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stuck plunge base on Porter Cable 690 router

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Forum topic by 3006ED posted 07-26-2016 08:54 PM 394 views 0 times favorited 8 replies Add to Favorites Watch
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3006ED

5 posts in 673 days


07-26-2016 08:54 PM

Topic tags/keywords: plunge base stuck base porter cable 690 repair plunge base router

I have a plunge base on my 690 PC router. As I find there is a new base in 2016 this is the earlier design. The plunge is stuck in the retracted position. I have placed the locking lever in the open position and did a lot of tapping on the base and it doesn’t move to the raised position. Unless someone has a better idea, I’m assuming the base needs to be disassembled. But I am at a loss as how to open it up.
Any suggestions or instructions?
Thanks,
Ed


8 replies so far

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teejk02

424 posts in 589 days


#1 posted 07-26-2016 09:51 PM

I think the instructions are pretty clear but may fail in that they make it sound more complicated than it is. First thing is to get a clean surface and floor because there are a few washers and stuff that you’ll need to put it back together. Take your allen wrench and remove the screw from the top. Then start tapping in the hole with that supplied allen wrench. Keep moving the tool around at various angles and that plate will drop. After a few trips it will wear to the point where it won’t be a big deal. That little plate will wear in.

View jwmalone's profile

jwmalone

769 posts in 166 days


#2 posted 07-26-2016 11:39 PM

You need a bigger hammer.

-- "Boy you could get more work done it you quit flapping your pie hole" Grandpa

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3006ED

5 posts in 673 days


#3 posted 07-27-2016 12:06 AM

I think I have been misunderstood. I am not talking about the crescent shape plate that is used to keep the base attached to the motor. I am talking about the spring loaded plunging part, the two steel rods that move up and down in the bushings to change the cut depth.
And yes the crescent plate is a pain but that is no what I’m talking about.
Ed

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teejk02

424 posts in 589 days


#4 posted 07-27-2016 12:43 AM



I think I have been misunderstood. I am not talking about the crescent shape plate that is used to keep the base attached to the motor. I am talking about the spring loaded plunging part, the two steel rods that move up and down in the bushings to change the cut depth.
And yes the crescent plate is a pain but that is no what I m talking about.
Ed

- 3006ED

Ok then…that is different…I have 3 690s’s (dunno why other than I love them). Truth be told the “690” refers to the router motor body and not the base (unknown to me until I bought my last one) but that is just trivia. Guessing you have the “lever-lock” on the body of the base (more trivia is that the older bases had what I would describe as a monster thumb screw that I prefer). If you got the locking plate/washers etc. out then the motor should simply turn out of the base after you release the base tightener. There are pins built into the housing that ride in grooves machined into the base…I have never had to disassemble the base itself. As an aside, I bought my last 690 solely because I got tired of changing between fixed and plunge on machine #2.

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3006ED

5 posts in 673 days


#5 posted 07-27-2016 03:14 AM

Nope, think lower. This has nothing to do with the motor portion in any way. The lower part of the base will not allow the upper part of the base to snap back to the return (non cutting) position.
When I get to my shop I’ll take some photos and add arrows to show what I mean.

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bigblockyeti

3668 posts in 1185 days


#6 posted 07-27-2016 03:32 AM

Has it ever been dropped. Of the bases I’ve taken apart and repaired, the ones that were dropped bent the bottom plate ever so slightly and locked it up where it wouldn’t move smoothly or at all. There are two bronze bushings on each stanchion and the tolerances are fairly tight, if they get dirty and gummed up, that too can allow it to seize. Disassembly is your best option, exploded diagrams are available many places on the web.

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3006ED

5 posts in 673 days


#7 posted 07-27-2016 12:18 PM

I will check to see if the plate is flat before I disassemble it. Thanks for the input.

View teejk02's profile

teejk02

424 posts in 589 days


#8 posted 07-27-2016 08:00 PM



Nope, think lower. This has nothing to do with the motor portion in any way. The lower part of the base will not allow the upper part of the base to snap back to the return (non cutting) position.
When I get to my shop I ll take some photos and add arrows to show what I mean.

- 3006ED

ok…got it now. Just a problem with the base itself. Pulled mine (6931 type 2) out of the case today to get an idea and came up empty. Sounds like something got bent or needs a bit of penetrating oil or something broke off and is causing the binding. That return spring is pretty strong.

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