Muzz Posted March 9, 2014 Share Posted March 9, 2014 Having problems with my H&S Evolution, paint appears to be getting down the outside of the nozzle inside the air cap. I think the white ceramic O ring at the end of the nozzle may be damaged. Has anyone experienced this problem before or know if the washer is replaceable? The nozzle itself is relatively new and don't want to buy a new one if it just needs a new O ring! Link to comment Share on other sites More sharing options...
little-cars Posted March 9, 2014 Share Posted March 9, 2014 If it's coming from the front of the nozzle, it could be damaged. Are you getting any air bubbling back into the paint cup? Also are you using the rught air cap for the nozzle ? New o rings for the nozzle are £5 for 3 from memory, but you are better buying the set for the while brush for £7.50 which has two o rings for the nozzle and air cap. Paul Link to comment Share on other sites More sharing options...
Muzz Posted March 9, 2014 Author Share Posted March 9, 2014 I was having the problem and have just changed the air cap, was pretty sure I had the right size air cap. Sprayed with it today for the first time and there was a lot of bubbles in the cup as if the nozzle was blocked but some paint was coming out. Wasn't getting the bubbles in the cup before, am I right in saying the same air cap fits 0.15 and 0.2? Thanks for the info on the O rings. Link to comment Share on other sites More sharing options...
little-cars Posted March 9, 2014 Share Posted March 9, 2014 Hi, Bubbles in the cup points to a problem with the nozzle. Could be several thing... The end of the nozzle is split. Run the tip down your finger and see if you can feel it catching, or look at it through a magnifier. You could have a blockage in the nozzle which is stopping the needle seating properly. Flush the nozzle from the front with cleaner onto a piece of kitchen towel, or use a magnifier and micro brushes to check the inside of the nozzle. Or the white O ring is missing, or is not making contact (and sealing) with the front of the brush. Try cleaning where the O ring touches in inside front of the brush, or turn it around. Also check the o ring on the air cap is not damaged/flattened. In extreme circumstanses this will stop the aircap from sealing the nozzle and air can get into the paint cup. Paul Link to comment Share on other sites More sharing options...
Muzz Posted March 10, 2014 Author Share Posted March 10, 2014 Thanks for taking the time to reply again Paul, I'll have a look at some of the things you've suggested. Thanks again. Murray Link to comment Share on other sites More sharing options...
cger Posted March 10, 2014 Share Posted March 10, 2014 I think the white O ring you mention (apparently made of Teflon) can be ordered if needed. To check if the problem comes from the O ring you can swap it with the one from another nozzle (usually HS airbrushes are sold with two nozzles with different widths). I did this once, and it is quite easy to remove the O ring from the nozzle. Concerning the black (rubber) O ring of the air cap, my experience is that it can be removed completely without trouble, I removed mine some year ago and did not experience any problem. best, Christian. Link to comment Share on other sites More sharing options...
Muzz Posted March 10, 2014 Author Share Posted March 10, 2014 Christian, that's exactly what I've done, I knew there was areas on I kept the old split nozzle's! Changed the white O ring over and given the airbrush a good clean, I'll try it out tonight. I always thought the white O rings were fixed in place and couldn't be changed. Murray Link to comment Share on other sites More sharing options...
Mike Posted March 10, 2014 Share Posted March 10, 2014 Nah, they fall off quite easily with a little finger pressure. I usually have a full set of spare in stock for mine, just for such eventualities. Recently I forgot to remove that same O-ring when I soaked a nozzle in thinners and as a consequence, it went a bit big and saggy, so I had to punt it and fit a new one. A moment's work if you have one knocking about Link to comment Share on other sites More sharing options...
SaintsPhil Posted March 10, 2014 Share Posted March 10, 2014 I had problems with my Evo that sound similar to yours. Turned out to be a split nozzle as Paul suggested. It's not that easy to tell if it is split, short of looking at it under magnification. One thing I noticed was that the cone of paint was coming out at an angle, due to the split. If you still have issues try shooting water through it under a light and look for unevenness in the shape of the spray Link to comment Share on other sites More sharing options...
Muzz Posted March 11, 2014 Author Share Posted March 11, 2014 A right good clean and changed the white O ring on the nozzle and its back in fine working order. Thanks for all your help and replies! Muzz Link to comment Share on other sites More sharing options...
little-cars Posted March 12, 2014 Share Posted March 12, 2014 H&S produce packs of O rings for the whole 2in1 brush set (£7.50 for standard brushes & £9.50 for CRplus brushes). They also produce packs of three of each of the o rings, price per pack is between £2.50 and £5. And we normally have them all in stock. Ta, Paul Link to comment Share on other sites More sharing options...
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