Makita 3612BR does not plunge - Router Forums
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post #1 of 20 (permalink) Old 09-19-2019, 04:16 PM Thread Starter
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Default Makita 3612BR does not plunge

Hi,
My Makita 3612BR does not plunge.
Those 2 metal rods seem to have some rust on them and the router cannot move up or down at all. I am trying to remove that bottom part to polish those metal rods but I have not found any advice online. Can someone please tell me how to take that thing apart?
Thanks,
Ed
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post #2 of 20 (permalink) Old 09-19-2019, 06:28 PM
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The ones I've taken apart you just keep unscrewing the adjuster rod until it lets go. There is a problem that can be avoided in that process. There is also a small brass button in the column lock mechanism that keeps the steel screw from damaging the column. Unless you keep that side down the button can fall out and be easily lost. I know this for a fact.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #3 of 20 (permalink) Old 09-20-2019, 11:19 AM Thread Starter
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Thanks for the quick response.
What exactly is the "adjuster rod"? I checked the diagram and that term is not even on it.
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post #4 of 20 (permalink) Old 09-20-2019, 11:51 AM
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He means the side where the height adjustment is made (hence adjuster rod) just keep unscrewing it.
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post #5 of 20 (permalink) Old 09-20-2019, 12:00 PM Thread Starter
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Well, that darn thing doesn't move at all.
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post #6 of 20 (permalink) Old 09-20-2019, 12:11 PM
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Use PB fluid, for about 10 minutes. It will move, PB is way better at loosening than WD 40.

EDIT:: This stuff, will loosen just about anything.
https://www.routerforums.com/cnc-rou...ml#post2047913
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post #7 of 20 (permalink) Old 09-20-2019, 02:58 PM Thread Starter
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I don't have PB fluid, I used DeepCreep for several hours now and no dice.
I probably need to get 2 hex nuts and tighten them together and try turning them.
Any other ideas?
Thanks,
Ed
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post #8 of 20 (permalink) Old 09-20-2019, 03:44 PM
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You never filled out your profile Ed so I don't know how much experience you have with it so starting with the basics, make sure the column lock isn't engaged. If you can't turn the adjustment rod it may be because the base is stuck, not that the threads stuck in the threaded portion of the body. Trying to force it in that case could wreck something. If you were using it under a table the problem is likely that sawdust has gotten in the tubes and jammed them. I had that happen on a Hitachi M12V. I had to keep tapping on the base with a rubber mallet or a plastic dead blow type hammer. It eventually loosened that way and I was able to empty the housing and clean the columns.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #9 of 20 (permalink) Old 09-20-2019, 04:05 PM Thread Starter
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Chuck,
My experience in a word: Zero! That'll probably explain a lot.
I got this thing from a friend with the vague explanation: doesn't seem to work. I put the connector in an outlet and it worked. So me: great, it works after all. Didn't know about the plunging part. Now I do.

I believe, as you suggested, that the columns are frozen inside the body.
But why would that cause the adjustment rod to freeze also? I don't understand the connection. Even if the base is stuck, the adjustment rod should come out on top, or?

Sorry for being dense.
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post #10 of 20 (permalink) Old 09-20-2019, 04:18 PM
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Quote:
Originally Posted by router king View Post
My experience in a word: Zero! That'll probably explain a lot.
Hi Ed and welcome to the forums....
we can help that zero thing....
head over to this link for some light reading....

word of caution...
keep WD40 as farawaay from your router as possible...

This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

Stick....
Forget the primal scream, just ROAR!!!
"SNORK Mountain Congressional Library and Taxidermy”
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