Yes,
Hook up the batteries in series. Jack should run correctly.
Hello, and thank you for your reply to my post. I can find no indication of the voltage on the motor (no tags or labels). However, I was able to get my phone alongside the steering wheel and get this pic of some solenoids. The one says 24V DC continuous. Is that enough to go on to consider it's 24v?
Lou,
like garland mentions, those batteries are 12v batteries.
I made a previous post explaining that you need to determine the operating voltage of the truck before you decide on how to wire the batteries up.
You mentioned there is no dataplate on the machine so you need to determine the voltage first.
Not sure why but that post has disappeared for some reason.
I said to look on the motors, they should have a tag on them designating the voltage they run at, this will tell you if the truck operates at 12v or 24v.
Then you can decide on wiring them up either parallel for 12v or series for 24v.
Quite a few early model yale trucks like that did run on a 12v system, it was fairly common but they did offer a 24v also. The 24v became more common later on.
Lou,
Looking at the picture you have with the post, are these the new ones you are connecting? If so they are 12 volts, not 24. The ones in the pictures have 6 cells, at 2 volts per cell, that's 12 volts. Use volt meter to be sure. Good Luck
Yes,
This will be 24 volts connecting parallel.
I just had a thought. Since the batteries are both 24V DC, and not 12V DC, should I still start with wiring them in parallel?
Thank you very much for replying to my plea for help! I will follow your instructions and update you again. I greatly appreciate it!
Lou,
Hookup parallel first. Most jacks this size are 24 volts. If it will not operate, connect series. I would bet the lift is 24 volts. Good Luck