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NH 489 wobble drive arm shaft needle bearings

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01-02-2021 13:35:29

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I have to replace these bearings in 2 machines and wonder if anyone has tried putting 3 bearings in that bottom piece. I know it takes two but don't remember if it was machined all the way on the bottom of the yoke. If any of you out there want to keep your wobbledrive box in good shape make sure that you keep any side slop out of it. If you don't the counterweight will start hitting that big bolt just opposite it. They had to put it in backward, if it was the other way the round head of the bolt would give some more room. I washered mine a lot but it still moves around some. Later I will remove the bars and weld them up so the bushing is tight.

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Handsome Devil

01-06-2021 07:10:29

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 Re: NH 489 wobble drive arm shaft needle bearings in reply to riveroadrat, 01-02-2021 13:35:29  
I sure appreciate it maybe you'll figure out my 48 for me when I get to it in the spring. Regards, John.

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01-04-2021 11:48:35

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 Re: NH 489 wobble drive arm shaft needle bearings in reply to riveroadrat, 01-02-2021 13:35:29  

I took this pic from a video i took this past summer, i welded the blue piece of steel to the mower frame between the link, took out a good amount of slop, it still has some side to side movement but not alot.

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Handsome Devil

01-04-2021 06:30:48

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 Re: NH 489 wobble drive arm shaft needle bearings in reply to riveroadrat, 01-02-2021 13:35:29  
Can you share some pictures of what your talking about. I have some work to do on mine and am suspect of where my actual trouble is coming from. Hope you can as I need to correct the problem in mine and there is slop somewhere. I broke my back a year ago and crawling around on or under machinery was very painful last summer. Hope this spring to get back at that 489 haybine which I need working.

Thanks, John.

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01-04-2021 07:17:38

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 Re: NH 489 wobble drive arm shaft needle bearings in reply to Handsome Devil, 01-04-2021 06:30:48  
I'll be working on it today and i'll take some pics. You might want to email me to remind me to post them.

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01-06-2021 05:04:15

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 Re: NH 489 wobble drive arm shaft needle bearings in reply to riveroadrat, 01-04-2021 07:17:38  
I didn't get to it yet, maybe next week.

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