My 114 no longer has curl power to the bucket and it wont hold its curl position. It will curl back when empty but when I go into a snow bank it dumps down as I raise the arms. To keep the bucket curled back when empty I have to continually pull back on the curl lever. If I hold the curl lever back while lifting the arms to load snow it takes power away from the lift arms and doesn't lift well. Wondering if its all in the valve body or do I have some other major event going on here. The hydraulic oil is full. The hydraulics have performed correctly for the last 20 years. Any advise would be appreciated. Thanks for reading