JeffInCO
Bronze Member
I used the 3-point on my L4740 for the first time this weekend, with a 72" box blade. When I bought the tractor, I had the dealer install the draft control option... so today was the first time that I've tested it.
Unfortunately, it seems that the draft control is not working at all. Position control works fine, with one minor issue.
Since I suspected that draft control wasn't working, I tried raising the box blade just to the point that was off the ground. I then used a crowbar to rotate the box blade forward a very small amount, which puts pressure on the top link. I expected to see the 3-point lift the implement up a small amount, but nothing happened at all. I could even see the draft control linkage move ever so slightly.
As for position control, there's also a minor issue. If I move the position control lever to the fully-raised position, the 3-point lifts the implement to the maximum height off the ground (as expected), but it seems that it continues to try to lift the implement even higher, which it cannot. I can hear the hydraulic pressure relief valve open, and the tractor just sounds very unhappy.
Every now and then, this doesn't occur. Instead, the implement goes to the top, then the 3-point clicks and shuts off it's attempt to further raise the implement. I suspect this is how it's supposed to work.
So, now, my questions:
1) Does anyone have the installation instructions or shop manual for the draft control? Is there any published test that I could perform? Any suggestions as to what I might check?
2) Should the position control behave as I described above? If not, what might be wrong?
Thanks,
Jeff
Unfortunately, it seems that the draft control is not working at all. Position control works fine, with one minor issue.
Since I suspected that draft control wasn't working, I tried raising the box blade just to the point that was off the ground. I then used a crowbar to rotate the box blade forward a very small amount, which puts pressure on the top link. I expected to see the 3-point lift the implement up a small amount, but nothing happened at all. I could even see the draft control linkage move ever so slightly.
As for position control, there's also a minor issue. If I move the position control lever to the fully-raised position, the 3-point lifts the implement to the maximum height off the ground (as expected), but it seems that it continues to try to lift the implement even higher, which it cannot. I can hear the hydraulic pressure relief valve open, and the tractor just sounds very unhappy.
Every now and then, this doesn't occur. Instead, the implement goes to the top, then the 3-point clicks and shuts off it's attempt to further raise the implement. I suspect this is how it's supposed to work.
So, now, my questions:
1) Does anyone have the installation instructions or shop manual for the draft control? Is there any published test that I could perform? Any suggestions as to what I might check?
2) Should the position control behave as I described above? If not, what might be wrong?
Thanks,
Jeff