Well, the problem is fixed and it did not had anything to do with the points or rectifier.... There was 2 issues...

1) the voltmeter that we used was defect. It was jumping around from 0 to 12, and like someone told me, it made no sense since if the alternator was to be bad, the voltage would go from 14 to 12..not zero.... or else the battery would also be shorted...

So after testing the battery (which was good), we used another voltmeter and found out that there was simply no charging from the alternator.. but at least the voltage was steady..around 12v...

2) At that point we were sure that when the new rectifier and points would come in by mail, that we would fix the problem.... In the mean time, my co worker found a wire underneath the key-lock that was disconnected... he reconnected it and now the battery was getting charged.... So it's obviously an important wire that somehow must send a signal to the alternator to charge or something... just not sure... but the problem is gone and my good ol buddy is back in action....

Just wanted everyone to know about my experience.

Cheers.

S.

yes.. It is written on the lift.

Here`s the serial : A010D14907Y

after doing some checking
are you sure about the model?
S30A?
is it not an S300A?
in the smaller weight class trucks all i can find is an S30C

got a serial number?

yeah, well, this was my first move before writing here, and the dealer told me....(drum roll)... 660$.... I asked him if the alternator was gold plated ! :-)

So much for this option.... As of now, I have ordered a points rebuild kit with a regulator....for a total of 15$ plus shipping. I will definitely try this route first and go from there... I will inform everyone the results of this fix once I receive/install the new points and regulator...

TVH part number
HY187458
drop the hy and contact whoever is the hyster dealer near you and you will have it

nah, I don't think so.... I'm pretty sure I remember seeing a 2 pin male connector on the side. After looking a bit at Delco remy documentation it seems more and more to be a 12SI model... Which has a internal regulator (System Integrated)...

I'll confirm tomorrow, but it seems I may be able to get away with a GM alternator (like you said), that was used between 1975-1985...

To answer your question, yes the battery eventually drains down when the liftruck is being used alot.... Seems the more it is used, the more the battery gets taxed since the alty do not charge it enough... It is worst if it is used many short times during the week... not so much is it is used on long period (I guess the battery takes just enough charge to hold a bit more like this...?)

Does that have a voltage regulator mounted right on the underside of engine cover that you flip up to access the motor? If so, it probably is a old mechanical type with points and that probably is causing the voltage to jump all over the place. That is a Delco system like they used in GM cars back then and you should be able get parts at a auto parts store.

P.S. Is the battery running down? Are you measuring the voltage at the battery?