Oil-cooled servo stabilizers are built for heavy-duty continuous operation, but regular maintenance significantly extends their lifespan. 1. Check transformer oil levels and insulation quality every 6 months. 2. Lubricate the servo motor's carbon brushes and gear assembly quarterly. 3. Inspect contactors and relays for pitting or arcing damage. 4. Keep the unit's ventilation clear of dust. 5. Schedule an annual professional inspection.