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NW Tennessee | I have a new 35' Macdon FD 75. We've only cut about 250 acres milo and about 200 acres of beans with it. Really like the header and the job it's doing, but the cutterbar has locked up 4 times when cutting beans. It only happens when you're cutting directly across the rows and the whole 35' hits the row at the same time. When we stop and get the stalks out of the cutterbar, it always starts right back like there is no problem. The drive belt is plenty tight and you can never smell the belt slipping. Seems to me like the hydraulic drive is stopping, not slipping the belt. I ran it the first day so I could get the hang of it and learn a little about it before I turned it over to the regular operator. It locked up with me on the second pass across the end. I tilted the cutterbar back and it hasn't done it again until it did it 3 times this afternoon. Wondering if there is a problem, or just running with it tilted too far forward? I did have operator tilt it back a little after it did it the first time today, but still happened twice more. Doesn't seem to be getting in the dirt at all, but it is cutting pretty close.
TIA |
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Western illinois | Characteristic of the breed. It's a major flaw as far as I'm concerned. They need a double sickle drive on heads that wide. My 36' will not cut across the rows unless I creep. I was outlining a waterway yesterday and it was a pia. |
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Central Sask. RM#254, Canada | We have a Honey Bee that does the same thing and it has dual drive ; We just have to slow down in tough stuff; That's the nature of hyd. drive . at least you can reverse it when you back up from the plug and go again without getting out of the cab . |
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Ks | It will happen. I take an open end wrench with me when it happens and pry between the hold down and section bolt to back it up. |
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ND | For what it's worth, I've had a hydraflex do that several times in tough wheat and beans and just about every other head we've had before that. |
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Western Kentucky | Have the same problem with our new Macdon. Our new Macdon also whines very loud compared to our old one. I can't seem to pinpoint where it's coming from but I'm pretty sure it's the drive/pump. |
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Northern, Illinois | I have a dual drive 40' fd75. I rarely stick the sickle cutting cross ways, have your dealer make sure the pump is putting out the proper pressure. They are not usually set high enough from the factory. My fd70 would slug cutting crossways at anything over 2 mph. |
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| I believe we were told that they are set that way by design (hydraulic drive has a safety) to prevent the belt from slipping. Try coming into it at a slight angle, and 35' against the row is a lot to cut in an instant maybe you went into it to fast? |
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Mid-Missouri | That is definitely fixable.
First of all, do you have a variable speed feeder house? Is it set at correct speed for your Macdon header?
Once you have it set at the correct speed, the sickle should be cycling at the correct speed, set at the factory. At this speed, you should not have an issue with cutting against the rows.
Our FD70 dual knife 40' was set too slow from the factory. A quick adjustment on the hydraulic pump at the header got it up to speed and working great. They seem to be set too slow from the factory. Our Lexion has a variable speed feederhouse, which I change often. Having said that, the header should be set properly at the factory for a "certain" feeder house speed.
I think the FD75 has a sickle speed adjustment, but I think it is different from the FD70. A good tech or tech support from Macdon would tell you how. |
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SE South Dakota | So are you saying that likely his feeder house was running too slow? What should be the speed of the pto shaft that hooks up to the header? My 35' sickle stops too when I try to cut at a right angle to the rows of soybeans.
Was my head running too slow? Also I was told by my JD salesman that rode along that I should speed up my belts. Well they were already running as fast as the system would adjust to. Would have speeding up the feeder house speed up my belts too.
Thanks and by the way I have a FD 75.
Jim J |
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NW Tennessee | This is more like the kind of response I was hoping for. Didn't want to hear it was something I'd have to live with after spending that kind of money on a header! You may be on to something with header speed. Header is on a 9760 and variable speed feeder house is running as slow as it will go, the same as we've always done with JD 630F's. I think backshaft is turning 470-480. I probably need to contact Macdon and find out what feeder house speed on this combine corresponds with the correct header speed.
Thanks, Eddie.
Edited by cotman 10/11/2015 22:45
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SW ND | According to the OM (section 3.7.7 page 71 online version)the John Deere feederhouse speed is suppose to be 490. |
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Western illinois | Mine runs at 560 rpm according to my monitor. I believe it is preset and won't run any faster. |
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West Central Iowa | Mine does the same thing. Dealer checked the sickle speed witch was too slow from factory but it still will stall if you go too fast or if stems are green. |
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South Central Nebraska | From what I understand this is the way they are suppose to be. The alternative is a smoked belt or broken sickle, pick your poison. Solution is, DON'T CUT AT 90 TO ROWS. You are asking for trouble doing that! |
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South cental Ohio | Plus 1. Ours does the same as others have said and the solution is just don't cut at 90* angles. |
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Mid-Missouri | Some parts of the manual and technicians don't always agree on is what speed to run the feederhouse. What is straight forward is the pulley rpm for the wobble box. That is in the book. Buy a $15 digital tachometer and check if for yourself so you are not at the mercy of a mechanic guessing where it should be set. |
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| I believe that on a 75 you should be able to reverse your feederhouse which will run the sickle backwards and that "should" clean it out without getting off the combine. |
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| We have double drive 40' fd 75s and it rarely stalls the sickle but the odd time it does just put the reverser on and it will clean sickle and you are rolling again. There is no need to get off and pry it or anything. |
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Problem with cutterbar on Macdon FD75
