Ford 4000 Tachometer not working

[fibrostic]

I just got my "new" tractor. After countless times of coming to TBN for advice (thanks soundguy) my 8n is running well enough to sell. So I bought a Ford 4000 3cyl diesel (still trying to locate the serial to determine year) This has the generator with the Tachometer screwing in to the gearbox on the back. I unhooked the cable from the generator and spun it by hand and got the tach gauge to move, so I know that the mechanics in the cluster are good and there is not an internal break in the cable. I started the tractor and I can see the gearbox on the back of the generator spin, so no issue there either. Seems like i am missing a collar or a shaft of some kind that slips over the metal on the tach cable and that snugs up in the gearbox?

On a seperate note. The fuel and temp gauges also do not work. I pulled the cluster and found a mouse nest behind the panel. Cleared that all out and tested the power going to each side of the cluster (one for each gauge i think) and got good readings. Also checked the ground to the cluster and it read good as well. Thoughts?

 

[Sawdustsmb]

There are 2 screws holding a cover on the gearbox on the back of the generator if I remember correctly. There is a fiber gear in there that generally is stripped. It may be turning with no back pressure on it. But I bet you need a new one. Check the terminals on the fuel gauge on the top of the tank. There should be a resistance reading there. Probably will show an open - needs a new float mechanism. It will last for a little while. My experience with my two 4000s. A stick works real well. Be carefull you will waste more fuel with the stick than you will running it. Temp sensor is up front behind the fan.

Good luck - great tractors!

Bob