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PC FN250A nail gun won't shoot nails. It sounds like it's firing and leaves a mark but no nail gets seated. The nose cushion is very worn and needs replacing but would that cause this?

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 104 Answers

SOURCE: paslode im350

Stuart - this sounds like an air problem - you should perform the following test. With the air nailer close to the compressor you must monitor the airpressure after the gun fires. it sounds like the air is not gettting through diapram fast enough or there is a blockage in line. Blockage in line is not suspected for the following reason . It sounds like the air hose is holding enough air to fire 2-4 nails and then you must wait for the line to fill up again and then it fires ok. The pressure regulator out to the line controls this and they do fail. try this test and report back to me - I know I can solve this for you as I have extensive background in compressor and the like.

Posted on Oct 22, 2008

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  • 1388 Answers

SOURCE: bostich gun problem

If the piston/driver is broken, the gun will fire however nailing will not take place because the piston will jam in the cylinder. Sometimes the cylinder will also crack when the driver goes. If the piston is not broken but stays down, then check the cylinder check valve, worn lower bumper, bent driver or cracked cylinder. 18 guage nailer has a very thin driver which will easily bend or break. Parts however are not expensive.

Posted on Nov 25, 2008

  • 24 Answers

SOURCE: Makita AF503 Brad Nailer won't fire nail

Take head off of tool. Clean and lube orings on the head valve . Do not use wd40 use air nailer oil.

Posted on Apr 14, 2009

comax
  • 154 Answers

SOURCE: Mastercraft Brad nailer piston always fires

The dial on the top of the gun is most likely the depth adjustment for the nails, this should solve the driver damaging the work piece. Make sure the nails are the correct guage for the nailer you have.

Posted on Apr 14, 2009

Editor925
  • 285 Answers

SOURCE: How do you safely remove jammed nail gun?

Not sure exactly what Bostitch framer model you have, but if it is powered by compressed air, as long as you remove the air hose from the nail gun, there should be no risk of the nail gun firing while you remove the jammed nail. There should be a way to access the driver area from the top of the nail gun, even via a latch or a couple screws. Remove the top part of the driver area and that should give you access to the jammed nail, which you can remove. Use long nose pliers or something similar if the nails are really stuck.

Posted on May 31, 2009

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1 Answer

My 601 won't shoot any spikes it just leaves a 1/4 '' indent were nail should be?


If you're getting an indent in the wood from the driver, the gun is working properly. If the gun isn't driving fasteners/nails it's because the nail isn't under the driver when it's activated. Several things could cause this: Having the wrong angle nails in your gun. There is something in the feed path of the nails preventing them from feeding fully into the nose piece. The feed shoe is jambed or feed shoe spring is broken.

Feb 18, 2013 | Senco & Frame Pro 601 Framing Nailer

1 Answer

Miss fires and wont sink nails depth set deep and pressure over 120 psi


If no air is leaking from gun, miss-fire is usually caused by worn or too tight piston oring or lack of lubrication. Easy test. Disconnect airline, remove nails, point nose of gun up then down. Driver should stay in uppermost position. If driver moves up then down within gun replace piston oring and retest. Set pressure to about 100psi. Good luck with repair.

Oct 14, 2012 | Porter Cable Coil Roofing Nailer

1 Answer

Hitachi NR83AA shoots two nails on one pull of the trigger?


Best practice is to bump fire the gun to prevent double fire. Do not place the gun on the work and pull the trigger. This takes practice while using at an angle. Works better if the nose piece has rather sharp points to help nose to stay in postion while you bump. With trigger depressed, practice without nails bumping/hitting wood at different angles untill you can bump hit at the spot that you need the fastener. If the gun double fires while bump-firing, most likely all the safety/trip parts are worn/loose. Not expensive to replace. Good luck.

Jul 05, 2012 | Air Tools & Compressors

1 Answer

Paslode 900600 Trim nailer not sinking nails


The firing pin can be completed or part of it crooked worn and can have a little burr on its way and stuck in the cylinder somewhere o-rings worn and hardened, have a tilting piston on the firing pin somewhere in the cilinder

Jul 27, 2017 | Air Tools & Compressors

1 Answer

I'm trying to figure out why my PC FN250A won't fire nails. I don't see one jammed. What else can I try?


If the driver is not returning to top of cylinder, the nails will not feed into position. Remove nails from the gun and Insert thin tool into nose to verify that the driver is all the way up. If the driver is already at the top of the cylinder, then nails are not feeding correctly (check for debris in rails or for proper nails). If the driver was not all the way up, check for bent driver blade, loose or too tight piston ring or restriction in the headvalve (upper bumper cracked). Good luck

Jan 18, 2012 | Tools & Hardware - Others

1 Answer

DOESN'T FEED,IT MIGHT MISS SHOOT A TIME OR TWO THEN GET A NAIL THEN NOT FEED.I'M SHOOTING A 1.5"TECO NAIL. ANOTHER GUN DOESN'T SHOOT EVERY TIME LIKE THE DEPRESSOR ISN'T LETTING THE...


