How To Change an O-Ring

01
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What You'll Need

© 2009 David Muhlestein Licensed to About.com

What You'll Need

New o-ring
Pick tool
Lubricant - I prefer paintball gun grease

For this example I will change the o-ring on a bolt.

02
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Identify the O-Ring That Needs To Be Replaced

© 2009 David Muhlestein Licensed to About.com
Identify an o-ring that needs to be replaced by looking for cracks, warping or frayed edges. Common areas that need replacing are on the bolt, the hammer and on tanks.

Take your pick and place it under the edge of the worn o-ring. If you don't have a pick, you can use tweezers, a nail or some other small, pointed device.

03
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Remove the Old O-Ring

© 2009 David Muhlestein Licensed to About.com
Pull the o-ring off the bolt.
04
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Grip the O-Ring

© 2009 David Muhlestein Licensed to About.com
Take the new o-ring between your thumb and pointer finger.
05
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Put on the New O-Ring

© 2009 David Muhlestein Licensed to About.com
Use your middle finger to pin the o-ring against the back of the bolt and use your opposite pointer finger to pin the side of the o-ring. Use your thumb and pointer to pull the front of the o-ring over the front edge. O-rings will stretch enough to fit over whatever you need to replace but be sure not to over-stretch the o-ring or it won't function properly.
06
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Lubricate the O-Ring

© 2009 David Muhlestein Licensed to About.com

Take a dab of lubricant (I prefer grease) and rub it around the o-ring with your finger. This will help ensure a good air seal and improve the life of the o-ring.