Förfarande för begränsning av hydrauloljeläckage vid en bergborrigg

摘要

Method for restricting leakage of hydraulic oil in a rock drilling rig (I). The oil level in the tank (3) is read and stored in a memory each time one switches between drilling and positioning of different components on the drill rig (I). After that the oil level is read at even intervals between the changes of operational mode. The last five read values are used for calculation of a level change velocity of the level in tank (3). The supply of hydraulic oil from pump (2) to drill rig (I) is stopped if the level in the tank has dropped a predetermined value, separately adjustable for each operational mode, or if the level change velocity exceeds a predetermined value, separately adjustable for each operational mode.