MY PUMP MODEL AL9015 DOES NOT HAVE PRESSURE AND DOES NOT HAVE SUCTION TO TAKE THE PAINT

The issue you're describing with your Pedrollo 80L horizontal pressure tank not having suction and not pressurizing could be caused by several factors. Here are a few steps you can try to troubleshoot the problem:

1. Check the installation: Ensure that the pump and tank are correctly installed, and all connections are tight.
2. Check the air pressure: Make sure that the air pressure in the tank is at the correct level, usually 2/3 of the total pressure.
3. Check the inlet and outlet: Ensure that the inlet and outlet are not clogged or blocked.
4. Check the suction line: Make sure that the suction line is not kinked or damaged.
5. Check the foot valve: Make sure that the foot valve is functioning correctly.
6. Check the check valve: Make sure that the check valve is functioning correctly.
7. Consult the manual: Consult the manual for specific troubleshooting and service information for your Pedrollo 80L horizontal pressure tank model.

If the above steps do not resolve the issue, it is best to contact Pedrollo customer service or a professional for further assistance and repair options.

Check for air leaks above the top of the feeder tube. If it leaks air there, then no suction. Bad gaskets often cause this.

No make or model, so no help until that is known.

Inlet/Suction is always the port that is Horizontal.
Discharge/Pressure is normally Vertical.
So to answer your question specifically about this pump: The answers are above.
For others that may have a pump body that rotates, the discharge/outlet/pressure can/may also by choice, be horizontally exiting. But the horizontal port for discharge will now be "Perpindicular" to the motor vs. "Parallel" with the motor.
A "Horizontal" port Parallel with the motor will always be "Suction/Inlet"

Airless paint sprayers should not turn off while in prime mode. As long as the prime valve is open the motor can pump paint but the system will not build any pressure. Once the prime valve is closed the pump should pump paint into the hose until it gets to the pressure level required to turn the motor off. If the pump does not turn off with the prime valve closed, it could be that the spring in the valve is weak and won't hold the valve closed under pressure. If the hose is up to pressure and the motor just keeps trying to pump paint, you may have a bad pressure sensor or it is disconnected from the circuit board.

It depends on what kind of spray gun you have. If you have a HVLP gun the pressure doesn't have to be as high, but you need a compressor that will keep up. The pressure is usually pretty low on these guns, about 15 PSI or less. The paint manufacture will usually give you a recommended pressure to paint their paint. A normal (old style) suction type gun takes more pressure, about 50 PSI. If you are asking this to decide on a compressor size, you will find that a one horse motor on a two cylinder compressor will not keep up. The newer supposedly five horsepower compressor will not keep up consistant pressure either. You need a five horsepower that runs on 220 and driving a belt driven two cylinder compressor minimum. You can get by on less, but have to wait half way during a coat on a car to wait on the compressor to catch up. This may be o.k. if you are just going to paint one car, but if you are looking to do this consistantly, then I would get a five horsepower motor on a two stage compressor. Make sure you drain the air tank of water and use a good air filter to remove moisture from the air before trying to paint. Hope some of this helps you.

because you used activator so the paint will be dried fast, therefore u probably want to paint it in a fast pace. set inlet air pressure at 2 bar, fluid control all the way until the trigger is loose. fan all the way open. paint it closer then normal and move fast.....i dont use activator but that's probably how i would do.

have you cleaned the suction tube going down into the paint bucket? if so did you make sure the check valve was reassembled correctly. if not it will never pull the paint up the suction tube into the pump to the gun.

The pump is not properly primed due to suction leaks. Check for leaks in your suction line. Check also the integrity of your suction check valve.

Any air leaks in the suction portion of the machine will cause it not to spray or spray weak. This is a airless paint spray correct? Your paint should be at least thin down using 1 gallon of water for a 5 gallons of paint. I find Baer paint is even thicker and had to slowly add more water.

To check if it is your paint. Fill a bucket of just water and see if it will spray your water. Of course after it gets a good prime. Let it recirculate until the water is coming out of the bypass as a solid stream. If it does not spray water then you have either a air leak or your pump packing needs replacement.

Let me know the results and the make and model of the machine.