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.

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.

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.

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.

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.

Finish Line

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