I have wagner paint pump and it isn't pumping the paint anymore, I think that the paint has dried up and is blocking the paint. How can I check if this is really the problem and how to solve it? How canI open the pump and pour inside some liquid in order to "de-block" it
I think you do know that you did not properly flush and clean the pump after the last
time you used it......If it is a diaphragm pump, remove the inlet valve and make sure
the valve and spring are perfectly clean....Soak it in paint remover for a day or so
if needed.....Remove the retaining nut which is covering the outlet valve......Clean the
very, very small ball and spring....DO NOT LOSE....Replace all parts when clean....
Also check your hydraulic fluid in the pump's sump.......If it is a piston pump, remove
the inlet valve and make sure the ball is free and not stuck to its seat.....Tilt the pump
on its back and look up into it.....With a pencil see if the other small ball in the piston
is also free....Try to pump warm water through the cleaned pump....Without hose or gun......If it pumps fluid, replace hose and gun without spray tip....Test for flow again.
Then finally replace the spray tip......Chase out the water with the paint.....
The Pump Doctor
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The Wagner Paint Crew airless sprayer does not require oil for its operation like full professional sprayers. The piston is off-set from the pump chamber with the inlet and outlet valves opposite each other, however you need to protect the parts from corrosion between use and Wagner recommend running some light oil through it after cleaning. If you will be using it in a day or so for water based paint, you could run a 10% solution of their EasyGlide through it.
I'm sorry to hear that the container is stuck to your sprayer. Besides a bad thread or cross-threading, there isn't really any reason the container would be stuck - unless paint had been left in the gun long enough to cause it to dry. call 1-800-328-8251 and they'll do our best to assist you with this.
As a note, the Control Spray Double Duty is a thin body material sprayer for things like stains, sealers, varnish etc. Not for thick latex materials, which I suspect is what you're applying to the wall and ceiling. Not that this would cause the container to get stuck on the gun, but I wanted to point out that this gun probably isn't the best for the project you are tackling.
R D, I think the spray nozzle is blocked with previous paint job. I would try soaking it in paint solvent for a few hours to see if it helps. Use the cleaning brush to clean as much as you can all the channels where you see paint. good luck.
The inlet valve is probably stuck. It is a flat poppet type, so you need to free it up. A Graco dealer should be able to supply a special small plastic bottle with a special top filled with their Pump Armour to do this job. Otherwise you can unscrew the inlet valve from the cup side to clean it out, but be careful not to lose the small spring. You should always flush Pump Armour through the ProCoat after use otherwise the passageways corrode
Airless Paint sprayers have two check balls that push the paint through the system. If one or both are either blocked open by anything or frozen on their seats by dried paint or hard water, the machine will do what you are describing. First with the machine running in water, try hitting the pump unit smartly with a hammer. The object is to knock the ball(s) lose without damaging the pump. If it frees up and starts pumping, run a cleaner through the unit to get everything out. If it does not start pumping, you are going to have to go inside to find out if the check balls are blocked or if the packings are damaged to the point they won't move paint anymore.
There are two check balls in the pump that make it work. If either are blocked or stuck it will do what your are stating. Tapping the pump with a hammer will work to free check balls that are stuck to their seat by corrosion but will do nothing to remove paint chips or dried paint that prevent them from working properly. You can try forcing water throught he pump while it's running with a garden hose to see if that will clear any problems. If that doesn't do it you will have to disassemble the pump to clear anything that's keeping it from working. If you're familiar with the workings of a paint pump, it's not hard but be careful not to damage the packings, piston or cylinder.
1. Does it pump paint in PRIME position. If yes, then the outlet valve assembly may be stuck or bad.
2. If it won't pump paint in the PRIME position, the inlet valve may be stuck, just poke your finger down the inlet hole (machine off) . It is spring loaded and should move about an 1/8".
3. The worst option is the pump piston if froze. To check: remove the plastic hopper assembly, comes off with about 4 screws from underneath. The whole thing just pulls off. Now you can see the inlet assembly with two O rings. Use the white plastic hex shaped tool comes with the spray, and stuck on the lower base of the unit. Unscrew the inlet assembly. If clean enough, you can see the end of the piston. It's about a 1/4" diameter. Turn the machine on for a moment and you shoud see the piston move back on forth. If it doesn't the piston is froze. Good Luck with that.
1. There is an inlet valve where the paint first enters from the hopper. With the machine off, you can poke your finger all the way down the hole. It's spring loaded and will depress abouta quarter inch. If the inlet valve is stuck no paint will pump in PRIME or SPRAY position.
2. In SPRAY position. Motor runs for a few seconds then turns off. This means the pump is working. When you pull the trigger, if you get poor pressure, the problem is in the gun. Unscrew the handle and remove the filter. Clean out everything you can, and replace filter if necessary. Also try turning the spray nozzle 180 degrees and spray to clear if necessary.
there are more things that can go wrong, but these are the most likely.