ls1velle

We were running my sons Rustler with a 12t 550 motor today and now it does nothing. We are running a traxxas 7 cell hump pack as the specs say it will handle 8.4 could this be to much and fried to motor. I tried hooking it direct to the battery and still nothing. Any help would be great. He's not ready for brushless yet so suggestions in a replacement motor are also great.

BrickitSAM

find your local hobby shop and buy a new one, or go on amazon, they are around $12. But it kind of sounds like you ESC is done, if the motor does not do anything, no even make a sound, your ESC might be burnt out.

buggybattle

Rcmart sells a skyrc speedo with brushless motor for under 60 bucks. I would just upgrade. As for being ready.... Just lower the EPA on the throttle side.

Bri

The Traxxas Titan 12T usually lasts about a year. If you put power directly to the motor and nothing happens, then the motor needs replaced. You can get them cheap enough if you shop around. You might check your motor temps to be sure you don't go over 180 degrees. If the motor is running hot, then you can gear down a tooth or two on the pinion gear.

Best regards,
Brian

Igottabeme

Brushed sealed can motors like the Titan are disposeable motors they burn up or the brushes wear out you chuck them in the garbage and get another one. The only brushed motors I would use in a 2wd stadium truck are the HPI Firebolt 15t or the Reedy Radon 17t. A brushless motor around 3000kv would not be that much faster than a Titan. It could be geared to acheive the same speed or of course go faster. There are alot of options out there for cheap brushless setups so I hardly ever run anything brushed anymore (except a couple minis).

ls1velle

Thanks guys for the help. I'm picking up a new motor tomorrow. I'll update you if everything works out

billdelong

iTrader: (33)

+1

I would invest in a temp gun and regularly check the following limits:

Battery < 120°F
ESC < 140°F
Motor < 160°F

If any of these temps go above the limit, then it's time to rebuild the car, check for worn/seized bearing, anything binding and/or simply a worn motor.

ljl23

iTrader: (11)

Is the truck relatively new? if it is, Traxxas is usually pretty good about 1) figuring out your issue or 2) giving you free replacement. I had a 7 cell Traxxas battery that went out, it was like 6 months old, I didn't have a receipt or anything for my Stampede but Traxxas replaced it.

ls1velle

So I got the new motor in and everything seems to be good so far. I did some temp readings after the last run indoors.

ESC 120.2
Motor 190.2

Does that seem a little high on the motor side? Maybe a bad bearing somewhere?

ta_man

iTrader: (168)

Yes that is high on the motor.

flysullivan

iTrader: (31)

Go with a pinion hear that is smaller (has less teeth). You need to be around 120 on that motor.

Bri

You can be in the 160 to 170 temp range without any problems. I run in an outdoor spec SLASH class and the Titan has held up really well even on really hot days. I would go down a tooth or two on the pinion gear to get the temps down a little bit.

Best regards,
Brian

ls1velle

It has an 86/19 ratio right now. What do you guys run?

kevinatfms

iTrader: (10)

Try 18/86 to start. Im surprised that its overheating even on 19/86 though. Is the slipper tightened all the way down? Check the slipper adjustment nut for correct preload. I believe Traxxas calls for 1/4 to 1/2 turn off from full tight for correct preload.

If its too tight it will cause more stress on the motor(since it does not slip) which then increases motor temps.

ls1velle

I'll try that, thanks.