Is it advisable to use hytran oil in a totally rebuilt IHC Supper A, C or BN type transmition and bullgear sumps with all new bearings and seals since it is being used in the touch control unit?
 
Some people seem to think so but me I use a UTF that meets the IH specs. I use the 303 UTF in my tractors
 
WHY would you put thin hydraulic oil in places that left the factory with heavy gear oil? Are you just asking for it to leak?

For the ones of the models you mentioned that have hydraulics, there's no leakage path between any of those places and the hydraulic system, the only way oil can swap around is engine oil and hydraulic oil, if the pump seal is not doing its job.

So, WHY???
 
You have two separate systems. Run gear oil in the transmission and bull gear sumps. Then hydraulic/Hytran in the touchmatic control unit.
 

HyTran is the CIH version of universal transmission fluid which is called UTF, but with slight additive differences. It is used where the hydraulic system oil has to also take good care of wet clutch packs and seals. Since your BN has no clutch packs the hydraulic system will be perfectly happy with substantially cheaper plain old hydraulic oil.
 
Hy-Tran should be used in tractors with Torque-Amplifier, or hydrostatic transmissions. Your Super A, C, BN is exactly like my Stage II Super H and '51 M with M&W live hyd,, no TA, no hydrostatic transmission, so use the factory recommended 90W in the transmission & final drives, and Hy-Tran in the hydraulic system.
Doing this across your fleet of tractors prevents cross-contamination of oils from using different tractors on the same implement.

If I had a Super M-TA with torque amplifier I would use Hy-Tran in the transmission and final drive because it shares oil with the T-A. I'd also use Hy-Tran in the LPTO too.
 

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