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sandtrooper

Berg emergency pull-push knob... charge?

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Can anyone say what this might be for... truck, auto or whatnot? It is about 2 inch diameter - lightweight non-ferrous metal. Found in a box of truck parts in garage sale.

 

Thanks in advance for any skinny on this. 

 

rg669a.jpg

 

rg669c.jpg

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Yes. Pushing in supplies compressed air to the 'spring brakes' releasing them so they will roll. 

Pulling it out (or breaking the air line to the trailer) lets air escape and the springs automatically apply the brakes in a full lock situation. 

Today this control would be a yellow diamond shape. 

brake.jpg

Edited by m-mman (see edit history)
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