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Can’t raise saw blade, stuck all the way down: Delta Unisaw

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Forum topic by Sark posted 03-30-2021 04:47 PM 798 views 0 times favorited 10 replies Add to Favorites Watch
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Sark

407 posts in 1444 days


03-30-2021 04:47 PM

Topic tags/keywords: unisaw delta saw blade stuck won’t rise

I lowered the blade to below surface, and now I can’t raise it. Is totally jammed. Can’t turn the crank in either direction. (And not I’m not sure what direction raises it, clockwise or counterclockwise?) Don’t think I’ve ever had this problem before. This is a Unisaw 34-802.

Thanks for your help, which I surely need!


10 replies so far

View 987Ron's profile

987Ron

1109 posts in 400 days


#1 posted 03-30-2021 05:42 PM

My Unisaw L-xxxx something clockwise raises the blade. If lowered to the stop a bit to hard it will stick somewhat but never jammed.

-- Ron

View MrUnix's profile

MrUnix

8563 posts in 3283 days


#2 posted 03-30-2021 05:52 PM

Like Ron said, turning clockwise should raise the blade. Make sure you don’t have the lock knob engaged. If that doesn’t work, just take a peak under the hood and see if the gears are fouled with sawdust and stuff. It’s a very simple setup where the crank turns a worm drive gear that engages with teeth on the arbor bracket.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

View Kudzupatch's profile

Kudzupatch

195 posts in 2293 days


#3 posted 03-30-2021 06:20 PM

Quite sure you lead screw is dirty and jammed up with saw dust and possible some lubricant if someone used liquid.

It is a pain in the rear on mine (1946) to get through the dust door and clean it. I just take the top off and clean and lube everything as once. I lube mine with paraffin wax.

-- Jeff Horton * Kudzu Craft skin boats* www.kudzucraft.com

View splintergroup's profile

splintergroup

5133 posts in 2306 days


#4 posted 03-30-2021 07:00 PM

I’ve had the occasional “stuck down” syndrome on my 1998 Unisaw.
It seems if I’m too vigorous when spinning the blade down and let it bang into the stop, the rack/pinion seems to get wedged out of it’s “running” alignment. Basically the rack and pinion is slightly out of full mesh with each other.

I correct this (and promise myself not to do it again) by very gently tapping on the mechanism while wiggling the crank with emphasis on the CW direction.

View Peteybadboy's profile

Peteybadboy

3384 posts in 3034 days


#5 posted 03-30-2021 07:30 PM

Did you accidently lock it?

-- Petey

View Sark's profile

Sark

407 posts in 1444 days


#6 posted 03-30-2021 08:14 PM

Thanks for the ideas. Agree that the lead screw is probably jammed up with sawdust. It’s not locked. I’m trying to avoid taking the top off because there is a lot attached to it…router table, fold-up out-feed table, and Unifence rails. So I’ll try going in from the side by the motor and see if I can loosen it.

View Ynae's profile

Ynae

8 posts in 38 days


#7 posted 04-10-2021 06:29 AM

Hi

I got the same saw and having the same issues. I can turn the wheel but its hard. Would like to hear any suggestions.

Curtis


I lowered the blade to below surface, and now I can’t raise it. Is totally jammed. Can’t turn the crank in either direction. (And not I’m not sure what direction raises it, clockwise or counterclockwise?) Don’t think I’ve ever had this problem before. This is a Unisaw 34-802.

Thanks for your help, which I surely need!

- Sark


-- Curtis, Maili Point, Hawaii

View Sark's profile

Sark

407 posts in 1444 days


#8 posted 04-10-2021 02:55 PM

OK, here’s how I got the saw unstuck. First, thanks to the those who said ‘clockwise’ because that is the direction to turn the wheel to raise the blade, at least on an older Unisaw.

I took off the shop-made motor cover. Inserted piece of scrap wood between the motor and the cabinet. And then with my wife prying the stick back and forth, I turned the wheel with considerable force, both hands, and it loosened up. Hooray.

False start: my first try was to use my car jack to try and raise the motor. Wrong idea. The motor rotates outwards from the front of the cabinet, so vertical force is useless. The pry bar method worked, but it takes two people. I couldn’t jiggle the motor with a stick and turn the wheel with enough force using one hand. Hope this helps.

Final comment: the gears/worm drive had been completely cleaned out not that long ago when I was unable to get the blade to a perfect vertical position, and because of general stiffness raising, lowering and tilting the blade. Once I was able to get the motor unstuck, it moves as freely as can possibly be.

View woodbutcherbynight's profile (online now)

woodbutcherbynight

9216 posts in 3493 days


#9 posted 04-10-2021 03:16 PM

Very possible you got a piece of splinter jammed in gears

-- Live to tell the stories, they sound better that way.

View Ynae's profile

Ynae

8 posts in 38 days


#10 posted 04-11-2021 07:10 AM

I adjusted the nut and locking collar at the end of the elevation worm gear shaft. If helped a little. But still a little hard to raise.


OK, here’s how I got the saw unstuck. First, thanks to the those who said ‘clockwise’ because that is the direction to turn the wheel to raise the blade, at least on an older Unisaw.

I took off the shop-made motor cover. Inserted piece of scrap wood between the motor and the cabinet. And then with my wife prying the stick back and forth, I turned the wheel with considerable force, both hands, and it loosened up. Hooray.

False start: my first try was to use my car jack to try and raise the motor. Wrong idea. The motor rotates outwards from the front of the cabinet, so vertical force is useless. The pry bar method worked, but it takes two people. I couldn’t jiggle the motor with a stick and turn the wheel with enough force using one hand. Hope this helps.

Final comment: the gears/worm drive had been completely cleaned out not that long ago when I was unable to get the blade to a perfect vertical position, and because of general stiffness raising, lowering and tilting the blade. Once I was able to get the motor unstuck, it moves as freely as can possibly be.

- Sark


-- Curtis, Maili Point, Hawaii

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