Hi
Problem found and fixed.
I bought the loader used, previous owner used a Graupner radio and I changed to Frsky.
Frsky must have servo movement extented beyond 100% so 125% fixes this problem
Found it when searching Leimbach website:
http://www.leimbach-modellbau.de/FAQ/ look at Fragen zum Thema: Steuerventil then under Meine Hydraulik-Funktionen arbeiten mit der SERVONAUT Fernsteuerung langsamer als vorher, woran kann das liegen ?
Sorry for that being on a german website, but only place I found information about it.
Hope this will help others in future
Best Regards
Carsten