Do I tighten this more? Tractor temperature sender: Super 90 Massey Ferguson

[bradleydavidgood]

You should not be using chasers without knowing the thread gauge. If you damage the threads, nothing will fit.

I did not use enough force to cut anything. I was just seeing if it was the same thread or not.

 

[bradleydavidgood]

Clean this off (arrow) with a wire brush so we can see if Jim’s theory about the tapered seat is on track. View attachment 165598

Clean it off and then do what?

Thanks

 

[bradleydavidgood]

The seat on the adapter that came with the new sender looks similar in its angle as the seat in the back of the hole in the head. The new sender is not completely flat, but has a small flare, very small, towards the inside of the seat area. My point is that, if the new adapter that came with the sender has the same looking angle as the head seat then maybe it would work. And when I look into the threads in the head, the last few threads are corroded and rusty, as if the old sender stopped before threading into them. And the new sender gets really tight just before fully seating down. So it is possible that if I continued to turn that new sender in, it may be hard to turn through those rusty corroded threads, but it may then seat and seal OK. But I'm not convinced that I have the correct sender, due to the fact that I could turn a 5/8 - 18 chaser die completely onto the old sender with no resistance, but it only went about half way on the new sender then stopped hard. Next step is to call the supplier and talk about these things and ask to contact the maker of this sender and verify the thread type and talk about the non tapered seat

 

[Ron(Ont)]

I think take another photo.

 

[used red MN]

I think take another photo.

Winner, an old tractor mechanic should be a little intuitive. A tractor flipper maybe not?

 

[bradleydavidgood]

Thanks for the input and ideas. I think I'm good. See two more short videos.

 

[bradleydavidgood]

 

[m16ty]

You should have two pieces one piece that threads into the tractor and then you have the nut on the probe. The probe seats into the piece that threads into the tractor, use no sealant on the probe or the nut.

 

[Jim.ME]

Good, you got it sealed; I can't dispute that. In the end cleaning the threads out made the difference. I will say I have not seen a probe with a square shoulder before the one you have shown here. I hope the square shoulder on the probe is not the coming thing on replacement gauges, I still prefer a probe with the original type of taper, especially on a unit with the seat made in the housing. JMHO.

 

[used red MN]

Sounds like you persevered!

 

[used red MN]

You should have two pieces one piece that threads into the tractor and then you have the nut on the probe. The probe seats into the piece that threads into the tractor, use no sealant on the probe or the nut.

I learned something new in this thread. I was in the same camp as you seeing how any temp probe I ever ran across utilized an adapter bushing. Apparently in some cases the receiving hole for an engine temp probe is machined to accept the probe with straight threads and a seating land for the temp bulb. Leave it to them Brits at Perkins to throw out a curve ball.

 

[Jim.ME]

I learned something new in this thread. I was in the same camp as you seeing how any temp probe I ever ran across utilized an adapter bushing. Apparently in some cases the receiving hole for an engine temp probe is machined to accept the probe with straight threads and a seating land for the temp bulb. Leave it to them Brits at Perkins to throw out a curve ball.

I may be wrong however it seems like I have seen this same set up (seat made in the head, or a housing) discussed for some early Fords, like the N series.

 

[bradleydavidgood]

Sounds like you persevered!

I have developed a lot of patience and perseverance with auto and tractor work. It's my favorite part of doing it. I love going in deep on something and learning all about it and taking it to the end and coming out having learned a lot and with a good solution. And sharing the whole process with others.

 

[bradleydavidgood]

I learned something new in this thread. I was in the same camp as you seeing how any temp probe I ever ran across utilized an adapter bushing. Apparently in some cases the receiving hole for an engine temp probe is machined to accept the probe with straight threads and a seating land for the temp bulb. Leave it to them Brits at Perkins to throw out a curve ball.

Good!