20 Most Recent Hitachi EC119SA Twin-Stack Air Compressor with Control Panel and Couplers - Page 5 Questions & Answers

This gun should be bump-fired only. Do not place the gun on the work and press trigger. Make sure that the safety spring is in place and has good tension. The spring helps to push the foot off the trigger so that it fires once. You could also adjust the screw that pushes on the firing valve. Turn in or out several turns till head of nail is correct when bump firing then lock the nut. The safety foot fits rather loose on the gun and should still work ok but can get so loose that it falls off the nose. Good luck

what gouge on the nails? and what pressure coming out of the compressor tank , and what type of wood and how thick is it?

You have broken or damaged o-ring(s) inside the gun. You can take it to a service center to get it rebuilt or do it yourself. I don't know which model you have but Hitachi doesn't make very many rebuild kits. You have to find a parts site like http://www.ereplacementparts.com or go through Hitachi to get the o-rings you need. I recommend if you replace one, replace all of them. If one went bad the others usually aren't far behind.

I would check for the proper nail guage and collation and if that is correct I would take it back for a replacement. But check the nails first.

The driver guide just sits in the bottom of the head, the bumper sits on top of it and holds it in place.

Fixing air nailers isn't hard, if you know how. Most of the problems with air leaks are due to broken, missing or out-of-place o-rings.

If you decide to do it yourself you can go to www.ereplacementparts.com and search on your model number to see a good breakdown of your gun to see what you are getting into and to figure out what o-rings you need. One word of caution, if you are going to replace any of the o-rings it is usually advisable to replace all of them and lube them up well with a very light grease before reassembly. Unfortunately Hitachi doesn't make rebuild kits so you have to order each part individually. The above website is pretty good on their parts prices but you can also use the site to get the part numbers you need and search the internet for better prices.

If you want a service center to fix it or if it's still under warranty, go to www.hitachipowertools.com and use the Service & Support tab to find a service center in your area.

DO NOT USE TOOL in this condition. You have a problem with a jammed safety or malfunctioning trigger. Did the safety get bent so that it will not reset or is the spring missing. I would look to see if the safety is holding up on the latch in the trigger area and go from there.

a manual would come with the tool when you bought it only way to tell is to take it apart and check if one is bad the others will soon follow use only a non detergent oil to lube it .If it happens to get a dent in the body it will cause the inner cylinder to bind and not be able to move and if that happens the tool is junk