problems with e-rusty HOT!!

[beason]

i got a e-rusty, basicaly all stock. i put a new traxxas stinger 20 turn motor on it. 81t spur. 22t pinion. it drives fine (from what i can tell, only my second electric truck) the problem I'm having is not even half a battery and the motor and esc are WAY hot! like i can see a bit of smoke comming out of it. i let it cool the cleaned it out with some carb cleaner, but it wasn't that dirty (its only been ran about 3 batts worth) i did a "breakin" by running it in some water for about 30 seconds, then drying it out and running it on an almost dead battery for a few minutes. (best i could do i dont have all the cool electric stuff.)

what could be causing the heat? is it a bad motor? (remember its brand new) is the gearing to steep? (i dont know what is stock)

anyone have a rusty that can giv me some insight?? thanks!!

 

[HeartBreak]

Is your gear lash set too tight? How about a drop of oil on the bushings/bearings? Next thing to check is, how about the transmission? Does it spin freely?

Do the rear wheels spin freely?

Just a hair of binding is enough to cause the heat that you described.

 

[beason]

lash was good, i wd40ed both ends after i dried it out. trans spins freely so do wheels. doesn't pull ether....


I'm stumped.

 

[SMaxxin]

I would say your over geared. I think the stock gearing is 18/84. The stock pinion is 18 but I'm not positive about the spur.

 

[beason]

thanks.. i guess thats the prob.. now i gotta figure out wether i wanna go new gear or new motor...

 

[HeartBreak]

Yup, I'd say you're geared WAY too tall on that motor. Generally, you want to drop about a tooth every two winds down (at least, thats' been my theory). An 18 sounds about perfect on that motor. I'd try that before replacing the motor. You never know; it might surprise you.

 

[beason]

if i drop the pinion I'm still running a 81 spur. will that be to high?

 

[MonsterCowpower]

If all moving parts in the tranny spin free,and all is smooth.To tall gearing is almost always the cause of high motor/ESC temps.

Get a smaller pinion.22t pionion now,get one around 14-15t.

Unless you installed some crazy mad monster truck wheels on sone adapters you should be fine.

 

[SIRMAXXALOT]

you might want to take the motor apart and clean that comm up a little too, a nice eraser should clean it up...and yes it sounds like it is way over geared like the others said,the mod motrs need the low gearing to get those RPM's up.

 

[SMaxxin]

thanks.. i guess thats the prob.. now i gotta figure out wether i wanna go new gear or new motor...

Either way you will need to get a new pinion. If you keep the stinger I would suggest a 17t and keep you 81t spur. If you go with a mod motor you would most likely have to get a smaller pinion. Don't forget these gears are 48p.