I was using the skid steer this morning to push a piece of the fireplace to the burn pile when the skidsteer stopped. So much coolant coming from the rad it flooded the distributor and alternator.
So spent the rest of the day removing the radiator. Well two radiators - one for the hydraulic circuit, one for the engine coolant. Hopefully tomorrow I can find a place to rebuild it. It has a foot long crack along the top that joins to the core assembly. I guess the good news was that if I hadn't removed the rad I never would have noticed how badly gunked up the core was.