UPDATE:1 year and still cranks within the first 2-3 pulls. Probably will buy another when this one finally does bite the dust ruclips.net/user/postUgkx43QMbQqu67IZadu9ou8Sg1BdrunMRNqX . No issues at all. Very happy with it.UPDATE: After 6 months of use and over 70 uses I would still highly recommend this pressure washer. It does vibrate a decent amount but never had it “walk” like others have mentioned. No oil leaks, still seems to run like the day I bought it. Still cranks within 2-3 pulls every time. Very happy with my purchase!Have used it about a dozen times now. Plenty of power, cranks up on 1-2 pulls every time. My only complaint would be I wish it was a little taller to make it easier to walk with it (hits my ankles a lot) and that the two hose connections were a little further apart but it hasn’t caused me any issues. Seems to run a good 1-1/2-2 hrs on a full tank, overall a well built machine and definitely worth the money in my opinion.
James…..damn great video, like others who commented, you saved me some serious coin and time. On my DEWALT it was the unloader. The valve (pin) was stuck and would not move in and out. I took it apart and cleaned and lubricant it. WAM BAM thank you MAN! This has been an outstanding power washer for over 10 years. You DA MAN…… PC
My Dewalt 3625 is about a year old. It sat (No gas in the carb) for a good 6 months until I got it out today. Started right up, but no pressure when the trigger was pulled. Started looking and found this vid. Turns out that the easiest thing to do WAS the culprit. I just unscrewed the unloader, and it was stuck for sure. (with a little corrosion in there too. WTF Dewalt?) I lubed it up, exercised the plunger until it was free and fun - then put it back in the cantankerous beastie. Started it again and viola! Pressure was perfect once again! Thanks James!
Glad the video helped. Pretty much all unloaders get stuck on pumps no matter what brand it is...The best thing is to make sure it's lubbed up with a lot of lithium grease. Usually if I'm not going to use my pressure washer for over 2 months I'll blow the pump out or use pump saver. Pump saver will really help stop corrosion in the unloader. For winter storage pump saver is a must!!!
Thanks for this video man 🫡 I have a 0 pressure problem also. Took the pump off, changed oil, cleaned shaft/key put back together and nothin. Gonna go through it just like you did and see what’s what. Definitely gonna take the unloaded off and see if that does it.
thanks for the wonderful and instructive video --I recently bought a machine and I didn't know how to set it up and where to get good pressure --thanks a lot
Excellent video. I have the same pump, however, the other day while I was using it, when I used the spray handle I noticed that the pressure dropped off significantly. when I looked at the pump the water was spraying out of the 3 holes centered on the pump where it attached to the drive unit. All of the pump allen screws were torqued ok. Any ideas? I'm hoping it's not the seals.
You said the valves looked okay, looking down the hole. That doesn't really tell you anything though. You need to remove the valves and check them for proper seating. Out of 6 valves, it only takes 1 not seating to kill the pressure. The last two I repaired, both had a single bad valve mucking up the whole shabang. If the heat gets too high in the pump, the retaining plastic cage will distort and prevent the valve from seating. If you blow on the metal side of the valve, no air should make it through. (Even though the water flows this way, it has to be under enough pressure to open the valve) Making sure the valve is seated and air tight is what you want. Sometimes the spring will just bind up and you can free it back up with a pick tool. If there's no oil or water leaking, then it's almost always going to be a valve not closing tight (this includes the unloader valve, as well)
You're right, I've had unit after this with only 1 broken valve and it couldn't build pressure. on the cheap pumps I usually fill the cavity with water and see if it leaks down. When I say cheap pumps I mean vertical shaft ones and any big box style unit. I've had bad luck trying to pull the valves and then breaking them. I've had good luck getting MiTM valves out. Sometimes it's really hard to tell w/o removing them are they damaged. That unit was a few years ago and I can't remember much about it but thanks for watching.
I have a brand new pump GP 4000 psi 4 gallons a minute that I bought last year and I finally took it out of the box this past Saturday I put it on a brand new GX 390 Honda motor and I started it and I had no pressure at all I do have really good water flow but no pressure do you have an idea what might be the issue
Did you make sure the key is in the shaft? sometimes it gets pushed out... if it's correct I'd check the setting of the unloader. I believe most pumps ship with the unloader out and you need to tighten them in to increase the pressure.
