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Implement Alley Discussion Forum

over-running clutch drive pins

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55 50

06-23-2006 21:23:19




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On my NH Hayliner 68 baler one of the drive pins on the over-running clutch for the pickup drive is stuck in the non-driving position. Been spraying a penetrating oil into the oil hole and tapping occassionally on the casting with a punch and hammer for a few days. The pin hasn't moved!! Any tips on how to get it freed up?

In thinking about this clutch, I wondered why it is needed. I suppose it's because the pickup can't be turned backward (or can it?) in the case where the flywheel would need to be turned backward by hand to clear a plugged situation.

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Sid

06-24-2006 20:13:49




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 Re: over-running clutch drive pins in reply to 55 50, 06-23-2006 21:23:19  
I have owned a NH 68 and a 269. As I remember neither one of them had a overiding clutch. They both had slip clutches on the Pick up drive. And If I remember right the pick up would turn backward when the fly wheel was turned backward.



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mn.Chuck

06-24-2006 06:12:04




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 Re: over-running clutch drive pins in reply to 55 50, 06-23-2006 21:23:19  
In many of the situations,we used to drill a tiny
hole from the back side. Use a small punch to tap
out,then clean rust etc. This should work for some more years. Chuck



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55 50

06-24-2006 07:08:36




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 Re: over-running clutch drive pins in reply to mn.Chuck, 06-24-2006 06:12:04  
Good idea. I'll give it a try. Where in MN are you? I'm in Waseca County.



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BarnYard4020

06-24-2006 04:22:43




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 Re: over-running clutch drive pins in reply to 55 50, 06-23-2006 21:23:19  
I just had both pins wear out on my NH 268 baler. I do not know if you are talking about the same pins though, if you are they have small springs behind the pins. You might have a weak or broken spring.The ones I am talking about are just ahead of the cluth unit and flywheel on the PTO shaft. I think the pins and springs were about $5 at the dealer and you only have to remove 2 cap screws to get at them(9/16 wrench). It is only a 10 minute job.Good luck! Richard

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55 50

06-24-2006 07:06:34




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 Re: over-running clutch drive pins in reply to BarnYard4020, 06-24-2006 04:22:43  
Those aren"t the pins I"m referring to. I"m referring to the drive pins on the over-running clutch for the pickup. It"s on the shaft that goes into the gearbox which drives the feeder fingers chain. As I mentioned before, I don"t understand the need for an over-running clutch there. If anyone knows why it"s needed, I"d like to know. Thanks



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KEH

06-24-2006 14:41:32




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 Re: over-running clutch drive pins in reply to 55 50, 06-24-2006 07:06:34  
When the 68 balers were built, there were a lot of tractors in use without live or independent pto. The overrunning clutch would keep the baler momentum from making the non live pto tractor keep going when the clutch was pushed in. I tried pulling a 67 NH briefly with a Case S for curouisty and the overunning clutch worked that way.

KEH



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55 50

06-24-2006 19:45:07




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 Re: over-running clutch drive pins in reply to KEH, 06-24-2006 14:41:32  
I fully understand that, but that"s not the clutch I"m talking about. You"re referring to the clutch on the main PTO input line. I"m asking about the OTHER over-running clutch which is on the pickup drive.



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paul

06-24-2006 21:46:37




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 Re: over-running clutch drive pins in reply to 55 50, 06-24-2006 19:45:07  
Just for the record, I understand you are talking about the pickup only - didn't know there was an over-running clutch there too. I'm only familiar with the pto one on my 270. I'll have to look at the parts diagram sometime. Not sure why it would be needed, as it has to have a regular slip clutch somewhere too?

--->Paul



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55 50

06-25-2006 09:46:23




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 Re: over-running clutch drive pins in reply to paul, 06-24-2006 21:46:37  
Paul,

The Service Parts Catalog calls the part a "clutch hub and sleeve assembly" and its two spring loaded pins drive a part called a "clutch plate" which is part of the slip clutch for the pickup. The "clutch hub and sleeve assembly" looks and works like an over-running clutch, but maybe it"s not known by that name.

The above clutch plate looks similar to, but smaller than, the over-running clutch plate at the PTO input. Ron

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