LumberJocks

Dewalt Dw618 motor is noising and lost power

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by Valete posted 01-03-2016 09:31 PM 740 views 0 times favorited 10 replies Add to Favorites Watch
View Valete's profile

Valete

71 posts in 919 days


01-03-2016 09:31 PM

This weekend my Dw 618 started to make a different noise (sounding really nasty) and lost your power. I immediately turned off and open the cap to see if was anything broken or burned. It’s seems everything is ok. I’d spin the center post (communicator?) It spun freely it didn’t feel like it was grinding on anything.

Are these brush motor heads bad? This may be the problem?

Please, check this video also. Is seems to have abnormal spankings around the spindle.

https://www.youtube.com/watch?v=_-CyXYR5Hxc


10 replies so far

View MrUnix's profile

MrUnix

4203 posts in 1659 days


#1 posted 01-03-2016 09:43 PM

First off… ARE YOU NUTS? Running that motor without one side of the armature being supported is a disaster waiting to happen. That upper bearing isn’t being held in place so the armature is just flopping around. And you are surprised that you are getting sparks? Hopefully, you didn’t trash it too bad.

Clean things up and replace the bearings. The brushes look fine.

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

View dhazelton's profile

dhazelton

2322 posts in 1756 days


#2 posted 01-03-2016 10:04 PM

What he said – you had a motor spinning on one end like a top and the commutator was wobbling ever so slightly.

A lot of life in those brushes, although it looks unevenly worn so I’d guess the commutator is dirty or burnt and needs to be dressed which a motor shop can do for you.

View dhazelton's profile

dhazelton

2322 posts in 1756 days


#3 posted 01-03-2016 10:09 PM

....also, watch this and read the 2nd comment from Random Eddie

https://www.youtube.com/watch?v=MkBLwUG_AdU

View RichardDePetris's profile

RichardDePetris

45 posts in 1145 days


#4 posted 01-03-2016 10:36 PM

Você parece ter um desejo de morte . Não brinque com esse motor assim. Ele pode feri-lo gravemente .

It’s hard to say exactly what’s wrong. If the brushes aren’t seated correctly, they can spark. By running it with the top off, they can spark. But, I notice some exposed bare copper on brush wire. It could be causing a short with the brush housing, in particular the spring. Usually, brush leads are not insulated, but yours is. Put some electrical tape over it.

Before putting it back together, look at the commutator contacts and check its condition. If it is dirty clean it by wiping it with some alcohol. Make sure you don’t use the alcohol on any other part of the commutator as it will dissolve the non-conductive coating.

View johnstoneb's profile

johnstoneb

2143 posts in 1632 days


#5 posted 01-03-2016 11:08 PM

If the commutator wasn’t bad before it is now.

-- Bruce, Boise, ID

View Valete's profile

Valete

71 posts in 919 days


#6 posted 01-03-2016 11:31 PM

Thanks for advice guys. I will not turn it again without cover cap.

I realize now that speed control isn’t working also. Make sense, why the motor don’t rotate to your full rpm due the commutator problem, speed control can’t change speed.

I will sent him to a Dewalt service tomorrow, it’s more complicated to me than simple change a pair of brushes.

View wunderaa's profile

wunderaa

243 posts in 1662 days


#7 posted 01-04-2016 12:49 AM

was going to post about safety, but MrUnix beat me to it. Best of luck getting it up and running again…safely!

Hopefully just a dirty commutator or bad brushes.

View Slemi's profile

Slemi

103 posts in 1001 days


#8 posted 01-04-2016 02:39 PM

100% the rotor is dead. There is short between two of the poles. If You take it out, You will see it is eroded at the point of failure. That’s why the brushes are so eroded.

View Valete's profile

Valete

71 posts in 919 days


#9 posted 01-04-2016 03:45 PM



100% the rotor is dead. There is short between two of the poles. If You take it out, You will see it is eroded at the point of failure. That s why the brushes are so eroded.

- Slemi


Slemi, thanks for prompt answer, this make all sense. Do you think that a way to fix it, or i will need to buy a new complete rotor?

I ask why, I bought this router in USA and now I live outside USA and here we don’t have replacement parts for this product because Dewalt don’t sell it here.

View Slemi's profile

Slemi

103 posts in 1001 days


#10 posted 01-04-2016 03:53 PM

There is some local handyman sometimes, who rewinds rotors. Check at your place. Maybe order it online? There just isn’t simple solution for this. Also I don’t know why this happens. You can write where You live and someone can help You.

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com