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Old 03-19-2017, 03:54 PM   #1
City: San Francisco
Vessel Name: Speedy Charlotte
Vessel Model: Beneteau Swift Trawler 44
Join Date: Oct 2016
Posts: 677
Hydraulic Fluid ISO 22 vs 22.1

Hi there, I'm trying to add hydraulic fluid for my steering and ISO 22 is specified by the pump manufacturer. I'm at a store and they only have ISO 22.1. Does anyone know the difference? A web search didn't come up with much.


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Old 03-20-2017, 11:12 PM   #2
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City: Gibsons, B.C.
Vessel Name: Island Pride
Vessel Model: xxxx
Join Date: Oct 2007
Posts: 3,178
I think , don't know, the .1 is an indicator of an improvement like diesel engine oils going from CC to now CJ-4 but backward compatible in equipment that used the older oils. I've been out of it too long to 'know'.

If you really want to know then get the mfgr. name and tel number and call them. Most good oil co. have people who are willing to help, at least in my experience.

Also a lot of good hydraulic shops may know.
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