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Case Tractors Discussion Forum
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DC Makes A 'Growling' Noise

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Glenn F.

10-26-2005 08:08:52




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Restoring these old tractors is quite the process. In a little test operating of my DC (which I rescued from a scrap iron dealer years ago), I notice a noise I would describe as somewhat of a growling sound coming from the bell housing area. I am thinking it may be the bearing on the input shaft. I was just in there a month or two ago and didn't notice any looseness but something isn't just right. From my very limited description, do any of you have a a suggestion as to what the problem may be? It is a '53 with live power. The sound is noticable when the tractor is idling in neutral. It becomes less noticable when operating the tractor as the gear noise, etc. becomes a factor. I suppose the ole' girl is gonna be split in half again next summer...? Oh well! Glenn F.

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Camboted

10-26-2005 08:48:03




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 Re: DC Makes A 'Growling' Noise in reply to Glenn F., 10-26-2005 08:08:52  
Glenn, It is probably your pulley bearing, but it could also be the main double bearing on the input shaft, or even the bearing opposite the pulley side. The clearance on the pinion is crucial to making them run quiet. There is a section in the manauals on how to set it, it involves using the shims on the bearing covers. The side bearings are easy to replace, so start there, but to set the pinion clearance you'll have to drain the trans oil and pull off the trans cover. We found that on our rebuilds we just replace all the bearings, but we fortunately found a source of NOS IH bearings in Cambodia for very low prices. LOL!

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Glenn F.

10-26-2005 11:07:45




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 Re: DC Makes A 'Growling' Noise in reply to Camboted, 10-26-2005 08:48:03  
Assuming it's a bad pulley bearing, I suppose I should be able to hear the noise by putting a dowel up to the bearing while the tractor is running...? If the bearing is bad, should I feel play by simply wiggling the pulley? Thanks, Glenn F.



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Camboted

10-26-2005 16:15:12




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 Re: DC Makes A 'Growling' Noise in reply to Glenn F., 10-26-2005 11:07:45  
It's worth a try although, and i'm sure you'l hear pleanty of noise. Even the new ones have some noise there, what we've found in a lot of old tractors is bearings that are still functional but the race is pitted enough to cause the noise. If the shaft is loose then you most likely have to replace both side bearings. You might try 140 weight oil to see if it quiets down.



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Glenn F.

10-26-2005 16:36:06




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 Re: DC Makes A 'Growling' Noise in reply to Camboted, 10-26-2005 16:15:12  
It's gonna be a few days before I get out in the shop to check it out but as I think of it, the noise continued when I had the foot clutch depressed and the pulley is not turning. Glenn F.



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Camboted

10-26-2005 17:11:06




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 Re: DC Makes A 'Growling' Noise in reply to Glenn F., 10-26-2005 16:36:06  
Hmmm?? Then it could well be in the the main pinion bearing #06006AB, and the continous PTO sleeve and sprocket, or in the Live PTO upper bearing, which can have a hard time being lubracated because it does not run in oil. The pinion stops when you depress the foot clutch but that sleeve and bearing continue to operate as does the PTO and hydraulic drive. Those are the only parts left moving, so unless there is a problem back in the hydraulic pump area, that's got to be where you find something wrong. Fun Huh? What you are experiencing is why I always laugh when someone throws on a coat of paint and calls the tractor "restored".

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todd hamilton

10-26-2005 18:41:03




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 Re: DC Makes A 'Growling' Noise in reply to Camboted, 10-26-2005 17:11:06  
Hey Ted - you insulted my "restored" SC. Now it may be hard to start when I want to plow snow. Besides, new tires were added to match the new paint (six years ago). Oh well, if it ever quits running or moving I will get it gone through. However, if I ever put big money into it I want the Hudson power steering option installed!:^)



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Camboted

10-26-2005 19:32:42




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 Re: DC Makes A 'Growling' Noise in reply to todd hamilton, 10-26-2005 18:41:03  
My apologies to you and, of course, to your beautiful SC :>) !!



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