Graco paint sprayer loss of pressure

[@TheValuablepainter]

Your the Master. With your videos I don’t take them to the shop no more, I do it my self. Thank you Dude!

[@Brian_the_repair_guy]

As I mention in my videos, these are not a substitute for a certified shop. These are for educational purposes only and to help you in a jam.

[@PablitoVazquez-f2g]

😊​@@Brian_the_repair_guy

[@harryboy2010]

Thanks mate, the hit with the hammer work a treat. You have saved me time and money with this video. 👌

[@Brian_the_repair_guy]

Very glad to help you out.

[@davidregan9872]

I used to have to wack them sometimes to get them to work. Other things were CLOGGED screens! I cleaned one that had OIL, and Latex paint so bad I had to replace it! Most people don't know about the IN-LINE filter, or forget about them!

[@jomc3]

Was beginning to doubt this but when I took it apart for a second time the ball dislodged spraying me with water and paint 😂 thank you for what you do

[@Brian_the_repair_guy]

No problem, I am happy to help

[@AW-yv9sq]

Nice to see a person who fixes everything as I do with a hammer

[@Brian_the_repair_guy]

Right tool for the right job

[@frankordonez2826]

You re such of great teacher dude apreciatted thougth

[@Brian_the_repair_guy]

I hope it helps

[@take1er]

Awesome video man, thanks for the information. I have this exact same liner and it starts up, but once you squeeze the trigger it shuts the motor off. Any information will help if you can. Thanks

[@Brian_the_repair_guy]

@@take1er find me on Facebook. You can send a video of the problem

[@MrYusufibn]

You showed me how to, but the primer valve on my sprayer is the problem. How do I change that part ?

[@Brian_the_repair_guy]

@@MrYusufibn I belive I have a video in my library on how to replace them. If you can find it, let me know

[@curtisgore1611]

Great video! I would like to see you go into that prime valve

[@Brian_the_repair_guy]

Will do. I will make that video in the up coming week

[@youngkim8887]

Thanx much. Now I understand which piston area(part) is relate to pressure problem. I could disassemble piston but I have no idea where & what problem is.

[@Brian_the_repair_guy]

Glad to help

[@williambarrera1459]

Thank you so much. You’re errand my subscription.

[@Brian_the_repair_guy]

Thanks. Hope the videos help

[@giannirivas3154]

this video saved me from getting a new sprayer 👍

[@Brian_the_repair_guy]

Fantastic

[@darylbowman5713]

my inlet house will not stay tightened. Am I missing a gasket or something. as the machine runs it loosens no matter how hard I tighten it

[@Brian_the_repair_guy]

There should be a gasket st the end of the cylinder like in the video. You can not tighten with a wrench. You must hit it multiple times with a hammer like in the video

[@Asphaltrejuvenator]

Great info video thank you ! Can you loosten piston housing up to turn the line fitting in another direction ?

[@Brian_the_repair_guy]

Not sure I understand. Are you wanting to have the pump hose point in a different direction? If you do, then yes you can turn the cylinder to where you like as long as the hose is not stressed.

[@Asphaltrejuvenator]

@Brian Shumack the repair guy awesome 👌

[@itztheurge]

2nd day with a brand new Graco 390 PC and its not holding pressure, spitting out the waste valve when on spray mode. Balls are clean, lol, not stuck, no debris, everythings screwed on properly. No idea

[@Brian_the_repair_guy]

@@itztheurge find me on Facebook for help

[@chatohernandez9745]

thank you for sharing you just got me out of the band

[@Brian_the_repair_guy]

I am glad to help

[@LeviFaram]

Hey Brian have done everything in this video but the sprayer still won’t build pressure or prime it’s self is there anything else that it could be ?

[@patriciar7202]

I am learning so much, thank you! Question…my Magnum only seems to spray consistently if I turn psi way up - which produces so much overspray…what can I look for / do?

[@Brian_the_repair_guy]

The magnum series is a homeowner machine. Once the pressure begins to drop, you have to replace the pump. Some models can't be replace cost effectively. If you do this for a living, I would suggest a Graco 390 or Titan 410. I am glad it helps you

[@jeffpruden3234]

Dont think I'll be taking my 1700.00 machine to a carpenter, with a hammerhead...just sayin

[@Brian_the_repair_guy]

Always do what you feel is best no matter what the experts say.

