I have a IH 784 and need to change the hydraulic fluid, since I will be changing the filter and need to troubleshoot the reason for a weak loader. I thought it would be best to start out with fresh fluid, filter, correct level, etc. Does anybody know what fluid the tractor needs? I will be going to O'Reillys today to get the filter and just need to know which weight. I live in the Deep South, so cold is not a problem, but heat is.
1979 IH 784 what Hydraulic fluid to use??????
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allenr
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IH specified their own "Hytran" oil for all their tractors of this era.
However most oil companies have an alternative, the one I have is Mobilfluid 423 - no viscosity mentioned but it is quite thin,
However most oil companies have an alternative, the one I have is Mobilfluid 423 - no viscosity mentioned but it is quite thin,
Hello again " gator dog"
The recommended oil is IH Hytran, a superior oil but it can be pricey!! But my personal recommendation would be to use this.
Alternatively a good super universal tractor oil (SUTO) would be acceptable.
Below is a text I placed on another forum, for your info!!!
Some thoughts on Hy Tran fom my IH & Case days ????
Hy-Tran Oil.
This was developed in the mid 1960’s by IH engineering @ Hinsdale, Illinois to meet the future(Then) needs of IH tractor transmissions and hydraulic systems, particularly the “Hydrostatic Drive” they were developing.
The oil consists of a base specification stock oil which was supplied by any of the approved blenders around the world, to which was added an additive package designed by IH and supplied only by ”Viscosity Oils”.(A division of Tenneco, owners of Case, at the time!!).
The colour of the blended oil will vary with where in the world it is supplied from, for instance in U/K the blender was Daltons of Belper (now FUCHS lubricants) and the oil had a reddish hue, In France I believe the blender was Elf and the oil had a smoky blue tinge. Oil colour is determined by the colour of the blenders stock oil.
To help the oil carry out its EP function most oils use Zinc-dialkyl-dithio-phosphate (ZDDP) as the additive, whereas the EP additive used in Hy-Tran is a more expensive “Phosphate Ester” based mineral.
One of the main functions of Hy-Tran and its derivatives is its capability to hold water in suspension so that it does not cause damage to sensitive valves (from memory the figure is 6% by volume). This also helps the anti foaming qualities of the oil as well.
Over a period of operating hours in hot and cold climates and periods when equipment is not operated, condensation can form in reservoirs and transmission cases and this will form water droplets that can collect in the bottom of transmission cases and inside precision valves. Assume then that we now have some water in our transmission and the oil we are using has ZDDP as the EP additive. At the boundary between the water droplets and the oil a chemical reaction occurs which forms highly corrosive acid products that are circulated through the systems at next use. If these products get into a control vale and stay there for a while, corrosion then valve malfunction can occur. Phosphate Ester additive does not have this problem, and due to the oils capability to hold 6% by volume of water in suspension it stops water causing corrosion in the valves.
From the Mid 80,s Case IH engineers came up with Hy-Tran -Plus, this is essentially Hy-Tran with an increased dose of “Anti Squawk (AS) additive to further reduce brake noise but also reduce Clutch pack lock up noise in power shift transmissions
AS additive is basically a friction modifier and if too much was added the clutch packs when locked up would still slip and / or the brakes would fail to stop the tractor !!!
For cold climates it was found that Hy-Tran was still too viscous (Thick) causing sluggish operation of hydraulic systems so a special Arctic Hy-Tran was made available, same additive package but using a thinner basic stock oil for the blend.
So you pays your money and makes your choice!!!!!!.
The recommended oil is IH Hytran, a superior oil but it can be pricey!! But my personal recommendation would be to use this.
Alternatively a good super universal tractor oil (SUTO) would be acceptable.
Below is a text I placed on another forum, for your info!!!
Some thoughts on Hy Tran fom my IH & Case days ????
Hy-Tran Oil.
This was developed in the mid 1960’s by IH engineering @ Hinsdale, Illinois to meet the future(Then) needs of IH tractor transmissions and hydraulic systems, particularly the “Hydrostatic Drive” they were developing.
The oil consists of a base specification stock oil which was supplied by any of the approved blenders around the world, to which was added an additive package designed by IH and supplied only by ”Viscosity Oils”.(A division of Tenneco, owners of Case, at the time!!).
The colour of the blended oil will vary with where in the world it is supplied from, for instance in U/K the blender was Daltons of Belper (now FUCHS lubricants) and the oil had a reddish hue, In France I believe the blender was Elf and the oil had a smoky blue tinge. Oil colour is determined by the colour of the blenders stock oil.
To help the oil carry out its EP function most oils use Zinc-dialkyl-dithio-phosphate (ZDDP) as the additive, whereas the EP additive used in Hy-Tran is a more expensive “Phosphate Ester” based mineral.
One of the main functions of Hy-Tran and its derivatives is its capability to hold water in suspension so that it does not cause damage to sensitive valves (from memory the figure is 6% by volume). This also helps the anti foaming qualities of the oil as well.
Over a period of operating hours in hot and cold climates and periods when equipment is not operated, condensation can form in reservoirs and transmission cases and this will form water droplets that can collect in the bottom of transmission cases and inside precision valves. Assume then that we now have some water in our transmission and the oil we are using has ZDDP as the EP additive. At the boundary between the water droplets and the oil a chemical reaction occurs which forms highly corrosive acid products that are circulated through the systems at next use. If these products get into a control vale and stay there for a while, corrosion then valve malfunction can occur. Phosphate Ester additive does not have this problem, and due to the oils capability to hold 6% by volume of water in suspension it stops water causing corrosion in the valves.
From the Mid 80,s Case IH engineers came up with Hy-Tran -Plus, this is essentially Hy-Tran with an increased dose of “Anti Squawk (AS) additive to further reduce brake noise but also reduce Clutch pack lock up noise in power shift transmissions
AS additive is basically a friction modifier and if too much was added the clutch packs when locked up would still slip and / or the brakes would fail to stop the tractor !!!
For cold climates it was found that Hy-Tran was still too viscous (Thick) causing sluggish operation of hydraulic systems so a special Arctic Hy-Tran was made available, same additive package but using a thinner basic stock oil for the blend.
So you pays your money and makes your choice!!!!!!.
art
Super Member
Some people do use economy blends of hydraulic oil in older tractors because of the reduced initial costs. This doesn't mean that it might not cost you more in the long run. We have had good success with it here in NY because of the cold although that doesn't mean you need it in texas. We often do to the hot and cold find oil not going bad because of the hours but time and water issues.
Grateful11
Veteran Member
My wife won't use anything but Hy-Tran Ultra in their CaseIH and IH equipment. I've been told it's formulation can handle more moisture contamination than about any other. If you buy it in 2.5 or 5 gal containers it will save you a bit over smaller containers. You're not going to change it that often so I say use what's formulated for your equipment by the manufacturer, I know it's not made by CaseIH but it's made to their specs.
