Is this a Pierce or Seagraves part?

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I am assuming this is a governor used on some vehicle?

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Bill, my 1921 Pierce 5 ton truck has something like that on it. Can you post a picture from more of a distance. Karl

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Karl here is a picture of both pieces, it can be adjusted to regulate fuel flow.

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That is a Seagrave part. It was connected to the discharge side of the fire pump by a water line and sits under the carburetor on the drivers side of the engine. . When the line that is charged is shut down the pressure is fed back to this device and throttles the engine down. I hope this explains it.

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