Hello, I have a new to me 843B that I'm still learning how to fix hydraulic systems with. 2 weeks ago I was moving snow, nothing to heavy and I lost all function of the lift arms and tilt. Parked it over night and the arms lowered by themselves, when I tried again to get it working, every now and then the lift arms would move up 1-2 inches then stop, bucket tilt still will not function, the bucket is tilted all the way down. When I was plowing it was about -25 degrees outside, and I thought the temp might have been a factor causing this? Could the fluid thickened enough to mess up the filter and now there is no flow? I can still drive forward and back, only leak is a bad seal in the tilt cylinder (which needs a new cylinder, but ive been using it like this for months still with no issue). Fluid is clear and at the proper level as well. Any direction or advice will be appreciated. I don't have a shop to work on it, so it might take some time to try things out since I'm in north central MN. Thank you!