Pressure washer pump rebuildable?

[dodge man]

I have a Simpson pressure washer and a couple of months ago I changed the oil in the pump and it had water contamination. I used it a couple of times changed it again and milky again. I used it a couple of more times and it looked OK through the sight glass. Two days ago I was using it and I noticed steam coming out the relief valve and noticed warm water coming out the wand.

Is this worth trying to fix, it has a Honda GX engine? Is it worth trying to rebuild the pump? A new pump is about $225 if I get one like it.

 

[alexpops]

If you can find the right o-rings/washers yes rebuild. I'm seeing various pressure washer rebuild kits for 23 bucks and another 20 bucks for valves. You just need to see which kit works for you. So for 1/10th to 1/5th the cost of a new pump, you at least have a spare ... even if you buy a new pump.

 

[RandyT]

If a pressure washer pump is allowed to run without water outflow the unloader bypass water will cause the pump to heat up. The thermal relief valve opens around 190 psi and will start dribbling water to help keep the pump from overheating. Then would you pull the trigger that hot water comes out the nozzle. Totally normal.

 

[dodge man]

That’s good to know. I definitely need to do something with it because water is in the oil again. It probably just needs o rings, seals, gaskets etc. I’ve never taken one apart so il find out.

 

[rScotty]

That’s good to know. I definitely need to do something with it because water is in the oil again. It probably just needs o rings, seals, gaskets etc. I’ve never taken one apart so il find out.

Might be easier to just buy the pump complete. The 2.8 gpm pump on my honda-powered pressure washer froze and broke the housing.
Amazon sells pressure washer pumps in the $50 range to fit most pressure washers.

On mine it took less than 15 minutes to swap the new one for the old. That was 5 years ago. New pump works better than the original ever did. A direct fit onto to the Honda driveshaft and mounts with the same 3 bolts.
rScotty

 

[flyerdan]

Since it still works, chances are it can be fixed with a reseal kit. If time allows, I think the best thing would be to take it apart, check to make sure none of the hard parts have any wallering out or erosion that can't be fixed with seals. That will also give an idea of what the correct kit should have.

 

[DK35vince]

It might be worth trying to repair it.

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[bmaverick]

I have a Simpson pressure washer and a couple of months ago I changed the oil in the pump and it had water contamination. I used it a couple of times changed it again and milky again. I used it a couple of more times and it looked OK through the sight glass. Two days ago I was using it and I noticed steam coming out the relief valve and noticed warm water coming out the wand.

Is this worth trying to fix, it has a Honda GX engine? Is it worth trying to rebuild the pump? A new pump is about $225 if I get one like it.
View attachment 1736623View attachment 1736624

I was in the same power washer trouble your are in now. Gas powered B+S on a Lowes 2600psi machine. It was LOUD running, oil would get into the pump making whatever I was washing slimy, and the nozzles at times would suddenly pop off the wand with great force randomly putting a nick or dent into whatever I was cleaning. Plus, it took GAS and OIL.

I got a Harbor Freight coupon and bought the $79 electric power washer. WHAT A DREAM. Flawless performance each time used. And you can talk normally with others around. Sure it's only 1750psi, yet I see no noticeable difference between the 2600psi gas machine and this one for cleaning. It comes down to the nozzles used.

Needless to say, the aluminum casting of the gas power washer cracked. I tried the JB Weld on the thing and finally called it the LAST STRAW. I still have the B+S engine.

 

[Mike1955]

If this is an opinion question I have one. I say get a new pump at least. Any more problems just replace the whole thing. This stuff is enough trouble to run, so I don’t work on it

 

[dodge man]

I took the pump off today and got it apart. I ordered a seal kit for it and hopefully I can figure out how to install it. I definitely had water in the oil again.

View attachment 1851020View attachment 1851021

 

[dodge man]

I got a seal kit for it and luckily found a YouTube video where he installed seals in a pump like mine. Took about and hour to do it. A picture of the old seals and the pump mostly put back together.

 

[dodge man]

It was a failure, I’m still getting water into the pump oil. When I watched the YouTube video where they showed how to rebuild them he was negative on these pumps. He said they are meant to be replaced instead of rebuilt. It does work and makes more pressure but running it just a few minutes put quite a bit of water into the oil. I’ll get a new pump for it.

 

[Mike1955]

It was a failure, I’m still getting water into the pump oil. When I watched the YouTube video where they showed how to rebuild them he was negative on these pumps. He said they are meant to be replaced instead of rebuilt. It does work and makes more pressure but running it just a few minutes put quite a bit of water into the oil. I’ll get a new pump for it.

Dodge man I felt like the odds were against you on this. But sometimes you just got too see. It’s just to much pressure in there, and the cylinders wear and you know it’s just luck if it works. Now we all know. Thanks!

 

[rScotty]

It was a failure, I’m still getting water into the pump oil. When I watched the YouTube video where they showed how to rebuild them he was negative on these pumps. He said they are meant to be replaced instead of rebuilt. It does work and makes more pressure but running it just a few minutes put quite a bit of water into the oil. I’ll get a new pump for it.

good on you for trying, and nice work. It's disappointing that some things are now made NOT to be rebuidable. That needs to change, but I think next revolution or so.
I posted here in #5 tells what I did. BTW, it's stll working, but I'd pay twice as much to buy a rebuildable pump.

 

[Mike1955]

good on you for trying, and nice work. It's disappointing that some things are now made NOT to be rebuidable. That needs to change, but I think next revolution or so.
I posted here in #5 tells what I did. BTW, it's stll working, but I'd pay twice as much to buy a rebuildable pump.

Scotty I think now is a good time to decide what if anything are we doing to short life this stuff. I always make sure I have plenty of pressure and flow for the supply. The lack of either will kill it quickly. And a good filter is a positive around here. Our water sometimes has color or oil in it. Pumps don’t do good with trashed water. Any more ideas?

 

[dodge man]

I’m not really disappointed in how long this pressure washer lasted. I’m not sure how old it is but 15 years or more. It was a “better” one at Lowe’s. One thing I couldn’t really find any info on line other than a video on how to fix it.

 

[dodge man]

I should add it may be my fault for never changing the pump oil until recently.

 

[dodge man]

I’ll resurrect this again, I got a new pump last week and installed it today. A little over $300. It’s too cold and snowy to try it but it should be as good as new.

 

[Mike1955]

Thank you for the update

 

[Mike1955]

It most likely is the same as when you bought it brand new. Probably half the expense as a new one. They say keep a good stream of clean water supplied to it for best results. And keep the trigger pulled. I seen that on UTube