Hi i know i am like 10 years late on this but did you ever figure out what the cause was on your Linde?

I have one that is doing precisely the same thing, also checked all the stuff as per your posts, hydraulics work with steering but lifting/tilting/side shift not working or engaging hydraulic pump. changed the joystics and still the same.

Had a guy come out to diagnose it and all that he said the valve DAB9 is faulty, tested all the valves and working 100%.

Please any help will be appriciated.