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How to remove reset knob from clock mech?
#262453 Mon Jul 11 2011 10:47 AM
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So, I have been tearing down a Pennsylvania SE2 clockface and have it all apart but can't for the life of me figure out how to get the machined reset knob off. It seems to have some sort of gearing inside so when you turn it clockwise it just clicks and doesn't move the mechanism and when you turn it right it resets it. But, I can't get it to unthread, assuming it is threaded by turning in either direction, and there doesn't seem to be a pin or anything like that holding it on. Ideas?

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Re: How to remove reset knob from clock mech?
chrisbowers #262482 Mon Jul 11 2011 01:01 PM
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Seems to me the reset on that pump is a two piece, the outer casing is threaded on. I think anyway?


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Re: How to remove reset knob from clock mech?
Pogo's Garage #262617 Tue Jul 12 2011 07:09 AM
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There's a hex shaped piece at the back of the casting, but it looks like it's all one piece. Perhaps it's two pieces but it doesn't look that way?

Re: How to remove reset knob from clock mech?
chrisbowers #262627 Tue Jul 12 2011 08:58 AM
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Hi Chris, don't know if I can answer your question but I can offer another set of eyes? We have a small machine shop at home, just outside Baltimore, I'd be glad to look at it and see If I could help?

Let me know,
Keith

Re: How to remove reset knob from clock mech?
gmstuff #262658 Tue Jul 12 2011 02:59 PM
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Thanks Keith, I may have to take you up on that if further tinkering doesn't yield any insights!

Re: How to remove reset knob from clock mech?
chrisbowers #262701 Tue Jul 12 2011 07:20 PM
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Is that a Pennometer pump?


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Re: How to remove reset knob from clock mech?
jkyocom #262706 Tue Jul 12 2011 08:08 PM
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This is off a pennometer clock, it has a ratchet inside to only turn the centershaft of the clock in one direction to reset. I could not get the brass end off, so I assume it is knurled and pressed in. It might be threaded. I had to use a tubing cutter for copper pipe and cut the oustside of the knob to open the ratchet area. I was able to get it off then. I had a new (solid) one made at the machine shop.
It will have to be a LEFT hand thread and kept stationary with threadlock
good luck.
Joe


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Re: How to remove reset knob from clock mech?
jkyocom #262723 Tue Jul 12 2011 10:36 PM
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That's the same one on my pump, and it is threaded, a littlebfirm pressure and it spun off.


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Re: How to remove reset knob from clock mech?
Pogo's Garage #262736 Wed Jul 13 2011 06:33 AM
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So Lance, do I turn it in the direction of the reset after it is reset back to zero to spin off?

And Joe, that is the same knob I have. It's not a Pennometer pump, but made by the same folks so I'm assuming they used the same knob.

Re: How to remove reset knob from clock mech?
chrisbowers #262759 Wed Jul 13 2011 12:40 PM
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I think what pogo was meaning is that the brass plug in the end is threaded.


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Re: How to remove reset knob from clock mech?
jkyocom #262798 Wed Jul 13 2011 06:07 PM
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So would I still have to cut the aluminum piece off?

Re: How to remove reset knob from clock mech?
chrisbowers #262816 Wed Jul 13 2011 07:16 PM
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Unscrew the aluminum part from the brass part of the knob.
Once the aluminum part is off, you can unscrew the ratchet
(left hand thread ? ) then you will be able to take the brass part off.



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Re: How to remove reset knob from clock mech?
jkyocom #262869 Thu Jul 14 2011 09:58 AM
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Got it, I'll give that a whirl. I'm assuming the aluminum part is standard threads.

Re: How to remove reset knob from clock mech?
chrisbowers #262964 Fri Jul 15 2011 06:07 AM
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It may be left hand
if you reset the clock to the left, if they were not L-H
it would come off?


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