Bobcat S630 M4903 Error Code
M4903 Error Code
Blue lights Output Short To Ground is the main cause of M4903 error.Particularly in colder temperatures, starter failure seems to be a problem that happens more and more. In order to determine future performance, during the beginning of the winter season, the starter mechanism should be reviewed. Clear signs of problems with a starter will likely be noticed by the operator first.
Tip For S630 Model
When the temperature is below -30 C (-20 F), hydrostatic oil must be warmed before starting. The hydrostatic system will not get enough oil at low temperatures and will be damaged. Park the machine in an area where the temperature will be above -18 C (0 F) if possible.