2008 Polaris ATV Sportsman 300 400 H.O. Service Manual, Page 37Get this manual
MAINTENANCE Cooling System Pressure Test
Refer to Chapter for cooling system pressure test procedure23Carefully straighten any bent radiator finsRemove any obstructions with compressed air or low pressure water
Cooling System Hoses
1Inspect all hoses for cracks, deterioration, abrasion or leaksReplace if necessaryRecovery Bottle From Engine Thermostat
CAUTION
Washing the vehicle with high-pressure washer could damage the radiator fins and impair the radiators effectivenessUse of high-pressure washer is not recommended
Filler Neck Clamp
Coolant DrainRadiator Removal
Coolant Drain
Open front storage box cover to access the pressure cap
WARNING