Nothing. If the generator was tested it is polarized. If it was used in a vehicle it is polarized. If it has been sitting for years not used, the residual magnetism in the field iron cores might have dwindled to the point that it will not self start from lack of that magnetic force in the iron. Polarizling just puts that magnetism back in the field core (not the windings, the iron they are wound on) If a generator is switched from Pos ti Neg, polarizing is all that is needed to make it switch. You have been lucky, is all. Jim
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Today's Featured Article - Tractor Hydraulics - The Basics - by Curtis Von Fange. Hydraulics was one of the greatest inventions for helping man compound the work he can do. It’s amazing how a little floor jack can lift tons and tons of weight with just the flick of a handle. What’s even more amazing is that all the principals of hydraulic theory can be wrapped up in such a small package. This same package applies to any hydraulic system from the largest bulldozer to the oldest and smallest tractor. This short series will take a look at the basic layout of a simple hydraul
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