Hi, my graco 3400 striper works great for a couple of hrs then starts pulsating and leaves the lines like Christmas tree, I cleaned the pressure releif valve and same thing, what can I check next? Thank u
@@user-dp1oq6ej5s I figured it out, we bought some new traffic paint, and that fixed the issue, very weird, I don't know if u have been using old paint or not, but we had gallons saved up from 2020, sealed, it's freakin weird, hope this helps
I agree water is worse than for your pump but please tell me what do I clean my sprayer out with when I run a water-based paint through it without gumming it up?
You can clean the sprayer out with water, and its ok to leave water in your sprayer for a couple of days. If you plan on letting the machine sit for awhile then I would put Graco pump armor in it or mineral spirits.
Approximately how tight should the piston valve be? I snugged it and gave it another half turn and it eventually came loose even with thread lock. Another time I tightened it pretty tight but it ripped my packings after a few uses? Help? Thanks!
You have to be careful, its a fine balance. I tighten just enough that the packing are not swelling out, and always use thread lock. And when you put the rod in the cylinder make sure you use LOTS of grease, it will help prevent the packings from getting sheared.
Is that the same for 3400? I have problem with pressure is not stable and lines from 4 inch gets down to 3 inch and go back the 4 inch all the time and mechanic couldn't find the problem. Any ideas???
Thanks for this video. My pump the valve was sticking to tite to turn to prime and spray easily. But when i did the pump would not prime when i turned to prime. I removed the dip to see if its pluged with paint and also of the ball was stuck but it was just fine. I screwed back on and tried to prime but it wouldn't. Do you think something in the prime to spray valve is broken or maybe is just plugged with paint and needs to be cleaned?
Hey quick question.. do you need to adjust the brass part of the valve by tightening or loosening it? My new valve came with it only halfway screwed down. Thank you 🙏
Simple and strait to the point. Love it! Thanks for taking the time to share the information. Very useful for me. I was wondering, my 440 turns off after several seconds and the reset button on the machine pops. I think I might have an electrical or motor problems? Please advice!
Good man using thread lock, but you know what you should do so you don't sheer the packing, screw the piston valve on but don't tighten yet, get the rod and packings in the sleeve then tighten the piston valve so it bulges in the sleeve.
Thank you so much for the video! The large check ball that came with the repack kit is larger than the ball that my sprayer comes with and will not fit into the cage. Everything else fits perfectly. Any suggestions?
can you repair/rebuild the foot valve on a 440e or is there a foot valve that you can substitute like the foot valve on a 440i? I have a 440e not priming if the footvalve is place in water it sprays......any ideas thanks