I have had a lot of fun rebuilding mine.
Tonight I cleaned the chaincase and put five gallons of hydraulic fluid, it requires 9 gallons but I want to see if it leaks before I put the rest in.
I have a 1975 Mini Mac 5C, I re powered it with a 16 hp B & S. I was trying to dig some tree roots to remove a stump. I broke the snap ring on the curl cly. I have it and the lift cylinder on the bench waiting on seals.
I wish I had bought a skid steer 20 years ago!