John, if its converter to 12 volt negative ground, jumping is similar to a car or truck POS to POS NEG to NEG and don't make the last connection near the battery top where explosive fumes can be present. Jumping a very weak battery with a good one poses some hazards including explosion if not done correctly and you sound inexperienced
HOWEVER if it reads 12 volts its approximately 50% discharged. As an electrical engineer I strongly suggest you first fill electrolyte to the proper level,,,,,,,,,,, CHARGE THE BATTERY AND HAVE A SHOP LOAD TEST IT,,,,,,,,,,Insure all battery cables and ground cable are good n tight and not corroded.
Checking electrolyte and charging the battery and having a shop test it is soooooooooo easy n cheap and I try it FIRST before jumping although sure jumping (if done correctly) may get you started
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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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