** Where's nailshooter Robert when you need him? I'm pretty much
ready to toss
this gun and get one of the gravity feed models instead... **
More importantly than where, is what has he been doing? Working on
some new emergency work contracts. A few really windy storms did a
lot of damage here last Friday, and I have a lot of brand new "best"
friends that are looking to have their domiciles secured. We have 40%
chance of thunderstorms Tuesday, Wednesday, and 30% on Thursday. I
almost have more than I can deal with now. I haven't had this volume
of calls in a year or more... lots of panic amongst my customers!
"Big Guy... you know what we call "crisis" in sales? (Taps his head
Herb Tarlek, Sales Manager
WKRP - Cincinnati
There aren't really a lot of places for any of these little guns to go
wrong. More importantly, almost all MY personal spray gun problems
have come down to 1) improper cleaning 2) reaction of materials in the
gun to one another causing almost invisible material clots 3) improper
It is hard to diagnose without seeing the gun in person. That aside,
I am thinking that Mike probably hit this one (although it may seem
improbable to you) early on. I'd be the problem is in the siphon
There have been good posts that address all the likely suspects, but
it sounds like you have done a pretty good job on your own.
On the other hand, you may have a bad gun. Doubtful, but possible.
I am sure you are taking the gun apart correctly and putting it back
together correctly as well, so I won't bother with that.
I would take the gun apart again. This shouldn't take too long,
especially in the light of the fact you can probably do it blindfolded
now. Re-clean the inside of the housing chamber where the packing and
the retention nut for the packing go between the fluid nozzle ( #4)
and the packing and nut ( #16 and #17 ).
Take a BRIGHT flashlight and see if you can peer INTO the housing and
carefully inspect the needle packing area as well as well as the area
for the volume adjustment. These must be spotless. Everything inside
the gun housing must be spotless.
Use a gun brush to clean the inside, the threads. Use a toothpick to
clean the threads to see if anything comes off. Since this gun is
dead, if you find something you can't get off, try some paint stripper
on your brush and brush the inside of the housing out to see if
anything comes out. Don't leave it in too long as it will peel off
the chrome. Put it in brush it vigorously, then rinse it out.
After yet another full inspection, and making sure you are installing
all parts, reassemble. When you assemble, start at the back of the
gun and put in the needle assembly, packing, nut, etc. On the needle,
put a small amount of petroleum jelly on the length of needle all
around it. If the packing is good, it will skim off the jelly it
doesn't need and you can clean it off with a towel. This will make
your trigger much smoother and easier to shoot, and seal a bit better
Put the trigger on.
Assemble the volume adjustment group. It is tempting to put in the
ring/washer, then the packing, then the retention nut, then the
screw. Try it this way: install the screw into the retention/receiver
nut. You don't have to screw it in all the way. Once you have it
seated well, put the packing ring over the end of the needle, then add
the washer on top, then install it all into the housing. Before final
assembly of this group, put some petroleum jelly ( a bit ) all over
the packing ring to make sure the needle isn't sticking to it. It is
possible that a deformed packing ring (from assembly or sticking to
the screw) has added to your problem, and this could help prevent it.
As a sidebar, take a look at the volume adjustment screw. Some of
them are different than others. On some models, the screw is hollow
to facilitate material movement. If you have a hollow screw, then
make sure both ends are perfectly clean. If it feeds material through
the screw, the tiniest piece of debris will foul your gun.
Now you have everything put together except the things in front of the
housing. Open the volume screw about half way. Hold the gun securely
in one hand, and an rubber tipped air nozzle in the other. Insert the
rubber nozzle in the fluid nozzle seating area way to create a bit of
a seal. **Gently** open your air and see if any air comes out the
bottom of the head. If it doesn't, open the screw all the way and see
if you can get any debris to come out. If that doesn't work, close
down the needle, the put the air in from the underside of the gun and
the flow should come through the hole where the fluid nozzle goes.
If no air comes out, try increasing the air. You have probably found
Take a really hard look at the fluid nozzle. Run a toothpick through
the nozzle <from the back> until it pokes out of the fluid tube where
the needle sits. DO NOT push your toothpick through from the front as
you can easily leave debris that will re-clog your nozzle. If you can
see unobstructed daylight (again, hit it with the flashlight) then
after making sure there is nothing at all in the air ports, attach to
Finish the assembly of the head.
Last, take a look at your pickup tube. Before installing you should
be able to hold it up to the light and see all the way through it, and
it should be clean as a whistle. If it is, install it.
Once again, make sure you can see through the vent hole in the cup
Try opening the air all the way (no more than about 20 lbs from the
compressor, all the way on the gun), and the fan about half way. Try
shooting some water through it.
Honestly, I would be surprised if you didn't cure it with all of
that. There just isn't much to go wrong with these guns. I just
sounds like a bad seal, bad seal placement, or a small piece of debris
got past you when cleaning.
But knowing that the most I have paid for either of the two I have was
$10, I wouldn't have my feelings hurt to go buy another or ask for a
Let us know....