I have a 1953 Jubilee and want to change the HYD fluid

. How many qts.
will it take, and should I use a specific brand?

I use GL-1 -90 gear oil. Brand your choice.
Hyd -8 qts
Trans-5 qts
Diff-8.5 qts
5 gallons will adequately fill everything. ( If a jubilee has a separate hyd reservoir I never knew about it. )
The 3 systems are common with one dipstick to check level.
I hope the club experts will correct me if I’m wrong.
Walt
Jub owner since 1970

Here is the manual. It says 8 qts.

https://ntractorclub.com/manuals/tractors/Ford%20Tractor%20Owner's%20Manual,%20Model%20NAA.pdf