Trigger sticking

Tanky,

Go down to the 4th page and look for my post titled "having problems with my Iwata HP-C+".  I had the same problem and got a lot of feedback about it.  After breaking it down multiple times and replacing O-rings I ultimately had to send mine to Adam Rice at Iwata.  I just got it back a couple of days ago (it was under warranty so it didn't cost me anything), and I haven't even tried it yet, but the note he sent back said a little lube and adjustment was all it needed (which never worked for me).  I'll be using it this weekend and have my fingers crossed.  You can contact Adam at:  adamr@medea-artool.com .

TomB

Thanks, but it's behaving now. I fixed it by lubing the actual piston thingy that goes down when the trigger is pressed. The I lubed the trigger again, and it seems OK now.

That thread was very useful though.  

I tried that too, and even replaced the rubber O-ring that the piston passes through, but the problem reoccurred after a session or two.  The thing I noticed was that the stickyness increased as the air pressure decreased.  Mine seems to be working fine now after Adam worked on it, but I have an e-mail into him asking exactly what he meant by "adjustment".  If I find out, I'll get back to you in a future post.

TomB

Tanky,

ARRGGHH!!  My sticky trigger problem returned after only one painting session.  I'm contacting Adam again, and now I'm just pissed given how much time I've spent trying to solve this problem, and the fact that I'll probably have to send it back to him again.  Hope you have better luck.  Now I'm totally paranoid that my CM-C+ will develop the same problem.  I still can't shake the feeling that the Lube had something to do with this mess, since I never had the problem with the HP-C+ until I used it, and I've never used it on the CM-C+.  I know, it doesn't make sense, but my gut tells me there's some connection.  This has stymied me on so many on-going projects since the HP-C+ is my "middle-ground" AB.  I use a Paasche VL for large area work, and the CM-C+ for really fine stuff, but my HP-C+ was the one I used most.

TomB

TB6088 wrote:

Tanky, ARRGGHH!!  My sticky trigger problem returned after only one painting session.  I'm contacting Adam again, and now I'm just pissed given how much time I've spent trying to solve this problem, and the fact that I'll probably have to send it back to him again.  Hope you have better luck.  Now I'm totally paranoid that my CM-C+ will develop the same problem.  I still can't shake the feeling that the Lube had something to do with this mess, since I never had the problem with the HP-C+ until I used it, and I've never used it on the CM-C+.  I know, it doesn't make sense, but my gut tells me there's some connection.  This has stymied me on so many on-going projects since the HP-C+ is my "middle-ground" AB.  I use a Paasche VL for large area work, and the CM-C+ for really fine stuff, but my HP-C+ was the one I used most. TomB

Tanky,

Using a very very minimal amount might be the way to go, although once I get this working properly, I'm going to try none at all like I was doing before.  Adam at Iwata has recommended a test to determine if I might have a leaky needle packing O-ring that would allow paint to seep back into the trigger mechanism.  Haven't tried it yet, though.  He also said he was going to look a little harder at the Lube to see if there's any problem with it hardening or something as was suggested in a previous post by dublove.  Along those lines, I'm wondering whether temperature has something to do with how the Lube reacts.  I live in the Pacific Northwest (where its springtime--which this year means still gloomy, rainy, and cold).  During the winter I normally warm up my modeling room downstairs before I work, especially before I start painting, and that includes waiting until my AB doesn't feel cold to the touch anymore.  I'm wondering what happens to the Lube if the airbrush gets cold in between painting sessions.  Just trying to figure this out................  I'll let you know if and when I learn anything new.  Thanks,

TomB 

I remember the last series of posts a few months ago. I have the same HP and had the same problem.

In fact it happened again recently after a year. So after I cleaned it out, I took the hose off, put in a small drop of the lubricant from Dixie Art and then cranked my regulator up to about 50lbs and let blow for a minute.

 Been working fine since. I think there is something to the cold weather idea and that lube.

 matt