Introduction

Replace the pressure gauge in your CNC floor drive pump if the gauge appears to be inaccurate, is malfunctioning or has stopped working all together.

Parts

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

    • Remove the gauge cover.

  2. 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.
    • 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 when prying off the face plate, as the edges are sharp.

    • Use pliers to remove the internal gauge mechanics.

    • Using pliers, grip the exposed brass piece and unthread the gauge by rotating the gauge counter-clockwise.

    • Pull the gauge out of its housing.

    • Remove the O-ring that is at the bottom of the threaded hole that the gauge threaded into.

    • Place a new O-ring into the hole.

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

    • 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 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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