Viscosity of Hy-Tran

[Super-H-Mike]

I have recently been given a 30 gallon barrel of new Hy-Tran oil and am wondering what all I can use it with. What is the viscosity of this fluid? Lift-All ? Letter series rear end? It does seem thinner than 80 wieght. All my tractors are older than 1954.
 

[old]

It is something close to a 20W or 30W oil but made with additives to work as a hyd oil or a transmission oil or even the rear ends.
 

[CNKS]

Equivalent to SAE 10. Use in any tractor with a TA. You can use it in the letter series, trans/rear end but it might leak, and it does not slow the gears as much as 90, etc. OK in old lift all, and should be used in any tractor with a live pump.
 

[John G. Hasler]

A quick Web search indicates that the viscosity of Hy-Tran is equivalent to SAE 10W30. In addition to any application calling for hydraulic fluid I"d use it in any none-high-temperature application calling for SAE 30 oil. I wouldn"t use it in an engine.
 

[Super-H-Mike]

Thanks gentlemen. I may elect to use it in my non-working tractors rear diffs,because I got the oil free and at least one of those tractors has some moisture in the current rear end oil. And the Lift-Alls of any of them.
 

[LJD]

80W is a gear-oil designation that is roughly equal to 30W engine oil.

Using engine oil viscosity numbers, combo-trans/hydraulic oil from all the big suppliers is 20W for regular grade and 10W for winter-grade.
 

[CNKS]

John, Hytran is not multivis, it is single grade SAE 10. I think I saw the same post that you did, that doesn't mean it is correct. In trying to ease the shifting in my 460 I am now using a SAE 20 version, it does not cure the problem, but helps.
 

[pete 23]

I see there is no agreement on the viscosity of HY-Tran fluid. We are always told in service training it was multi grade. It does hold it's viscosity very well when it gets hot which indicates it has substantial viscosity index improvers
added. Earl Kramer preached this many times. There was two weights back in the 90's but I don't know if there still is and I never saw the lighter weight. It was for severe cold weather operation.
 

[Jim Becker]

I don't believe the viscosity index of HyTran matches up with any motor oil, straight weight or multiweight. As I recall, depending on the temperature you are looking at, it is somewhere in the 10 or 20 range of motor oil.
 

[Jamie1975]

Hytran is an ISO46 and it is a straight weight.
 

[scotc]

Case also sells an HTO additive, if my memory is right, that you mix at a certain ratio with 10w-30 for use in hydraulic systems.
 

[mkirsch]

If we're going to get fussy about oil here, then the "W" is not used with a single-viscosity oil.

The W stands for WINTER, and is only used in conjunction with multi-viscosity oils, such as 10W30.

There is no such thing as "30W" oil. It is SAE 30, or 30 weight.

This has been a fussy oil controversy moment, brought to you by our fine sponsors, the monkey and the football.
 

[Jim Becker]

Yes W is for "winter". True there is no 30W. However, there are 10W and 20W.
 

[mkirsch]

So what weight are they in summer?

That makes no sense. What good is a "winter" rating on a single-grade oil?
 

[Jim Becker]

A lot of things don't make sense until you understand them. This is getting far from the original question in this thread, but here goes.

The winter weight oils have to meet a set of viscosity specifications that are mostly separate from the other weights of oil. The only common viscosity spec is minimum kinematic viscosity at 100 degrees C. Additional specs for winter oils are all at lower temperatures, for non-winter oil the others are all at 100 degree or higher temperatures.

The winter oils each have a maximum viscosity at a specified low temperature that varies by each weight. They also have a maximum pour point/pumping temperature for each viscosity rating.

The non-winter grades do not have to meet any of the low temperature tests but have to maintain minumum shear rate viscosities at 100 and 150 degrees centigrade.

Multi-weight oils, such as 10W30 use viscosity index improvers that allow them to pass both the low temperature tests of a 10W grade oil and the high temperature tests of 30 grade. Straight grade oils do not contain viscosity index improvers.

Simple isn't it?