The fuse panel location on case 580 super E backhoe

https://www.scribd.com/doc/287576517/Case-580-Super-L-Backhoe-Manual-pdf

https://www.scribd.com/doc/287576517/Case-580-Super-L-Backhoe-Manual-pdf

Let's try again with a different link.

http://www.ritchiespecs.com/specification?type=Co&category=Loader+Backhoe&make=Case&model=580+Super+M&modelid=91936

Semper Fi,
Z

Prior Models CASE Construction Equipment


I am guessing it is a 580 Super E. If so, go to the above link and search for 580 Super E. It will, although slowly, give you a click able link that will let you view specifications. There are a few options, so I will let you calculate the final weight.

Semper Fi,
Z

It is under the side panel where the key goes in. Unscrew the panel and it will be on the right side.

Click on the link, I can only talk to you in automotive terms. I know nothing about a backhoe. The sending unit has to have voltage, correct? Get a resistor for empty and one for full, If the gage acts proper to the resistors, the problem is the sending unit.
If that isn't the answer you wanted, sorry, that's all I got.
http://www.tanksinc.com/index.cfm/page/ptype=results/category_id=159/mode=cat/cat159.htm

not charging can be the regulator not working, broken charge circuit wires
take it to an accredited auto electrical shop and have the out put voltage tested for dc voltage , not ac voltage
may have blown a diode in the rectifier on installation

Here's a link on bleeding your system. 580 Case 580D Backhoe repair summary for hydraulic and brake systems...

http://www.ioffer.com/i/case-580d-loader-backhoe-service-manual-580-d-bonus-162592324

Control valve is likely sticking.

I am including a jpeg photo of the fuse box layout. I hope this is what your looking for. If not please contact me and I will try assist you.