15bar -> 15 x 14psi/bar = 210psi
Lift capacity will depend on the size of cylinder diameter.
If you're building an excav of that size, then I'd say Leimbach's hyd system is too small for you.
The cyl bore on my JD850 is 18mm & Lenghts from approx 140mm to 195mm. The flow lines are 5mm ID. The pressure relief valve has a limit I think of 30bar, maybe more. I don't intend to run it any higher than necessary, maybe 20-25bar.
The cyl bores on my small Stahl Liebherr 922 are 14mm & Lengths from 50mm to 75mm. The flow lines are 2.5mm.
The JD850 uses this pump (I'm guessing as there is no markings on the pump as to what model# Jung pump it is)
http://www.jung-fluid.de/english/pdf/IPZ1-HR2-EN.pdf
