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These little three pound Woodward PM series governors controlled the fuel in the Mack truck engines in the 1950's.

Woodward type PM governor _reference manual 35000__.jpg Woodward type PG-PL governor ad from 1958.ThumbnailsWoodward type PM governorWoodward type PG-PL governor ad from 1958.ThumbnailsWoodward type PM governorWoodward type PG-PL governor ad from 1958.ThumbnailsWoodward type PM governorWoodward type PG-PL governor ad from 1958.ThumbnailsWoodward type PM governor

An example of this PM type small governor is now in the oldwoodward.com collection.

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