Introduction
Replace the pressure gauge in your classic floor drive pump if the gauge appears to be inaccurate, is malfunctioning or has stopped working all together.
Tools
Parts
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            Pry up a corner of the gauge face plate. 
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            Use pliers to pull off the gauge face plate. 
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            Use pliers to pry out the internal gauge mechanics. 
 
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            Using pliers, grip the exposed brass piece and unthread the gauge by rotating it counter-clockwise. 
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            Pull the gauge out of its housing. 
 
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            Thread the new gauge into the floor pump by turning it clockwise in its housing. 
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            Thread the gauge until it is snug and the BAR/psi markings are aligned with the pump body. 
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            Allow at least 30 minutes for the thread locker to set. 
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            Test the pump to its highest rated pressure and listen for leaks. If you can hear leaks from the gauge, tighten it. 
 
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