Your control handles for the hydraulics are on your dash, correct? You should be able to see the linkage that connects the handles to the control valve. Using the tilt handle as a reference, push the tilt handle fully forward & backward & watch how the valve goes fully up & down and in it's bore in the control valve. Do the same with the hoist lever & see what the valve does in it's bore.
Do the above with the engine off & the front if the lift free af any obstacles as the forks may come down.