Service Bulletins - MTZ-1221.4:
12-2020 1221.4 Cleaning of the pressure disks of the dry friction service brakes
2-2016 1221.4 Introduction the PTO indication system Speed sensor adjustment in Operator's Manual
14-2016 1221.4 Engine Display parameters changes in Operator's Manual
26-2016 1221.4 Creeper Modification
30-2016 1221.4 Draw bar information changes in Operator's Manual
16-2015 1221.4 Rear Wheel Cone hubs installation Operator's Manual
26-2013 1221.4 Updates of PTO control units Operator's Manual
40-2013 1221.4 Fire safety requirements
51-2013 1221.4 Updates on engine air cleaner service
30-2012 1221.4 Change of turn signal switch and dashboard design
17-2011 1221.4 Hydraulic distributor with fixed UPLIFT position Operator's manual