JD/ Kubota

[OCDLubeman]

JGD,

Good investigative work. You are right - I am wrong. The Kubota UDT bottle also lists John Deere J21A - the J20D bottle (Low vis hy-gard) says "replaces J21A.

There must not be too much viscosity difference between the two JD fluids if Kubota and others can cover it with one oil.

 

[djg]

Should be changing fluid this weekend, I will post if tractor blows up or grinds itself to bits.

 

[gsxr1100]

John Deere Hy-Gard™ Hydraulic/Transmission Oil
Viscosity at 40*C 59cst
Viscosity at 100*C 9.4cst
Viscosity index 140
Pour point *C -40
Flash point *C 227


Properties listed for UDT are:
Gravity, degree API 29.5
Viscosity @ -30°C, cP 18,300
Viscosity @100°C, cSt 9.5
Viscosity @ 40°C, cSt 60.0
Viscosity Index 140
Pour Point, C° max -35
Zinc, % wt. 0.12


For Super UDT:
Specific Gravity @-15.6° .0877
Viscosity @ 25°C, cSt 84
Viscosity @ 100°C, cSt 9.00
Viscosity @ 40°C, cSt 45
Pour Point, C° max -46
Zinc % wt. 0.17

You could also use Amsoil’s tarctor/ hyd in there, Also Chevron AW THF and I think Schaeffers.

I would use whatever is cheaper since there are all very very close.

 

[djg]

How do you know all this stuff?