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Combines & Harvesters Discussion Forum

straw walker blocks

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DNW in Mi

07-15-2014 19:32:29

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I would like to kmow what other have done when the crank is worn and new blocks won't tight up cranks. It's a white 7300 combine.

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07-18-2014 16:14:47

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 Re: straw walker blocks in reply to DNW in Mi, 07-15-2014 19:32:29  
I have found this thread INTERESTING, because, in my experience, the "throws" on the walker cranks wear terribly "out of round", and, even if you modify the wood blocks to have smaller holes, just the "high sides" of the "egg-shaped" crank throw will contact the blocks, leaving a lot of "play" 90 from there and allowing the walker bearings/shaft to hammer, knock, and ultimately crack and break the walkers.

Years back, I had that happen twice, once with a high-houred 503 IH and then with a used and abused 7700 DEERE. Wound up replacing the cranks, and a couple of walkers in both.

IMHO, this might work if this is a machine used for "play" but if you are going to use it and work it and put some hours on it, new, or good used cranks are the only "fix".

Good luck!

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j hikemper

07-17-2014 06:58:01

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 Re: straw walker blocks in reply to DNW in Mi, 07-15-2014 19:32:29  
bought a set from agco for my 750 massey that they had on the shelf ,, pricey ,, son Michael looked them over and made me an entire set out of seasoned white oak, he loves tinkering in wood... after 2 seasons ,they are holding up fine ,, but .. they should be hard maple

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07-16-2014 12:47:08

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 Re: straw walker blocks in reply to DNW in Mi, 07-15-2014 19:32:29  
Like charles said. Outside of a new walker crank, you will have to modify the blocks to fit the wear on the shaft.

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Charles Krammin

07-16-2014 04:13:11

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 Re: straw walker blocks in reply to DNW in Mi, 07-15-2014 19:32:29  
Are they maple blocks? On a JD 45 they had spacers to take out to adjust. try Miking the shaft and then cutting that amount off the face of one half. Not perfectly round that way. To get perfectly round would have to shave more off face and rebore to worn crank throw size.

Charles Krammin SW MI

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DNW in Mi

07-16-2014 16:22:39

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 Re: straw walker blocks in reply to Charles Krammin, 07-16-2014 04:13:11  
So just cutting half of the blocks will work? Thought about cutting both blocks but seemed you would have an egg shape hole. Yes malpe blocks

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07-18-2014 15:27:59

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 Re: straw walker blocks in reply to DNW in Mi, 07-16-2014 16:22:39  
You may want to shave both halves and re bore the blocks to the worn diameter of the crank.

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