Ok here at the intersection of the coastal plain and the piedmont regions of North Carolina, we have some unique situations. First of all, it's impossible to grow a nice lawn as we get too cold in winter for warm season grasses leaving them susceptible to disease. Too hot in summer for cool season grasses so lots of watering is required, leaving them susceptible to diseases. So either way you go, its expensive and you have to continually reseed and work hard to nurture. Now my problem. We recently had a week of temperatures in the 10f - 20f range and then a day and night in the 1f -10f range. The hydraulics on my 1968 Ford 2000 worked fine to clear 5" of snow off driveway but the next day (1f) the hydraulics froze. It took 2 days in the 50f - 60f range to thaw and work normally. I know the fluid had loaded up with condensation again after changing it in August. I've now purchased new filters and will change it again in the coming week. (I expect the filters now in it haven't been changed since new and probably the oil hadn't been changed until I did it in August). Realizing that those extreme cold temperatures for a week are a rarity, I'm wondering if the wet fluid froze in the sump or in the lines to the pump. Any opinions? In the somewhat unlikely event this happens again, I'd like to have a chance at knowing where the problem is/was.