1988 pc 120 - stuck hydraulics

Hello,

I own a 1988 pc-120. The hydraulics on this machine are manual.

The machine has sat for 4 or 5 years.
I put two new batteries in it today and it fired right up. Runs perfect.

Problem- the forward and reverse control levels are frozen- stuck. Also, the boom up lever is stuck. All the other controls work.
I tried to spray some pb blasted on the main control valves. I also tapped the arms with a hammer and a block of wood?

Should I try and take out the control values?? They...

1988 pc 120 - stuck hydraulics

1988 pc 120 - stuck hydraulics