# How to Replace an Idle Bearing to an AC
If your central air conditioner's outdoor compressor makes a hideous screeching or grating sound, the chances are good that it's time to change the idle bearing. The idle bearing is a ball bearing assembly that is attached to the belt pulleys inside the AC compressor. The actual bearing typically comes built onto the belt pulley in one unit, so replacement entails removing the belt and pulley. In addition to a terrible ruckus, a bad compressor bearing can place undue strain on your compressor and run up your electric bill.
Things You'll Need
- Socket set
- Replacement idle bearing and pulley
Instructions
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1
Shut off the power to the air conditioner compressor via the fuse box.
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2
Locate the screws holding the compressor cover in place and remove them and the cover.
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3
Restore power to the unit and turn the air on. Watch and listen to see which bearing-pulley is making the noise.
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4
Shut off the to the unit power again.
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5
Loosen the belt tensioner with the socket set and then remove the compressor fan's belt.
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6
Use the socket set to remove the problem's bearing and pulley. Install the new one with the socket set and then replace the belt.
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7
Slip the compressor cover back over the compressor and replace the retaining screws with the screwdriver.
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8
Restore the power to the air compressor unit.
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1
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