Low vis vs. Hygard

[greg_g]

Seems you didn't bother to follow those links I posted.
"PMB10102: For commercial and consumer applications, the temperature range for Low-Viscosity Hy-Gard is 40ｰF (-40ｰC) to 122ｰF (50ｰC)
*Check the operator’s manual for specific applications. Some applications are restricted in this temperature range".

Note the "*". Since your manual has a different chart - and assuming it's not unusual for temperatures in your area to exceed 68F - you apparently have a tractor that should use the thicker HyGard.

//greg//

 

[ducks13]

Greg,

I followed the link and didn't find the chart, that is why I asked. I took another look, still no chart. This one seems to come up missing some illustrations, not sure why.

https://jdparts.deere.com/partsmkt/document/english/pmac/4968_fb_HyGardsTransmissionHydraulic.htm

 

[greg_g]

This one seems to come up missing some illustrations, not sure why.https://jdparts.deere.com/partsmkt/document/english/pmac/4968_fb_HyGardsTransmissionHydraulic.htm

It's there, same diagram that I posted above. You've just got something set wrong in your browser.


//greg//

 

[Rob-D]

I just changed my hydro here in the Catskills where the temp goes from well below zero to the mid 90's. The chart in my 3320 shows low vis. Hy-Gard from -40 to over 100F for the tranny and front axle.
What I think is creating some confusion with the different charts is that Deere changes emulsions but still calls it "Hy-Gard".
Anyway, I've been using lo viscosity HG for years and will continue to do so.

I did run Amsoil in my first tractor but, guess what? It wasn't half as good. It had a higher rate of expansion and made my hoses tough to get off, I was always 'cracking' the line to relieve pressure to get things apart. Also the Amsoil smelled like it was burning when I was working the machine or BH hard.

To each his own but I use Deere exclusively. In my engine I'm using the Deere Plus 50 two synthetic. Not cheap but everyone raves about it.

Rob

 

[Runner]

Since I run my machine MUCH more when it's above 80 degrees, than when below 32, I use regular HyGuard.

What I have never heard, is a discussion on WHY it makes a difference?

When I went to the dealer and tried to buy the "thinner" motor oil recommended in my 2520 manual (10w-30), they looked at me like I was from outer space and said "the only motor oil we use or sell is 15w-40".

So, if "thicker" motor oil is "better", why isn't it that way with the hydraulic oil?

I could understand using thinner oil in someplace like Alaska, i.e., regular operation in extreme cold, but it seems to me that most of the lower 48 ought to be ok with thicker hydro oil unless the only time you use the machine is winter.

So far, I haven't seen any ill-effects from using the regular HyGard in Missouri weather, which runs from about 0 to 100 degrees.

(by the way, I'll bet JD has a whole department that just sits around thinking up catchy product names with phonetic spellings, Quick-Tach, iMatch, etc.)

 

[Rob-D]

Since I run my machine MUCH more when it's above 80 degrees, than when below 32, I use regular HyGuard.

What I have never heard, is a discussion on WHY it makes a difference?

When I went to the dealer and tried to buy the "thinner" motor oil recommended in my 2520 manual (10w-30), they looked at me like I was from outer space and said "the only motor oil we use or sell is 15w-40".

So, if "thicker" motor oil is "better", why isn't it that way with the hydraulic oil?

I could understand using thinner oil in someplace like Alaska, i.e., regular operation in extreme cold, but it seems to me that most of the lower 48 ought to be ok with thicker hydro oil unless the only time you use the machine is winter.

So far, I haven't seen any ill-effects from using the regular HyGard in Missouri weather, which runs from about 0 to 100 degrees.

(by the way, I'll bet JD has a whole department that just sits around thinking up catchy product names with phonetic spellings, Quick-Tach, iMatch, etc.)

Runner,
I think you make a good point about dealers sticking to what's been done in the past without thinking about what's best for each specific application. More than once I've known more about my tractor than the dealer. We're a knowledgeable group here.
I asked my friend to pick up oil for my tractor and she came back with the dealer recommended 15-30. I went back and ordered the Plus 50 ll. They had to look it up, didn't carry it, and didn't know much about it.

Caveat emptor.

Rob