New Gauge Questions

duckrock

Member
I've decided I want at least one tractor with functioning gauges. So, I ordered a set off of this site to install on my 740. The new sensor went in no problem, but it doesn't seem
like it is sealing properly. The center sensor is loose enough that it can be wiggled slightly and a little antifreeze will seep out. I'm not sure I can get the 5/8 inch fitting any
tighter, I'm worried it will strip out if I try to turn it any more.

Any suggestions would be helpful.
 


The 5/8 bushing needs to be tightened first, then the little compression nut is tightened firmly down on the compression sleeve to make it water tight.
 
You need to use the pipe thread adapter that came with the gauge, the ?bulb? does not screw directly into the cylinder head.
 
Not sure I understand either one of these suggestions. The water gauge sensor line came with the sensor, 5/8 brass fitting, and a larger adapter. The larger adapter wasn't needed.
The sensor slides into block on right side just forward of the battery box. Then the 5/8 fitting screws into the block. It seems like the tapered end on the sensor should get pushed
tight into the block by tightening the brass fitting to prevent leaks. The 5/8 fitting is already tight and I'm worried it will strip, but the sensor is still slightly loose.
 

I don't understand their replies either. It's a straight thread plug, not a tapered fitting. It seals on the bulb's shoulder, not by the threads.

Is the head of the 5/8 fitting bottoming out before it's tightening down on the blub shoulder? If so, try to put a bras/copper washer in the hole(on the bulb) to take up the extra slop, and see if that does it for you.

Pat
 
You have to use the adapter, the bulb fits into the adapter and the threaded part holds the bulb in the adapter. The threaded piece on the bulb line is not meant to thread directly into the engine.
 
twist open a lock washer put it around the the tube straighten it out , use it as a spacer to push the bulb
 
Thanks for the video and info. But, that now creates new problems. Because the adapter is to large to fit in the block by the battery tray. And, the sensing cable is to short to
reach anywhere else on the block. I can't be the first person to buy one of the gauge kits off this site, so I'm not sure why it doesn't come with the correct adapter. Does anyone
know what the correct terminology, size, and where to buy the adapter? What is the "fix" if the right adapter isn't available? What is the possibility of using a washer as a spacer
and having it get into cooling passage? Does another vendor have a gauge the is more correct for these old fords?
 
Have you gone back and contacted YT store and see if they have an answer for you? They might have been through this before. First step is give the vendor a chance to see if they can help you. How about posting a photo of the port in the engine and the adapter with the gauge? Maybe someone will spot something.
 

cvphoto11995.jpg
 

Hmm, the themp gauge sensor was a flat seat that came out, was it not. Mine was. Not like the tapered seat on the one you show. The ones I have & have always replaced, have been a flat seat.

The picture of both of these two are also a flat seat. The one is a picture of the gauge I put into a Case 188. The Sunpro, is the same as my SunPro gauge, that I have for mine Ford.

Pat


mvphoto30953.jpg


mvphoto30954.jpg
 
Those are the only two pieces that came with
it. Inside the adapter is flared to match
the probe. Which is why the video link in
this thread made sense that the adapter is
required.
 

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