<p>This master thesis has been conducted at Sandvik Svedala. The thesis is the first step towards a new construction of a hydraulic system for a Hydrocone crusher. First we studied how contaminations entered the system of today. Then the work began with designing several concepts to control the crusher. These basic concepts were presented to Sandvik and the one was chosen for further development was fine tuned and a system was built. This system was tested at a test rig to verify that the basic ideas were working. This test pointed out the disadvantages of the system, and the improvements needed to become a future industrial solution.</p>

This master thesis has been conducted at Sandvik Svedala. The thesis is the first step towards a new construction of a hydraulic system for a Hydrocone crusher. First we studied how contaminations entered the system of today. Then the work began with designing several concepts to control the crusher. These basic concepts were presented to Sandvik and the one was chosen for further development was fine tuned and a system was built. This system was tested at a test rig to verify that the basic ideas were working. This test pointed out the disadvantages of the system, and the improvements needed to become a future industrial solution.