hyd. operating temperature

[Wayne County Hose]

J_J,

The isoprppyl will help to dissipate the water. This is a common practice in snowplow units that almost never get up to temperature. We also used to do it in freezer forklifts that never see hydraulic oil temps over 50 degrees, some of them never get above freezing.

 

[Reg]

I think that some amount of the work energy is converted to heat energy in the process of pumping, also there is a form of fluid friction in the hoses, which also creates heat. These are the primary sources of the heat when just running, not lifting or moving cylinders.
I think the only things you can do about it is to increase the reservoir size and increase the diameter of the hoses, maybe add a supplemental oil cooler.

Somewhere there is a rule about reservoir size vs pump capacity, not sure but it might be 1 gallon of reservoir size for every gallon per minute of pump output ?

 

[Reg]

J_J,

The isoprppyl will help to dissipate the water. This is a common practice in snowplow units that almost never get up to temperature. We also used to do it in freezer forklifts that never see hydraulic oil temps over 50 degrees, some of them never get above freezing.

I'm guessing this is to prevent the water from separating out, sinking to the bottom, freezing and blocking the pick-up ?
If so, it sounds like a good idea, but the problem of how to get it OUT becomes harder.

Ummm, forklifts that never get above freezing probably don't get water (as condensate) in their hydraulic systems anyway ?

 

[J_J]

Curious minds want to know.

Here is some technical data for those interested in the compatibility of certain fluids to different o-ring material. This data is relative to us because of the chemicals that we use, or add in hydraulic fluids. Although the misuse of certain fluids in our tractors might not be catastrophic, it has caused plane crashes because the o-rings disintegrated.

I could not find anything about adding isopropyl to hydraulic fluid for water absorption. Isopropyl is used in gas to absorb water because it does mix to some degree and then is burned . You might get away with adding it to hydraulic fluid for a while, but you are modifying the hydraulic fluid, perhaps changing the viscosity. How do you even know how much to add?

I am still looking for data to support the use of isopropyl in hydraulic fluid.

http://www.efunda.com/designstandards/oring/oring_chemical.cfm?SM=none&SC=Denatured Alcohol#mat

Sorry about that, it appears that you can't get on the site until you join. Somehow, I got on there and read the data about o-rings and fluid compatibility.

 

[Reg]

Curious minds want to know.

Here is some technical data for those interested in the compatibility of certain fluids to different o-ring material. This data is relative to us because of the chemicals that we use, or add in hydraulic fluids. Although the misuse of certain fluids in our tractors might not be catastrophic, it has caused plane crashes because the o-rings disintegrated.

I could not find anything about adding isopropyl to hydraulic fluid for water absorption. Isopropyl is used in gas to absorb water because it does mix to some degree and then is burned . You might get away with adding it to hydraulic fluid for a while, but you are modifying the hydraulic fluid, perhaps changing the viscosity. How do you even know how much to add?

I am still looking for data to support the use of isopropyl in hydraulic fluid.

eFunda: O-Ring Materials Compatibile with Chemical Denatured Alcohol

Well, its kinda tough to GET alcohol that doesn't have a significant amount of water in it anyway.
So I would want to know how much more it could absorb - like; MORE than what I would be adding ?

 

[J_J]

How about a Water Magnet. Sounds like an interesting concept.

Water from fuel tanks by selective absorption.

 

[Wayne County Hose]

Ummm, forklifts that never get above freezing probably don't get water (as condensate) in their hydraulic systems anyway ?

Even snow evaporates, just at a slower rate than water.

For o-ring/chemical compatability www.herculesus.com

 

[KML]

Well, its kinda tough to GET alcohol that doesn't have a significant amount of water in it anyway.
So I would want to know how much more it could absorb - like; MORE than what I would be adding ?

Just thought I'd share something I stumbled onto a few years ago completely by chance.

It is hard to find but 99.9% pure isopropyl alcohol is readily available almost everywhere. It's just not advertized or even out sitting on the shelf. Almost every full service pharmacy has it for compounding medicines. If you ask the pharmacist they'll usually be happy to sell you some. It's not cheap, last time I bought it it was $6 for 10 OZ.

I do, however, have nothing to add to whether or not it should be put in hydraulic fluid.....

 

[J_J]

Another piece of info from an expert.

Water Contamination of Hydraulic Fluid

 

[Wayne County Hose]

Another piece of info from an expert.

Water Contamination of Hydraulic Fluid

Ah yes, I've read the writings of the self-proclaimed king of internet hydraulics. By the book, he is usually correct. Unfortunately, I haven't found a machine working in a book yet.