My diagram shows the starter AND the negative side of the battery grounded to the frame/chassis.
Unless you have an "isolated" ground alternator, the alternator is already grounded to the chassis thorough it's "frame", and keeping the 24 Volt system isolated from the chassis isn't possible.
Got a photo of the back of the alternator?
This sort of stuff makes posting and replying to posts about this sort of thing risky, because there are different versions of 24 Volt starters and alternators, some with all the internals isolated from the frames/housings and the wrong answer can let the $$$$ smoke out of an alternator or wiring harness almost instantly!
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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