morning folks

i'm having some seals made for an Eaton pump and the man is asking what fluid is being used,mineral base or esters???

i googled it and the nearest i could come up with was synthetic oil!

i think Nitrile is the correct material but it does not perform so well with esters whatever they are.

so is ATF/power steering fluid mineral or ester based?

hope there is an expert out there

many thanks

stuey

Stu, If it's synthetic it's neither. Basically it's a hydraulic oil, with some lubricating properties.

Frank/Rebop

Bristol, In ( by Elkhart) 

thanks Frank

i think i'll stick with Nitrile. the Esters he was worrying about are in fire retardent anhydrous hydraulic fluid.

crikey get a Y-block and get an education, its like being back at school.

stuey

It's like that Eh? I can't really be sure what's available in old Blighty, probably best to read the can.

Frank/Rebop

Bristol, In ( by Elkhart)