Balerguy2,
Sorry for my late reply
I have been trying to gather more information for you, For starters here is the tractor
TractorData.com Branson 6530C tractor information
the hydraulic motor Attaches to the gearbox by a dual sprocket piece (at the front)
the gearbox drives a shaft that runs along to a sprocket with a chain and a tensioner that drives the main auger.
I believe one of the output shafts on the gearbox drives the fan as well.
Unfortunately I do not know if the setup had any previous issues, The previous owner did take great care of his equipment. But I will be talking with him.
The Manual on the snow blower says that the pto rpm should be 540, however the manual is for this snow blower, before its customization and conversion to hydraulics. The previous owner did have it 1080 rpm, and was told to keep it at that.
The snow blower does have 2 stages, the main auger pulls the snow into the fan and is then driven up and out of the shoot.
The snow blower was made by smyth welding and it is a 78-sh which isn't on the site, the closest one is the 78-s but that is a rear mount snow blower and mine has been customized.
if need be I can take more photos the next time I have the tractor out, for now here are some of the reservoir tank (which is approximately half full) and the only gauge on it which is attached to the intank filter.




In the picture with the hydraulic lines, the pipe/line with the yellow handle is the input to the pump. the output comes out of the right side of the pump and goes to the pressure relief valve then continues along to the motor, and the return line comes back between the input to the pump and goes up the side of the reservoir with the pressure relief bypass.