Restoring 10EE 1954 vintage - Page 17
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  1. #321
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    Quote Originally Posted by MachinistBlue View Post
    I think I need to clarify a bit. The lever assembly I am referring to is actually two mechanisms (which are switches). The switch with the lever sets whether the feed rod or the thread rod spins. Coaxial to that mechanism is a round knob actuated range shift mechanism. The shaft that is part of the range shift mechanism is the one I think there is no seal for. I include the section drawing that I have that shows the threaded collar I am having trouble with. That collar is circled in red. Next to that collar is a gap where the waxy string came out of. Next to that gap is bushing. There does not seem to be any space where an oil seal could go.
    Ahh, the other right . Here's a shot of the assembled shaft coming out of the gearbox on my '56:

    lever1.jpg

    and here's the lever back:

    lever2.jpg

    There's only a square key between the 2. The knob is held on only by a taper pin. Here's a shot with the collar removed:

    lever3.jpg

    In mine it's graphited yarn, aka packing. I suspect that what's happening is that something's in the threads, maybe some old packing. Bend a bit of wire and be sure that you can run it through the threads making sure that they're clean.

    Looking at 201073 I expect that going from the outside in there's this threaded collar, the packing, then finally a bushing. Make sure that the threads are clear out from the bushing, slip it over the inner shaft and repack until the collar is tightish against the packing but the smaller shaft still moves easily enough. Don't try all this without the inner shaft in place

    I probably have some of the packing around, I use it in steam engine valves and such. Let me know if you need some, likely that won't use more than a foot or so.

    Here's a section of the gearbox print showing all this:

    lever4.jpg

    It seems to show the threaded collar (SK-1783), something, then a bushing (K-140). I think the something is the packing.

    (Sorry if this is somewhat incoherent, it's been edited 4 times after multiple shop trips)

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  3. #322
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    Thank you very much for sharing your experience with the shaft in question. It all looks very similar to what I am looking at. And thank you for the offer of the string. I might take you up on it but if I recall the string I pulled out looked to be in decent shape. The section drawing does not seem to imply anything goes in there...but the string idea seems like at least something. I gave some thought to sticking some o-rings in there.....not sure if that would be any better.

    BTW..different topic...does anyone recall if there is a gasket between the apron and the saddle? I was hoping to hang the apron this weekend but just recalled that maybe I am missing a gasket.

    -Walt

  4. #323
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    Quote Originally Posted by MachinistBlue View Post
    Thank you very much for sharing your experience with the shaft in question. It all looks very similar to what I am looking at. And thank you for the offer of the string. I might take you up on it but if I recall the string I pulled out looked to be in decent shape. The section drawing does not seem to imply anything goes in there...but the string idea seems like at least something. I gave some thought to sticking some o-rings in there.....not sure if that would be any better.
    There's a seal for the outer shaft, so there's going to be something seal the inner as well, and the packing is the only thing in there to do it. If you look at the threaded bit it's got something of a inner cone shape to press the packing in against the shaft. You might make something to work with o-rings if you can find o-rings with the right cross section (you'd want something that would give a little squish - something like .007 with a round section should be good) but really, packing is almost ideal for a rotating member like this.

    BTW..different topic...does anyone recall if there is a gasket between the apron and the saddle? I was hoping to hang the apron this weekend but just recalled that maybe I am missing a gasket.
    No gasket. Harry Bloom had to shim his to get the apron at the right height with the saddle mounted. You can check the height from the bottom of the saddle to the top of the lead screw, it's a nice value in imperial units (something like 3 1/2", but that's an old and untrusted memory) or feed rod (6.375"? again memory). If that's the same at the left side down to the leadscrew exiting the gearbox and on the right side down to the leadscrew where it enters the rear bearing mount you're in good shape for all of the half nut engagement, the feed rod and the ELSR control if you have one, and the apron pinion will mesh with the rack to drive the saddle right If you mess with the interface between them the power cross feed gearing will change mesh.


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