hello all, I have a Hyster H50XM, s/n: H177B56725C that makes me want to set fire to it. Here's the skinny: it starts & runs just fine, but while it's running, the charge rate will occasionally drop off to 12 volts. It will come up to 14.2 if you floor the accelerator, but it will eventually drop back. I have an operator on this beast who is inattentive at best, so he keeps running it, oblivious to the charge indicator in the dash which results in an undercharged battery, jumpstarts, etc. So far I have replaced the alternator, had the new one bench tested, new battery, checked & cleaned all the engine & chassis grounds, checked every part of the wire harness I could get to for corroded pins or worn insulation, checked for voltage drops and high resistance throughout the charging system. I'm at my wits end here, and any pointers would be greatly appreciated.