FD140 tilt issues - The Combine Forum
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post #1 of 42 (permalink) Old 07-29-2018, 04:59 PM Thread Starter
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FD140 tilt issues

We bought a new FD140 this year on a Case 8230. The adapter has the double float sensor option. I set the header up properly according to the book, but when I use AHHC it wants to tilt to the right, or positive 0.6 to 1.1 degrees. Any suggestions on fixing this problem? Im in rigid mode cutting wheat.

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post #2 of 42 (permalink) Old 07-29-2018, 06:03 PM
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Originally Posted by Jason Anderson View Post
We bought a new FD140 this year on a Case 8230. The adapter has the double float sensor option. I set the header up properly according to the book, but when I use AHHC it wants to tilt to the right, or positive 0.6 to 1.1 degrees. Any suggestions on fixing this problem? Im in rigid mode cutting wheat.
Interesting.
That same setup on a Claas it likes to average lateral reading 55 ish (0 to 100 scale) so also slight lean to the right.
I don’t know why, I just live with it, not functionally significant.


Last edited by Don Boles; 07-29-2018 at 06:05 PM.
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post #3 of 42 (permalink) Old 07-29-2018, 10:34 PM
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Is it correcting for the different weights of the gauge wheels?
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post #4 of 42 (permalink) Old 07-30-2018, 07:09 AM Thread Starter
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Interesting.
That same setup on a Claas it likes to average lateral reading 55 ish (0 to 100 scale) so also slight lean to the right.
I donít know why, I just live with it, not functionally significant.
0.6 degrees just bothers me, but over 1 is so far off that I have to adjust it every few seconds. That doesn't work for me. My cousin suggested that it could be the tilt cylinder. The right side certainly is heavier with the right transport wheels.
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post #5 of 42 (permalink) Old 07-30-2018, 07:11 AM Thread Starter
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Is it correcting for the different weights of the gauge wheels?
I followed the set up instructions and set the float the same on both sides, then backed off the right side 2 full turns. They say that is for the double knife drive. But anyone who has lifted up both gauge wheels on the right side knows those buggers are heavy!
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post #6 of 42 (permalink) Old 07-30-2018, 07:37 AM
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I set my 2152 so it takes more to lift the right side because of the gauge wheels. Say like 20lbs to lift left corner and 50lbs to lift right corner. Did I get that backwards? It is early and no coffee yet.
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post #7 of 42 (permalink) Old 07-30-2018, 08:53 AM
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I set my 2152 so it takes more to lift the right side because of the gauge wheels. Say like 20lbs to lift left corner and 50lbs to lift right corner. Did I get that backwards? It is early and no coffee yet.
Ha ha, me neither!
Come to think of it, 40í and 45í flexes with full equipment (upper cross auger, transport, DKD) MacDon actually specs to back off right two springs two turns after best and even float is obtained.
Perhaps that is a procedure no long needed with lateral tilt control?
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post #8 of 42 (permalink) Old 07-30-2018, 09:26 AM
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Originally Posted by Jason Anderson View Post
We bought a new FD140 this year on a Case 8230. The adapter has the double float sensor option. I set the header up properly according to the book, but when I use AHHC it wants to tilt to the right, or positive 0.6 to 1.1 degrees. Any suggestions on fixing this problem? Im in rigid mode cutting wheat.
Does that mean the adapter has two sensors, a left and a right. Which should mean it can auto tilt side to side hydraulically and not just floating on the springs? My first thought was the older ones needed a Y cable to feed header signal to both sides of the combine sensor system or it would try to lift one side only, getting things off level. I think I am behind the learning curve on your problem though???
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post #9 of 42 (permalink) Old 07-30-2018, 09:45 AM
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Does that mean the adapter has two sensors, a left and a right. Which should mean it can auto tilt side to side hydraulically and not just floating on the springs?
Some brands use all three sensors keeping the stock one online too but not Claas.
Simplistically, it keeps springs the same tension on both sides reguardless of the ground contouring of the header.
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Last edited by Don Boles; 07-30-2018 at 10:17 AM.
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post #10 of 42 (permalink) Old 07-30-2018, 11:20 AM
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I can suggest a reason why your tilt is off a "degree" or so. But not why. Every MacDon head I have worked on (FD70, FD75, FD1x0), has a slightly different overall travel for the sensors left and right. IIRC, it was about 0.5V difference. I could never see any reason for this---its apparently something in the frame design.

Even though your combine "calibrates" the sensors, I have noticed before that if you have a different "travel" on the left and right sensor, it often will say that you are "Off level" when you are in the middle of the range.

The other thing that really screws this up is how far the MacDon float optimizer drops when you let the feeder all the way down, way past normal operating range. This kinda screws up a good cal--which should really only cover operating range.

You might try adjusting your sensors to the same voltage when in "operating position". Adjust everything dead level on a flat surface, set your head down to 2 (or wherever you normally run) on the MacDon height indicator, and adjust both sensors equal. Get a pile of blocks or a jackstand, and block the front plate of your feeder so the float optimizer stops when the indicator hits 0 (bottom of the normal operating range.) Don't let it drop all the way down like you are disconnecting. Then recal your combine. If that does not help, its not the sensor adjustment causing your problem.

The other nice thing about doing the above is you can "double check" your system. You're out cutting and it says you are one degree off. Stop, look at the voltages in the Diagnostics. Are they close to equal or way off? Are you REALLY tilted way over, or does the combine computer just think you are?

The other thing is, any sensor has a "accuracy" spec--usually 5-10% allowable variation. I've seen as high as 20%. Slight differences can sometimes be traced to this---just the fact that sensors are not identical. I agree 1 degree seems pretty high.


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