Originally Posted by
country1
How hot does the hyd oil get? Years ago, most big 4WD farm tractors did not have PTO. When they started using the tractor hyd system to power external hyd pumps, several had problems with burning out the tractor hyd pumps or problems with the valves, o-rings, etc. Synthetic or synthetic blend hyd oils seemed to take care of the problem. Today, the hyd system on most farm tractors has a much larger oil capacity, so the hyd oil temps do not get as hot. Maybe the hyd oil temp is not a factor for your application.
I don't use it often (skid steers and bigger tractors if I need a lot of bucket work), but needless to say, it does get hot with use, even with the ~2gal reservoir (old air bubble tank). It's not one of my finer works, but it works for the limited uses I have for it.