Milky Oil in Pump

the Oil in my Anno Reverbi pump is milky. What is the best way to remove the contaminated oil? and should the pump be flushed? and w/what?

Douglas Hicks
General Fire Equipment Co of Eastern Oregon, Inc
 
Douglas,

You can change the oil a couple times in a row, that will get rid of the water that is in your oil. But you need to find out how the water got in the oil.

Bad seals will only (usaully) cause low pressure or a drip between the manifold and the crankcase. It sounds like you may have a hair line crack in one of your plungers. Some AR pumps have ceramic coated plungers and the coating wears off or chips.

Robert Williamson
 
The V-Packings keep the water in the head. There are also oil seals that can go bad, and they can be replaced. You have to take off the head, and remove the plungers, then pull them out, and replace with new ones. It is not too hard of a job, but I usually end up throwing the whole pump out and spending $300 for a new one.

Scott Stone
 
I would not jump to conclusions or go buy a new pump just yet.

The white residoo in your oil is definately from water as previosly stated.
But it might not be a blown seal or packing.
Do you live anywhere where it is pretty cold out now?
If so
it could also be from
something called emulsification (like mayonaise).
Which is just condensation that got trapped inside your oil.
If you use your pressure washer for very small amounts of time in the winter this can happen.
If this is the case than
get the motor hot and it will burn off in time.
If there is a lot of that milky white stuff than I would flush it, put new oil in the machine and leave the machine INSIDE with the oil cap OFF for about 24 hours. This will give any moisture trapped inside a chance to evaperate.
 
I dunno, Rocko, is -20 cold? It was that cold here earlier this month, instead of our normal +20 temps. I did not think about the mayo effect. We did use the PW about 8 hours on Wed and Thursday. We did change oil today. My helper took the pump off and took it into the warm shop and drained the oil. I will leave the cap loose tommorrow when we go to work. If that doesn't cure the problem, we will repair the spare pump and then order parts for the A/R

Douglas Hicks
General Fire Equipment Co of Eastern Oregon, Inc
 
Douglas,
The condition that Rocko T is refering to typicaly takes place under high humidity conditions.

Based on the temps. you gave it should be very, very dry there.

I would bet that Scott's daignosis is correct.
 
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I seem to have better luck with the Comet/General pumps Then I have had with the AR.
We have never used a CAT pump but i hear good things about them. Mtngoat.
 
Milky oil is a problem will ALL pumps. All pumps have a breather and as they get hot the air in them expands out through the breather. When you switch it off the pump cools and draws in air that is normally humid. The water condenses and next time you use the pump mixes with the oil. Over time the amount of water increases and so the oil goes milky. This is normal when operating in a damp environment. There is no cure except to change the oil from time to time. (Like it says in the book!!)
 
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