My father has a kobelco sk 150. I believe it's a 1994 or 1995. Yesterday I was digging and then I lost all hydraulic functions. I was wondering if any one could direct me where to start trouble shooting. The only function that would work is the thumb would come out but not go back in. Thanks
First guess would be you lost the drive coupler between the engine and pumps....
Believe it or not it was a blown fuse
Well done!