JD40C governor problem

[Don Little]

I have a 1955 JD 40C. The problem I have is the governor. After about an hour of running it starts oscillating. If I pull back on the throttle it will stop for about 15 minutes, and then it is done for a couple hours. I have checked float level, performed Governor adjustment, reset points, plug gap, and timing. Nothing seems to help. Anybody got some good ideas as to what is next.
Thank you
Don.

 

[TURNER]

sounds to me like you have something in your gas tank besides gas. I would check my fuel flow.More than likely its not a gov problem. You will know when a weight breaks or if it freezes up.

 

[Don Little]

Tank and filter were just pulled from tractor cleaned, lined and repainted. The sediment bowl has no FOD in it. The original gas line had a small leak so I put a new gas line on it. It would seem to me, if it were bad fuel, it would do it all the time. This is very specific, at ~1hour of running time, whether I am pulling logs or pushing dirt, Up hill or down hill makes no difference.

 

[LH TURNER]

Not always the case, a floating piece of trash could cause this,in 15 min or 2 hours. If it were electrical or gov more than likely not stop once it started for any period of time. good luck on finding your problem just trying to help.

 

[Anonymous-0]

If you got a test wire with a couple of alligator clips on it, I would try a hop from the lug on the starter (think it should be minus) and hook the other end to the non distributor side of the coil and give her a whirl. If you have changed to 12 volts, I would get some more advise on that method.

My 420 started shutting down on me and restarting. turned out that fixed it - was the ignition switch - sounds wierd I know, but it won't cost a lot to try.

good luck