i know its not the same we often take the hydraulic filters out of jcbs to find swarf and once a piece of metal the size of your thumb nail stuck to the magnet, its normally on new machines which is ok until a piece gets stuck in a spool valve can be interesting/ dangerous,is there a filter in the tank or in line this maybe from new its not very often a pump goes wrong thay will just lose pressure we have some machines with 9000 hrs and there still working ok with a good pressure you may find this has not done much work and it could be from new chris