Hi Folks,

Posted this on the Ytmag site and Mr. Schwiebert suggested I try posting here as well.

Helping my Dad with a OC-3 dozer.  He had an engine rebuild done,  and we are putting things back together.  To make a long story short,  we are having problems with the charging circuit.

Things are setup for a Positive Ground 6 Volt system.  We have verified all the wiring,  but it seems that the Gen/Reg output is +6 Volts instead of -6 volts in respect to chassic ground.  Wth everything connect and engine running, the battery starts to discharge through the Generator.

We have tried to re-polarized the Field on the Generator with procedures from the manual and website posters,  but it doesn&#039;t seem to want to fix the problem.

Here&#039;s a couple more things we have tried....maybe it will help lead to a solution.

After the engine is running,  we pulled off battery connection.  Reading from the Batt term on Regulator to ground,  we get + 6 volts and not -6 volts.  It is providing current,  because it will light the 6 volt lights.

We removed the belt and wires from Generator.  Applying -6 volts to the Gen term,  the Generator will &amp;quot;motor&#039;,  but in the opposite direction it would go when running with engine.

Lastly,  here are the part numbers from the Generator and Regulator.

Gen : Delco-Remy Part# 1101853-254
Reg : VR 851 6v POS

Are these the right parts for a Positive ground 6 volt system??

What are the proper procedures for polarizing the field coil??

Thanks to anyone who can help!!!!

John