Looking for the troubleshootings in hydraulic systems may be complicated. It requires knowledge, measurement tools and dexterity. Faulty troubleshooting may result in prolongation of time, unnecessary repairs and replacement of parts. Expert support, proper equipment selection and logical approach are essential to avoid costly mistakes. Troubleshooting must be started by checking the easy operations (oil level, filter, coupling drive system, etc.) and eliminating possible problems of these. Hydraulic systems contain high pressures inside; it must not be forgotten that this can cause serious injuries.