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Thread: Locked up motor

  1. #1
    RC poster
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    Oct 2019
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    Locked up motor

    So after many packs , 4S primarily , I got a motor nearly locked up , I can turn it with a wrench by the gear but not by hand. No warning of overheats ever, itís been cold here. What the heck happened here ? I do run in wet conditions but always clean , blow down and WD 40 generously after each session .
    Any ideaís ?

  2. #2
    RC Qualifier Rocketzx1's Avatar
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    Open it up and see. Canít really tell unless you visually inspect the motor.


    Sent from my iPhone using Tapatalk

  3. #3
    RC Racer
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    My friend runs in the wet alot and always cleans up good afterwards but a few days ago he locked a motor up on his v1 erevo (used to be mine). His never got hot until the day it died. When he tore it down it was destroyed inside. Not sure what caused it

  4. #4
    RC poster
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    Same thing happened to me a few weeks ago.
    Less than about 30 days old, never in a deep puddle, some snow running, but always sprayed down with air and wd40'd everything down before and after the run.
    I disassembled the motor and found the windings from the inner rotor coming off and binding the 2 pcs. Traxxas will want the motor and esc if you decide to go that route. I found a new motor for 70bucks and has been running fine since then.

  5. #5
    RC Champion
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    if caught when starting to bind - before bearing failure -
    after bearing failure the kevlar magnet wrap will fail

    Brushless motor bearings need periodic maintenance - maybe 40 - 60 runs
    Clean and lube with brushless motor bearing oil

    https://www.ebay.com/itm/Team-Trinit...0AAOSwsxFeFs2~
    fabricator

  6. #6
    RC poster
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    Quote Originally Posted by CrazyXMAXX View Post
    if caught when starting to bind - before bearing failure -
    after bearing failure the kevlar magnet wrap will fail

    Brushless motor bearings need periodic maintenance - maybe 40 - 60 runs
    Clean and lube with brushless motor bearing oil

    https://www.ebay.com/itm/Team-Trinit...0AAOSwsxFeFs2~
    Well that makes sense, I disassembled the motor and found signs of rust as well as the destroyed liner as predicted. So in order to lube those bearings can you just drop oil on the shaft ends with the motor removed or do you have to disassemble the motor to properly service ?

  7. #7
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    I might add that the truck had been submerged briefly a couple of times and I did my best to drain and dry but I could see water getting in the motor. Also I was somewhere in that 40-60 run area. Should I be servicing all the diffís at this point as well ?

  8. #8
    RC Champion
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    best to disassemble to thoroughly clean the bearings before oiling
    service diffs whenever - notchy
    fabricator

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