
I wash off the metal debris from my suction screen in the drained hydraulic oil pan. They aren't that strong, just shake the tube & they'll fall out. You likely have metal debris magnets inside your suction tube screen. Buy John Deere LOW VISCOSITY HY-GARD TM TY6342 genuine, new aftermarket tractor parts with delivery. Sure it costs more, but for changing only every 200 hours or so, it's not that big an expense. TY6342 John Deere LOW VISCOSITY HY-GARD TM. You won't get hydrostat transmission squalling & complaining when it's cold out, either. This is no different than a multi-vis engine oil, in this respect. (12-09) Physical Properties Test Parameters Hy-Gard Low-Viscosity Hy-Gard Viscosity 40☌ 59 cSt 33 cSt Viscosity 100☌ 9.4 cSt 7.1 cSt Viscosity Index 140 195 Pour Point -40C -51C Flash Point 227☌ 180C. You just need to be sure to change it when you should, since it has viscosity index improvers that shear down over time (normal vis does not). The anti-wear formulation of Hy-Gard develops a durable fluid film, which helps prevent metal-to- metal contact. I find Lo Vis performs better in all conditions - it flows faster in all hydraulic circuits. But the tractor must have been factory filled with regular vis (Georgia JD plant), because when I changed it 50 hour maintenance last year the transmission really quieted down.ĭo you have something really unique on your tractor like a Limited Slip clutch pack or something?
#HY GARD LOW VISCOSITY MANUAL#
In fact, my manual says Lo Vis is 'preferred' over regular vis.
#HY GARD LOW VISCOSITY MANUALS#
My JD manuals have never mentioned not mixing HyGard & Lo Vis HyGard, including my latest tractor. Hydraulic fluid used to be colored RED to make it easier to see in the sight glass.Well, this is interesting.

It has the same performance specifications as Hy-Gard and can be used as a replacement for Hy-Gard in cold weather. Hy-Gard may be used in many applications specifying either of these grades.
#HY GARD LOW VISCOSITY ISO#
Hy-Gard viscosity places it between ISO 46 and 68 grades. SAE 10W30 engine oil with API classifications of SE or higher is recommended in the transmission. Low-Viscosity Hy-Gard has an ISO 32 viscosity grade.

Hydrostatic Transmission Oil See your John Deere dealer for service. Low-Viscosity Hy-Gard replaces John Deere All-Weather Hydrostatic Fluid and should be used as a direct replacement for all applications recommending hydrostatic fluid Low-Viscosity Hy-Gard is compatible with hydrostatic fluid and can be added to systems which contain hydrostatic fluid Low-Viscosity Hy-Gard has an ISO 32 Viscosity Grade Low. The key is that I use my machine primarily in the summer, when it can exceed J20D's maximum 86F.Ĭonsidering this, what type of fluid goes in a John Deere hydrostatic transmission? J20D can be used down to -500 or something. I agree with Tim, HyGard is 15W-20W, Low Vis hy gard is 10W.įurthermore, what is the difference between j20c and j20d? The only rated difference between J20C and J20D that I can tell is that J20C can only be used down to 14F. Hy- Gard fluid is a multi-viscosity fluid with a high-viscosity index. Low-Viscosity Hy-Gard has an ISO 32 viscosity grade. Both Hy-Gard fluids are multi-viscosity fluids with high-viscosity index. Hy-Gard retains proper viscosity over a wide range of operating temperatures thanks to its polymeric viscosity improver.

Hy- Gard transmission and hydraulic oil is a unique oil developed by John Deere engineers to meet the exact needs of John Deere machines. Both Hy-Gard fluids are multi-viscosity fluids with high-viscosity index.
