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.

Using a flat head screwdriver, pry up an edge of the gauge cover. Remove the gauge cover.
  • Using a flat head screwdriver, pry up an edge of the gauge cover.

  • Remove the gauge cover.

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No parts from the old gauge will be re-used, so there is no need to attempt to preserve the parts. However, be careful not to damage the gauge housing. Pry up a corner of the gauge face plate. Use pliers to pull off the gauge face plate.
  • No parts from the old gauge will be re-used, so there is no need to attempt to preserve the parts. However, be careful not to damage the gauge housing.

  • Pry up a corner of the gauge face plate.

  • Use pliers to pull off the gauge face plate.

    • Be careful not to cut yourself when prying off the face plate, as the edges are sharp.

  • 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. Pull the gauge out of its housing.
  • Using pliers, grip the exposed brass piece and unthread the gauge by rotating it counter-clockwise.

  • Pull the gauge out of its housing.

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Remove the O-ring at the bottom of the threaded hole. Place a new O-ring into the hole.
  • Remove the O-ring at the bottom of the threaded hole.

  • Place a new O-ring into the hole.

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Apply medium-strength Loctite (green, 290) to the threads on the new gauge.
  • Apply medium-strength Loctite (green, 290) to the threads on the new gauge.

  • Apply a thin layer, but make sure it covers all the threads.

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Thread the new gauge into the floor pump by turning it clockwise in its housing. Thread the gauge until it is snug and the BAR/psi markings are aligned with the pump body. Gauge performance will not be affected by its position, so long as it is snug.
  • Thread the new gauge into the floor pump by turning it clockwise in its housing.

  • Thread the gauge until it is snug and the BAR/psi markings are aligned with the pump body.

    • Gauge performance will not be affected by its position, so long as it is snug.

  • Allow at least 30 minutes for the thread locker to set.

  • 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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Finish Line

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