Parts list: № Number Qty Name Options 1 R542221 4 Screw 2 RE593381 1 Electronic Control Unit Next page: ST959420 Multi Functional Controller, Roof ST953643 Steering Controller, ACS™ ( - 200000) ST1019935 Steering Controller, AutoTrac™ W/ Backup Pump (200001 - ) ST1027570 Steering Controller, ACS™ (200001 - ) ST953645 Multi-Functional Controller, Cab Control ST953657 Front Controller, W/ Front PTO, ILS™ and Front Hitch W/ Dedicated Valve ST959416 Multi-Functional Controller, Chassis ST953651 Front Controller, W/ ILS™ PICT-OSO.1 OSO Control Units