Bobcat 853 M4521 Error Code
M4521 Error Code
Water In Fuel Sensor Out of Range High is the main cause of M4521 error.A significant number of consequences can be suffered due to an overheating engine with code M4521. The problem might be a blown gasket or something related to the fuel tank.
Tip For 853 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.