Where is my fuel level sending unit

[ns_in_tex]

Our fuel gauge is acting up.
Hesston 1180 w/ cab
It has 3 fuel tanks
2 lower, probably on 1 sending unit
1 upper, probably 2nd sending unit
We looked yesterday with mirror and flashlight, but was unable to find it (Looking at lower tanks)
Thought we would find a picture of the tanks & it might show the location, but so far have not found picture.
Would anyone know where it is located or where to find a picture or parts diagram showing location?
Thanks

 

[Texasmark]

I don't have your tractor but this might help. I needed to access mine on the 6530C which has dual tanks and wasn't able to see anything as you said. So I pulled up the floor mat and found several access plates and upon inspection, found that the tank on the "curb" side of the tractor, immediately inside the door had a cover plate and gave me direct access. I changed out the OEM with a cheap commercially available, adjustable and went on my way. Been in there a couple of years now and haven't even thought about it till now.

 

[ns_in_tex]

Thanks, Texasmark,
I will look tomorrow. Seems I have notice similar in the past, but did not think to look there.