of BOTH eccentrichubs to adjust rear belt tension. Both hubsshould have the same position.STEP 3.5BAG 11, E11E11M3x8mmE13M3x12mm1E11E13E113E13E111E132E131Learn about rearcamber rise adjustmentUpper camber link mounting hole- 14 -

STEP 3.6BAG E11E11M3x8mmP12x10mm1E11E114E1124P12E113P13STEP 3.7BAG 12, E11E11M3x8mmE13M3x12mmCompleted assembly1E113E11E132E13STEP 3.8IMPORTANT!Install rear inserts so they match theircorresponding front inserts (step 3.2)Learn about rear rollcenter adjustmentRoll centre insert orientation- 15 -

STEP 3.9BAG E11B133.5x13mm3E11E11M3x8mm3E112B131B13B13B134STEP 3.10BAG 13H8M3x3mmP12x10mmU1110x15mm1H843U112P1U111Assemble both rear uprightsusing the indicated steps.STEP 3.11- 16 -

STEP 3.12 BAG 14R22mm15R212R23R25 234Set rear track-width,camber and toeLearn more aboutcamber rise adjustment4R2TOP VIEW4FRONTREAR146mm16.5mm16.5mmUpper camber link mounting hole1:1STEP 3.13U34x8mm1U32- 17 -

STEP 3.14BAG 15, E11E11M3x8mmH8M3x3mm57E1146H8E11235H817142mm71:1Anti-roll bar wishbone mounting positionSTEP 3.15H16M4x4mmR77mmH161R71Completed assembly- 18 -

4.0 RADIO PLATE ASSEMBLYSTEP 4.1BAG 16, E11E10M3x6mmE11M3x8mmE13M3x12mmE131E13E115E111Note the orientation of the servomounting screw blocks. Reversethe default orientation to mount asmaller servo.Note the orientation of the servo mountingscrew blocks. Reverse the default orientationto mount a smaller servo.242E10E13E133E11E132Use the following servo armswith these brands of servos.23 - Sanwa / KO / JR24 - Hitec25 - FutabaSTEERING SERVO:Servo output shaft mustbe towards FRONT of car.STEP 4.2BAG 17E14M3x16mm21E14E14Securely attach receiver to mounting plate.RACING TIP: To protect the receiver againstfuel and moisture, seal the wired receiverinto a rubber balloon before mounting it.- 19 -

STEP 4.3E11M3x8mmE12M3x10mmE1221E11E123E12STEP 4.4BAG 18, E11E11M3x8mmH9M3x4mm745E113E1152H971FUEL CAP FITTING PLACEMENTCW tracks: Fitting on RIGHT side.CCW tracks: Fitting on LEFT side.6- 20 -

5.0 RADIO PLATE MOUNTINGSTEP 5.1BAG B12B123.5x9.5mmB12B12STEP 5.2BAG 19, UE11M3x8mmG11M3x8mmR44mmU35x8mm54G112U3R41E11FRONTCompleted assembly3U3- 21 -

STEP 5.3E11M3x8mmE114E134E13M3x12mmE11E1313141mm1:122SteeringLinkage1Servo Saver- 22 -

STEP 5.4BAG 20, E10E10M3x6mm213233E10IMPORTANT! Ensure the front suspensionmoves up and down freely without binding.2E101Assemble L & R steering rods:72mmSet front toe1:1STEP 5.5BAG E11E11M3x8mmG11M3x8mmG11E11E11- 23 -

6.0 GEARBOX ASSEMBLYSTEP 6.1BAG 21, E13E13M3x12mmSHIFT POINTscrew3H8M3x3mmGAP SETTINGscrewH84E13Start with screw headflush with bottom edge ofhole. Both screws must beset equally.21Learn about shift pointand shoe gap13TO SHIFT LATERTighten both screws equallyTO SHIFT EARLIERLoosen both screws equallyH8E134GAP SETTINGscrew3SHIFT POINTscrewSTEP 6.2G10G10M3x6mm2G10G101st Gear59T1- 24 -