I have a Simpson Professional Pressure Washer 3300 PSI 2.5 GPM (PS60841) with an AAA 53ALD24 pump that has no pressure. Per your video (great video by the way) I took off the pump and the key appeared to be out of place. Put it back together and nothing. I then pulled off the manifold and the values are nasty dirty. I then drained the oil and there’s a small amount of water in the oil (slightly milky). I’m thinking of just replacing the pump, manifold and all accessories. Where would you suggest buying from? Thanks for your help in advance.
The best pumps are CAT but if you're a homeowner I don't think it's necessary. I've had some really great AR pumps and had some great Canpump. They reached out and sent me a few pumps for free. Canpump and MITM are the same if my memory serves me right. Most issues I've seen are with people not taking care of the pump. I think I had one or two pumps that actually were worn out because the units were heavily used. Cost wise I think Canpump are pretty much the best value, if I didn't care about cost I'd go with Cat and then with AR. I'm not a big fan of AAA pumps but as long as you take care of them the pump should last for many years.
@@jamesbubnick Thanks for the reply. Yes, I'm a homeowner but I'm not sure how to match the other name brand pumps with my AAA. What the best way for me to cross reference? Thanks again for your help and I'm loving your videos.
That means you have contaminated oil...could be the seals are shot or could be it just is contaminated. I'd change the oil and then see if it turns gray/milky or stays like oil.
I have one of those Simpson powershot pressure washers rated at 3300 psi. Builds pressure, but once i start spraying the pressure goes from 3300 to 1200psi. Is that normal ?
Probably not normal. Pumps don't really operate at their stated pressure. Most seem to be overrated by a few hundred PSI. If it drops that much it sounds like a valve is damaged, wrong sized tip, or misadjusted unloader. If you replaced the tips with "universal tips" that could cause the issue. You need to size the tip orifice to the PSI and GPM of the pump. Also could be the unloader needs adjustment
hello James great video, maybe you can help me. i have a dewalt 3600 psi 2.5 gpm and bought it new from home depot like 2 years ago, i used it like 3-4 times and worked well and then i stopped using it for a year and i wanted to use it a few days ago and there was no pressure , i took it to the mechanic and he said the unloader was fine and couldnt fix it. its a triple AAA plunger pump i think. i was thinking in spraying wd-40 inside the pump , and i also have a can of pump saver, i dont know if i put that and let it rest maybe it will lubricate everything again. what do you think
That won't hurt the pump but probably won't help either. It's usually the unloader is bad or the valves have at least one damaged/broken out of the 6 and then it wouldn't build continuous pressure. The AAA pump that comes on those are just soso. It's probably cheapest to order a CanPump replacement and switch it. I've had a few pumps from CanPump as replacements and if I remember correctly they are the same mfg as MITM pumps.
I don't believe they make a rebuild kit. You can buy a new unloader. Typically if you disassemble, clean on a wire wheel, lubricate they will come back but if the O-rings are leaking you'd be hard pressed to find the correct sized ones.
haha...I agree...so I just bought the 12v DeWalt set, impact drivers, etc...and have been using it and love it. The size, weight, battery life is perfect for this sorta stuff. Only thing is when reassembling things...especially into aluminum I like to do it by had because it's so easy to over torque and strip out fasteners. Also I like to start fasteners by hand to make sure I'm not cross threading anything. And one more thing is I've noticed if I'm reassembling a steel bolt into aluminum sometimes I'll run the bolt through a tap to clean the threads as aluminum transfers easily especially if I'm replacing the old aluminum piece. I swear the hardest thing to not crossthread is some spark plugs. If the plug is used and the threads have carbon on them...uhhhhhh
The best way to adjust your GPM flow is with your tip orifice size. That's why professional detailers use a 5.0+ orifice tip on their electric pressure washers, they're trying to dry the PSI and increase the GPM flow...... It depends on how you adjust it, ie unloader or switch orifice size of your tip.
The high pressure seals on this one did not fail. The unloader was sticking. On the similar pump that failed 5 hours after I rebuilt it the pump pistons must have had damage/scratches that caused the seals to fail. The pressure on the seals is high so the littlest imperfection will cause a failure.
@@jamesbubnick did you try and replace the oil seals for the Second time on the other machine? I’m debating wether I should replace mine since it was very hard for you in the other video to remove them.
