I have a 1999 Hyundai robex 130LC-3 that came on backhoe controls and id like to switch it over to cat controls and can’t find much info online on how to do so. It doesn’t have a switch valve any info would be helpful thanks
Good day If you prefer to change the lines in the cabin more comprehensive information has been posted on a number of occasions, attached is the lines at the main control valve. Kind regards Uffex
Hyundai didn't include pattern change valves in their units until the -7A series of excavators. Your best bet is purchasing a pattern change valve from ebay or a local dealer. Carefully mark the hoses to the boom spool and the arm spool with zip ties or whatever is clever. Install 4 jumper hoses from the spool caps to the correct ports of the pattern changer, and then attach the hoses you removed to the corresponding ports on the pattern changer.