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  #1  
Old 10-16-2011, 03:32 PM
maverick_935 maverick_935 is offline
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fisher oil

For those of you who use fisher oil have you ever had the oil filter plug up with some kind of slime. It plugs the filter so much that the hydraulics wont work. I put in transmission fluid trying to help it because I have never had a problem with tranny fluid in any other pump system before.

Any thoughts?
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  #2  
Old 10-16-2011, 05:41 PM
06Sierra 06Sierra is offline
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From what I have read, you are looking for problems by using trans fluid. Try putting a few ounces of Sea Foam Trans Tune in the fluid. That will clean out any build up in the system. Run it for a little while, so it has time to get through the system good. Drain, change the filter and fill with fisher fliud. I'd be concerned with the fact that you are having that issue! How is this getting into the system?? Is it just old fluid?
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  #3  
Old 10-16-2011, 08:30 PM
Roadrashron Roadrashron is offline
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My local dealer told me they fill all of the new plows with ATF. They only stock Fisher fluid for the people that like paying for a name...
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  #4  
Old 10-16-2011, 10:02 PM
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chevyzrule810 chevyzrule810 is offline
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Fisher fluid is just ATF in a container with a fisher label
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  #5  
Old 10-16-2011, 10:06 PM
neplow neplow is offline
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thats strange. you pour them out side by side they dont look the same..


Did you know the filters are meant to be changed periodically?
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  #6  
Old 10-16-2011, 10:46 PM
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i have run trans fluid for yrs in all my plows and never had any problems
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  #7  
Old 10-17-2011, 03:34 PM
maverick_935 maverick_935 is offline
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I have run various size plows and manufacturers for years but I have never seen this king of goo or sludge or whatever it is. The fluid was changed 9 months ago with the same problem. The fluid was really thick and sticky. WE cleaned out the filter but tranny fluid in and it is fine.

I was just wondering if anyone can explain this or has seen it before.
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  #8  
Old 10-17-2011, 03:48 PM
Raconteur Raconteur is offline
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The slime is from having excessive moisture entering the system . Fisher Fluid is not the same as ATF
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  #9  
Old 10-17-2011, 03:50 PM
Raconteur Raconteur is offline
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Quote:
Originally Posted by chevyzrule810 View Post
Fisher fluid is just ATF in a container with a fisher label
No it isnt .
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  #10  
Old 10-17-2011, 03:52 PM
Raconteur Raconteur is offline
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Quote:
Originally Posted by Roadrashron View Post
My local dealer told me they fill all of the new plows with ATF. They only stock Fisher fluid for the people that like paying for a name...
Do they carry the warranty after they void Fishers ?
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  #11  
Old 10-17-2011, 06:03 PM
maverick_935 maverick_935 is offline
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I thought the system was closed, how does excessive moisture enter? This is only 9 months and most of it was sitting for the summer. was only used plowing for 2 months. the slime was not normal.
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  #12  
Old 10-17-2011, 06:10 PM
nepatsfan nepatsfan is offline
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Quote:
Originally Posted by Raconteur View Post
No it isnt .
what is the difference besides the color?
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  #13  
Old 10-17-2011, 06:30 PM
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JCByrd24 JCByrd24 is offline
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Quote:
Originally Posted by nepatsfan View Post
what is the difference besides the color?
Fisher and other plow oils are aviation hydraulic fluid, designed for extreme cold temps. I have previously found the viscosity data of regular ATF and compared it to a plow oil. At 32deg and 0deg the plow oil is significantly thinner. I was a non-believer until I ran it in my meyer e47 for the first time, it was literally twice as fast below 20 degress, and would actually move right away, rather than having to angle back and forth several times in neutral reving to 2000rpms to get the oil warm enough to operate normally. The plow oil also greatly reduces amp draw and head light dimming.

A plow hydraulic system in theory is closed, but it is not a perfect world. Your rams are most likely covered in snow and ice and when retracted some of that water gets into the system, especially if there are any pits in your chrome.

As an aside, ATF is fine for underhood systems because of increased temps and power of the belt driven pump. Plow oil should not be used under hood because of lower flash point.
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  #14  
Old 10-17-2011, 07:07 PM
nepatsfan nepatsfan is offline
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Quote:
Originally Posted by JCByrd24 View Post
Fisher and other plow oils are aviation hydraulic fluid, designed for extreme cold temps. I have previously found the viscosity data of regular ATF and compared it to a plow oil. At 32deg and 0deg the plow oil is significantly thinner. I was a non-believer until I ran it in my meyer e47 for the first time, it was literally twice as fast below 20 degress, and would actually move right away, rather than having to angle back and forth several times in neutral reving to 2000rpms to get the oil warm enough to operate normally. The plow oil also greatly reduces amp draw and head light dimming.

A plow hydraulic system in theory is closed, but it is not a perfect world. Your rams are most likely covered in snow and ice and when retracted some of that water gets into the system, especially if there are any pits in your chrome.

As an aside, ATF is fine for underhood systems because of increased temps and power of the belt driven pump. Plow oil should not be used under hood because of lower flash point.
Good to know. I am not real mechanical and someone told me before that the fisher was better and I always spend a fortune on it for the plows. I am going to stick with it.
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  #15  
Old 10-18-2011, 07:59 AM
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Arc Burn Arc Burn is offline
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Quote:
Originally Posted by maverick_935 View Post
I thought the system was closed, how does excessive moisture enter? This is only 9 months and most of it was sitting for the summer. was only used plowing for 2 months. the slime was not normal.
Your resivoir is metal,if you look at the fill level,it is never really "full",there is around 2 inches at the top that is empty,warm days and cool nights breed condensation in that area and that is how moisture gets in your "closed" system,you'll notice you will usually have rust on that area of the resivoir as well when you take it off.So basically your sludge is a combo of moisture,rust and fluid.
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  #16  
Old 10-19-2011, 08:35 PM
Snow Commandor Snow Commandor is offline
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I've used red ATF for years without any problems. I do however believe plow flued will work better in extremely low tempts, due to it's lower viscosity.
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  #17  
Old 10-20-2011, 06:25 AM
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Quote:
Originally Posted by Raconteur View Post
No it isnt .
Thank goodness...a voice of reason. The Fisher oil is superior to ATF in a low temperature situation. Listen guys, don't cheap out on the fluid. It just isn't worth it.
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  #18  
Old 10-20-2011, 03:22 PM
maverick_935 maverick_935 is offline
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apparently the vent was an issue in some of the pump and needs to be replaced with a newer version. I will try that and if it happens again I will go to trans fluid and not look back..
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  #19  
Old 10-20-2011, 03:24 PM
Raconteur Raconteur is offline
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Quote:
Originally Posted by maverick_935 View Post
apparently the vent was an issue in some of the pump and needs to be replaced with a newer version. I will try that and if it happens again I will go to trans fluid and not look back..
Sounds like you have found the problem .
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  #20  
Old 10-20-2011, 03:27 PM
06Sierra 06Sierra is offline
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There is a new vent. I still have the old style, that came on the plow, and have never had a problem. Try a couple ounces of Trans Tune as well.
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