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flattop900
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Post subject: NCR clutch Posted: Thu Feb 27, 2020 5:06 pm |
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Joined: Tue Mar 18, 2014 10:03 am Posts: 377
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Picture of NCR clutch with possible extra bushing.
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NCR bushings.png [ 12.22 MiB | Viewed 23576 times ]
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ducttf1
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Post subject: Re: NCR clutch Posted: Thu Feb 27, 2020 10:05 pm |
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Joined: Sun Aug 08, 2010 8:03 pm Posts: 1227 Images: 0
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Hi Flattop, could you turn the primary gear over to the other side? I haven't been in my shop, but I will be tomorrow. I do remember two 'spacers' in the primary. I'm sorry I'm not sure but will check tomorrow. Lou
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flattop900
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Post subject: Re: NCR clutch Posted: Fri Feb 28, 2020 9:52 am |
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Joined: Tue Mar 18, 2014 10:03 am Posts: 377
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Good Morning... Hope this helps. Regards... Flattop
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DSCN6673 (2).JPG [ 2.96 MiB | Viewed 23554 times ]
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ducttf1
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Post subject: Re: NCR clutch Posted: Fri Feb 28, 2020 9:54 pm |
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Joined: Sun Aug 08, 2010 8:03 pm Posts: 1227 Images: 0
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flattop900
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Post subject: Re: NCR clutch Posted: Sat Feb 29, 2020 7:50 pm |
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Joined: Tue Mar 18, 2014 10:03 am Posts: 377
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Hi Lou... The longer of the two spacers fits the lip seal in the basket. So it probably does the same job as the O-ring on yours. The thing missing on both is the sealing of the spacer ID like the internal O-ring used on F1 dry clutch. Is there some strategic use of sealer in play when assembling the clutch? Lights coming on slowly....almost there Flattop
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ducttf1
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Post subject: Re: NCR clutch Posted: Sat Feb 29, 2020 8:28 pm |
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Joined: Sun Aug 08, 2010 8:03 pm Posts: 1227 Images: 0
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Hi Flattop, the fit is really tight and I've not seen a seal of any kind. It is 'loaded' so the precise fit is probably how it works. If you have a sloppy fit I would make a new bush. I will take a look at the clutch basket tomorrow, I don't remember a seal like yours has. Lou
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618F1
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Post subject: Re: NCR clutch Posted: Sun Mar 01, 2020 3:19 pm |
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Joined: Thu Oct 14, 2010 11:23 am Posts: 1861
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Apparently things were changed now and then. Here is a photo of steel hubs with and without the large O ring. And with the small O ring outside the tall bush. The small flat washer is a stock part, I believe, that fits below that aluminum center hub to keep it from grounding on rotating steel parts below that. Attachment:
IMG_1874.JPG [ 4.2 MiB | Viewed 23468 times ]
Got these in a mish-mash box of assorted engine parts sold on ebay last year. Unfortunately, it did not come with the NCR side cover. And a stock dry-clutch cover does not work --- easily. MikeV
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ducttf1
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Post subject: Re: NCR clutch Posted: Sun Mar 01, 2020 7:17 pm |
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Joined: Sun Aug 08, 2010 8:03 pm Posts: 1227 Images: 0
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Hi Mike, you are correct, everything changes all the time! I have never seen a basket with a spring seal. All the clutches I've seen have the bushing. You can see the difference in the ID. Lou
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IMG_1295.JPG [ 119.18 KiB | Viewed 23456 times ]
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IMG_1294.JPG [ 125.79 KiB | Viewed 23456 times ]
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flattop900
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Post subject: Re: NCR clutch Posted: Tue Mar 03, 2020 3:00 pm |
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Joined: Tue Mar 18, 2014 10:03 am Posts: 377
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Gentlemen... It's good to know that there are two versions of this clutch. I was getting worried I had a non OEM modified version. So we know that the O.D. of the spacer is sealed with an O-ring or lip seal, but what keeps the oil from migrating between the main shaft and I.D. of the spacer? Does the F1 spacer not have an internal O-ring to perform that task? Flattop
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F1 clutch seal and spacer.jpg [ 198.2 KiB | Viewed 23389 times ]
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