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  #11  
Old 12-30-2017, 04:45 PM
MED MED is offline
 
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Location: Aiken, SC
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Google says Royco 782 and Aeroshell 31 meet mil spec prf 83282. So, wouldn't they both be acceptable?
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  #12  
Old 01-03-2018, 12:26 PM
TS Flightlines TS Flightlines is offline
 
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Location: Ridgeland, SC
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Default What Beringer just told me--

Tom,
"Regarding the Mobil 1 ATF fluid, we have never tested it with our product; thus, we do not advise to use this fluid.
Also it seems that the Mobil 1 ATF fluid is neither part of the Mineral nor the DOT4 specifications we recommend.
Indeed we only recommend the following fluids:
For DOT4 fluid: High performance DOT4 brake fluid with dry boiling point at 440 Fahrenheit degrees minimum, as it meets the FMVSS 116/DOT4 specifications,
For Mineral fluid: High Performance following the specification MIL-PRF-87257.
Therefore we won’t advise using the Mobile 1 ATF fluid with the BERINGER brakes as we never tested it."

Guys----I asked the specific question to protect the builder/plane owner, mechanics, and Beringer, even though we dont have a dog in this fight. Even though some have used it with no issues, its the one guy that does, that has a catastrophic failure and incident that concerns me.

Tom
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  #13  
Old 01-03-2018, 05:20 PM
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Walt Walt is online now
 
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Quote:
Originally Posted by MED View Post
Google says Royco 782 and Aeroshell 31 meet mil spec prf 83282. So, wouldn't they both be acceptable?
Yes they would.
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  #14  
Old 01-07-2018, 09:26 AM
JDA_BTR JDA_BTR is offline
 
Join Date: Dec 2013
Location: Baton Rouge, LA
Posts: 497
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I found another source for the 87252. Radcolube® FR257 (MIL-PRF-87257) hydraulic fluid. It is priced right at $8 per quart in quart packaging, with a minimum to me of 24 quarts (plus shipping).
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  #15  
Old 01-09-2018, 12:22 AM
N54SG N54SG is offline
 
Join Date: Nov 2008
Location: Kansas City, MO
Posts: 93
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Quote:
Originally Posted by TS Flightlines View Post
Tom,
"Regarding the Mobil 1 ATF fluid, we have never tested it with our product; thus, we do not advise to use this fluid.
Also it seems that the Mobil 1 ATF fluid is neither part of the Mineral nor the DOT4 specifications we recommend.
Indeed we only recommend the following fluids:
For DOT4 fluid: High performance DOT4 brake fluid with dry boiling point at 440 Fahrenheit degrees minimum, as it meets the FMVSS 116/DOT4 specifications,
For Mineral fluid: High Performance following the specification MIL-PRF-87257.
Therefore we won’t advise using the Mobile 1 ATF fluid with the BERINGER brakes as we never tested it."

Guys----I asked the specific question to protect the builder/plane owner, mechanics, and Beringer, even though we dont have a dog in this fight. Even though some have used it with no issues, its the one guy that does, that has a catastrophic failure and incident that concerns me.

Tom
I think you will find this to be worth reading.

http://www.groveaircraft.com/fluid.html

Like most of us have said, Royco 782, which meets MIL-PRF-83282D, is compatible with MIL-PRF-87257. Thus, its a drop in replacement.

I can generate way more heat in my Beringer brakes than any RV can I guarantee and I have no issues at all. Or in the extreme cold (as cold as it can get in the Midwest anyway) without any noticeable changes in properties.

Put Royco 782 in it and be done.
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  #16  
Old 01-09-2018, 02:04 PM
TS Flightlines TS Flightlines is offline
 
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Location: Ridgeland, SC
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Tom,
I was repeating what Carla told me about the Beringer recommendations.
Whether the ATF worked or not wasnt my intent to debate. As Walt was stating, follow the manufacturers recommendations. WE know alot of you have successfully used it. I successfully landed a C150 one time, doesnt mean that it was done correctly.

I guess use at your own risk is a better way of saying it. NOT wanting to start a flame war here. Just passing on the information.

Tom
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Teflon Hose Assemblies for Experimentals
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RV7 Tail Kit Completed, Fuse started-Pay as I go Plan
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www.tsflightlines.com
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