Near Intersection of I-35 & I-90 Southern Mn. | I would agree with the suggestions.
Several years ago I had a 4400 combine where the head would engage for a short time and then disengage.
Turns out the wire feeding the clutch had gotten partially worn through. There were enough strands left to engage the clutch but only for a short time. Cutting out the bad section and replacing it with good wire solved the problem. This bad section was under the seat where the wire was leading from the switch towards the clutch.
On that setup, it was possible to lock the clutch in the engaged position by using a special bolt. I carried one of these with me in case that the clutch failed again and I really needed to keep going.
Fortunately I never needed to use the bolt.
Edited by tedbear 8/17/2008 06:08
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JD 6620 Combine Magnetic Clutch Problems
