Posted 3/26/2020 20:26 (#8141574 - in reply to #8141431) Subject: RE: A question for hydraulic experts.
I don't consider myself a hydraulic expert, but feel i know more than most. At the same time i feel pretty confident with electrical knowledge. However, we also own a JLG 40 that was made probably in the 70's. The one thing i know for sure about it is, if there is not at least 13 volts in the electrical system, it has a poltergeist in it.
We bought it CHEAP because it would not function properly. A new battery in it and it worked till the engine locked up. I repowered it with an engine from an Isuzu pup. It vibrates at an idle so bad it will shake the wires off the alternator. With an electric fan on the radiator it only takes 15 minutes before it goes nuts. Raise boom, it telescopes out, swing left, it booms down, etc. You have no clue what its going to do. It doesn't always do the same wrong thing.
Put the wire back on the alternator or put a battery charger on it and it works fine. It's definitely an electrical problem, but makes no sense to me.