Usually miss feed happens when the driver does not return to top position not allowing the nails to feed into position. Easy to check, point nose of nailer up then down again to see if the driver is loose in the cylinder. If loose, the driver will be in the down position when the side door is opened. If driver is down, replace driver oring. If driver oring is good, look for spring tension on feeder and check feeder spring on the door side. If piston oring good and feeders have good spring tension, suspect lower bumper cracked(remove head and piston to check bumper).
On gun with depressor (safty foot) not actuating trigger, look for worn trigger (trigger inner lever could be worn) or loose or worn firing pin in the trigger valve above the trigger(valve # tva6). Replace as needed. To check for proper gun action, remove the nails, remove the 3mm roll pin holding trigger and dry fire the gun by depressing the tigger pin. Good luck

Sep 21, 2011 | Stanley Bostitch Coil Framing Nailer

1 Answer

Porter Cable FN250c wont shoot with every trigger pull. sometimes it shoots correctly (10% of the time), other times it just pops (no nail) and other times it shoots two nails at once. Also when it...


Worn trigger and or worn firing valve. Remove the trigger and look for wear on contact surfaces (worn pin that holds trigger, worn inner lever inside trigger, worn or loose firing pin in valve ). Easy test for worn trigger. Remove the nails, remove trigger, fire the gun against wood with finger to test for proper action. If it works better without trigger, consider replacing trigger with new (I would also order the oring repair kit that includes the firing valve )

Jul 26, 2011 | Porter Cable-Cable FN250C 1-inch...

1 Answer

Gun will not shoot nails completely;no matter what wood,thickness,etc.they drive all but 1/2"


May be due to broken tip. Easy to check. Remove nails and leave door open. With door open, lightly tap the nose of the gun against coiled rubber hose or soft wood. The driver should stay at top position. If driver falls to bottom of the cylinder, replace piston oring. Now press nose of the gun against old coiled up air hose or soft wood and squeeze and hold trigger. The gun will fire and the driver should stay in the down position untill you release the trigger (if not single fire trigger, if single fire trigger remove trigger and press the trigger pin with finger). While the driver is down, make sure that the tip extends past the nose about 1/4 inch (if air leaks past the nose in this position, replace lower bumper). If the driver does not extend past the nose, replace driver. Good luck

Jun 24, 2011 | Stanley Bostitch N75c1 Coil Sheathing...

2 Answers

When I go to shoot the nail, it won't sink the nail all the way. The head of the nail is still an inch or so out of the lumber. Also, when I push the safety against the nail, sometimes it won't shoot. I...


Remove the nails and dry fire the gun against thick rubber or coiled hose to absorb impact. Driver should be visable about 1/4 inch past the nose. If not visable then tip of driver may have been broken off. If driver length ok then time to reseal gun to regain full power. To solve irregular firing, replace the trigger valve (usually part# TVA6 ) and examing the trigger itself for worn contact surface or worn retainer roll pin. Parts are available at www.toolpartsdirect.com. Good holidays

Dec 28, 2010 | Stanley Bostitch F28WWMCN 28° Industrial...

1 Answer

Shoots one nail then it stops it fires but no nail


This is a very popular gun, very light and powerful. Skipping nails is not a common problem. Here are a few things to check that would cause the issue. (First remove air hose and nails.) Worn piston oring (piston will be in the down position). Open side door and check that piston is at top. If oring ok, check feed spring under feeder claw. If spring is in place, push feeder in manually. It should be very difficult to move feeder shaft. If it moves easily then spring inside feeder chamber is broken. If ok, connect air to gun, leaving side door open (nails removed) and bump fire gun against hard rubber (or coiled rubber hose ) very rapidly. While bump firing rapidly, look at feeder moving back and forward. It should be moving very quickly keeping up with speed of driver. If it appears to be moving slowly compared to driver there is an air feed restriction to feeder chamber. Check for debris in small air passage to chamber. Remove two allen screws holding nose of gun to body and examine the small white teflon oring between nose and body(part #149885). Sometimes this oring traps dirt and grime or just simply gets pressed so tightly that center hole is restricted. You must use the correct teflon oring here because the nose and body fit so tightly together that a rubber oring will close air path. Good luck.

Sep 18, 2010 | Stanley Factory Reconditioned Bostitch...

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