Advice on correct use of hydraulic 8011

Hi All,

I have just got my self a 1977 crystal 8011, although I had one new in 1975 my memory is not as good, as I am a bit foggy with the control levers, I attached my plough yesterday and had to pull both levers back to raise the plough, then it stopped working, had to leave it stuck in the middle of the yard, went out this morning and it lifted fine. I have the rear selector lever in the forward position As I think this is draft (the instruction badge is missing) Can I find an operators book anywhere,I have a workshop manual on CD but find it very hard to read.
Many thanks regards John

Outside lever, up and down, can be position, mixed or draft depending on the lever nearest the seat which has 3 positions, back for pos ("P"), centre for draft and pos combined (mixed or "M") foreward for draft "D"
centre lever is external tappings, back is up for one cyl or part of a d/a cylinder, next foreward is hold for both, next is drop or float for both and fully foreward is pressure for the other tapping or D/A ram.
Flow control is the rotary valve either under the seat, or behind the seat on older tractors