How to remove brads jammed in the nailer

There is a dial located by the business end of the Brad that adjusts the depth it fires. Also make sure you air pressure ( written on the stapler ) is set to level issued by the manufacturer. It'll say something like max pressure 90 psi. That would mean you will need to adjust the regulator pressure on your compressor to no more then 90 psi or to what ever number that is written on that sticker. Use a test piece of wood and turn the pressure down if you have no luck until you get the desired results.

Have you inserted the correct Brad Nails? What is the code of brads you have inserted? Is the tool jammed?

Solent Products Air Nailing and Stapling Supplies

Per your addendum I would have first told you to check that you are using the proper guage nails. Second you should make sure you are loading the nails in the lowest channel in the magazine so they are at the bottom of the magazine. If you load them into the top of the magazine they have more time to go off course before they get into the wood.

Just as long as their the same gauge

Increase air pressure.... you're way too low......

usually about 90PSI will work well. anything more and you might have problems. It generally states this on the magazine.

first make sure that you are using the right guage nails and if so I would return it to the place of purchase for replacement., the blowing of air could indicate a jammed nail in the track, look for that first and make sure the driver is retracting fully.

check your hex wrenches they could be standard when they need to be metric.

It sound to me that the 1 5/8 brads are not 18 guage but probably 16 guage and they will not work. Double check them first before going any further. You can usually lay them next to the smaller ones that work and see the size difference, if not let me know and I will dig deeper.

18 guage nailer has a very thin driver and plastic cylinder which bends or breaks easily. Remove the head noting all the parts in the head and remove the piston which should be at the top of the cylinder. Check for broken or bent shaft. Most likely broken and jammed in cylinder. Parts are not expensive. Check WWW.toolpartsdirect.com for diagram and parts