Does ANYONE have any info they can share with me on re-installing the reverse-gear assembly? The two gears on the main shaft need to be pressed on. But when you do, it leaves no room to screw on that little locking-block.
So what I did was inserted the reverse-gear casting into the headstock, screwed on the locking block, then I tried to use the main-nut as a means to press on those gears. I engaged the back-gear on the headstock so all the gears would lock and not move. Then I began to tighten the nut. It was working ok, moving the first gear down until the section of the shaft where the nut is twisted right off.
So now I need a new shaft... (sigh)
Can someone tell me how this is done – as I’m dead in the water…
I have dismantled and re-installed a dozen of these shifters your working on and always the little lock plate with the two flat head screws is removed before you take the shifter off and put back on after its installed. Its a little tricky but that is how its done. As to a shaft the first gear is a press fit on the shaft and needs to be done in a arbor press. The second gear is your stud gear and it should be a slip fit. You will also notice that the key is stepped and only goes on one way.
Contact me at dennis.turk2@frontier.com as I have several shifters on the shelf for these early lathes. I will need what year and model yours came from.
You mite also check with Ted Phfugner as he may have a new one on the shelf also.
This shaft can be repaired by turning a threaded spud and installing it in the shaft. You can do it several ways and one way is to find a bolt with the correct thread. Then turn a diameter down so it can be press fit into a bored hole in the end of the shaft. Then using a cross pin to secure it in place. Another way is to make up a new threaded spud with a smaller thread on one end. Then drill and tap the end of your shaft and screw in the new threaded spud and secure it with locktight. There is always a way to fix most things. In my family there has always been a saying. If we cant fix it, it was not broken in the first place.
I have dismantled and re-installed a dozen of these shifters your working on and always the little lock plate with the two flat head screws is removed before you take the shifter off and put back on after its installed. Its a little tricky but that is how its done.
Dennis - many thanks for responding. You mentioned that this is tricky to do, so how actually do you do it?
You have to have the stud gear off the shaft when you install the shifter. If you have a large gear on the stud position you cant reach the screw heads. Even with the stud gear off you still have to be persistent in getting the screws in and I have never really gotten them as snug as I would like as the screw driver is at an angle. This would be a good place to use socket head flat head screws so you could use a ball driver so you can work at and angle. As all my lathes are restored for display only I am very fussy about originality so I have not done this but in your case it would make sense to do so.
As to a shaft the first gear is a press fit on the shaft and needs to be done in a arbor press. The second gear is your stud gear and it should be a slip fit. You will also notice that the key is stepped and only goes on one way.
Dennis - the "first" gear you mentioned, not sure if you're starting from the bottom or top, so is (the stud gear) the larger or smaller of the two?
If you have a large gear on the stud position you cant reach the screw heads. Even with the stud gear off you still have to be persistent in getting the screws in and I have never really gotten them as snug as I would like as the screw driver is at an angle.
Hmm... When I had the large gear off, I could easily get to the locking block because the large gear (stud gear?) is what blocks it on mine.
By the way, I sent you some pics of the lathe and details to help locate the proper shaft. Many thanks!!!!
The first gear is the one that is pressed on and stays on. This is the gear that runs with the two tumbler gears. The outer gear is the stud gear and may use a number of different gears depending on what lathe you have. If its a quick change lathe then it will only have one gear used at that position. If its a standard change or change gear lathe it can have quite a number of different gears used at this position. If its a standard change tool room lathe or a Jr. version it usually has a 16 tooth for slow feed and then any gear you see in the gear chart that allows you to cut a particular thread.
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Re-Installing Reverse Gear Assembly - HOW?
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Originally Posted by Dennis Turk
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