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4000 Problem Fix (In some situations) Expand / Collapse
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Posted 3/8/2011 8:09:15 AM
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Last Login: 3/8/2011 7:50:53 AM
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I have seen alot of posts that basically outline the same problem with the Dremel 4000. So i decided to make this post so that it might help out some people when they have certain problems with there tool. So here goes....

If you have a Dremel 4000 and the tools engine revs low then high then back to low again. If the tool makes a clicking noise when running. If you have used the tool the day before and you come in and it will not power up the next day. Then your bushings may not be properly touching. In order to fix these you will need a BIG FLATHEAD SCREWDRIVER and some patience....

There are two BIG plastic screws on your 4000. One on the top, one on the bottom. Plug your machine in and tighten those down with a BIG flathead screw driver. Do not overtighten them or you will strip the screws.

IF when you are tightening the screws the Dremel comes back to life tighten it a little more until you get the proper RPM's for the setting you have on the dial.

IF you tighten them down and it does not come back to life. Unplug your machine and take one screw out at a time. Look at the bushings to make sure they are lined up right. Then tighten them back down.

Overtightening the screws will result in the same problem. The machine will not run if these big screws are overtightened. So according to your machine loosen or tighten the screws and 9 chances out of 10 it will come back to life.

If not take it back to where you got it. I had a 4000 that had motor issues and 20 days after i bought it Home Depot took it back, without the receipt and replaced it and now i have been using this one everyday for the past 4 months.

Alot of people don't really know that it is better to break in a Dremel Tool. If you can start it out at the lowest setting. Let it run there for a while. Then push on up to a higher setting. 10-15 minutes of breakin running will sometimes save you the problems of having to replace them every month.

Enjoy,

DD

Post #7731
Posted 3/8/2011 11:21:57 AM
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Hi
Thanks for the tips, I'm sure many will benefit from them.

I've just received my 4000 back after being away only a few days, what a fantastic service from Bosch, they replaced the complete thing in less than a week.

I'll follow your tip about breaking it in just to see if this one lasts any longer than the 10 minutes of the last one.

UKTech

Has anyone found my marbles?
Post #7732
Posted 3/22/2011 2:02:13 PM
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I think you mean "brushes" instead of "bushings".
Post #7758
Posted 5/2/2011 10:12:45 AM
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Last Login: 5/3/2011 8:43:43 AM
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Hi.
I just got a dremel 4000 for my birthday.
And I must say im not to happy about the quality.
The engin dosent run "smooth", it dont run at a constant speed.
So the RPM is not stable and this is very disturbing when doing fine work.
And when it jumps up and down in speed there are thees twitches in the machine that is really noticeble specially when putting it flat on a table when running.
I wonder if this is normal for a new machine, and it will be better with time?
Or should i return it to the store?
Post #7835
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