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My mastercraft air powered coil roofing nailer won't move the next nail into the chamber to be fired.

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Posted on Jan 02, 2017

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  • 5603 Answers

SOURCE: I have a Porter Cable

This sounds like it might be a problem with the nails themselves. Have you tried another brand? If the place you got the nailer is nearby, ask them about the problem. Also look if the carrier strip MIGHT not be clearing and preventing the advancement of the nails. I would also try a light spray on the coil of CRC226 available at Home Depot in the electrical dept.

Posted on Oct 24, 2010

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rowdy45176
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SOURCE: Bostitch RN46-1 roof nailer won't

check the height of the magazine, but I think that you have a problem with the feed piston or there is a spring on the feed pawl that might be broke. Unload the nails and dry fire the tool with the door open observing the piston movement. It should "SNAP" back and forth if it does unplug the air and check to see if the spring that applies pressure to the pawl is broken or missing. I am going to guess the piston. If this tool has not been serviced in a while the asphalt tends to jam up the mechanisms. Let me know if you need more assistance.

Posted on Jun 12, 2011

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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

My makita an451 roof nailer keeps shooting 2 nails I've tried 2 different brands of nails


Nailers that use strips of nails (one nail directly behind the other) will sometimes drive two nails at once and is caused by damage to the driver. The nails are so close together that the driver will hit the first and part of the second nail head. Coil nailers, as your an451, use nails seperated by welded wire making it very difficult the the driver to hit the second nail. Usually when a coil nailer shoots two nails, it is acutally the trigger valve that acutates twice (two very rapid fires). Two very rapid fires is caused by faulty trigger valve. I have seen a roofing coil nailer fire one nail and a second nail drops out of the gun. Caused by weak / malfunction of nail feeder or wire used to weld nails together is too thick.

Sep 17, 2011 | Makita Roofing Coil Nailer AN451

1 Answer

Bostitch RN46-1 roof nailer won't advance nails into the piston chamber. After loading the nail coil, the first nail fires fine, but the next won't advance. Please help. Thanks!


check the height of the magazine, but I think that you have a problem with the feed piston or there is a spring on the feed pawl that might be broke. Unload the nails and dry fire the tool with the door open observing the piston movement. It should "SNAP" back and forth if it does unplug the air and check to see if the spring that applies pressure to the pawl is broken or missing. I am going to guess the piston. If this tool has not been serviced in a while the asphalt tends to jam up the mechanisms. Let me know if you need more assistance.

Jun 12, 2011 | Tools & Hardware - Others

1 Answer

When firing nailer first nail shoots good but next nails head will get stuck between the push rod chamber. push doesnt seem to return fully top when nail is cycled.


Try oiling the tool first. Remove the nails, squirt a decent amount of air tool oil in the stem where the air hose coupler connects, and fire the tool a dozen times or so. Then put in the nails and test. If it still hangs up then it will need the o-rings replaced.

Jun 11, 2011 | Porter Cable Coil Roofing Nailer

1 Answer

It will shoot first nail but won't feed the next nail


could be a few problems, the feed piston might be sluggish, the spring might be missing off the feed pawl, the collation of the nails or a bad coil of nails, the driver might not be retracting fully. Now for the way to check some of these. First look at the coil of nails and the adjustment on the magazine, the nails should pull freely off the coil. Next remove all the nails and using a block of wood "dry FIRE" the tool with the feed door open to check the movement of the feed piston, it should snap back and forth and if it doesn't that would probably be your problem, could be dirty/worn orings or debris in the air chamber. UNPLUG air hose and check for the finger spring that holds the feed pawl tight and check the pawls for wear and asphalt not allowing it to catch the nails. Lastly fire the tool and check the piston, did it retract fully allowing the next nail to advance? if not you would need to probably replace the o rings in this tool. Let me know if you need more assistance. And if I have helped you would you please vote accordingly, thanks

Mar 16, 2011 | Hitachi NV45AB2 Roofing Coil Nailer

1 Answer

Bostitch Rn46-1 Nail feed keeps coming dislodged when firing gun


The feeder will dislodge if the feed paw spring is weak or missing. Replace with new spring to keep the feeder paw in place. Visual test with good feed spring. Remove nails and open side door. Fire gun rapidly against hard rubber or coiled air hose. The feeder should move back and fourth in time with the piston/driver. If the feeder seems to move in slow motion compared to the driver, check feeder piston orings and feeder piston spring. If both feeder piston orings and spring are in good condition, then check air passage to feeder piston chamber for obstruction. Sometimes debris will lodge in white oring where body mates to nose of gun. Good luck

Jan 14, 2011 | Stanley Bostitch Rn461 Gun Coil Roofing...

2 Answers

Having problems with the gun not pulling the next nail, the thickness of the wire between nails sticking in gun and then double shooting. using gun in new england, its cold we warm it first. any...


Nail feeder on this gun is both air and spring controlled. Air pressure retracts the feeder and a strong spring pushes the feeder back to front. Remove nails and leave side door open. Dry fire gun very rapidly against thick rubber pad and watch the feeder retract and return. It should move very rapidly all the way back and front again. If it appears to move slower than piston is moving then follow next step. Pull the feeder back manually with tip of screwdriver. It should be very hard to overcome spring. If spring feels strong then suspect feedpiston oring or air supply to feedpiston chamber is restricted with debris from inside of the gun housing or air is leaking where body of gun mates with lower nose. There is a small white oring that seals between body and nose base. Sometimes this oring will be over-compressed thus restricting air flow into feed chamber. Remove two allen screws at front of base to split body from base and reveal this oring. Parts are available at www.toolpartsdirect.com. Good holidays

Dec 25, 2010 | Stanley Bostitch Rn461 Gun Coil Roofing...

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...

1 Answer

Fires the first nail and will not fire the second. But makes the hit on the wood, so I know it shoots but it's the nail that will not move into the chamber to go next. Oiled the parts and still the same...


Either the nail thingy that pushes the nails through is worn, broke, or shot, or you have the wrong nails in there and it is not grabbing them as it should, I think the part is broken on the inside, can't really tell without seeing it, but if it spins free, you need to check it out. Might be able to weld it. Or just replace it. Hope this helps.

Sep 17, 2010 | Hitachi Nv45ab2(s) Coil Roofing Nailer

3 Answers

My bostitch rn46 seems to double or triple shoot nails frequently. Am I not using the tool properly or could there be a mechanical problem with the tool?


if u are right nails for gun,then make sure when u put coil in and feed in front of firing pin the nails are straight with pin and connecting wires are not bent causing nails to fall out of alingnment.

Oct 02, 2009 | Stanley Factory Reconditioned Bostitch...

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