I don’t know the exact engineering of a JD combine of that era, we ran IH. I do believe as a whole during those years the configurations of most all machines were fairly identical. Engine up top behind the grain bin, belts bringing the power down to the transmission between the drive wheels. So to shift the transmission long rods and linkage were use to transfer motion from the gearshift to the trans. I don’t know about the JD but the IH’s we had...101, 403, 715... all had three speeds. One rod would move to shift 1st and reverse, the other to shift 2nd and 3rd. Now the JD may have a 4speed trans. This would require 3 linkage rods, where reverse is the only gear shifted by one of the rods. So what I am essentially saying is have someone move the gearshift through all of those the gears positions while you watch the rods to see if they are ALL moving. If they are not then likely there is something not working right in the gearshift mechanism at the operators station.
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Today's Featured Article - Timing Your Magneto Ignition Tractor - by Chris Pratt. If you have done major engine work or restored your tractor, chances are you removed the magneto and spark plug wires and eventually reached the point where you had to put it all back together and make it run. On our first cosmetic restoration, not having a manual, we carefully marked the wires, taped the magneto in the position it came off, and were careful not to turn the engine over while we had these components off. We thought we could get by with this since the engine ran perfectly and would not need any internal work. After the cleanup and painting was done, we began reassembly and finally came to t
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