Controls - 26 HT220 Operator’s Manual Center Console Indicators 1. Maintenance indicator 6. Left track filter indicator 2. Wait to start indicator 7. Double filter indicator 3. Warning ignition “ON” indicator 8. Right track filter indicator 4. Low hydraulic fluid indicator 9. Single filter indicator 5. Air filter indicator 10. Digging filter indicator CMW Item Description Notes Light comes on when the engine needs maintenance.