OIL GLASS

550 855 96 OIL GLASS As the core of an electro-hydraulic solenoid valve, this coil assembly generates a magnetic field when it receives an electrical signal from the operator's controls. This magnetic force is what physically moves the internal spool of the valve, opening or closing pathways for hydraulic fluid. These valves are located throughout the rig, controlling everything from boom and feed movements to specific functions on the rock drill itself.

A reliable coil is essential for the rig's responsiveness and safety. When a coil fails, the associated function, such as boom swing or drifter rotation, will become completely unresponsive. An intermittent or weak coil can lead to sluggish or unpredictable machine behavior, which can compromise both drilling accuracy and operator safety. If the coil for the percussion valve fails, for instance, the drifter will stop hammering and halt production.

A common sign of failure is the complete loss of a hydraulic function, sometimes accompanied by an error code on the control screen. Before replacement, always check the electrical connector for corrosion or damage. Replacing the coil typically involves removing a single retaining nut, sliding the old unit off the valve stem, and installing the new one.