[@pauleuliano466]

Right 😂😂😂😂 what’s this guy thinking

[@controlledchaos2496]

I bet you’d hire an electrician to change a light bulb .. too dangerous !!! 😱😂

[@Readyfreddyize]

Hi Brian my Graco 490 ultra mx II upper ball is stuck. I removed and cleaned the lower ball section. I inserted a small pick up to check the upper ball is not free. How do I get the upper ball free?

[@williamwinsor7376]

I expected the wipe ring to be melted down around the piston. And I suspect the packings have to damaged somewhat and the last time I had to clean out the lower ball the owner thought it would be a great idea to do it every time until the seal failed on the cylinder and it leaked. I have a drawer of lower ball cages probably like you do. It’s hard to tell owners how to do maintenance without getting a blank look because they just want it to work! It’s hard to determine how far to go on every machine.

[@Brian_the_repair_guy]

True. Each machine is like a new adventure, even if they are repeat "offenders" or first timers. I try to teach them proper use and maintenance. They are painters not mechanics and that's about as far as it goes. Some try, but eventually get out of the proper practice. In the end, I do my job to make money. I also try to teach and I know that if they follow what I teach, it can mean less money for me. If they learn, I am happy to not see them as regularly. If they choose to ignore my words I am happy to take their money.

[@timwalters1885]

I know I’m a little late just thought I would leave a comment. My pump sprays just fine and then all the sudden it’ll go dead like it’s been unplugged but then I check it still plugged in and everything I turn the pressure all the way up and it works but below 3/4 of the way won’t work at all.

[@Brian_the_repair_guy]

My first thought would be a failing transducer or pressure control. Second thought would be a malfunctioning board. What machine do you have?

[@sergesanz7767]

Thanks for your help, the Titan 440 works in the same way ?

[@Brian_the_repair_guy]

Very similar. Some slight difference

[@JJB_320]

How does a ball guide get damaged?

[@Brian_the_repair_guy]

There are typically 2 types of damage you will see in a ball guide. One is pressure cutting. This is damage to the smooth surface due to a failed seal. This allows the materials to seep past under pressure and it will eventually "errode" away the metal leaving pits and scratches. Two. What we have in this video is compression damage. Over time the constant pounding of the piston compressing the paint against the seat as well as the tightening of the inlet housing will eventually cause the guide to compress and flare like in the video. The guide is a softer metal than the rest of the fluid section.

[@jrivas6339]

My 395 Tall boy will prime but wont hold pressure? I repacked it and it was working good but now this. What you think?

[@Brian_the_repair_guy]

Typically if you go from holding pressure, to pressure loss and the oump has not been opened, then you will have some debris in the pump restricting the flow or Ball movement.

[@jrivas6339]

@@Brian_the_repair_guy I found a major gash in steal under where the seat is. I’ve been replacing gaskets there for a while now. Looks like I have to replace the whole damn inlet line

[@Brian_the_repair_guy]

@@jrivas6339 yes, if there is damage to the metal under the seat, the inlet housing has to be replaced. About $85 or so

[@danielwong6049]

I've been told that I can buy a disposable displacement pump or an endurance pump that can be rebuilt with the repacking kit. Is there really a difference between the two? Can I buy an aftermarket non-OEM pump and re-pack it?

[@Brian_the_repair_guy]

I can't answer if you can buy a nonOEM pump and rebuild it. I have no idea. Graco does offer 2 replacement pumps for the 390-595. One is the endurance pump. The other is the Express pump. The express pump is much less costly. Throw it away and replace it.

[@OscarRomero-ck3fb]

Hey thanks for the awesome video!

[@Brian_the_repair_guy]

Hope it helps.

[@T.fellaman]

Ive had a recurring problem with my 395 where it primes no problem but then after a few minutes pressure steadily drops off and then nothing at all. Trieed all remedies you recommended here but still nothing. Im not sure how i discovered my solution butt i removed smart control panel and on the inside-right, on the very edge is a plug which resembles a phone jack. Anyway, i unplugged the jack, waited a few minutes, then plugged it back in. Worked like a charm. However, like i said, it is recurring. So unplugging jack works. I tend to think plug may come loose from sprayer being moved around from shop to truck and so on. Have you ever come across this?

