EC21 Product Catalogs - hydromatik http://www.ec21.com/ec-market/hydromatik.html Boom Pump(JJ Type)http://junjin.en.ec21.com/Boom_Pump_JJ_Type--2470775_2471200.htmlhydromatik Tandem A20VLO190 Hydraulic system pressure 350bar(5075psi) Lube system (hopper) Automatic Switching sys20071122