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Implement Alley Discussion Forum

Question for New Holland Steve (mechan

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Rexalot

06-12-2005 11:57:19




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I have a NH469 that I replaced the squish roller drive gear set and chain due to wear. (Chain would jump off and cause the reel drive belt to throw off too) I was wondering about the chain installation. I had trouble getting the master link to join the chain halves together so I added 1 link (chain I removed had 2 additional links so I used one of those). The chain is tight over the sprockets, but I have about 3/4 inch freeplay, more than what I would think to be right. A test run of the machine at cutting rpm (based on my Ollie"s 1800"s 520 tach setting) everything stayed together.

My first thought was I shouldn"t have needed to add a link. I didn"t try putting the chain together first placing it over the sprockets and then installing everything at one time (stretching the chain...) I have an operators manual and a parts catalog, no service manual. What would be the correct installation for this chain?

Thanks.

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Steve from New Holland

06-13-2005 04:24:23




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 Re: Question for New Holland Steve (mechan in reply to Rexalot, 06-12-2005 11:57:19  
That chain has been the source of confusion for many a New Holland haybine owner. There is nothing you did wrong. All you need to do is tighten the chain. Now I'm sure you think I'm nuts because there is no idler sprocket to tighten, but I assure you that the chain can be tightened. If you look directly inside the frame where the big sprocket is, you will see a plate that is fastened to the inside of the shaft that the big sprocket is on and that plate has a slot in it with one 3/8 bolt in it. Loosen or remove the bolt in the slot and rotate the plate with in turn will turn the shaft that the big sprocket is on and that will tighten or loosen or chain. Therefore, you can either take out the extra link or possibly leave it in. It is hard to explain, but the shaft is accentric. Trust me, it works providing the shaft is still free to rotate and has not frozen fast. If so, you have a mess on your hands. Good luck, Steve

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Rexalot

06-13-2005 05:32:22




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 Re: Question for New Holland Steve (mechan in reply to Steve from New Holland, 06-13-2005 04:24:23  
I must be lucky, the shaft is not frozen and I know what bracket your talking about. I actually had it loose and the shaft removed so I could get the gear off (it wouldn't clear the tin without pushing the shaft inwards some) When I reinstalled everything I just put the bracket back in position where I found it. I did notice that the shaft was accentric, but I had no idea I could change the chain tension using bracket position. Never made the connection between the two. I'll experiment some later today.

Thanks Steve!

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