[@Brian_the_repair_guy]

That wire is the transducer. It measures the pressure you have on the machine. When it goes bad, you will get all kinds of pressure issues. I would suggest replacing the transducer

[@T.fellaman]

Graco transducer ​here in Canada runs around $300. You probably wouldnt recommend an aftermarket replacement?@@Brian_the_repair_guy

[@chrismendez6332]

Hey Brian, question I have a graco 390 prostep, I'm not having loss of pressure. My problem is that it's building to much pressure and won't stop. I have to run to relief valve so hose doesn't bust. Any insight on what could be the problem? Thanks

[@Brian_the_repair_guy]

The pressure control is most likely bad. Part number 249005. About $85. Slight possibility of the board, my go to would be the pressure control though

[@chrismendez6332]

@@Brian_the_repair_guythanks for reply, I have installed new pressure control, new relief valve, new cylinder with new packing kit, new board and still having the same issue ... can't get the pressure to stop building up smh

[@Brian_the_repair_guy]

@@chrismendez6332 can you find me on Facebook? This will be easier to do and faster

[@LuisElebario]

Is the packing o-ring necessary (158776), it's located between the top of the packing and the packing nut?

[@Brian_the_repair_guy]

That oring is to let you know if you overnighter, and it helps prevent the packings nut from backing up during use. It is not 100% needed, but helps

[@raulzamora8928]

Thanks for the knowledge.

[@DownloaderVideo]

Hey Brian, I just got a 395 that primes and builds pressure but keeps creeping a little every 2-3 while a rest. At first I thought new packings needed but when opened it up found the cylinder has a couple scratches but no visible damage to the packings….question: I have seen a video where the guy uses 600 wet sanding to make the scratch surface softer and get a little bit of more life out of the cylinder, what’s your opinion about this? And finally….The sprayer is working besides the annoying constant creeping of the motor so is there any risk of damaging more parts by running it like this? Asking because everything else like piston etc look great. Thanks in advance Brian.

[@Brian_the_repair_guy]

Sanding the cylinder will make no difference in the end. By sanding it out, you do 2 things. First, you change the diameter, this means the cylinder is larger therefore the factory specs for the ratio of the cylinder and the packings are not as tight. This will allow more of a chance of high pressure leaks and will speed pressure cutting. The second thing, you will inevitably sand one section more than another, putting the cylinder in an oval shape. Again leading to pressure cutting and increase the creeping intervals you currently see. The cost of the cylinder is minimal along with a set of packings. I personally would never bother taking the time to perform the sanding because it will make zero difference and save you nothing.

[@DownloaderVideo]

@@Brian_the_repair_guy Agree, that's why I wanted to run it by you first.....would I risk too much if I just run it the way it is until it gets worst?

[@Brian_the_repair_guy]

@@DownloaderVideo you cylinder is already beyond repair. Nothing to worry about there. The packings will wear faster now, just keep an eye on the pressure. As the packings wear, the pressure will be hard to maintain and the creep will be more frequent. If the packings wear too much, you could get pressure cutting on the piston. So just be aware, but other wise you should be good.

[@DownloaderVideo]

@@Brian_the_repair_guy Thanks as always Brian!

[@DownloaderVideo]

@@Brian_the_repair_guy Brian, the sprayer is building pressure all the way to 3300 and I’m able to spray no problems but the creeping is non stop. I made a video: kzbin.info/www/bejne/qJStloGVjp5go5Y When it stopped it was because I turned down the pressure to see how it was holding it. Am I already breaking stuff or can I keep pushing it? 😬 Thanks in advance!

[@kachmarik88]

Hammer 🔨 works 💪. Thanks 👍

[@Brian_the_repair_guy]

Happy to help

[@philliphall5198]

Is this problem because not cleaned good enough ???

[@Brian_the_repair_guy]

That can cause it among other things

[@bass_stache]

Hey great video. I have a Graco 395. It primes ok and ready to spray. When I start spraying my pressure bleeds off. It wont cycle. If i turn the machine off then on it builds the pressure up only to bleed off after a few sprays. I have repacked it. Changed my transducer out. Any help would be greatly appreciated

[@Brian_the_repair_guy]

First thing is putting a pressure gauge on the machine to see what the max pressure is. Then spray and watch the gauge to see if and when the pumpp starts to run again.

