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Implement Alley Discussion Forum

Horse drawn sickle bar

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Vince H

04-26-2005 11:17:25




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It is not hay season yet, but I was starting to get equipment cleaned up for the spring and had a question about my sickle bar. It is a old McCormick Deering horse drawn sickle that is now pulled by a tractor. Most of the equipment I have has been inhereted so instructions for most of it is almost impossible to get and my great-grandfather passed away a few years back. No one else in the family knows a lot about the equipment so it is mainly a guessing game.

Last year when using the sickle bar it kept jamming up on me in the last several teeth. After having this happen several times I got tired of it and ran the tractor through the standing hay first with the sickle bar facing the outside and cutting the hay that had already been driven over. The last few teeth stayed over the hay that had been broken over by the tires. This got the job done with no more jamming, but I lost probably 15-20 bales of hay because the broken hay didn't get cut. Does anyone have any idea why it may be jamming in the last few teeth. I am thinking I may just need to sharpen them a little better, or is this a problem that I am just going to have to live with. Thanks in advance.

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hdlong

04-27-2005 06:14:10




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 Re: Horse drawn sickle bar in reply to Vince H, 04-26-2005 11:17:25  
I foregot to mention about ledger plate on outside shoe which normally only has inside cutting edge so the section and a half will not do any good unless you change ledger plate to a double edge which will than cut on back stroke Hang in there you will get the right thing sooner or later



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paul

04-26-2005 12:16:27




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 Re: Horse drawn sickle bar in reply to Vince H, 04-26-2005 11:17:25  
There is something wrong, it should not be like that.

If it balls up hay on the very outside section, and drags along more & more plugged hay, then perhaps a section & 1/2 that the other person mentioned would be the right fix. Many cutters can be helped with this. The outermost sickle section is replaced with a secion that has a second, smaller, sickle section on it, & does a much better job of cutting the grass on that end.

Normally if the bar is out of register then all of it would give problems. Since you mentioned sharpening, are the sickle sections still full & wide, or are they ground pretty skinny in that area? See that the sickle sections in that area fully cut on both sides as the mower goes through one cycle.

Hold downs are the clamps that keep the sickle bar down flat & level against the guards. Very important these are not clamping the sickle, but almost snug all the way across. Typically these get adjusted with a hammer or have sheetmetal shims bolted under them...

Worn ledger plates ( the lip of the guard that the sickle cuts the grass on) will also cause this. They really should be very, very sharp, much less angle on them than the sickle sections, but as crisp of an edge. They are often overlooked.... One _can_ sharpen them in a pinch, but this makes them narrower, and you run into the above register problem where the sickle doesn't move back & forth enough to make a full cut.

A bent or twisted, even slightly, bar or sickle can cause this.

You likely have some combination of the above. I would look to the end section & convert that to a 1-1/2 end section - you can find them at the typical farm supply places.

--->Paul

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hdlong

04-26-2005 11:34:47




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 Re: Horse drawn sickle bar in reply to Vince H, 04-26-2005 11:17:25  
sounds like hold downs not tight enough against section knifes and this lets knife raise increaseing the distance between knife and rock guard ledger plates and the ledger plates maybe worn over on the edges. Must have good sharp edge on ledger plates and not to much clearance between the two. I have mowed alot with MCD #6 & #7 with horse's and tractor don't go to fast with tractor or your ground speed will be more than strokes of knife bar unless you have high speed gearbox mower the slower the better DON'T DESTROY A GOOD MACHINE

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Bkeepr

04-26-2005 11:26:19




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 Re: Horse drawn sickle bar in reply to Vince H, 04-26-2005 11:17:25  
Don't know for sure, but right after I bought my first sicklebar mower--an old Ford 501-- it was doing the very same thing. I asked my old neighbor and he told me that somebody must have once put on the wrong knife section when they replaced it. The first and last knife section on the blade (on mine at least) are supposted to be "half sections" (actually this is a section-and-a-half) that allows enough room for the cut hay to clear. Put on the right section and it has been fine ever since.

Tom A

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oh, one more thing

04-26-2005 11:28:09




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 Re: Horse drawn sickle bar in reply to Bkeepr, 04-26-2005 11:26:19  
There's a magazine that caters to horse-drawn equipment that sells many reprints of manuals. Bet you could get the right manual from them. It's called Small Farm Journal, you should be able to find them with a web search.

Bkeepr



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Jim Calhoun

04-27-2005 09:59:29




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 Re: Horse drawn sickle bar in reply to oh, one more thing, 04-26-2005 11:28:09  
Most early sickle mower technology is similar, so if you can look at a manual from any pitman driven mower you should gain some insight.

If you have everything adjusted to it's proper specs and have s straight sharp sickle and your ledger plates are good, you should be in business.



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