@@blanco1231000 I did not. If it’s a well used machine I’d probably do a pump oil change and run it till the pump blows the. Replace it with either a CanPump or MitM…for the cost and life those are really good.
@@jamesbubnick thanks for the reply!!! I ended up changing just the high pressure seals on the dewalt because the oil seals didn’t look bad and I didn’t see Water in the oil also I know they are a headache to remove. Good thing you showed how to insert the seals. Helped out a lot.
Sounds like the valves are damaged. Usually a pump has 6 of them and if some work it will build pressure but can’t maintain pressure once you release the trigger.
UPDATE:1 year and still cranks within the first 2-3 pulls. Probably will buy another when this one finally does bite the dust ruclips.net/user/postUgkx43QMbQqu67IZadu9ou8Sg1BdrunMRNqX . No issues at all. Very happy with it.UPDATE: After 6 months of use and over 70 uses I would still highly recommend this pressure washer. It does vibrate a decent amount but never had it “walk” like others have mentioned. No oil leaks, still seems to run like the day I bought it. Still cranks within 2-3 pulls every time. Very happy with my purchase!Have used it about a dozen times now. Plenty of power, cranks up on 1-2 pulls every time. My only complaint would be I wish it was a little taller to make it easier to walk with it (hits my ankles a lot) and that the two hose connections were a little further apart but it hasn’t caused me any issues. Seems to run a good 1-1/2-2 hrs on a full tank, overall a well built machine and definitely worth the money in my opinion.
Glad to help.
Dude you just saved me a ton of hassle. Thank you for this awesome video.
Great video, now I know why pressure was so so, will tighten up unloader, thanks!
James…..damn great video, like others who commented, you saved me some serious coin and time. On my DEWALT it was the unloader. The valve (pin) was stuck and would not move in and out. I took it apart and cleaned and lubricant it. WAM BAM thank you MAN! This has been an outstanding power washer for over 10 years. You DA MAN…… PC
Glad I could help
What did you lubricate it with?
@@clementmcnaney6787 lithium grease
My Dewalt 3625 is about a year old. It sat (No gas in the carb) for a good 6 months until I got it out today. Started right up, but no pressure when the trigger was pulled.
Started looking and found this vid. Turns out that the easiest thing to do WAS the culprit. I just unscrewed the unloader, and it was stuck for sure. (with a little corrosion in there too. WTF Dewalt?)
I lubed it up, exercised the plunger until it was free and fun - then put it back in the cantankerous beastie. Started it again and viola! Pressure was perfect once again!
Thanks James!
Glad the video helped. Pretty much all unloaders get stuck on pumps no matter what brand it is...The best thing is to make sure it's lubbed up with a lot of lithium grease. Usually if I'm not going to use my pressure washer for over 2 months I'll blow the pump out or use pump saver. Pump saver will really help stop corrosion in the unloader. For winter storage pump saver is a must!!!
My issue was the unloaded valve
Thanks for sharing! 🙂👍
I think that's what's wrong with mine. Thank you now I know what to do to check it out.
Thanks for this video man 🫡
I have a 0 pressure problem also. Took the pump off, changed oil, cleaned shaft/key put back together and nothin. Gonna go through it just like you did and see what’s what.
Definitely gonna take the unloaded off and see if that does it.
you fix it ?
Nice diagnosis
thanks for the wonderful and instructive video --I recently bought a machine and I didn't know how to set it up and where to get good pressure --thanks a lot
From Saudi Arabia, thanks A LOT buddy.
Your welcome
I bought a Simpson 4000 psi AAA pump the adjustment for pressure knob won’t turn?
There's a metal ball at the point where the unlaoder pin sits inside the housing.what is it's purpose?
Excellent video. I have the same pump, however, the other day while I was using it, when I used the spray handle I noticed that the pressure dropped off significantly. when I looked at the pump the water was spraying out of the 3 holes centered on the pump where it attached to the drive unit. All of the pump allen screws were torqued ok. Any ideas? I'm hoping it's not the seals.