[@T.fellaman]

This sounds just like what I've been through with my 395. I don't know where I discovered this but I removed smart control cover and on the inside right hand corner is plug which resembles a phone jack. I unplugged jack and waited a minute before plugging it back in. Bingo, ran fine. However it tends to be recurring and I have to unplug jack every once in a while to get the machine running again. I think the plug may actually come loose from being moved from shop to truck and up and down stairs on job sites. May help.

[@noslrak2000]

Looks like your customer had spend exactly NO time cleaning this before it got stuck...

[@DownloaderVideo]

Excellent!

[@ralphowen3367]

Does the inlet valve on a Graco Magnum airless have a gaskey in it? When cleaning the inlet valve, I found what looked like a black gasket broken inside

[@Brian_the_repair_guy]

Which Magnum unit

[@ralphowen3367]

@@Brian_the_repair_guy X5

[@richardbackes3184]

My prime works but when I switch to build pressure in the dispense hose it runs out the blow off tube and won’t build pressure. Is there another check ball inside the pump for the older magnum X7?

[@Brian_the_repair_guy]

If it is coming mlm out of the prime valve then the valve has an obstruction or it is bad.

[@InfamousCrow]

My Graco striper stripes wavy lines. Just installed new pump and still wavy lines

[@Brian_the_repair_guy]

Do you have a pressure gauge on the machine?

[@josemerino9464]

I have a older model 395 graco. It pumps water like a champ but when switch to paint it struggles. Why is that ? Please help🙏

[@Brian_the_repair_guy]

Could be packings going bad, piston or cylinder may also be bad. Could be a leak at the prime valve

[@christophermoltisanti9595]

Will it suck paint without hose?

[@Brian_the_repair_guy]

Without the pressure hose the machine will continue to siphon material.

[@christophermoltisanti9595]

@@Brian_the_repair_guythank you

[@noetrejo5043]

I di not understand why used a hammer instead a wrench others tools to releases that .

[@Brian_the_repair_guy]

The part should be installed with a hammer to ensure tight compression. A wrench will not achieve the proper torque. Using a wrench will not usually remove the intake housing for the same reason when it was tightened properly.

[@Pw-f100]

I bet pipe wrench would work on it if your afraid to hit it😂

[@ricardorodriguez4353]

Thanks for the video, but why does my sprayer keep sucking up water it won’t stop and I lose pressure, any ideas ? It just keeps going and going instead of stopping

[@Brian_the_repair_guy]

Of the water is not leaking back out through the prime valve then you may have something blocking the upper or lower ball or packings are bad. You have any other information on what's happening

[@TheGreenLoveEarth]

​@Brian Shumack the repair guy I have the same situation but the water is flowing back out of the main fill pump and the prime line. Sprayer never fully primes. Just runs. Water runs through fine, both the main intake and the prime outflow but it will not prime. Both balls are clear, machin is very clean. Gaskets are good. Not sure what to do.

[@Brian_the_repair_guy]

@@TheGreenLoveEarth I have a feeling your prime valve either needs to be replaced or has debris in the valve. I have a video on how to determine this

[@cadeeands]

Brian where can i get this rebuilt kid for this pump cheep.

[@Brian_the_repair_guy]

Not sure about cheap, but Sherwin Williams should have these kits.

[@GatogatoGato-o7i]

Hey brian my machine graco210 pc no stop pressure and loss pressure to spraying ???

[@Brian_the_repair_guy]

Machine is running, but no pressure to the gun?

[@gman3728]

i have a Graco ultimate mx 695 that keeps building pressure after trigger release. is this a faulty pressure switch?

[@Brian_the_repair_guy]

My first thought is the transducer.

[@Blackat2447]

Hey dude! I hope you're doing great, I have a little problem with a 490 Ultimate MX II, the prime valve doesn't seem to be sealing the pressure to the gun hose, the water keeps running through the draining hose even when the valve is set to pressurize

[@Blackat2447]

Kinda like 12:45 part of the video

[@Brian_the_repair_guy]

Does the valve leak at low pressure or when the pressure is higher? Have you pulled the valve?

