Hi Brent,
Those BD2G are a good little machine.
The problem with under the hood sounds like a cooling issue...get any auto mechanic or a handy friend to check it out.Even in the hot sun,it should run cool enough to work properly.Is the radiator blocked?
I assume it's a manual gearbox machine ,as opposed to direct Powershift,fitted with 6 way PAT blade.
Maybe you have some blade pin wear or hydraulic seal wear in your blade.
The problems with the fuel gauges is common to BD2G machines....Fuel & Hour
meters are often found to be bad (typical electronic rubbish) & the gauge set costs hundreds to replace.I tend to add my own normal gauges ,as replacing the electro-crap will only fix the problem until it fails again ....which will happen.
The lights are also a problem to fix ,as rust is often a problem.I tend to buy a set of 12V headlights from the auto shop & put 24Volt globes in them (if suitable)....or just buy 24V ,but they are expensive.
Pyramid plates are made for swamp work,& these machines in Japan are used in snow & mud applications.They wear quickly on dirt work,as they are under more stress in non-soft conditions....plus they don't dig in well for excavating work.
If you're going to keep the machine,try to put a small set of scarifiers on it,to rip the ground you need to dig....it will extend the life of your machine a lot,& make your job easier.
Check & replace all oils ...for the sake of starting out fresh & keeping records.
I can get parts & books....but Rhine Equipment in Tacoma is your nearby dealer.The Operator manual has the lube charts & maint. tips you need.
Quote your Serial number to get the right books.
Good luck & contact me if I can help further.
Jim