I have a dx450 hilti nail gun, automatic cartridge feed won`t work. any ideas?

Needs good caps, need to hit the cap rim, leaving indentation on rim. Push the tool nozzle heavily against the work to fire.

AR you pushing down on the tip of the air gas tip. Are the gas cartridges old?

I would not try to do this job your self as if you manage to put it to back together and something's not right it will cause you injury. would take it to some who knows what they are doing with this model.

If you're getting an indent in the wood from the driver, the gun is working properly. If the gun isn't driving fasteners/nails it's because the nail isn't under the driver when it's activated. Several things could cause this: Having the wrong angle nails in your gun. There is something in the feed path of the nails preventing them from feeding fully into the nose piece. The feed shoe is jambed or feed shoe spring is broken.

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.

As a safety precaution, nailers have incorporated a safety foot that will prevent the gun from firing unless you push down hard. Some guns also have a system where the gun will not fire at all if there are no nails in the gun. To dry fire this type of gun you must pull back the pusher or open the side door. If nails do not feed properly, check for wrong nails, bent rails or weak pusher spring. If all is good with rails and pusher, suspect that the driver/piston is not at top of cylinder and lower part of driver blade is preventing nails from advancing. Remove airline and push the driver to top and retest. If driver is slipping down the cylinder under its own weight, replace oring. Good luck

Let's turn Doug's Question into John's question and see if we answer it :>D

https://www.askmehelpdesk.com/advice/t-374665.html

No Manual for it

https://www.manualslib.com/h/hilti+9017.html

It would appear that this was a departure for Hilti into the Nailer Market and it didn't last.

https://www.google.com/search?q=Hilti+RHN+9017+nails

..

Try http://www.us.hilti.com/fstore/holus/techlib/docs/instruction_manuals/dx/DX_450_Oper_Manual.pdf

The company below sells a full line of nails for your gun. The rn312 uses 17 degree nails and can be ordered from www.spotnails.com. Good luck with your nailing projects.

I suggest calling 1-800-879-8000 or going to the Hilti.com website and downloading a schematic for this tool. Let me know if you need more help