After I shoot a nail it will not shoot any more . I did notice that the driver does not go all the way back up . I have a 8560

If your Senco coil nailer is shooting one nail followed by double nails, it could be due to several reasons:

1. Jammed Nail: The first nail may have gotten stuck or jammed in the coil, and when the driver blade pushes down, it forces two nails to come out. You can try removing the jammed nail and reloading the coil.
2. Depth Adjustment: The depth adjustment on your nailer may be set too deep, causing the driver blade to push down too far and shoot two nails instead of one. Try adjusting the depth control to a shallower setting.
3. Worn Parts: The driver blade or nose piece may be worn out, causing it to push down unevenly and shoot double nails. In this case, you may need to replace these parts.
4. Air Pressure: The air pressure on your compressor may be too high, causing the nailer to shoot double nails. Check the air pressure gauge and adjust it accordingly.

If you are unsure about how to troubleshoot or fix the issue, it's always best to consult the user manual or contact the manufacturer for assistance.

There should be a spring to return the driver. The mechanism needs oiling with pneumatic tool oil before every use. If it's not been oiled, it will stick.

-Make sure oil it. If so the Hummer is bend.


Good Luck


Mai

This response does not speak directly about your model of nailer, however addresses the problem of the nail supply. Generic nail suppliers are trying to sell us nails that are not exactly a perfect fit for our nailers. Nail guns are made for an exact angle and head of nail. Yet printed on the box of some of the case of nails, I see that the nails contained within will fit a variety of nailers with a variety of angles (+/- several degrees ).
You can choose a good fitting nail by taking a close look at your gun. Take a strip of nails and place them on the outside of the rails/magazine with the first nail perfectly aligned with the path of driver. With the first nail aligned with driver path, the angle of the rest of the strip of nails should align with the rails. If the angle is off slightly could be ok. Now align the strip of nails perfectly with the rails. Notice if the point of the nail or the head reaches the path of the driver blade first.
Recall that the nail should align perfectly with the path of the driver so that the driver blade will hit squarely on the head of the first nail over the shaft of the nail. If the head of the nails is forced away from the centerline of the path of the driver one way or the other, you will not get a solid square hit driving the nail true (think of hitting a nail with a large hand held hammer with an angular blow bending the nail). If the nail head is angled too far towards the path of the driver, the driver can hit two nails (the driver will hit the edge of the second nail of the strip).
The driver is designed so that it will not touch the second nail on the strip (assuming the nails fit perfectly). The driver blade is tapered at the bottom on the side that faces the nails. This taper allows the driver to hit the first nails then gently nudge the rest of the nails back into the rails slightly. To verify the shape of the driver blade, dry fire your gun into soft wood and examine the imprint. The imprint will not be round, but "D" shaped or flat on both sides like some Paslode framers. The flat side of the "D" will face towards the rails.
By using the information here, choose the nails that best fit (align) your gun (measure the angle with a protractor) . The lumber yards do not have a very good selection of brands. Try a professional fastener store that deals in nails and nail gun repair. Good luck

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

Gi?m gi? cung c?p l?m ??p

the first thing that i look at when a gun is double shooting is the nails. if i have the right nails then i check the driver( part of the gun that hits the nail) if the driver is fine( not bent or broken or worn) then your nose( chamber that holds the nail right before being shot out) is worn or broken. either way to answer your question , no , double shooting is not only dangerous but a complete waste of time, ps rate , tks

Are you using full round head nails?

The hissing indicates your O-rings are worn out and need to be replaced. This is not covered by warrenty and is common for all nail guns. Lots of kits are available on Ebay or your local Hitachi service center should stock them.

Hope this helps,

Cheers

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.

The problem that you describe is caused when the driver is not returning all the way back up to the top of the cylinder not allowing the nails to enter into position . You may have one of several problems including worn piston oring, bent driver, worn check valve, worn lower bumper, or low air pressure. Simple test is to manually push the driver blade back to top using a thin piece of metal that fits into bottom of gun. Be sure to disconnect from air supply when doing this. Good Luck