I am tring to dowmlaod a user's manual for the nr 83a nail gun.

If it is this antique from the 1930s there is nothing available apart from images and references to it and a restoration video which might help.

https://www.google.com/search?q=Red+Devil+PDA+33c+stapler

..

All air tools need regular, sparing application of tool oil to maintain the seals and minimize moisture damage. With the tool disconnected from the air line, drip one or two drops of air tool oil -- NOT motor oil or any solvent -- into the air connector. Position the tool so the air connector is up, allowing the oil to run down into the tool.

yep they do that

extreme care needed to take the gun apart
especially if the rail of nails seperate in the tool

or drum type dispenser if fitted
choose your model see if the user manual helps in repairing

http://powertool.manualsonline.com/manuals/mfg/makita/makita_nail_gun_product_list.html

Hello, there. Attached is the PowerShot 5700 manual. We could only upload in JPEG format, but if you would like the PDF version, please email us at [email protected]. When you say "reassemble," do you mean the whole tool or the magazine part? We do not recommend disassembling the PowerShot 5700 completely.

Sounds like you have worn valves or damaged o-rings. Unfortunately Hitachi does not make a rebuild kit for your nail gun. If you go to www.ereplacementparts.com you can find an excellent breakdown of your tool and either order the parts you need there or use the part numbers to search the web for prices and availability. Your tool is on the old side and some parts are no longer available.

New user will jam the gun/ nails because gun was most likely not bump fired. Placing the gun then depressing trigger will usually cause double fire in the hands of new user. New user should practice on scrap lumber bump firing at many angles till they get the idea; or give them a training period with a nailer that has a single shot trigger (they may develop bad habits with single shot however).

the pin pushing your nails is loose and the guides are warned .
try to change the guides and you will see that this problem will will be gone .
one last thing , make sure the coils are in good shape as it may create some feeding problems and push 2 nails at once

yes my guns i rebuild once a year at least

Professional-grade varieties are automatic, and fire a nail directly upon pulling the trigger. A semi-automatic nail gun is more appropriate for beginners, since it requires a two step process: pull the trigger and then tap the barrel against the wood. This safety feature protects the user from accidentally firing a nail gun and injuring himself or others.

Professional-grade varieties are automatic, and fire a nail directly upon pulling the trigger. A semi-automatic nail gun is more appropriate for beginners, since it requires a two step process: pull the trigger and then tap the barrel against the wood. This safety feature protects the user from accidentally firing a nail gun and injuring himself or others.