STEP 6.3BAG U1G10M3x6mmU66x13mmU62V56x10mm2nd Gear57TG1031V5G104G10STEP 6.4BAG 22H11M3x8mmP133x13.8mmR55mmOW3P136R54H1121Learn about shoe gap5ADJUSTING THE 2-SPEED SHOE GAPLoosed the two gap-setting set screws to allow the shoes to rest on the driveadaptor.Install the 2-speed shoes in the 2nd gear drum, but do NOT install the 1st gear.There should be equal but minimal spacing between the 2-speed shoes and the 2ndgear drum. Tighten BOTH gap setting set screws until the shoes touch the insidesurface of the aluminum 2nd gear drum, then loosen BOTH set screws by 1/2 turneach. The 2nd gear should spin freely.Install the first gear.- 25 -

7.0 SHOCK ATTACHMENTSTEP 7.1BAG E12E12M3x10mm1E122E12STEP 7.2BAG E10E10M3x6mmE103E102Set front shock positionNote the shock mount holes used.2Learn about shockadjustment (damping,springs, preload)1Front Shock = Short SpringSTEP 7.3BAG E12, E13E12M3x10mmE13M3x12mmE1243E122E13E131- 26 -

STEP 7.4BAG 23, E11E11M3x8mm6P12x10mmP1533E114P1212P11STEP 7.5BAG E10E10M3x6mmE102E10233Rear Shock = Long Spring1Note the shock mount holes used.Set rear shock positionLearn about shockadjustment (damping,springs, preload)- 27 -

8.0 CENTAX ASSEMBLYSTEP 8.1 BAG 24IMPORTANT!Tighten flywheel nut securely.IMPORTANT! Use the cone that comes with your engineSTEP 8.2Learn about clutchshoes and flyweights- 28 -

STEP 8.3Initial clutch spring tension1.5mmSTEP 8.42nd Gear23T211st Gear17TSTEP 8.5BAG 25F13M3x12mmAB5.2mm5.0mmIMPORTANT! Install thrust bearingplates as shownALarge inner dia.BSmall inner dia.F13- 29 -

STEP 8.6ADJUSTING THE CLUTCH GAPA1Install only the clutchbell and the thrustbearing assembly on the engine crankshaft. Push theclutchbell onto the clutch shoe, and then measure the distance A as indicated.PushB23Pull the clutchbell away from the clutch shoe, and then measure the distance B as indicated.The clutch gap is A – B; the correct gap is 0.7mm.If the clutch gap is greater than 0.7mm, you can easily calculate the thickness of shimsrequired to set the correct gap:Thickness of shims required (in mm) = A – B – 0.7For example, using the values A=1.3mm, B=0.3mmShim thickness = 1.3 – 0.3 – 0.7 = 0.3mmPull4Place shims between the outer thrustbearing plate and the rim of the thrustbearing carrier asshown.ThrustbearingThrustbearing carrierLearn about clutchshoe gapPlace shims hereSTEP 8.7M115x8x0.1mm5x8x0.3mmU45x10mmPlace small shims to remove allbut a small amount of end playADJUSTING THE END PLAYU4U4M11Learn about clutchend play- 30 -

9.0 FINAL ASSEMBLYSTEP 9.1 BAG 26EF19M4x10mmF13M3x12mm 2F132F13Adjust gear mesh to proper gap.EF191EF19STEP 9.2BAG E11, UE11M3x8mmE28M3x14mmU35x8mmV35x8mmCompleted assemblyE112V3U31E11V3E28E112- 31 -

STEP 9.3 BAG 27E18M4x8mmH17M4x6mm2E1851Side belt tension adjustmentLooser4Tighter6H173STEP 9.4BAG 28, 29, E11, E12C52.5x10mmE11M3x8mmE12M3x10mmH8M3x3mm3Carb LinkageCut one of the long pieces to 5cmBrake Linkage564H812C57E12H8Use the following servo armswith these brands of servos.23 - Sanwa / KO / JR24 - Hitec25 - FutabaE1189E1110Completed throttle/brake linkage- 32 -

STEP 9.5IMPORTANT! Before installation, checkthat fuel line and pressure line are freefrom debris and not blocked.STEP 9.6Mounted foam tires not includedRear tires (wide)Front tires (narrow)- 33 -

STEP 9.7G19M4x10mmSecurely attach a AAA 5-cell receiver battery pack tothe battery tray (not included).Note: Serpent offers the pre-built 5-Cell battery set(#801173) for the Serpent 720. For more information,see the appropriate product page on serpent.comG19- 34 -

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Serpent Model Racing Cars BVSpaarneweg 12E, 2142 EN, CruquiusThe Netherlands, Europe#803101 - Version 1