Orsta Power Steering Leak

I have an Orsta LAG-080-2-2 PN/8 power steering valve. It leaks at the top seal, this is the steering wheel side.

Does anyone know how to get to this seal? I took the bottom off but before going any further I'd appreciate any advice.

TIA,

Tony

Be very careful about repairing orbital steering units yourself!
Firstly you need special tools to install the seals.
Secondly, some of the components inside are so precisely made that if you hold them in your hand, the heat from your hand can expand the parts and they will not fit together.
Thirdly, if you put it together wrong you can turn the unit into a motor, so when you start the tractor the steering wheel will spin, after repairing dont touch the steering wheel when you first start the tractor, could break your arm.

My advice get someone who knows what they are doing to do it.

Thanks for the advice. I'm going to look for a used unit.

Tony