[@Blackat2447]

@@Brian_the_repair_guy thank you for your answer! The valve doesn't seem to have any kind of leak, the problem began when I was cleaning the machine, usually I charge it with water so I can get rid of all the paint inside the gun hose, but this time the machine was struggling to build the pressure and water kept coming out from the drain hose even though the valve was set to spray, I haven't disassembled the valve yet. Was looking for videos about the problem before tearing it apart and that's how I found your video 😁

[@Brian_the_repair_guy]

@@Blackat2447 if your prime valve continues to run water while it is on spray, then you have a leak. The top 2 reasons for a leak is the valve is bad or there is debris in the valve not allowing it to close properly. This video is for Titan, but it is exactly the same for Graco. kzbin.info/www/bejne/onLbhXqZjMiMkLc

[@Blackat2447]

@@Brian_the_repair_guy Thank you so much for your help! You saved me a trip to the repair shop

[@jeffreyalwin1644]

Hi Brian. I have a 495 ultra max 2. It will prime normal and pressure up but after about 10 minutes you can visibly see the lower end of pump loosen up and paint will start spraying everywhere as it try’s to keep pressure . If I tighten it back up it works for a few minutes then does it again. The entire unit is only 2 years old. I’ve changed the packings and replaced o rings. Any help would be awesome. I’ve asked long time painters and they have no idea.

[@Brian_the_repair_guy]

Make sure the inlet housing has clean threads. All the way down to the valve and guide. Same for the cylinder. Replace the lower O ring on the cylinder. When you tighten the inlet housing you MUST hit it with a hammer to ensure it is tight. Hit the tabs like it owes you money. About 3 swift times. If the housing continues to loosen, replace the full fluid section. It costs about $380.

[@michaeldiffey3791]

@Brian_the_repair_guy what happens if I do everything you say and it keeps leaking. Graco has done something for the pickup tube housing to come loose the way it does. My o ring is fine, my threads are clean, I hit it with a hammer and it keeps leaking. I'm about done with Graco.

[@codymaltzman945]

Having trouble with gun not spraying… any ideas

[@Brian_the_repair_guy]

Explain the full problem

[@drkerman11]

Do you know if the pressure valve has a broken wire, will the XR9 cease to start?

[@Brian_the_repair_guy]

Explain the problem

[@drkerman11]

No poer when switch is turned on. Proceeded to take apart and started with the pressure switch that was totally broken wired to the micro switch! Have gone a little further and pulled the board and no blown caps or burnt board, visually. Got the sprayer from a relative and they said the problem is electrically!

[@Brian_the_repair_guy]

@@drkerman11 if the wire from the pressure control is broken, it will not turn on

[@drkerman11]

Do you believe I can bypass the micro switch just to test? There is no where left on the micro switch to solder.

[@Brian_the_repair_guy]

If you cut the other wire from the switch and connect them, the machine should run if all else is good, but the machine will run without stopping until you turn it off

[@cadeeands]

Thank you I will mess with my machine tomorrow.

[@HarryBoland-fu4vo]

Never recommend to switch from prime to spray under pressure. Puts so much unnecessary strain on the machine

[@Brian_the_repair_guy]

Explain how switching puts too much strain on the machine

[@donovans6472]

my 390 pc is having the same problem...so i will try this tuesday when i'm back at work....was just about to start painting and this happened

[@Brian_the_repair_guy]

I hope it helps

[@gurparveshsingh5348]

I have an issue with my graco 490 pc pro. the tips keep clogging up and i had to kept reversing the tip to unclog it. Its so annoying while spraying. I tried everything cleaned out both the filters. cleaned it out with more than 2 pails of water. The sprayer works just as new when i take out the tip. But as soon as i put it back its just start doing its plugging up thing again. But if i run the sprayer just with water it seemed to work just fine even with the tip on. The tips i was going with fflp 308, 310,312 nothing neither one of them worked . Except the RAC X 515. it just started happening. I worked with same paint the other day with fflp 308 and it worked just fine but now its just so annoying to be keep reversing the tip again again. If you could help with this it would be much much appreciated.

