Question about Stanley Bostitch SB1850BN 18Gauge Brad Nailer

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Sounds like air leaking inside won't pressure up & shoot

Internal air leak when you plug it in & won't pressure up enough to shoot nail

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It probably needs servicing. Strip gun & clean it may have water inside from compressor and/or may have too much oil inside (may have no oil at all and be seizing up). Clean & check O rings. ( I replace O rings during a service). When rebuilding apply a little Teflon grease to the O rings and smear a little inside the sleeve, do not add oil at this time. Connect to airline and check for correct operation. If all OK add a couple of drops of oil down air intake before starting work as normal.

Posted on Mar 28, 2014

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1 Answer

Internal air leak won't pressure up


Sounds like the trigger valve is bad. If the air is leaking out of the trigger you can buy a kit and replace it. Try eReplacementParts com or your local Bostitch service store. It's really simple to change, check out this site for step by step, How To Replace The Trigger Valve On Bostich Nail Gun How To Guides DIY... OEM Replacement Parts DIY Repair

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1 Answer

Leaking air out yhe head of the gun won't shoot a nail


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Gun has no air leaks,when you shoot it it sounds like it is nailing but no nail comes out. It is a framing gun,4 yrs. old or so.


hello hunt..... oil it and also check to be sure that the nails you are using are the correct ones for that gun, and that the air pressure is set high enough.

Finally disconnect it from the air supply and manually raise and lower the "hammer" to properly lube it. Joe

Thanks for choosing Fixya!

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1 Answer

I have air leaking out the nose of my nailer. When I removed the nose the upper chamber holds air pressure. After I put the nose back on it will hold air pressure, but after I shoot a nail it will start...


sounds like the packing is shot. you need to oil it 2 times a day if its a constant use tool, drain your compressor everyday if its below temps do it twice a day. before removing the packing try putting lots of oil 10 drops into the nailer it might just be **** caught in it but **** can ruin the packing.

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1 Answer

Leaks air around the trigger. Doesn't shoot the nails at 100psi, I think it is a F28WW Bostitch shoots the 2'' and 31/2'' nails


sounds like the trigger valve has a broken o ring and would need replaced. you can go to Bostitch.com and order one for it, they are not that hard to install.

Jan 16, 2010 | Stanley Air Tools & Compressors

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