Strange noise comming from my monster
 

I just ran it a few moments ago and about 5 mins into the run, i started to hear a winding noise but it was only wile staying the same speed or coasting. i heard it comming from around the motor and i took the pinion off and rolled the car down my driveway at a high speed a few times and never heard it but when i put the pinion back on and reset the mesh, it started again.

any idea what it is? i'm thinking it's a bad bearing but am not sure

anyone have an idea?

Maybe the motor has shifted. Do you have a CC motor? If so, you might have twisted the motor and the spikes are hitting the chassis which will warp the pitch of the motor itself, and the pinion might hit the spur sideways. Check from the sides and check that it lines up correctly.

The screw on the pinion gear might have gotten loose..

Transverse planetary solenoid is my guess.....

Gonna have to take it apart sir, we can't really help I'm afraid!

ohh, fun! lol always wanted to see what it looks like on the inside. other than in a picture

It's your lucky day :intello:

Welcome to initiation, put this blindfold on...

haha yea, wish it was for a better reason though.

is their anything i need to watch out for when i do it?

Lots more info would be helpful.

What's the vehicle, does it have a tranny or CD, what motor.

But yes check the motor, the shaft will have a tick back and forth but should not have a 'clunk', and check for resistance spinning the motor shaft while pushing and pulling on it. Where is linc to take that out of context....

And check side to side play on the shaft, again should be VERY little shuck, or none.

thanks! it's a 2200kv mamba monster in an e-maxx. single speed tranny, no CD

Did you check the things I listed? Might be an easy solution.

And did you manually turn the motor? Is the sound coming from the motor itself?

If it turns out to be the motor and you decide to open it, there's not really anything you need to know except to only use a reasonable amount of force with everything you do to it.

yea, you can't tell anything from the outside. and turning by hand it doesn't make a sound. it's only wile it's moving fast. it sounds about like a supercharger does on a car.

Take it apart and check the bearings. If it is making a high pitch whine like a SC, than I would say that that may be the rotor spinning on the inner metal of the bearing. If you pull on the shaft and it has too much give the shaft could have separated from the magnet.

Those are my 2 guesses. If it is the motor that is.

Most likely a bad bearing then. But you can get a complete bearing and stator replacement kit from CC: http://www.castlecreations.com/produ...pair_kits.html

Could be a wonky diff or a pin that worked itself out partway on driveshaft, etc.

Sometimes these things only show up under load...

did you check to see if somebody put a car supercharger on your e-maxx? This all sounds very suspect.........:yes:

What do trannys and Cross Dressers have to do with R/C? How much should one resist spinning their shaft? Such incoherent babble......:lol::whistle:

thanks guy!

redshift-i rolled my car without the pinion gear on the motor down my drive at 20-25mph with no sound. but when the pinion is on, the noise appears but is a LOT more noticable wile holding the same speed or coasting, i can't even hear it when i'm on the gas or brake much.

the only supercharger i see is the big blue brick of a battery :yes:

:oops:

Mr. Dude has to learn some of the finer points. Sometimes you have to get intimate with the inner workings, poke around a bit. Occasionally some sweet soft words can coax the problems out and if you're fortunate, it'll respect you somewhat the day after.

JUST TAKE IT APART!

You could be working on it now, now, and now.

:whistle:

no i can't...been too busy with school and all

Sounds to me like someone has their priorities mixed up :tongue:

Guess it'll stay broke then...

haha or at least untill sunday or monday afternoon. if not then, maybe the next saturday. lol

ok, my plans for today got cancled so i was able to take the monster apart. maybe you guys could spot something?

http://i56.tinypic.com/28hjriu.jpg
http://i56.tinypic.com/28ipax1.jpg
http://i53.tinypic.com/2s0b8tl.jpg
http://i53.tinypic.com/2up6blf.jpg
http://i54.tinypic.com/1eknb8.jpg

the only thing i found was what looked to be a few metal shavings in front of the piece of nylon (i think thats what it is) in the motor. you can see them in the second picture pretty well.

Everything looks normal, but I can not touch it to see if the bearings move, or twist the rotor to see if it is still secured.

And there is no pic of the front bearing as far as I can tell. Weird noises from the motor are usually caused by bad bearings I'm guessing.

the bearrings move fine from what i can tell, but that may be a differant story at high RPM's. the rotor is still attached and their is not much (1mm maybe) play front to back in the shaft.

i'm just going to get new bearrings and see if it fixes it