Re: Not alot of charging? on w4

Posted by Bob on September 25, 2004 at 11:31:26 from (66.163.134.177):

In Reply to: Re: Not alot of charging? on w4 posted by Bob Quale on September 25, 2004 at 10:07:47:

If it is putting out 8 Volts at high throttle, polarizing it will not help.

It's hard to say what it should put out with the field grounded, as that is dependant on the condition of the battery. With no load (open circuit) the generator may put out 12 Volts or even more with the field grounded, but connected to a battery, the voltage will go up as the battery is charged (overcharged).

When the shop checked the generator, they may have only checked it at a fixed (fast) speed for Volt and Amperage output. If they have an old service manual for the generator, it probably gives a spec (RPM) that it should start charging, and pull in the cutout relay. They may not have checked it in that much detail.

Not charging at low RPM's could be as simple as crud between the commutator bars, or as serious as a partially shorted armature or bad or incorrect field coils.

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