O-rings are designed to contain thousands of pounds of pressure by creating a seal between two or more parts. O-ring measurements are defined by the inside diameter and the thickness.
Of the many causes for O-Ring failure, the most common are:
• <u>Extrusion and Nibbling</u> - O-ring has ragged, tattered edges. These are commonly caused by pressure spikes which shear off tiny "bites" from the o-ring, or caused by clearance gaps.
• <u>Abrasion</u> - One or both sides of the o-ring appear rough and slightly flattened. Commonly caused by a contact surface that is too rough, contains grit or is too smooth to allow lubrication.
• <u>Over Compression </u> - O-ring is flattened on both sides and may have a "ring" split along its length. Commonly caused by excessive pressure or heat.
• <u>Heat Hardening</u> - O-ring has a pitted or cracked surface, and often is flattened on both sides. Caused by temperature exceeding o-ring capacity.
• <u>Weather/Ozone Cracking</u> - O-ring is covered in small surface cracks. Caused by exposure to ozone, UV rays and air pollution. Excessive seal stretching causes similar cracking.
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★★★★★
★★★★★
O ring for porter cable draining nailer
Fast shipping worked perfectly
Anonymous - March 10, 2022
Verified Purchase
★★★★★
★★★★★
Good quality
Arrived in good condition
Guest - August 8, 2022
Verified Purchase
★★★★★
★★★★★
30 yr old Porter Cable framing nailer
I ordered the O-rings for the trigger assembly, of my porter cable framer. Parts came fast and worked perfectly. I’m so happy with it I returned the new Ridgid framing nailer I bought. Great parts company. Thank you ereplacementparts You guys are the best. Dave M
Guest - October 22, 2022
Verified Purchase
★★★★★
★★★★★
Go-To Source for parts.
This was one of several o-rings I ordered to repair a Porter Cable brad nailer. All were exactly what I needed. eReplacementparts is my go-to source for parts for my older equipment.
William - May 28, 2023
Verified Purchase
★★★★★
★★★★★
Just what was needed.
Parts fit and did the job.
Guest - April 13, 2022
Verified Purchase
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Everyone said top bumper causes the problem. The bumper was shot so I replaced it. Still did the same thing. Messing with it I found that if I pulled on the trigger pin just a little bit it would let go and retract the driver. I pulled the trigger assembly out and started messing around with it. No luck. However I now noticed a slight air
... Read more leak at the trigger. I purchased all new O rings and trigger pin and spring. Installed and WahLah. it works. Thanks for your help with parts. Have referred U to friends.
Trigger assembly is screw in type; Removed retainer and the pin that secures the trigger, removed trigger then used wrench to loosen and remove the trigger assembly.
Disassembled the trigger valve, breather valve, plunger.
Removed and replaced all the o-rings: 1x- 883831, 1x-883935, 2x- 883936, 1x- 883938, 2x- 883848, 1x- 8839
... Read more42, 1x-urethane retainer 890725.
Reinstalled trigger valve assembly.
Air leak is gone, nailer working great!
Removed the top cap
Replaced piston bumper and o-rings.
Installed the top cap
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