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Model Forum / Radio Controlled / Land Models / August 2005HELP with servos
I put a Hitec 645MG on my RUstler and now the steering is out of whack and I'm not sure how to fix it. Can anyone help me? Yes, we can probably help you but you will have to tell us more then "out of whack". Out of whack how? What happens when you turn left or right? Do the wheels point straight when not turning? > Yes, we can probably help you but you will have to tell us more then > "out of whack". Out of whack how? What happens when you turn left or > right? Do the wheels point straight when not turning? Well, I have to turn the steering trim all the way to one side until the knob won't turn anymore and the tires will still not be straight. It turns more to one side than the other. >> Yes, we can probably help you but you will have to tell us more then >> "out of whack". Out of whack how? What happens when you turn left or [quoted text clipped - 3 lines] > knob won't turn anymore and the tires will still not be straight. It > turns more to one side than the other. The servo horn isn't aligned on the servo properly, OR the servo horn has the wrong internal threads for the servo type and has stripped itself. Take the horn off, center the servo trim, center the wheels, then put the horn on and tighten er' up. Doc >>> Yes, we can probably help you but you will have to tell us more then >>> "out of whack". Out of whack how? What happens when you turn left or [quoted text clipped - 11 lines] > > Doc What is teh servo horn? The white disc thing? I had to swap out a small round gear in the middle of the white disc to make it line up right so I don't think it has the wrong threads. Can hitting a bump knock the steering off a little? So far it should be running fine I havn't had a chance to run it since last night so I won't know until tomorrow when I get some time to run it. > What is teh servo horn? The white disc thing? I had to swap out a small > round gear in the middle of the white disc to make it line up right so I > don't think it has the wrong threads. Can hitting a bump knock the > steering off a little? So far it should be running fine I havn't had a > chance to run it since last night so I won't know until tomorrow when I > get some time to run it. The servo horn is the white disc thing, yes. Yours has a circular horn, some are "L" shaped, "T" shaped, etc. If the servo horn isn't on right, the steering will be all out of whack and will be impossible to center, and the truck turn better in one direction than the other. 1. Remove servo horn from servo. 2. Turn on all electronics and center steering trim 3. Visually make the wheels straight and the pop the servo horn on and tighten down. 4. Turn off electronics. If you're off by even one tooth one way or another it'll be a bit wonky to center. Yes, hitting a bump can knock the steering off a little, but you'd really have to bap it hard. This can cause servo gears to jump, strip or break, throwing the steering off. This can also cause the servo horn to jump a tooth on the servo gear and throw stuff off as well. Doc >> What is teh servo horn? The white disc thing? I had to swap out a small >> round gear in the middle of the white disc to make it line up right so I [quoted text clipped - 23 lines] > > Doc That is probably what happened, I got it centered for now I hope it stays centered. Once I find a good track around Columbus, OH to do some practice runs at I'll look into a nicer truck and a BL motor. I know this belongs in the .air group but just wanted to add, for now I'm saving up for an F-27 Stryker made by Parkzone. After that Ill get some Dirthawgs and an Atomik prepainted F-150 body and I think I'll be set for a while to have fun, this hop up fever really hits the wallet hard. > I put a Hitec 645MG on my RUstler and now the steering is out of whack and > I'm not sure how to fix it. Can anyone help me? Take the servo arm off. Straighten the trim controls on the radio with the power on. Straighten the wheels, and put the servo arm back on. Then adjust with the trim on the radio, and with the threaded rod that goes from the servo arm to the stearing bellcrank. Don't feel bad if you have to use the radio trim setting. There isn't person from Joe Blow to Jared Tebo that can get the car to the drive perfectly straight without a little trim. >I put a Hitec 645MG on my RUstler and now the steering is out of whack and >I'm not sure how to fix it. Can anyone help me? I'll concurr with that................I have the steering trim on my Savage set 45* off from center, and this is with the servo horn centered. The amount of toe a vehicle has, and what direction the toe is (in-out) also has an affect on how much trim might need to be used to center the steering. I'm running 2* toe-out on the front and 1* toe in on the rears and she pulls to the right due to the chassis torquing under full power without the trim set a bit off. Doc > >I put a Hitec 645MG on my RUstler and now the steering is out of whack and > >I'm not sure how to fix it. Can anyone help me? [quoted