Servo Problems

[rakmek]

I purchased a new Stampede, later that night I blew out the plastic servo that came with the car. The next day I went to out local hobby store and purchased (per thier recommendation) a Hobbico CS-70MG servo. Purchased a GS Servo Saver (HRC) - Purple. The next day I blew out the saver as well. Now im not being that aggressive with the car so not sure what it up.

The next day I went and purchase yet another servo saver, and a extra just in case. However after doing some investigating I have noticed that, when the car turns, where the turnbuckles meets the wheel, that screw is hitting the axle. Also noticed that the car turns alot more than it should, for instance the tire will rub on the car as well, because it is turning so much.

The problem is when the bolt hits linkage the servo is so strong that it forces the saver up into the air, which must of broke it in the first place. I have tried several adjustments, driven the car a total of a dozen times, and already spent more time working on it, and over 75 dollars just repairing it.

I do not know where to go to from here, any input would be wonderful. For instance is there a way to adjust to servo so it will not turn so much?

[someone]

The only thing I can think of is to adjust the turn buckles. If that dosen't work I dont know what to say. Maybe make them longer.

[rakmek]

Yea I have adjusted the turnbuckles, but cannot seem to get them correct. It actually seems as though the server just turns to much, no matter how I adjust them they still hit. really driving me crazy

[crazyrcer]

One thing that might work is doing a wide conversion, but it would cost like 30-40 $$s, and it might not work.

[ksholder]

Are you sure that you put the servo saver, the linkage arms and the nuts in the correct order? When I replaced my servo, I put the arms on top of the servo and this caused clearance problems. The proper order is - from the bottom to the top assuming the truck is on its wheels - screw, linkage arm, servo saver, washer & nut.

Also, be sure that you have properly centered the servo. This involves turning on the radio, turning on the truck and the servo will self-center. When you do this, you want the servo trim in the neutral position (middle of its travel). If, when you do this, the servo saver does not appear centered you need to pull your servo save off the splines of the servo, recenter the servo, be sure that the steering trim is neutral then reattach the saver.

If this does not solve the problem, I would check to ensure that the servo saver is compatible with the truck. It should look pretty much like the stock saver, but it will probably function better.

[razer]

If you're using the stock front axle carriers with 2 mounting positions, try the other position. This will probably require re-adjusting your steering turnbuckles.

If your servo saver has more holes for mounting the steering linkages, you could try changing that as well.

The easiest way to adjust your steering would be with the steering EPA (end point adjustment) on your transmitter if it has that feature. I don't think the stock radio gear has that feature.

Check & make sure that you have the front wheels on the front & the rear wheels on the rear. They have different offsets & if you switch them it can cause steering problems.

[rakmek]

Right now the the nut is closest to the underside chassis of the car, then the saver then the turnbuckles followed by the screw, to my best knowledge this is how the manual showed to put it together.

The servo was turned on and centered correctly before I centered it.

I did move it out to the next linkage by the tires, and was unable to get a desired turn radius on it, it would push the tires into the axle even more.

The kit was a RTR vehicle, so hopefully they did have the tires on correctly.

What im really wondering is if the servo is not a correct servo for this vehicle. It just seems to turn too much, it turns alot more than the stock servo that came with it.

also the servo saver im using is a GS and is compatible, I even purchased a traxxas servo saver that had the extra inserts and it still pushes into the axle.

[ksholder]

It sounds like you put the new servo saver on correctly. Does this saver have several mounting holes for the arms? If it does, have you checked to ensure that where you have the arms mounted does not extend further from the centerline of the servo spline gear than the stock? Usually there are several mounting possibilities. If this saver is wider than the stock and you have mounted the arms further out than the stock position, it could cause problems, but usually you would have alignment issues in this case.

You can tell the front wheels from the rears in that the fronts have a deeper dish when viewed from the front of the wheel face.

[rakmek]

Ill check the wheels just to be safe, not sure what the chance of them putting the wheels on incorrectly in a RTR kit is.

The saver im using is a traxxas servo saver, it is exactly the same as the original saver tha came with the car, i have it mounted in the same holes, as well. I tried the holes closer to the saver screw but did not accomplish anything.

I will most likely dismantle the front tonight again and see if perhaps just the turnbuckles are incorrectly setup.

pehaps this would be the best question to ask in all of this....

Is it natural for the bolt that holds the turnbuckle on the front tires to hit the axle when it turns? Its just when it does this and hits hard that the servo puts so much force that it tries to raise up the servo saver. which is how i broke the second servo saver.

[stampede720]

The servo and servo saver are fine. I have used a hitec HS-645(CS-70 is rebranded version of this) and a red GS saver with no trouble whatsoever.

I agree with razer, this sounds like you have the wrong holes on the steering knuckle. Something on the caster block could be shaved down as well, theoretically, I suppose, but I doubt it.

720

[rakmek]

Well ill try the different holes, however unless they shipped it out put together wrong then im using the correct holes. That is what baffles my mind so much.