Question about Stanley Bostitch BT200K

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Roofing nail gun will fire but the plunger only goes out about 1/4 inch, just enough to push the nail a little. plunger stays in that position unless you touch it lightly, then it retracks.

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Look for a jammed nail in the nose area, UNPLUG AIR FIRST. look for a bent driver and lastly when was the last time tool was serviced, you possibly have a dry o ring. Let me know

Posted on Sep 12, 2010

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Posted on Jan 02, 2017

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1 Answer

Nailer wont advance the nails then it shoots blank


Try ez test to check for proper operation. Remove nails and air supply, point nose of gun up then down again. The driver should not move from the top of cylinder position. If driver is moving up then down replace the driver oring. If driver oring seems ok then connect air supply and bump fire the nailer without nails against soft wood and door open so that you can see the driver and feeder moving. Bump fire the gun and make sure that the driver is moving all the way back up to top of cylinder and the feeder is moving rapidly back and forward. If movement seems ok then hold the nose down on soft wood and depress and hold the trigger. This will fire the gun but driver will stay at the bottom position and not return until you release the trigger or lift the gun. When holding the gun with the driver down position, no air should leak out the top or bottom of the gun. If air leaks out bottom, replace lower bumper, if air leaks out the top replace the upper bumper. Good luck

Mar 19, 2015 | Porter Cable Coil Roofing Nailer

1 Answer

I have a hitachi nv45...aand dropped it of the roof.It broke the pushing lever (part #888-883)I replaced it and now the gun isnt firing properly.The guns rapid fire doesnt work.You have to push the trigger...


Sometimes after a good knock on the side the cylinder will bind and not work correctly. Remove the head and make sure that the cylinder moves easily up and down. If cylinder is ok, then most likely the adjustment on the pushing lever set too low. New pushing lever does not come with the adjustment screw and lock nut. Adjust the screw up or down for best firing position. If the adjustment screw is in place and adjusted, make sure that the plunger is not sticking within the valve(plunger makes contact with the adjustment screw on the pushing lever). With pushing lever removed, the plunger should move easily in and out. Good luck

Oct 13, 2014 | Air Tools & Compressors

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Nv45ab won't advance nails


The allen screw/s that you mention are there to plug holes where automatic equipment would normally connect (such as automatic nailing machines) . This is only a plug and should not be driven in too far. I have also seen allen screws installed in the head to repair small crack/s.

Jan 22, 2013 | Hitachi Air Tools & Compressors

1 Answer

Nailer will shoot a nail, but will not foward the next nail. Gun is new maybe 15 lbs of nails or so.


If the nail will not advance, easy test will determine problem. Open door and remove the nails. Lightly tap the nose of the gun against coiled rubber hose or soft wood with door open. If the driver falls to bottom, the piston oring needs to be replaced. The driver should stay at top of cylinder. Next pull back the feeder to rear position and check for tension. The feeder should spring back towards you when you push. Finally, the check paws on the door should return to extended positon when you push on them. Replace springs as needed. Connect air to gun and rapidly bump fire the gun against rubber. The feeder should move back and forward just as quickly as the driver moves. Good luck

Aug 25, 2011 | Hitachi NV45AB2 78Inch to 134Inch Roofing...

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...

1 Answer

I have the 2 1/2 Hitachi for nailing siding. The nail gun had not been used for a couple of years, but now will only drive the nail half way in. Sounds like an air leak when driving the nail. I have...


Remove the nails and air supply. With side door open notice position of driver. Driver should be at top position with tip not visible. If driver is down and it moves within cylinder when you tilt nose up then down again, time to replace orings. If driver is down, it should extend past the nose about 1/4 inch (if driver is broken at the tip the end will look rough and nail will not drive in all the way). If driver extends past the nose more than 1/4 inch then lower bumper may be breaking up /cracked. Easy test for proper function. With nails removed and side door open, connect air to gun and dry fire gun against hard rubber or old coiled air-hose (with air connected and trigger depressed, no air should leak from trigger area, if air leaks when trigger is depressed, look for fault at trigger pin). Feeder should move back then forward in quick motion almost matching speed of driver and driver should not creep down between shots. No air should leak from nose of the gun (push nose against hard rubber and depress trigger and hold in this position, driver should stay down with very little or no air leaking out of nose, when you release trigger, driver will return). If air leaks out of nose while holding in this position, replace lower bumper. If a quantity of air leaks from valve in front of trigger, cylinder orings may need replacing or outer part of cylinder has fine scratches (remove scratches with 400 grit paper). Parts are available at www.toolpartsdirect.com. Good lucki

Apr 16, 2011 | Nailers Hitachi Nv83a2 3 14" Coil Framing...

2 Answers

Brad nail only goes 1/2" into wood. there is no


You might get better penetration if you use your other hand to press the gun down firmly onto the surface before you pull the trigger. (This will help if the gun tends to jump a little when you fire it.) Or, if the surface you are firing into might not be rigid enough (like a thin board that is not supported) - in that case you might improve the penetration by better supporting the surface you are nailing into, perhaps by placing it on the floor. On the other hand, this may simply be a case that the gun is not powerful enough to do what you want it to do. To test that theory, try it into a piece of soft wood (like a 2X4) or find a soft thick material as a first layer over the wood you are using. Perhaps you can use shorter nails - thin brads in wood don't gain much strength beyond 1/2 inch penetration anyway. The length of the brad only needs to be about 1/2 inch longer than the thickness of the first layer of material. I hope this helps, good luck Al K

Feb 24, 2011 | Arrow ET200 Electric Brad Nail Gun

1 Answer

When i squeeze the trigger the gun goes off but no nail comes out? i have already bought the repair kit and have been working on this gun all day


Here are a few tests for you to try. You will need a piece of rubber or coiled up old hose.
First open side door and remove nails. Tilt gun head down then up again to check if piston is loose in the cylinder. The piston should stay in top position. If piston drops to bottom of cylinder replace piston oring or apply some coils of teflon tape under oring to expand oring slightly untill piston stays at top but still can be pushed down cylinder. If piston stays at top connect air to gun and with side door open contact gun to rubber firing gun noticing the feeder movement. With very rapid firing of the gun, the feeder should move back and fourth just as fast as the driver moves. If the feeder seems to move slower than the driver moves then check/replace spring in feeder. If spring seems strong enough in your opinion then problem is restriction in the air supply to feeder. You will need to remove the two 6m allen screws at front of gun and split gun apart to check restriction at the oring sealing these two parts. Sometimes debris traped at oring (white oring) will restrict air to feeder. Good luck.

Jan 08, 2011 | Stanley Factory Reconditioned Bostitch...

1 Answer

Hello 2 of my bostich rn-46 nail guns will not fire in the morning after working the day before. What causes this. thanks mike L.


There can be a number of reasons for this. A little more info is needed though (See below). This symptom can be due to a lack of lubrication, the plunger being stuck and not in the fully retracted position, etc.

1) Can you hear any air leaking anywhere?
2) Can you see the location of the plunger (drive pin)?
3) Is there any reaction to the trigger? WIth the trigger held, and hitting the roof, is there any air release or anything at all?

Thanks,
Dan

Sep 26, 2010 | Stanley Factory Reconditioned Bostitch...

2 Answers

Nail gun not putting nail in all the way


yes ,should be on head of gun,if not try turning air preasure up.

Aug 21, 2009 | Stanley Factory Reconditioned Bostitch...

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