Do i need to buy piston driver assembly or can i by just the driver blade

If air is coming out from the nose tip but the nailer is not firing any nails, it could indicate a problem with the driver blade or piston assembly. Check if the driver blade moves freely and is not damaged. Make sure the piston assembly is properly aligned and lubricated. Also, check the nail magazine to ensure that it is properly loaded and the nails are the correct size for the nailer. If the problem persists, it may be necessary to take the nailer to a professional for repair.

It appears that there is a small o ring that has missed you attention in reassembly and has fallen out of the groove. re do the job paying to gaskets and o rings.

That was basically the same tool (with a few small differences) as the Spotnails MNS5. On the Spotnails version it uses a round, thick piece of plastic with a D shaped hole for the driver guide. There was no driver blade seal. If that is what you need I may have a few left in stock. We are Twin City Supply in Loves Park, Illinois.

Usually there are four things that affect the driver not reaching the top of cylinder. Piston oring too tight or too loose, exhaust air is restricted at top of gun , check valve oring is missing, or air leaking down thru blade seal. Assuming that the piston oring is ok and exhaust is not restricted, make sure that oring # 092235 is in place covering the small holes on the outer lower portion of the cylinder. this is the check valve that causes piston to come up. If, however, too much air leaks down past the blade seal, the driver will not make it to the top. Blade seal is a metal washer with slit just large enough to pass the driver blade. If worn, just make a washer out of tire tube and make a small cut with sharp blade just large enough to pass the driver blade. Make the washer larger than the metal washer and just place it on top of the metal washer. Put back together and nail away. Good luck

you will probably have to heat it up. they use a loctite on the threads. Are there replacement parts? Usually they sell the piston/driver as an assembly.

The problem is wear on the sides of the driver blade. With the constant up/down movement of the driver against either side of the nose plate, it eventually narrows enough to allow part of the fine wire 71 series staple to find it's way between the driver blade and the inside wall of the nose plate. A new driver blade cures this completely. Rainco tackers have become a bit rare but the good news is, they're actually manufactured by Fasco and the Fasco driver fits into the Rainco piston by the removal of a single pin to allow the old blade out, replace with the new Fasco blade, re-insert the pin into the piston, then re-assemble the gun and you're away.

could be several problems, are you using the right guage nails, is there a nail jammed in the nose assembly, is the driver bent or broken, I would look for a jammed nail first and if none then I would remove the cap and check the condition of the cylinder and piston. they have a bad habit of breaking the driver blade loose from the piston

Most common cause for driver not returning is a worn or missing blade seal which is a washer with a slot found under lower bumper. Remove head and cylinder. Check that driver is not bent and slides snuggly thru slot in washer. If washer seems ok then check for missing check seal oring found at lower end of cylinder. Clean the holes under check seal. Finally check oring at driver piston. Oring should just hold piston in place without sliding down cylinder. The driver should not be too tight nor too loose. Re-assemble using silicone paste on all orings (small tube of silicone available at Lowes plumbing department, used to lube faucet orings). Good luck and post again if you have other questions.

wiper gears may be broken, got to junk yard and buy motor and gear assembly for windshield wipers, should only take an hour to change out.

Your driver blade/piston may need machining. Remove the to cap of the tool and take out the blade/piston. Using a bench grinder square up the blade, then put tool back together. Then test fire tool. Good luck!!!!