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Premium Member Roof Cleaning Institute of America Certified Roof Cleaning Specialist

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Date: Apr 19, 2011
Pressure Wash Pump Question
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My pump had what I believe was oil mixed in at initial start up yesterday. It was a black nasty water for the first 5 seconds of start up. Im assuming it may be about to crap out if theres oil mixing with H2o. Its a 4 gpm Comet.

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Ed Thompson
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Hey Ed,..I've had pump seals go bad a few times over the years,..but I never had the oil go out into the water flow,..my problem was the oil in the pump was a light brown color.

Does it do it every time on startup? Or was this just the first time you started it this season? It could be the inside of the hose degrading.

Not much oil in the se little pumps Ed,..you can simply check the level and see if it's going down.

Jeff

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Raystown Roof Cleaning Central PA 1-800-236-0322 wrote:

Hey Ed,..I've had pump seals go bad a few times over the years,..but I never had the oil go out into the water flow,..my problem was the oil in the pump was a light brown color.

Does it do it every time on startup? Or was this just the first time you started it this season? It could be the inside of the hose degrading.

Not much oil in the se little pumps Ed,..you can simply check the level and see if it's going down.

Jeff


 Good point Jeff, I had a bad hose last year do something of the same thing. Got a real black run for a few seconds.

 



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Roof Cleaning New Jersey wrote:

My pump had what I believe was oil mixed in at initial start up yesterday. It was a black nasty water for the first 5 seconds of start up. Im assuming it may be about to crap out if theres oil mixing with H2o. Its a 4 gpm Comet.


Hmmmm, I have 7 pressure washing machines. I also have 1 comet pump on 1.

I've pressure washed since 1978 and owned 3 or more machines at a time since 1989.

I have had, like Jeff said, creamy oil from seals leaking water into the pump, but never oil come out with the water?

I don't think it's the pump. Doesn't it have a sight glass on the end? If not, take the oil cap off and check the oil color.

Black in the water, is always from inside the hoses-to my experience.

Chuck

 



-- Edited by Bergman Roof Cleaning Port Charlotte FL 941-698-1959 on Tuesday 19th of April 2011 07:53:05 AM

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Oil cannot get into the water. The oil is not pressurized, the water is. Chlorine corrosion on some metals is black.

And Chuck, no matter the color of the outer jacket, the inner liner of all pressure hoses is black.

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Russ Johnson
Southside Equipment, Inc
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It happened to me yesterday on a truck that my guys use and they said it happened to them before also. I pulled the trigger to rinse some light colored stucco. My heart dropped when blackness ran from the gutter down. It was quite a bit of black water. A good 4 or 5 seconds worth of black on black.

I would say this machine has about 75 hours on it for 2011.  This is the first time I seen it and my guy said its happened before.  I didnt have time to address it at the moment and since it cleared up I just let it alone.



-- Edited by Roof Cleaning New Jersey on Tuesday 19th of April 2011 07:53:17 AM

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Southside Equipment wrote:

Oil cannot get into the water. The oil is not pressurized, the water is. Chlorine corrosion on some metals is black.

And Chuck, no matter the color of the outer jacket, the inner liner of all pressure hoses is black.


Well, you learn something new every day! biggrin

I never looked inside a hose to see! confuse

All the more reason to believe the black water he is seeing is from inside the hose.

I have especially noticed, the next time I used them. that when I have injected a degreaser through the hoses, black comes out-or if they have been sitting on a shelf for a long time and got dried up-I guess?

Chuck

 



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Now that I think of it the guys arent rinsing out the pumps and hoses like i told them. Considering it was 5 seconds or so would indicate the amount of time it takes to push 200' of blackness from the hose. Nice investigatory work guys. Thanks

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Date: Apr 19, 2011
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Southside Equipment wrote:

Oil cannot get into the water. The oil is not pressurized, the water is. Chlorine corrosion on some metals is black.

And Chuck, no matter the color of the outer jacket, the inner liner of all pressure hoses is black.


 138394, Happens to me from time to time if I have been doing a bunch of DS'ing and forget to rinse out the hoses. Nothing to worry about.

 



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