[@Brian_the_repair_guy]

My first though on the FFLP tips is to use the fine filters in the machine and the gun. This will catch far more trash. These are the blue filters from Graco. You may need to increase the pressure a bit. When the pressure is lowered, the machine can't push through some of the trash as easily. How old is your hose? Build up in the hose can cause excessive clogs as it breaks off.

[@gurparveshsingh5348]

@@Brian_the_repair_guy The machine is just couple of months old. I bought it at the end of the last april. Also the i have tried increasing the pressure all the way up. Filters were all cleaned up i have checked them twice a day. There was no gunk in the filters or in the hose. I tried thinning and straining down the paint as well. But its just wont work with the tips

[@gurparveshsingh5348]

@@Brian_the_repair_guy It was working just fine with the fflp 308 tip day before yesterday but the next day it just didn't work. With out tips it works like brand new. But as soon as you put the tips in its just stop working.

[@Brian_the_repair_guy]

@@gurparveshsingh5348 I would suggest the blue Graco filters if your machine is Graco or the fine filters if it is Titan. The medium or black filters do not catch enough material for an 08 tip. What product are you spraying?

[@gurparveshsingh5348]

@@Brian_the_repair_guy i was spraying exterior A-100 latex paint from sherwin-Williams

[@jondough7443]

What oil did you use?

[@Brian_the_repair_guy]

It's a blend that is mix myself.

[@Pw-f100]

You mix it yourself? What kind of answer is that??

[@NFSgamingEvo]

Mine doesn't work after instal the new pump whats next?

[@Brian_the_repair_guy]

You installed a complete new pump?

[@NFSgamingEvo]

@@Brian_the_repair_guy yes I did, original from graco

[@Brian_the_repair_guy]

@@NFSgamingEvo remove the pump hose from the back of the pump and turn on the pump on low pressure. Give it about 2 mins of running and see if water comes out of the hose fitting. When it does turn it off and reattach hose. If it does not work, hit the pump while it is pumping about 3 times, wait for water same as above

[@NFSgamingEvo]

@Brian_the_repair_guy no water , coming out! Could be the prime valve ?

[@Brian_the_repair_guy]

@@NFSgamingEvo no the prime valve is fine. You removed the hose from the back of the pump, not your pressure hose right? If you did the right hose, then the lower or upper ball is stuck. This happens with the oil in new pumps. The video shows how to remove the lower and loosen the lower and upper ball

[@MarioLopez-ds5ld]

Where’s my fuse on my lo 540 machine won’t start

[@Brian_the_repair_guy]

Do you have a Titan 540? If so not all of them have a fuse. The fuse would be inside the box with the power switch. It may be a circuit breaker under the bottom of the machine

[@WeThePeopleUnited2A]

Great videos why not spend a little time cleaning that shit outta there it seems that it would gum up that ball

[@Brian_the_repair_guy]

Residue doesn't cause a problem with the ball, dried solids are usually the issue. My videos are not specific to a full rebuild. As I state in the videos, these are the basics to get a guy back to work quickly. I try to make videos that will help a guy on the job with little knowledge, get back to work quickly and safely

[@WeThePeopleUnited2A]

@@Brian_the_repair_guy alright we’ll any how good videos

[@eligonzalez3928]

Why does my sprayer won’t stop at set pressure??

[@Brian_the_repair_guy]

Is the pressure going high or is the pressure low?

[@eligonzalez3928]

@@Brian_the_repair_guy it goes too high, even when I set it low it keeps on going it won’t stop

[@Brian_the_repair_guy]

@@eligonzalez3928 if the pressure is going to high, the transducer is most likely bad

[@eligonzalez3928]

@@Brian_the_repair_guy ok thanks yeah it’s going high and it’s only 3 months old

[@rebeccafitzgerald4768]

Legend

[@Brian_the_repair_guy]

Thank you, hope you find it helpful

[@gon107878]

Hellow. Ihave. 695ultra max. I change. The piston. But now. Idont know. Why is not. Letting me. Put it back it eont tie. 𝚍𝚘𝚗𝚝 𝚐𝚎𝚝 𝚝𝚘 𝚌𝚕𝚒𝚙

[@Brian_the_repair_guy]

I am sorry, I do not understand