My max cn 450r roofing nailer wont feed the nails up.driver is driving nail when nail is in position.cant seem to keep the coil nail feeding yet everything seems to be working.what shoud i do.than clay smith
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Re: max roofing nailer
Max nailers are very good quality and parts are not expensive. Parts and parts list at www.toolpartsdirect.com. Check the following to repair not feeding problem.
Check paw in the door should have a light spring action. Feed paw should have a medium spring action. You may have to pull the feed piston back and hold to check feed paw spring action. Feed piston should have heavy spring action. If springs seem ok then remove feed piston and replace two orings. If the feed piston spring is broken replace with correct part. Make sure that the ports that direct air to feed piston are not blocked with bits of rubber or dirt. Sometimes parts of the bumper will break off and spread thru-out the gun. Good Luck and enjoy. (parts not expensive)
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Without knowing your model number here are some things to check, in order of difficulty: 1. First make sure you're using the proper nails for your gun. If your gun isn't specifically listed on the box of nails as compatable make sure they are seating in your gun properly. Some brands of angled nails are a couple degrees off from others and won't work in competetor's guns. 2. Check the entire feed path of the nails in the magazine all the way up to where the driver catches the next nail. Sometimes dirt builds up in the track or there could be a peice of nail stuck in there preventing the nails from getting under the driver. Also the spring on the feed shoe should have strong pressure on the shoe all the way up to the head and the shoe has to ride freely in the magazine. 3. If the gun is making holes in the wood the driver isn't broke but it must be straight and true and the tip square. If not it will miss or slip off the nail before driving it. The only way to check the driver is to remove the head on the gun and take the driver out. The piston & driver should travel from the top to the bottom of the cylinder without binding anywhere. Correct any problems you find or replace any damaged parts and your gun should work.
Could be that the driver is not returning to top of the cylinder. Easy test, when the gun miss fires, remove air line, with thin metal, insert thru nose and push driver up. Retest gun. If driver was down a bit then nails will not feed. Remove head and check that driver oring is making good seal, lubed, and is not too tight or bent. Also check that lower bumper is not cracked or missing pieces. Replace parts as needed. If driver was all the way up, clean rails and pusher assembly with wd40 and follow with good cleaning with air. If pusher and rails working properly, must be problem with bad batch of nails, slightly thicker or wider head not allowing nail to easily slide. Open nose latch and check that nails slide thru easily.
Hello. To adjust the depth of the nail you have to increase or decrease the air pressure from the compressor. Look at the compressor and you will see a knob or dial that you can turn to increase or decrease the air pressure. Do this adjustment in small increments testing the nailer by driving nails into a scrap of the same material you will be driving the nails into on the actual job. Increasing the pressure will drive the nail deeper and decreasing the pressure will drive the nail less deep. Joe
I just finished 800 square feet of oak flooring with this nailer. You might have to increase the psi at the gun and make sure it gets a good square firm hit to set the nail. You can swing and hit the thing pretty hard, I hit it hard to set warped boards in place. I used 120 psi for best results, I tried 90 psi but had more misfires. The nail head only needs to set in far enough so the head is touching the tongue and so the next board will fit. The nail won't be buried into the tongue like you might think. If the occasional nail protrudes from the board you can use a nail set to drive the nail the rest of the way in, but I found that most of the nails didn't want to set by hand. I either clipped off the head with side cutters and folded over the remaining tab or did my best to set the nail if it wasn't long enough to clip. If it bends over really ugly, just carve a little wood from the groove lands on the next board to clear the nail stub. Removing the nails is difficult, it's best to let them be rather than risk damaging the flooring. Also, don't let the gun get down to the last nail. Sometimes if you try to fire the last nail on a strip it will twist and damage the flooring. Always keep a few nails in the gun just to be safe. Hope this helps.