O-rings are made to contain thousands of PSI 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 among power tools 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 it 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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★★★★★
★★★★★
A perfect O Ring
These DeWalt O Rings are made of a material that decomposes and turns to gel over time requiring replacement. This one I received plus another one I needed was fresh and in perfect condition. Got my framing nailer working again.
Guest - August 18, 2021
Verified Purchase
★★★★★
★★★★★
The nail gun is working just like it was new! Thank-You for sending me the right parts to repair it.
The parts I ordered fit perfectly & the nail gun is working excellent.
Guest - September 26, 2023
Verified Purchase
★★★★★
★★★★★
Fast delivery
One of the 3 o-rings were not the correct size but I was able to use the original so the repair was successful.
Guest - November 26, 2021
Verified Purchase
Customer Repair Instructions
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Easy
30 - 60 mins
(13 rated repairs)?
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Gun stopped working. Took it apart, noticed many O-rings got over heated and stretched or ripped
Replaced stretched O-rings (from heat), Replaced Trigger Valve (from heat and dirt), Cleaned dirty oil and metal fragments out of the inside of gun. Works as brand new. Make sure to check all O rings. If any are out of place, pinched, or stretched, it will stop your gun from working.
Took it apart, cleaned it up. Replaced all the o-rings & seals. Pretty simple repair. The parts diagram on your website was perfect. Helped me order the correct parts.
Nailer was leaking air and would not fire. I first removed the back cover and replaced all of the clear (yellow) o rings which were deteriorated and put it all back together. Was still leaking air around d trigger. I ordered a new trigger assembly and replaced it. Works great now
This part is in stock in our warehouse and will ship out within 1 business day of the order being placed.
New stock is on the way! On order parts usually ship within 7 business days.
Item is not in stock and usually ships 10-15 business days from the time you place your order.
This item is no longer being made by the manufacturer, and cannot be added to your shopping cart.
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Mail-In Recycling Rebate
Some of the parts we sell are eligible for mail-in rebates since we can recycle them. We will display any applicable rebates in your shopping cart. To redeem your rebate, contact Customer Service after you have received your part.
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