How to Replace the Pump Isolator on an Air Compressor

If leaking seals and service bills are distressing your compressor, it's time to face the fix. While air compressors can be as diverse as the individuals that use them, most models share some general characteristics and components. Whether you are inflating your tires or creating empires, eReplacementParts.com provides the parts, procedures and facts you need to fearlessly fix what fails you.

The pump isolator is a small rubber foot that helps insulate against vibration between the pump and the tank on an air compressor. Over time, the feet will wear down. This condition can expose the plastic pump housing to damages caused by continual contact with the metal tank.

Less than impressed with your compressor? Replacing the rubber isolator feet may be the solution. This article will show you how to complete the repair like an expert technician.   THE FACTS | THE FIX | THE FINISH ! DEPRESSURIZE THE AIR TANK.

Always depressurize the tank before servicing an air compressor. To do this, open the drain valve and wait until all of the air (and pressure) has escaped.

  REMOVING THE PUMP ISOLATOR  [top] 1. Remove the manifold cover.

Remove the retaining screw.

Lift the manifold cover away from the unit.

    2. Remove the pump assembly from the tank.

Remove the front retaining screw.

Remove the rear retaining screw.

Slide the pump assembly to the side.

Lift the pump assembly away from the tank.

  3. Remove the pump isolator.

SPECIFIX: There are four isolators on this compressor pump. Inspect and identify the quantity and condition of the isolators on your specific model before proceeding.

Slide the rubber isolator off the metal support bracket.

    INSTALLING THE NEW PUMP ISOLATOR [top] 4. Install the pump isolator.

Slide the new pump isolator onto the metal support bracket.

  REASSEMBLING THE UNIT [top] 5. Reinstall the pump assembly onto the tank.

Place the pump assembly onto the air tank.

Slide the pump assembly sideways to engage the isolator feet.

Secure the pump to the tank with the rear mounting screw.

Secure the pump to the tank with the front mounting screw.

  6. Reinstall the manifold cover.

Install the manifold cover.

Secure the manifold cover with the screw.

  THE FACTS | THE FIX | THE FINISH

A well-maintained air compressor can mean the difference between performance under pressure, and under-pressured performance. But you don't have to empty your pockets to keep your air tank full. As you just learned, repairing your air compressor is simpler than you think, especially when you follow our step-by-step guides. Not only did you refresh compression at a fraction of the cost of replacement; you have inflated your ability to fearlessly face the next fix, regardless of the pressure involved. Find your next fix here.   [top]