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UnderSerrated or Over

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ChrisL

06-16-2003 19:50:26




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I know the difference between under, over, heavy and smooth sickle sections.....

However my sickle seems to have some of all.....

I have a Ford 501 - it looks like the bar has been added to since it is a 9' one - don't know if that would be a factory job or not.....

the stock sections appear mostly to be underserrated - it appears that about half the guards have serrated ledger plates and half of them are smooth.....

ANYWAY, i cut mainly ditch grass for now - someday hope to do some alfalfa or something, but now it is just grass or weed spots.... which type should I be using? does it depend on what I want to cut? most high capacity and new machines seem to use overserrated and I put a couple of those on - but I am ready to replace quite a few now that my hay season is over ..... ..... .isn't that always the way it goes.....

it cuts good now - but only if i go quite slow - so mowing is slow going to say the least....

if the grass is perfectly straight and no short or fine ones or not tangled and down is does go a little better - but definitely time for some new sections.....

is there an easier way to get a good looking rivet job other than just pounding them down?

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thurlow

06-17-2003 06:32:13




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 Re: UnderSerrated or Over in reply to ChrisL, 06-16-2003 19:50:26  
RE: setting rivets; device called "Johnson" sickle servicer; rivets look like they were set in the factory; also knocks old knife sections off and punches out old rivets. You should be able to come up with a used one pretty cheaply, since most farmers have gone to bolt-in sections.....



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howster mighty

06-17-2003 04:13:57




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 Re: UnderSerrated or Over in reply to ChrisL, 06-16-2003 19:50:26  
chris, what you need is a rivet set. Sections are always coming loose if you don't use one. Like rls said it is like a punch with a little indent to fit over the end of the new rivet. I realy like the over serreated sections because they are self sharpening. Seems like guys that cut a lot of grass hay prefer the under or smooth. Then you have sickles to sharpen in the morning while the dew is on. I'd just knock them all off and start over, or else just buy a new a sickle assembly. Then repace any ledger plates that don't have a good square sharp edge. Also attention to the hold down clips.

Oh, by the way, if you use to learn the rivet set you will NEVER want them damn bolts that many guys use.

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Sid

06-16-2003 21:50:12




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 Re: UnderSerrated or Over in reply to ChrisL, 06-16-2003 19:50:26  
I prefer the top serrated they do a better job for me, on my Allis mower and Hesston mowerconditioner. I also use section bolts the lock nut takes a seven sixreenth wrench and you can replace broken section in the mower. I have never seen a smooth ledger plate so my guess is that have of them are worn out. they may make a smooth ledger plate I just have not seen them. I think I would prefer a serreated ledger over a smooth.

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paul

06-17-2003 01:05:18




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 Re: Re: UnderSerrated or Over in reply to Sid , 06-16-2003 21:50:12  
I have a box of smooth ledger plates in the shop, but honestly don't know what they fit, never checked.

I would prefer serated ledger plates and under- or smooth sickle sections. Works best in my Minnesota climate on troublesome small dampish grasses. Also you can sharpen eith of those sickles.

With top-serated sickle, I'd look to smooth ledger plates.

Alfalfa will cut easy compared to the ditch hay. Thin fine grass & floppy damp (never would dry out) clover is the worst stuff I ever cut; Alfalfa has always been a breeze.

The hammer works fine on the rivots, they make a $50 tool that makes them look neat. But I'd sooner get the special bolts and forget the rivots.

--->Paul

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RLS ia

06-16-2003 20:10:40




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 Re: UnderSerrated or Over in reply to ChrisL, 06-16-2003 19:50:26  
One other thing to check is the clearance between the ledger plates and the knife, there should be shims under the hold downs and the bar that adjust this. On my old #5 JD mower I had to take some out because the fine and wet grass was getting between the knife and the ledger plates. On the rivet problem you should be able to get a punch with a "divit" in it to make the rivet mushroom out and swell, hope this helps RLS

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