View Full Version : Mark V 500 worktable rear trunnion frozen
Well, I got my '58 headstock all ship shape, and I was working on cleaning up the 500 series worktable, when I discovered that the rear trunnion was nearly frozen. I took the table off the trunnions and was able to move it a little after WD40 and levering it with a long pry bar.
I took a look at the exploded view on the SS parts page, but it didn't clue me in as to how the trunnion attaches to the mounting block. I don't really see a bearing, or any adjustments.
Anyone know how the rear trunnion attaches to the mounting block on a series 500 worktable? I'd like to just pop it off and clean/polish it back into functionality. (Can't afford a 510 upgrade right now.) Also, any other ideas on how to get that trunnion pivoting properly would be most appreciated. :)
Thanks!
-Chris
JPG40504
03-15-2010, 09:55 PM
The 'mounting' block has a bearing through which a post rotates. WD40 is not an effective penetrating oil. I like kerosene! Others swear by 'Kroil'. let it soak overnight, and try rotating the 'mounting block' Observe that it is flat on one side and slightly rounded on the other. Do not mount it upside down when reattaching to the table top. It will break!!!
Item 142 rotates on a post on item 151.http://www.shopsmith.com/ownersite/partscat/worktableexpview_500.htm
The 'mounting block' referred to in the link above is for the saw blade guard.
charlese
03-15-2010, 09:58 PM
Hi Chris! Welcome to the Forum!
Although I know just about nothing about the 500 table, I found one reference to an up grade to the 500 table tie bar. Hope it helps. http://www.shopsmith.com/ownersite/productmanuals/MKV500_SuppInfo.pdf
Assuming the 500 trunnions are similar to the 510 here's an old post that discusses aligning the trunnions. Nick;s explanations are pretty cool.
http://www.shopsmith.net/forums/showthread.htm?t=131&highlight=dollar+bill
JPG40504
03-15-2010, 10:08 PM
Hi Chris! Welcome to the Forum!
Although I know just about nothing about the 500 table, I found one reference to an up grade to the 500 table tie bar. Hope it helps. http://www.shopsmith.com/ownersite/productmanuals/MKV500_SuppInfo.pdf
Assuming the 500 trunnions are similar to the 510 here's an old post that discusses aligning the trunnions. Nick;s explanations are pretty cool.
http://www.shopsmith.net/forums/showthread.htm?t=131&highlight=dollar+bill
CML: These links will probably add to your confusion. The first does contain a good drawing of the tiebar which you do have, but all those other parts may not be what you have.
The thread link pertains to the newer version on the table(505,510,520).
You meant well Chuck! (good intentions)
vzandt
03-15-2010, 10:20 PM
My 500 also has a locking pin that must be pulled out to allow the table to tilt. I assume this is universal, but I had not seen anyone mention it. If I don't pull the pin outward, the trunion is locked horizontal. The pin can be very stubborn in my limited experience.
JPG40504
03-15-2010, 11:56 PM
My 500 also has a locking pin that must be pulled out to allow the table to tilt. I assume this is universal, but I had not seen anyone mention it. If I don't pull the pin outward, the trunion is locked horizontal. The pin can be very stubborn in my limited experience.
That pin be on the 'front' trunion.
thainglo
03-16-2010, 11:32 AM
Chris - glad you brought this up, I'm having the EXACT same issue on a 1954 greenie that just got blasted, repainted and reassembled (bought it back in June 2009, been working off and on since then). I've been meaning to pose the question out here, and it's completely slipped my mind until I saw your note.
Perhaps the kerosene/kroil soak will work?
Thanks, everyone, for the tips. I left the thing to soak in some kerosene all day, and smacked it with a mallet a few times and got it to loosen up a little. It looks like it's a bronze bushing, and it's meant to be fairly stiff. I put the table back on, and now I'm able to tilt the table without unreasonable force, but it's not loose by any means. I'll call it good, since it's completely functional, albiet tight.
Matt: I was surprised by how difficult the trunnion was to move without the table bolted to it. Try mounting your table after spraying some penetrating oil on there, then see how tough it is to move.