2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 37Get this manual
MAINTENANCE Radiator Coolant Level WARNING
Never remove the radiator pressure cap when the engine is warm or hotEscaping steam and fluid can cause severe burnsThe engine must be allowed to cool before removing the pressure capNOTE: This procedure is only required if the cooling system has been drained for maintenance andor repairHowever, if the recovery bottle has run dry, or if overheating is evident, the level in the radiator should be inspected via the radiator cap first and coolant added if necessaryNOTE: Use of non-standard pressure cap will not allow the recovery system to function properlyTo Access the Radiator Pressure Cap: 1Open the front rack storage area2Remove the (4) T-25 screws securing the access cover to the front cab as shown below4The pressure cap is now accessible3Move the seal out of the sealing channel and pull up on the front of the access coverRemove the access cover