How do you prime a Campbell Hausfeld Airless paint sprayer 2/3 hp

airless sprayers have a pump that pumps the paint through a jet at pressure . there is no oil and it is vital that when finished that the pump be spotless after cleaning

https://www.manualslib.com/

Try here

Go to the Campbell-Hausfeld website at http://www.chpower.com/, under the 'Service & Support" tab select 'Manuals/Parts Lists. Do a search for your model number and you'll be presented with the manuals and parts lists for that line of paint sprayers.

http://www.chpower.com/manualsearch/
Manuals for Model: AL2333Manual Description Classic Mega Bytes

AL SeriesParts List- AL Airless Breakdown.6AL SeriesParts List- AL Airless Models - Breakdown with Block- 2001.073.1AL SeriesSafety Sheet- 2011.06AL SeriesSpecifications- Airless Tip Compatibility.3AL SeriesSpecifications- Paint Tip Selection Chart- 2003.04.5

Just had the same problem with the same exact unit. Here's how to fix. Turn the pressure knob fully counterclockwise. Take a 5/8's wrench and back out the pressure knob 2 full turns. Yes, the exact same knob you just reversed only get a wrench on where it connects to the unit. Run it for a minute like that. On off a couple times.Run the gun and get the air out. You should notice it working. This is per the owners manual. Good luck man.

diaphram is weak replace it!

When you say nothing happened.
If the machine doesn't run at all, check the cord and plug.
If the machine doesn't pick up paint, read the following:

There are 2 steel balls inside the sprayer.
The first one is in the pipe at the first joint > this ball keeps prime in the pump head.
The second ball is 5" higher, and it is opened and closed by the prime valve
These balls can rust and then the sprayer needs to be replaced
Always store sprayer filled with kerosene

The prime valve goes bad too
And the intake can be clogged with wasp nest or paint.

Let's say your prime valve is okay, and the pipe is not clogged.
Tap the pipe where the ball is located while the machine is running.
See if you can loosen the ball.
If you can't loosen it, take the pipe apart, but be careful because the ball has to fit perfectly to hold the high pressure of a paint sprayer.

If you can get the machine to prime, then tap the next ball to see if machine will fill the hose.

Ok, go to campbel hausfeld web site and download a manual for your sprayer : http://www.chpower.com/webapp/wcs/stores/servlet/XManuals?langId=-1&storeId=10051&catalogId=10001
Find your model number and look at parts view. Pay paticular attention to the inlet and outet valves. They must be absolutely clean to function. These pumps must be thoroughly cleaned when finished.

http://www.chpower.com/webapp/wcs/stores/servlet/chCat_10051_10001_10661_-1

service center, find a part. write inlet outlet valve

Try to fill it with water and spray. YOu may have paint buildup in the system, and will have to disassemble it to clean it