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Discussion Starter #1
Have a 2009 FD 70 not floating properly. Have changed vertical rods over to eyelets a couple years ago. Lately header wont sit right on adapter. When locked up it's level but when unlocked it sits uneven when you lower it and lift it back up. Right wing doesn't want to drop down sometimes when floating down the field. Acts like it has a catch in it. So I put new needle bearings in the bellcranks on both sides but that didn't help. Now am wondering if there is something else to check why it doesn't sit level on the adapter and why that wing acts like it has a catch in it when going down the field. Thanks.
 

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Have you called Macdon product support? They are fabulous at helping people solve these type of issues. They answer the phone anytime of day and it is free.
 

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Have you called Macdon product support? They are fabulous at helping people solve these type of issues. They answer the phone anytime of day and it is free.
Wow! That would have been great to know when we were having hydraulic problems!

Nobody has actual product support any more. It should be the law!
 

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I had the same issue and it was the spring float being out. I got it pretty close but the issue with the FD70 is it’s really hard to check the spring tension because you can’t use the torque bar and checking with a fish scale isn’t that easy too.
 

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Discussion Starter #8
Subframe lock. The ones that lock the adapter out of float. I can lock them easily. Today when I have been running it when that wing hesitates to go down when it does finally slam down I notice the feeder house moved down and triggers it to go down so now am wondering if the cables are sticking. They are only 2 seasons old. Could something else in that mechanism be sticking where them cables are attached ? Like mud or chaff stuck somewhere it's not supposed to be? Thanks
 

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If the cables for height control work, the indicator will move appropriately. Stop and raise header, should go near 0, lower header slowly, should go toward 4.

Are all four small springs still attached and working? These small springs can break. They are the same springs as the auger hold down btw.

If you put the wrench on the wing mechanism, can you move it up and down freely?

I suggest watching a few youtube videos that explain MacDon settings. Also, toss the two upper covers off for the remainder of harvest to get a good visual on some of what is going on during terrain changes.
 

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My issue was when we would lift the table up the header would actually go down on the one side. I could see from looking at the sub frame to the header that header was pulling to the left. When u raised the header all the way up with a lexion combine you could actually see the whole header shift to the left side. The right springs were tightened up way to much.

It seemed to work fine in flex mode but with the wheels down we had to run the wheels in different holes to compensate. Like by a few holes too. There is a difference in springs between the FD70 and 75. The Fd 75 that I have has a inside spring on the big coil springs on the right side of the sub frame which the 70 does not. I still want to make something that I will be able to check the sub frame tension on the 70 with the torque wrench as that was my trouble all a long.
 

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Our FD70 should have came with an inner spring on the right side but didn't. Again, something you don't catch until after warranty period. Because it is a a 40' with dual knife and transport package and now air bar, it needs more spring.

To fix it, MacDon wanted coin for the heavier spring package, so I unthreaded the spring bolts and tapped the threads farther. This allowed the springs to be tightened enough extra that it is balanced properly.

The spring setup is fair but I really think MacDon would be better off with some sort of hydraulic float and wing control. Or at least make it 90% spring effort, and 10% on the go hydraulic assist that is quickly adjustable. It is ornery to go from float to cutting off the ground, requiring adapter spring adjustments to get each to work properly. On top of that, because of our terrain and my pickiness, I shim and tighten etc. the wing lock mechanism which drastically helps height control when cutting off of the ground. Then, when going back to float mode, you're much better off if you made notes of where the spring measurements were.
 
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