text clipped - 8 lines] > > Doc Hi, can I ask why you are running toe out on the front? Does the truck not turn into corners very well otherwise? I normally run toe in on all 4's purely to keep the car running as straight as possible (at higher speeds). I haven't run my savage yet (but ran the first tank of fuel through the engine yesterday) and have mine setup with both fronts and rears setup to have about a degree of toe in. If your not having trouble with turn into corners, maybe the problem you have with your truck pulling to the right might be the toe out at the front? Cheers Dre > Hi, can I ask why you are running toe out on the front? Does the truck > not > turn into corners very well otherwise? Everything I've read has said that toe-out in front and toe-in on the rears for max straight-line stability. Experience has proved this correct, at least for me. I figured out that the right-pull is just the rears loosing traction on concrete then grabbing before it spins out. Doesn't do it on grass or dirt. Might be switching to limited slip or a locker to get rid of that........... Doc > > Hi, can I ask why you are running toe out on the front? Does the truck > > not [quoted text clipped - 9 lines] > > Doc Howdy! If it works for you, leave it :) I have a degree of toe in on all fours and my truck drives straight as well... Well I drove my Savage for the first time on the w/e. Still running the engine in, but DAMN, this thing is going to haul arse! Its allready wheelspining all 4's on the gravel with less than half throttle and I've only leaned the engine out an 1/8th of a turn :) Suspension I allready know needs new springs and different shock oil, its fun atm, but way too soft. Its also shifting into 1st way too early but I'll wait till the engine is tuned first. I reckon when its tuned it'll hit second in about a second after take off! Both need a fair tighten... As far as the diffs go, your not wrong, when you have the thing on 2 side wheels, look out, the 2 wheels in the air go ballistic and balloon the hell out of the tires :) I'm going to try some much thicker oil in ther first and I'm going to try some oil from my Inferno, basically same diff, but they are *much* tighter... Cheers Dre Inline.......................... > Howdy! > [quoted text clipped - 6 lines] > wheelspining all 4's on the gravel with less than half throttle and I've > only leaned the engine out an 1/8th of a turn :) Yeah, these things scoot! What motor did you go with? > Suspension I allready know needs new springs and different shock oil, its > fun atm, but way too soft. I just slapped some SAE30W motor oil in there this afternoon for sh.ts and giggles, and although I haven't run it yet, it stiffened up the shock response quite a bit (not spongy like with the silicone oil). >Its also shifting into 1st way too early but > I'll wait till the engine is tuned first. I reckon when its tuned it'll > hit > second in about a second after take off! Both need a fair tighten... 2-speed or 3-speed? I had a bugger of a time with the 1-2 clutch on mine....had to dissassemble/reassemble over a half-dozen times to get it just right. I want to slap some 40 series tires on her, but knowing that I'll have to readjust the tranny has me putting that off indefinitely. > As far as the diffs go, your not wrong, when you have the thing on 2 side > wheels, look out, the 2 wheels in the air go ballistic and balloon the [quoted text clipped - 3 lines] > they > are *much* tighter... You think that's fun, try a reverse donut at WOT in loose dirt. It'll pirouette on one rear tire with the other three ballooned to all hell. One of my fave things to do with my truck. I have her really dialed in now, thanks to the bigger cooling head I slapped on her I was able to lean a bit more and really get some nice power out of the motor. I'm so happy with the S-25 when this one pukes I'm just gunna rebuild it and keep on going....... Any more power would be difficult to control and take away some of the fun I think. Doc > Inline.......................... > [quoted text clipped - 10 lines] > > Yeah, these things scoot! What motor did you go with? I ended up getting a K46 and use a 16/48 gear ratio... > > Suspension I allready know needs new springs and different shock oil, its > > fun atm, but way too soft. > > I just slapped some SAE30W motor oil in there this afternoon for sh.ts and > giggles, and although I haven't run it yet, it stiffened up the shock > response quite a bit (not spongy like with the silicone oil). hehehe, I've still got a heap of oil from the Inferno's so all good there. I like your idea about using motor oil though, hehehe :) > >Its also shifting into 1st way too early but > > I'll wait till the engine is tuned first. I reckon when its tuned it'll [quoted text clipped - 5 lines] > just right. I want to slap some 40 series tires on her, but knowing that > I'll have to readjust the tranny has me putting that off indefinitely. Its got a 3 speed, I know you mentioned checking first, but I do have a different enigne so I thought stuff it, I need to strip the truck once its run in anyway