Hi Mike, the hydraulics are pretty simple compared with something like an RH200. There are plenty of pics to go off online. I have also detailed a yellow H485 and a Komatsu version.
The general layout of the pipes is there, but not super accurate, plus I kept the pipe castings on the originals, and just added extras where they were needed!
I also bought myself a copy of Steven Vale's Walking With Giants book - a few shots of the Boliden machines. There is also a Demag facebook group with plenty of photos.
Have fun doing your model!