This is a really interesting topic as it always is... and I am always checking stuff out on the internet. One of the things I looked at on the Deere site that Eugene pointed to was the specs for CaseIH
[url=http://www.deere.com/en_US/parts/partsinfo/oils_and_lubricants/oil_hydraulic.html:qxkjchwu said:
Hy-Gard™ Hydraulic/Transmission Oil[/url]":qxkjchwu]
CNH
Case, Case-IH: MS-1207, MS-1209,
MS-1210, MS-1
Appears that MS-1210 is a CaseIH standard which kind of surprised me, so I googled
MS-1209 Specifications Hydraulic Fluids and found a few interesting tidbits:
AMSOIL Synthetic Tractor Hydraulic/Transmission Oil - scroll down and check
Specifications
UTF Hydraulic Tractor Fluid - scroll down and check
Specifications
Valvoline Unitrac Fluid
Kubota® Super UDT Fluid Messicks :?:
Case Akcela TCH Hydraulic Fluid,
Case Akcela HyTran Ultra Tractor Fluid
I have a call into my local east coast refiner - Irving Oil and their COASTAL Blending & Packaging to find out how their products stack up against Hy-Tran/Hy-Tran Ultra.
One thing I noticed is that many of these fluids are brownish in colour similar to the base oils, whereas Hy-Tran, Hy-Tran Ultra and Permatran are pinkish-red (both products are almost indistinguishable from each other). I think Hy-Gard is also the same. I would lean toward these as they probably are emulsifiers.
As I said, kinda interesting material.