Some way I got out of whack and replied to a newer message about your
comments about Apollo's lack of customer service. You have my
sympathy, and I am not being sarcastic.
When I bought my Fuji, I had to call customer support several times as
I just couldn't get it to spray the way I thought it should. Without
their help and their own personal experience in using their own
equipment, the road would have been much tougher. I had never used
HVLP turbine equipment before except at a demo, and getting the right
aircap/pressure/viscosity was too was almost too much for me since all
my experience was with high pressure equipment. The Fuji written
information that comes with the system isn't much better than the
Apollo, but their customer support is absolutely the best.
So - I am assuming the same problem exists. Yes? No? Spraying water
when the trigger is closed (not depressed)?
Here is the easiest way to check for debris or poor fit of the
- put your test material in the gun
- close the needle valve completely, screw it down snug
- turn on the turbien and give it some air
Does it spray material?
If it does, a few different things could be the culprit. If it sprays
unevenly, it is probably debris, which we covered earlier. However, it
sprays evenly, there are other distinct possibilites.
Each aircap requires a certain needle. In some cases, different
manufacturers will use the same needle on a couple of different sized
caps, but usually not more. I don't know what size aircap comes with
the Apollo system, but I would guess somewhere along the lines of a
See if your literature gives a size, at it should be the same number
stamped or etched into the cap itself. Now with the gun apart, check
the needle and see if it is stamped with number or I.D. of some sort.
See if it matches your literature on which needle goes with the cap.
If the needle does not fit the correct aircap setup (you will have a
stainless block that goes with the cap) then it will not seat properly
causing it to spray. You may have a needle that is too small for the
aircap assembly, and that would certainly explain everything if it
Think of the gun trigger as it actually is; no more than a valve. The
needle is the valve, and the gun block/air cap assembly is the valve
seat. Make sure that you can see the needle tip move in the aircap
assembly when you depress the trigger. It should move in and out of
sight easily. If you don't see the tip of the needle even with or just
outside the cap when the gun is not in use you may indeed have the
wrong, or a damaged needle.
You should know that the needles on >>ALL<< of the HVLP systems are
made from wire. It is a low end stainless tool steel of some sort, but
in the end, it is just wire. They are not machined or milled from high
grade mill stock to exacting tolerances. Each and every manufacturer of
HVLP I talked to said they all used the same process to make their
needles - wire. They just grind the profile on it to fit.
So, with that in mind, my Fuji guy told me that there existed a
possibility that it was a defective needle when I had a problem with my
gun. Nothing more. The needle that didn't seat properly in the gun
wasn't really round and smooth, it just looked that way. I actually
had this problem with mine on one aircap setup, and I used 100 grit,
then 220 sandpaper to polish up the needle itself. I had a tiny leak
on one setup, and a drop would form around the aircap when the gun was
idle and under pressure. That polishing out with the sandpaper fixed
I guess the last thing I would check would be the tightness of the gun
packings around the needle itself. They should just be tight enough to
make sure the gun doesn't leak. If the packings are too tight, they
will keep the needle from moving freely, which could keep it from
Let me know if any of this works - or doesn't.