mfreund
Veteran Member
Hy-guard is for a climate that never gets below freezing. Lo Vis is recommended here in Iowa and my Deere dealer told me they mix very well and are completely compatable.
Low Viscosity vs Hygard
- Thread starter bigtiller
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bigtiller
Super Member
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- Feb 1, 2006
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- Location
- central Iowa
- Tractor
- John Deere 2720 John Deere 3039R John Deere Z545R
I sure do appreciate everyone speaking up........and BuilderML, I will be sure to look for magnets in the filter. I would have never looked in it. Thanks!
Kaliburz
Gold Member
My dealer explained to me the difference. As stated by mfreund, it's all about temperature. The low viscosity is for colder climates.
I asked my dealer, because I was replacing the hydraulic fluid in an OLD late 1950's Yale forklift. The manual said to use "turbine" quality oil and listed a viscosity index number. I used regular Hy-guard (since I have lots of JD tractors and buy it by the 55 gallon drum), but when cold, below 40F, I notice it takes some time for the pump to prime (pump is HIGHER then the tank).
My suggestion to using Hygard vs low vis in a hydrostatic tranny, let it warm up. If you HAD standard hyguard and you said low vis is quieter, it's (just a guess) the pressure bypass. I have a few old Jacobsen law tractors that have a hydro-stat trans and it squeals when cold (it has different oils recommended too....but one was similar to JD Hyguard-aka hydraulic/transmission oil). If you start it up for winter/cold weather use, start it up, let it idle 5 min....then bump up the throttle a little. If you have a front end loader, cycle the loader up down 3-5 times after warming. Just don't start the thing and in less then 1 min, stomp on the go peddle. You could, but letting it warm up is better.... I do that w/ my JD's when I need to use the hydraulic systems.
I asked my dealer, because I was replacing the hydraulic fluid in an OLD late 1950's Yale forklift. The manual said to use "turbine" quality oil and listed a viscosity index number. I used regular Hy-guard (since I have lots of JD tractors and buy it by the 55 gallon drum), but when cold, below 40F, I notice it takes some time for the pump to prime (pump is HIGHER then the tank).
My suggestion to using Hygard vs low vis in a hydrostatic tranny, let it warm up. If you HAD standard hyguard and you said low vis is quieter, it's (just a guess) the pressure bypass. I have a few old Jacobsen law tractors that have a hydro-stat trans and it squeals when cold (it has different oils recommended too....but one was similar to JD Hyguard-aka hydraulic/transmission oil). If you start it up for winter/cold weather use, start it up, let it idle 5 min....then bump up the throttle a little. If you have a front end loader, cycle the loader up down 3-5 times after warming. Just don't start the thing and in less then 1 min, stomp on the go peddle. You could, but letting it warm up is better.... I do that w/ my JD's when I need to use the hydraulic systems.
pinetree10
Gold Member
I just changed the engine oil and transmission/hydraulic oil in my 2720 for the first time and found magnets in both the screen and filter. The screen was loaded with metal chips but none on the magnets inside the filter. I was also faced with the dilemma of low viscosity or not and just went with the dealer's recommendation to use low vis because it allows for better circulation in cold or cooler weather. They told me they put it in all tractors they service around here, presumably because we're in Western New York. I don't use my tractor at all in the winter but I do use it in spring and fall when temperatures are in the forties so I followed suit.
My biggest suggestion would be to add hydraulic oil slowly as the ideal level sneaks up on you and you'll suddenly have it flowing out of the dipstick tube if you overfill it. Other suggestions would be to make sure the filter gasket comes off with the filter (it was still stuck to the underside of the tractor) and make sure you put the washer back on with the oil plug (I found it at the bottom of the oil pan).
My biggest suggestion would be to add hydraulic oil slowly as the ideal level sneaks up on you and you'll suddenly have it flowing out of the dipstick tube if you overfill it. Other suggestions would be to make sure the filter gasket comes off with the filter (it was still stuck to the underside of the tractor) and make sure you put the washer back on with the oil plug (I found it at the bottom of the oil pan).
CobyRupert
Super Member
Timely resurgence of this thread as I was just at dealer tonight to buy10 gal (at close to $20/gal) when the owner says you don't want Reg. Hy-Gard, you want the low viscosity. Hmmm?
Here's the chart from my manual, I rarely operate it at below 10 F, and if I did, it would be a slow warm up before I worked it. And I definitely experience 90F plus days in summer.
So which kind would you use?
Here's the chart from my manual, I rarely operate it at below 10 F, and if I did, it would be a slow warm up before I worked it. And I definitely experience 90F plus days in summer.
So which kind would you use?
prs
Platinum Member
Going by your chart, I would use the HyGuard. Your machine's design calls for down to about -14F. Your machine's design rejects the use of the Low VIs Hyguard at just warm spring temps.
When it is -14F, I wash my cloths in Tide. Too cold to wash them out-tide.
prs
When it is -14F, I wash my cloths in Tide. Too cold to wash them out-tide.
prs
CobyRupert
Super Member
I was pretty sure that I'd written the right oil down going by the chart, but what was the dealer talking about?
On the other hand, I see a lot of people run low viscosity all year?
On the other hand, I see a lot of people run low viscosity all year?
CobyRupert
Super Member
These are hydraulic oil charts from 3 different JD 5075 manuals I found online. A 2014, a Indian version and a 2015. The last is from my 2012 manual
Basically, for some they say upper range of low viscosity is 68 degrees, for others they say it's 86 degrees.
Why different temp ranges?
What should I use for tractor that sees 5F to 95F?
Basically, for some they say upper range of low viscosity is 68 degrees, for others they say it's 86 degrees.
Why different temp ranges?
What should I use for tractor that sees 5F to 95F?
OP
bigtiller
Super Member
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- 6,567
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- central Iowa
- Tractor
- John Deere 2720 John Deere 3039R John Deere Z545R
just to add to the confusion, here is the chart in my owners manual showing Low-Viscosity for air temps. as high as 104 F.
https://www.google.com/search?tbm=i...vPXKAhVHQSYKHUpoDtQQwg4IGigA&biw=1357&bih=685
https://www.google.com/search?tbm=i...vPXKAhVHQSYKHUpoDtQQwg4IGigA&biw=1357&bih=685
Deere Dude
Elite Member
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- John Deere 3720
I was confused when I changed oil in my JD3720. I pulled out the dipstick and engraved on it was HYGard Lo Vis. So I went to the dealer and asked for that specifically. He asked if I was sure because by the door was about 50 5 gallon buckets of HyGard? I confirmed Lo Vis. He went to the back room and brought out a 5 gallon can of Lo Vis that had a 1/4" of dust on the cover. In TN they must use mostly Hy Gard. But, my tractor runs fine all summer in the heat with Lo Vis but I don't use much ground engaging equipment.
