16 ga finish nailer leaking air


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Old 05-14-24, 10:30 AM
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16 ga finish nailer leaking air

My Porter Cable finish nailer (Model FN250A, type 1) has been great for a lot of years but has decided to leak air significantly. I am having difficulty locating the area of the leak. It seems to be coming from around the trigger. The manual indicates an overhaul kit is needed. Do you agree? Are they difficult to install?
 
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Old 05-14-24, 11:10 AM
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It's probably a seal has gone bad. If you aren't comfortable doing the overhaul/repair there are companies you can send them to to perform the work.
 
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Old 05-14-24, 01:33 PM
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I am comfortable doing the repair work. However, the "overhaul kits" seem pretty expensive - $50. If it is just a seal, most of those seem to be "O" rings. Can you suggest what needs to be replaced?
 
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Old 05-15-24, 02:37 AM
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You could tear it down and remove/match up the O rings for replacement.
 
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Old 05-15-24, 05:01 AM
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I think I will try that as I have quite an assortment of O rings. Thanks to all for your help and advice.
 
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Old 05-15-24, 09:54 AM
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I'd advise you to get a digital caliper (imperial/metric} to measure your o rings.

Sometimes it will just need a trigger kit when the trigger leaks air. Be sure you lube o-rings on reassembly.

In air tools there there are commonly either SAE, Metric, or JIS (Japanese) o-rings. You will need to do some very careful measuring if you aren't getting the OEM kits.
 
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Old 05-16-24, 07:52 AM
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Thanks for all your help.
 
 

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