Safety lock solenoid valve for excavators, part 4579878 Compact replacement solenoid valve designed for safety lock systems on compatible excavator models. Intended for maintenance and to restore or maintain the locking function that secures hydraulic circuits during idle and service operations. Key benefits Restores safety lock operation: Replaces a faulty solenoid valve to recover the locking function that helps prevent unintended hydraulic movement during service and transport. Direct compatibility: Listed for use with excavator models E320D, E330D, E336D, and E336D2 using part number 4579878. Low chemical concern: concern chemical designation None, suitable for standard maintenance practices. Simple maintenance fit: Designed as a dropin replacement when the correct part number and model compatibility are confirmed. Main attributes Function: Safety lock solenoid valve for excavator hydraulic safety systems. Compatibility: Part 4579878, compatible with E320D, E330D, E336D, E336D2 excavator models. Type: Other (specialized replacement component). Color: Import model. Chemical profile: No concern chemicals reported. Practical use scenarios Onsite after a solenoid failure: the defective valve to restore the safety lock and bring the excavator back into safe working condition. Routine maintenance in a workshop: Keep a spare unit on hand to minimize downtime during scheduled service intervals. Fleet servicing: Standardize replacement parts across compatible model units to simplify inventory and reduce diagnostic time. Installation and fit notes Verify part number 4579878 and machine model before installation. Follow machine manufacturer recommended procedures for removal, installation, and system bleeding as applicable. Intended for technicians familiar with excavator hydraulic and electrical systems. This product description reflects the listed specifications and compatibility. Verify fitment for your machine prior to .