You said the valves looked okay, looking down the hole. That doesn't really tell you anything though. You need to remove the valves and check them for proper seating. Out of 6 valves, it only takes 1 not seating to kill the pressure. The last two I repaired, both had a single bad valve mucking up the whole shabang. If the heat gets too high in the pump, the retaining plastic cage will distort and prevent the valve from seating. If you blow on the metal side of the valve, no air should make it through. (Even though the water flows this way, it has to be under enough pressure to open the valve) Making sure the valve is seated and air tight is what you want. Sometimes the spring will just bind up and you can free it back up with a pick tool. If there's no oil or water leaking, then it's almost always going to be a valve not closing tight (this includes the unloader valve, as well)
You're right, I've had unit after this with only 1 broken valve and it couldn't build pressure. on the cheap pumps I usually fill the cavity with water and see if it leaks down. When I say cheap pumps I mean vertical shaft ones and any big box style unit. I've had bad luck trying to pull the valves and then breaking them. I've had good luck getting MiTM valves out. Sometimes it's really hard to tell w/o removing them are they damaged.
That unit was a few years ago and I can't remember much about it but thanks for watching.
Thank alot bro
Happy to help
Just for information sake you should for example if you take off a wobble plate pump you should say the type for reference to those doing research. 👍
I have exactly the same pressure washer
And wonder if you can send a link were can I order Repair kit for the punp?
I have a brand new pump GP 4000 psi 4 gallons a minute that I bought last year and I finally took it out of the box this past Saturday I put it on a brand new GX 390 Honda motor and I started it and I had no pressure at all I do have really good water flow but no pressure do you have an idea what might be the issue
Did you make sure the key is in the shaft? sometimes it gets pushed out... if it's correct I'd check the setting of the unloader. I believe most pumps ship with the unloader out and you need to tighten them in to increase the pressure.
If you run a pressure washer once for 10 seconds dry will that kill the pump?
Nah...it's not good for it and if you do that often you'll damage the seals but doing it every now and then by accident won't kill it.
I have a Simpson Professional Pressure Washer 3300 PSI 2.5 GPM (PS60841) with an AAA 53ALD24 pump that has no pressure. Per your video (great video by the way) I took off the pump and the key appeared to be out of place. Put it back together and nothing. I then pulled off the manifold and the values are nasty dirty. I then drained the oil and there’s a small amount of water in the oil (slightly milky). I’m thinking of just replacing the pump, manifold and all accessories. Where would you suggest buying from? Thanks for your help in advance.
The best pumps are CAT but if you're a homeowner I don't think it's necessary. I've had some really great AR pumps and had some great Canpump. They reached out and sent me a few pumps for free. Canpump and MITM are the same if my memory serves me right. Most issues I've seen are with people not taking care of the pump. I think I had one or two pumps that actually were worn out because the units were heavily used. Cost wise I think Canpump are pretty much the best value, if I didn't care about cost I'd go with Cat and then with AR. I'm not a big fan of AAA pumps but as long as you take care of them the pump should last for many years.
@@jamesbubnick Thanks for the reply. Yes, I'm a homeowner but I'm not sure how to match the other name brand pumps with my AAA. What the best way for me to cross reference? Thanks again for your help and I'm loving your videos.
I heard you talk about oil colour.
My oil colour in the pump is not like any regular oil. It’s like a grey paint.
That means you have contaminated oil...could be the seals are shot or could be it just is contaminated. I'd change the oil and then see if it turns gray/milky or stays like oil.
@@jamesbubnick If the seals are shot and water is getting in the pump I’m assuming that would affect my pressure?
@@rotaxrider No...so those seals only effect the oil, the high pressure seals are in the head of the pump and those are seperate service kits.
I have one of those Simpson powershot pressure washers rated at 3300 psi. Builds pressure, but once i start spraying the pressure goes from 3300 to 1200psi. Is that normal ?
