Today I took mine apart. You really only have to turn the handle off. Had to put it in leather in the vise and use my 18-inch pliers, but it came off. My disc was as thin as paper, tho after studying it I believe the diameter is what wears down. I asked my wife for a penny and it dropped in there so perfect. I put it back together and it didn't work. I took it apart again and hand-sanded both faces off the penny, dropped it back in and put it together. Walla! works perfectly. Yes, I think if one puts some heavy oil in to seal the edges it might work for a few seconds. I think the air leaks around the edge when the disc is worn out, but obviously, the flat sides have to seal also. My handmade end on my concrete star bit works just great. Thanks for all the info here. Note: mine had two roll pins in stead of the dowel pins. Was easier to keep track of them.
Thanks. Learned a lot qatching your video. Gotta lube my hammer gun. I have an old CF air hammer kit. The guy with the grubby hands did a fine job. Thanks again. Have a fine week.
Cool video, I dig the music. Awfully nice of your mac guy to get you that part, my snap on guy won't warranty anything unless there's something in it for him...
I don't think you needed a new valve disk, from what I could see in the video it looked fine, I think yours was probably just dirty and sticky from old oil. A little bit of contamination on the surface of the valve holes or disk can cause it to not work and sticky old oil can cause it to get stuck in one side and not work. I'm glad you at lest fixed it though, instead of throwing it out and getting a new one like so many people do. But if you still have the original valve disk, I would recommend keeping it for when the phenolic replacement shatters.
I have a cheap one that blew air after 10 mins of use right out of the box. People say you just smack it on the concrete to get it working again. I haven't tried it yet though.
Just what happened to mine. Haven't used it for years. Started taking it apart and sat and scratched my head-on disassembly. I'm wondering if they just don't need a good cleaning. It worked the last time I used it with the ball joint fork on it. Will give it a try. I have made a tool out of my 5/8 inch star bit to drill holes in concrete when I discovered it wasn't working. It could be my welded and ground end isn't a tight fit too. Thanks for posting.
Just a tip, my MacTool guy also advised before doing anything to try and saturate that valve with wd40 (specifically) just spraying it down the barrel.
Hi there. I don't mean to criticize your video but I happen to be a tool tech for Snap On. Granted I'm watching a video so it might not be easy to see from my view point but I literally didn't see anything wrong with any parts. I did see how easy it was to unscrew the housing. Those need to be torqued onto the barrel at 250 ft pounds. That one was very loose and probably the reason it was blowing air. They will also blow air if there is no bit in the barrel. The set screw towards the front of the barrel is a hole drilled for manufacturing to connect air flow to the barrel to direct the piston. The set screws only purpose is to clog/close the hole. You replaced the thin disc (flutter disc) but it looked fine to me in the video. Make sure you get that housing torqued down tight or you will continue to have the same problem.
actually I had sent the chisel in for repair with the tool truck guy, they had sent it back saying it need piston, valve, and 2 other parts and did not repair it. I had been using it in an increasing state of blowing air for a long time till it had finally given up--the barrel was not loose, it was tight. It works fine after the teardown.
@@eldigitom9680 it did work fine after the repair. What I ment was that it will loosen back up if it was tightened by hand. If I tool is sent into a Snap On repair center we don't send it back without being repaired unless it's requested.
@@eldigitom9680 plus you have to think that the tech is recommending what should be replaced based on the fact that he/she needs to make sure that it will last through the repair warranty.
They don't need a tool in them. Mine works fine without, tho I may have more flow, but better with a tool. The "flutter" valve allows air to shuttler back and forth from the bottom to the top of the piston which is actually the hammer. If air gets around the edge of the disc it won't work. Thickness could have something to do with it as the disc needs to close off the ports in the side on a reciprocating basis, too thick or too thin might hinder passage. Mine was pretty thin. I love things that can be fixed by the average home DIY. It is a finely machined tool, if the finishes get damaged it is probably finished. - Kmondak - Industrial Designer -
Forgot to mention those round thick valve pieces that the disc go in are called valve halves. The disc is a flutter disc. A valve seat is a trigger part and a valve cap is in the PH3050 series of hammers.
@@eldigitom9680 Still a good video and very helpful. Terminology is always called different things to different people or areas of the country. Snap On has a "jig" that bolts to a vice that has 2 metal pins in it that fit in those non threaded holes on the barrel. That's how the hammer is held tight while we screw on the housing. The repair centers use to use another jig that slid over the housing and had a giant ratchet with a 3ft bar for leverage to tighten it. Lol. I believe all the repair centers have switched over to a drill powered torque multiplier. No more giant ratchet. Lol
Air motor oil is the best lubricant for pneumatic tools. If you read a Snap On tool owner's manual for any of their pneumatic tools it will tell you specifically to use air motor oil.
It is really strange. Is it possible to hold and rotate by hand? tried to break down my product with the same symptoms ... but it does not break down without professional tools The torque of the two combined parts is very strong.
Sorry, one purpose of making this video was to show how a non-pro could do this repair. I was guided and advised by my local MacTool guy. These guys (tool truck guys) have lots of smarts on pneumatic tool repair and most will readily share it.
@@eldigitom9680 thanks for the response. Having read the comments, now I question if I could find the problem. This belonged to my husband, who is deceased. 15 years later, I'm starting to go thru his tools and see what I can sale individually. Thanks for your time.
The only way a Mac dealer gets Snap On parts is if he orders them from snap on like any other person can. If it's not a Snap On part you are taking a risk of it not working.
@@outdoorsliving464 Well it wasn't working anyway so what exactly was there to lose. Kinda like whining about where someone buys oil after a rods knocking.
Ummm if you put your finger over the barrel (over not In) and create a seal over the hole it will engage. It needs the back pressure to reset the piston like it would if you had a die in it. I mean yeah maintenance is a really good thing to do. But if your just going off pulling the trigger saying it's broken try putting your finger over it and it should work
