ventrac 4200 steering and implement hydraulic loss

I had last used the ventrac for blowing snow in March and backed it into the garage, it was working fine. A week ago I wanted to change the blower for the mowing deck, but the steering and implement hydraualics are very sluggish to not working at all, it will turn the blower chute very slowly. I do have forward and reverse hydraulics. The tractor is 12 years old with under 2000 hours, so I changed the front and rear hydraulic filters. It still acts the same. Any help would be appreciated, I can not find any problems similar on the internet. Thank You, Frank