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The Air Cap from Hell1/14
Just got a new C.A.Technologies CPR FE-FF gun to replace an HTE gun I can no longer get parts for.
Have been using a CPR FE-FF for over 4 years and have been pleased with the gun - which is why I bought another.
Before installing the new one onto the pressure-pot setup, I pulled and lubed the needle, removed and swabbed the nozzle and dry swabbed and back-blew the air ports. Installed it on the hoses and ran thinner through it.
Then set it up with sanding sealer. And it sprayed bottom heavy - badly. Air cap crud, right? Rotated the cap 180 - bottom heavy still. Needle/nozzle issue, right? Or air ports.
"Cut to the rub after all the screwing around, Jim." Switched the needle, then the nozzle from the old gun into the new one. Testing one part swap at a time. Still bottom heavy. Put the OLD air cap on the new gun and ... bliss. Then installed the new needle/nozzle/aircap on the old gun - one change per test. And when I put on the new aircap - persistent bottom heavy. Put the four year old aircap on and bliss.
I did this over various input pressures both air and fluid. The only time the new aircap did NOT go bottom heavy was when I cut the fan to a dot. Gotta say, I never (22 years) have had an aircap issue like this - where rotation didn't expose the culprit. And it can't be something in the internal air passages nor dispersion ports, because the old cap yields bliss.
Thinking it must be something related to the seat of the cap - but it is beyond me and I'm gonna yelp at CAT to get a replacement.
But now they are Wagner owned ... so who knows ...
Defective air cap, improper milling of the holes?
I had the same thing last year on a CAT gun that was sent to me with intent to purchase. I found it was poor machining on Aircap. Plus there was lots of free play with aircap that it would be off center to fluid nozzle and cause fan issues. I sent it back. Went with another brand.
I have never been happy using Cat..
I have used the Binks 2100, 2001 for nearly 15 years...best gun on market for the price.
In addition I use DeVillbiss Compact pressure fed, and hvlps..
And for Cadillac finish I have 2 Anest Supernovas
And a Kremlin Rexson EOS for clrs
Have tried to give CAT a fair shot, they just always fall short