to lock tight all the metal/metal screws/tune the shocks, tighten diffs, adjust shift points etc. May as well do it all at once. > > As far as the diffs go, your not wrong, when you have the thing on 2 side > > wheels, look out, the 2 wheels in the air go ballistic and balloon the [quoted text clipped - 14 lines] > > Doc ROFL, righto, thats going to be tried next! Thanks for the idea :) Cheers Dre In-inline........... > I ended up getting a K46 and use a 16/48 gear ratio... That's why the tranny is off. Factory is set for S-25 with 15-49 and stock tires. > hehehe, I've still got a heap of oil from the Inferno's so all good there. > I like your idea about using motor oil though, hehehe :) Shitload cheaper than silicone oil, and if the weight is the same it <should> work the same I'd wager. > Its got a 3 speed, I know you mentioned checking first, but I do have a > different enigne so I thought stuff it, I need to strip the truck once its > run in anyway to lock tight all the metal/metal screws/tune the shocks, > tighten diffs, adjust shift points etc. May as well do it all at once. From the sounds of it you need to bring the 1-2 in at least a 1/2 turn. > ROFL, righto, thats going to be tried next! Thanks for the idea :) Another cool thing I like to do is to endo the front end, pop her in reverse while the a.s end is up in the air, gas it and pull a reverse wheelie.......... Doc > In-inline........... > > > I ended up getting a K46 and use a 16/48 gear ratio... > > That's why the tranny is off. Factory is set for S-25 with 15-49 and stock > tires. yeah I figured it was going to shift a bit early, but it doesn't matter as I am going to take the truck apart majorly to fully dial it in. I'm gathering data atm :) (wheelies, burnouts, endos etc hehehe) > > hehehe, I've still got a heap of oil from the Inferno's so all good there. > > I like your idea about using motor oil though, hehehe :) > > Shitload cheaper than silicone oil, and if the weight is the same it > <should> work the same I'd wager. Yeah I'd be inclined to agree too > > Its got a 3 speed, I know you mentioned checking first, but I do have a > > different enigne so I thought stuff it, I need to strip the truck once its > > run in anyway to lock tight all the metal/metal screws/tune the shocks, > > tighten diffs, adjust shift points etc. May as well do it all at once. > > From the sounds of it you need to bring the 1-2 in at least a 1/2 turn. Roger, I'll start with that then, it really shifts way to early so 1/2 a turn is a good start. > > ROFL, righto, thats going to be tried next! Thanks for the idea :) > [quoted text clipped - 3 lines] > > Doc HAHAHA, I love it :) how the hell do you come up with these tricks?!?!? All I've managed todo is a massivly flukey double front end over end when I slammed on the brakes too hard for the first time, that was funny, then later on that day I did it again, expect the truck did a 180 sideways at the same time. Damn those tires are bouncy :) All great fun though! Cheers Dre >> > I like your idea about using motor oil though, hehehe :) >> >> Shitload cheaper than silicone oil, and if the weight is the same it >> <should> work the same I'd wager. > > Yeah I'd be inclined to agree too We're both right. Works like a charm and took the mush out of the shocks. $1.49 a quart beats the hell outta what silicone oil costs. > Another cool thing I like to do is to endo the front end, pop her in reverse > while the a.s end is up in the air, gas it and pull a reverse > wheelie.......... > HAHAHA, I love it :) how the hell do you come up with these tricks?!?!? Mostly just bashing around the yard, do something stoopid, turns out ok and looks cool hence it's dubbed a "trick!" I've got her tuned to be a wheelie machine (stoich on LSN, a tad rich on HSN with slipper locked down tight) so it's pretty easy to do cool stuff with it. Had her pulling power wheelies from a rolling start at 15mph yesterday! Doc > >> > I like your idea about using motor oil though, hehehe :) > >> [quoted text clipped - 5 lines] > We're both right. Works like a charm and took the mush out of the shocks. > $1.49 a quart beats the hell outta what silicone oil costs. Nice! Added to the list of useful tips :) Thanks! > > Another cool thing I like to do is to endo the front end, pop her in > reverse [quoted text clipped - 9 lines] > > Doc yeah thats how I tend to work them out too. Great stuff. I was going to turn my brakes down cause if you slam them on even when your on gravel (forget it on bitumen, 70%-100% brakes *will* endo it :) and the fronts bite hard, it'll do 2 full front flips in the air *before* it'll land on all 4's :) I found that out the first time I put the brakes on, I set them a little tight from the start, hehehe! Power wheelies from 15mph sounds wicked, I sooooo wish I had more time atm, the only time I can work on my savage is a couple of hours on the w/e so I can only get a few things done to it. First thing I need to do is finish running the engine in so I can tune it and then adjust everything else... Cheers Dre |
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