Note: This was previously posted, but I decided to pin it up since the topic seems to come up rather frequently. This might just save your Aztek from a trip back to Testors, so have a look:
If the trigger goes floppy, or if you encounter resistance when pulling it back, STOP!!!!!!!!!!!!!.
There is a delicate linkage assembly inside the airbrush that is prone to breakage if you try to bulldog the action. As has been mentioned previously, you will void the warranty if you open the airbrush body, so don't do it. Here's what you do to free the action:
1. Remove the paint tip.
2. Tip the airbrush up, and mount it perpendicular to the ground. I have a spring steel clip that I mounted to the side of my workbench for this purpose, which also serves to store the airbrush when not in use.
3. Insert an empty color cup into the siphon port.
4. Using a dropper/pipette, add a few drops of lacquer thinner into the open nozzle until the needle plunger is submerged, and then let it sit. This will loosen up any clogs or paint buildup around the plunger. If it is a small amount of paint, you may hear the plunger snap forward - it is now unclogged. If it doesn't, add a bit more lacquer thinner to the color cup, and let it soak overnight......this should solve the problem. The next day, come back, dump any thinner left in the brush, and then use a Microbrush dipped in lacquer thinner to very carefully clean around the plunger. This should free the plunger, and you can now try to carefully work the action.
Oh, and by the way, DON'T look down the bore with the airbrush in your hand. An accidental squeeze of the trigger will give you a shot of lacquer thinner right in the eye, and trust me, you don't want that (Does it sound like I might know from experience?
If it still doesn't work at this point, send it back for repair or replacement, but this will fix the problem 99 times out of 100.
Note also that cleaning around the plunger on a regular basis will greatly improve the performance of the airbrush, and should help to prevent this problem from occurring in the first place.
Now, as for the tips themselves:
I know what Testors says about cleaning the airbrush, and the fact that they say that tip disassembly is unnecessary. I don't know about you, but I've never been able to get the tip/needle assembly clean just by spraying thinner through it. This is what I do:
1. Remove the tip.
2. Remove the needle/spring casing from inside the tip. Remove it carefully - you should be able to pull it out with your fingers. A good idea is to disassemble the tip inside a small plastic bag to prevent loss of any parts.
3. Remove the needle and then the spring from the casing. The needle will pull out, but you may need to use a toothpick to remove the spring. Be very careful, or you'll lose the spring.
4. Fill a film canister or shotglass with lacquer thinner and soak the parts for a bit.
5. Remove the parts, wipe down the needle, and clean the inside of the spring with a Microbrush. I also use a Microbrush to clean out the inside of the casing as well, but that's up to you whether you want to do that or not. I also use a very fine piece of copper wire to very carefully (and VERY gently) 'floss' out the aperture. Again, this is up to you whether you want to do this or not.....as an alternative, you could also use a small plastic eyedropper to repeatedly flush the tip with thinner.
6. Reassemble the tip - CAREFULLY.
DISCLAIMER:
I accept no liability or responsibility of any kind for any damage caused to your tip. This requires the user to be very careful in disassembling (and then reassembling) the requisite parts, and failure to do so will probably necessitate replacing the nozzle. While this works for me, you are advised to do so at your own risk.
Remember: DON'T DISASSEMBLE THE AIRBRUSH BODY - YOU WILL VOID THE WARRANTY! There's nothing inside that you should be fooling with anyway - if the problem can't be remedied by cleaning, send it back - that's what the warranty is for.
I will try to add some pictures on this topic soon to help illustrate the instructions. Hopefully, it'll save some heartache for someone out there.
HTH!

Help




