Probably not normal. Pumps don't really operate at their stated pressure. Most seem to be overrated by a few hundred PSI. If it drops that much it sounds like a valve is damaged, wrong sized tip, or misadjusted unloader. If you replaced the tips with "universal tips" that could cause the issue. You need to size the tip orifice to the PSI and GPM of the pump. Also could be the unloader needs adjustment
@@jamesbubnick thank you so much 😫
I'm using a similar pressure washer for the first time brand new. The unloader pin is not stuck. I've tried adjusting it. Nothing works
Did you start the motor up without water when you got it? If so the pump has been destroyed
@@jamesbubnick no, I took the pump off. The key didn't get put in correctly apparantly. Thanks
@@anthonybyrd6591 Ah I gotcha, if you put it in right you should be ok. :)
I have a 4000 psi simpson pressure washer with no pressure, I tried everything to fix it but nothing
It's usually either seals/valves/unloader or the key. Sometimes the valves are damaged but it's really hard to tell without removing them.
hello James great video, maybe you can help me. i have a dewalt 3600 psi 2.5 gpm and bought it new from home depot like 2 years ago, i used it like 3-4 times and worked well and then i stopped using it for a year and i wanted to use it a few days ago and there was no pressure , i took it to the mechanic and he said the unloader was fine and couldnt fix it. its a triple AAA plunger pump i think. i was thinking in spraying wd-40 inside the pump , and i also have a can of pump saver, i dont know if i put that and let it rest maybe it will lubricate everything again. what do you think
That won't hurt the pump but probably won't help either. It's usually the unloader is bad or the valves have at least one damaged/broken out of the 6 and then it wouldn't build continuous pressure. The AAA pump that comes on those are just soso. It's probably cheapest to order a CanPump replacement and switch it. I've had a few pumps from CanPump as replacements and if I remember correctly they are the same mfg as MITM pumps.
Does the unloader have a rebuild kit i have same unit as video
I don't believe they make a rebuild kit. You can buy a new unloader. Typically if you disassemble, clean on a wire wheel, lubricate they will come back but if the O-rings are leaking you'd be hard pressed to find the correct sized ones.
I loved your ORIENTATION 👍👍👍👍😍😍😍😻😻😻BUT YOU COULD HAVE USED SOME BASIC POWER TOOL ,YOU DID OLD FASION WAY,BUT THERE IS NOTHING WORNG WITH IT
haha...I agree...so I just bought the 12v DeWalt set, impact drivers, etc...and have been using it and love it. The size, weight, battery life is perfect for this sorta stuff. Only thing is when reassembling things...especially into aluminum I like to do it by had because it's so easy to over torque and strip out fasteners. Also I like to start fasteners by hand to make sure I'm not cross threading anything. And one more thing is I've noticed if I'm reassembling a steel bolt into aluminum sometimes I'll run the bolt through a tap to clean the threads as aluminum transfers easily especially if I'm replacing the old aluminum piece. I swear the hardest thing to not crossthread is some spark plugs. If the plug is used and the threads have carbon on them...uhhhhhh
If you adjust the psi, does that mean the GPM will got down too?
The best way to adjust your GPM flow is with your tip orifice size. That's why professional detailers use a 5.0+ orifice tip on their electric pressure washers, they're trying to dry the PSI and increase the GPM flow......
It depends on how you adjust it, ie unloader or switch orifice size of your tip.
Why did your "high pressure seals fail so fast"?
The high pressure seals on this one did not fail. The unloader was sticking. On the similar pump that failed 5 hours after I rebuilt it the pump pistons must have had damage/scratches that caused the seals to fail. The pressure on the seals is high so the littlest imperfection will cause a failure.
@@jamesbubnick did you try and replace the oil seals for the Second time on the other machine? I’m debating wether I should replace mine since it was very hard for you in the other video to remove them.
@@blanco1231000 I did not. If it’s a well used machine I’d probably do a pump oil change and run it till the pump blows the. Replace it with either a CanPump or MitM…for the cost and life those are really good.
@@jamesbubnick thanks for the reply!!! I ended up changing just the high pressure seals on the dewalt because the oil seals didn’t look bad and I didn’t see Water in the oil also I know they are a headache to remove. Good thing you showed how to insert the seals. Helped out a lot.
Mine has good pressure for 1 second then dies down. Any suggestions? Thanks in advance
Sounds like the valves are damaged. Usually a pump has 6 of them and if some work it will
build pressure but can’t maintain pressure once you release the trigger.
@@jamesbubnick ok thanks
1000+ spike pressure???? something wrong there!
What! What did I just watch? How to troubleshoot? I'm more confused than ever after watching your video!
Those AAA pumps are garbage. I am looking to replace my pump on my Simpson 3300 PSI
You might want to try a Canpump, for a budget pump they seem to be pretty good and as far as I know are the same at MITM
Ok lol
Sir, please stop tightening that unloader. It is fixed.