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Thread: by-pass valve
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Old 4th Sep 2006, 16:46
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Willit Run
 
Join Date: Jun 2001
Location: In da north country
Age: 63
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I don't know what kind of machine your talking about, but basically, its to release hydraulic pressure from the nose steering system during push back, so the hydraulics don't blow things apart when the tug operator turns the nose gear with the tow bar.
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