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The old OHIO #2...a few pics...innards

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  • torker
    replied
    Darin, yes it has bronze bushings for the knee drive pinion etc.
    The axle that this gear is pinned to froze up from the rust. Then people started cranking on the wheel to get the knee to move and bust the gear.
    Almost have to have this gear as it "balances" the drive.
    With only the hand crank gear in place the jackscrew bevel gear wants to rock which would lead to other problems.
    Tricky little gear to reproduce without a shaper huh?

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  • wierdscience
    replied
    Hey Russ,that looks about like the crap I find,busted gear teeth,stipped splines the works,good thing we both know how to weld huh?

    Go ahead and fix it,if you put the thing back together without making the knee feed work,chances are you'll be pulling it down again later.

    What kind of bears does it have,bronze sleeves?

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  • torker
    replied
    Originally posted by TECHSHOP
    I think your lathe is beginning to feel a bit of jealousy seeing you fondle that mill for three days and nights.
    You're right...it's pretty mad at me
    Huge thunder storm yesterday. Knocked out the internet for near a day.
    Here's the nasty little gear I have to repair.
    Have the rest nearly ready for reassembly

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  • TECHSHOP
    replied
    I think your lathe is beginning to feel a bit of jealousy seeing you fondle that mill for three days and nights.

    Leave a comment:


  • torker
    replied
    There, the shafts are loose. Now comes the ugly part...going way up inside the knee. Grease up to the elbows, trying to uncouple the dog clutch for the knee and back out front to undo the dog clutch for the X feed.
    Man is this thing ugly to work on now that it's on the floor.
    Too bulky and heavy to get onto a bench. Oh well, I'll have to relearn how to stand on my head again
    Geez...the long weekend just vapourized. Was going to go 4 wheelin...Ooops!
    Russ (soon to be blacker that Toby's....)

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  • torker
    replied
    Graeme...Im doing this also...thanks gawd for digital cameras
    Waited for the missus to come home from work.
    We got the spindle out like nothing. It looks great and so do the bushings. Even the rear bushing is heavy duty. It has about 5" of bearing surface length and is in really good shape.
    Here comes the knee...

    Crap...I'm 4" short of lift.
    Look at this mess! Believe it or not there is two shafts buried in the rust. No wonder they wouldn't move.
    A bonus...the majority of the rust that was holding the knee is right in the middle towards the bottom...very little on the dovetails with the exception of the edge of the gib.

    Had to cheat to get it the rest of the way up. Shove boards in the web to take up slack, take the hook and chain off and use the shortest cleavises I could find...here is the beast...freed at last.

    Still, with all this, the only thing I can find wrong is the original chipped bevel gear for the knee powerfeed. I'm sure I'll find something ugly in the rusted gear cluster. One of the shafts is a tricky bit and this is were the trouble is originating from.
    We'll see!
    Russ

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  • GRH
    replied
    The old Ohio #2

    Torker
    I used to live on a farm and when we did not have parts or owners manual and I was taking a piece of equipment apart we photographed the heck out of it labled parts made sketches etc, because days or a couple of weeks later putting it back together can be a MUCH bigger problem.

    Regards Graeme

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  • torker
    replied
    Just a brief update for you guys who secretly want to restore a rusted treasure that you will buy from hoffman!
    I've tried everything I can think of to loosen the two gears up inside the knee with zero success.
    I think I've partly sheared off a key in the one shaft that is REALLY siezed.
    So...the whole thing is coming apart. I didn't want to do this right away but it had to be done anyway.
    Have to take the spindle out so I can lift the knee completely off and get in behind it to knock out the siezed shafts.
    The good news...I have the spindle part way out. Can see the bearing surface for the front of the spindle. It looks like it came out of the factory except for one small rust stain..not even a pit.
    The spindle rides in a nice wide bronze bushing that is very easy to replace if it ever needed it. Yippee!
    Having to use a puller to tug the spindle out.
    Had to wedge the back part of the spindle up so nothing gets chewed up on the way out.
    I've just chickened out for now.
    The bull gear, dogs and shifter slide probably weigh 50 or 60 pounds and I have no way to hold them when the spindle pulls all the way out.
    Have to round up some help for this...damm...I hate having help but...
    The arbors I have seem to fit pretty snug...that's good!
    Also...finally cleaned off the spindle speed tag.
    Thing goes from 16 rpm to 384 rpm. Has 16 total spindle speeds.
    Haven't cleaned off the feed speed tags yet but it has a whack of feed speeds also.
    Russ (still covered in Kroil)

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  • Guest's Avatar
    Guest replied
    I saw a old tractor transmission once that water had gotten into it then frozen thawed and froze again,and again for quite a few years.
    Well we split the tranny pulled the axels and what we found was a shame,Ice is very destructive out of 12 normal gears 3 were ok the rest were crushed,broke, and Pulverised,Thats what I call a 7 or8" gear in at least 16 pieces even bent a shift fork.It was unbelievable the old guy that I was helping explained what happened,Oh and the case was not cracked at all.

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  • torker
    replied
    AK...Yes it is entirely possible. The actual bevel gear that turns the large bevel gear attached to the jackscrew only turns a half turn or so.
    There is a cluster of small gears up in there and I think two may be siezed.
    The water that ran down the back of the knee and dovetails probably got into the rear of the shafts as they exit out the back of the knee.
    I could easily take that gear out of commission and just use the hand crank for the knee but the cool factor would be way down then.
    I'd like to keep the power function as I hear a lot of people wish they had a power knee.
    Russ

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  • A.K. Boomer
    replied
    Russ could it be posible that the jackscrew is still engaged into the auto feed mech., or froze in that mode? One thing for sure, you got yerself a career!

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  • torker
    started a topic The old OHIO #2...a few pics...innards

    The old OHIO #2...a few pics...innards

    Still monkeying with the jackscrew...trying to get it to turn more than half a turn.
    "Turns" out that this whole gear train is all tied together at one point and that shaft is siezed or something is broken.
    Here's a pic of the outer parts of the gear train. This shamozzle powers both tables and the knee...

    This is the geartrain on top of the X table that powers the feedscrew for the Y table movement...very ingenious actually...

    THIS is the bloody thing I've been fighting with for two days...
    Look up...waaay up. In this little pocket right up at the back top corner is the two bevel gears that drive the knee jackscrew, either power or by hand.
    The bevel gear right behind the top of the jackscrew is the culprit.
    There is a little dog clutch right behind it. Something is siezed up or broken way up in there. It turns easily for about 1/2 a turn then stops dead.
    Very tough place to get at.

    Russ
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