Polaris Sportsman 550 Touring, Sportsman 850 Owner's Manual

To check the engine oil level, park the ATV on a level surface and allow the engine to cool. Remove the dipstick, wipe it clean, reinsert it without screwing it in, then remove it again to check the oil level. The oil should be between the safe marks on the dipstick.
Use a high-quality ethylene glycol-based antifreeze coolant that is specifically designed for aluminum engines, following the manufacturer's recommendations.
Check the battery connections for corrosion, ensure the battery is fully charged, inspect the ignition switch and starter connections, and verify that the fuel supply is adequate.
The recommended tire pressure for the Sportsman 850 is typically around 5 psi for both front and rear tires, but it is best to consult the owner's manual for specific guidance.
The air filter should be inspected every 50 hours of operation and replaced if it appears dirty or damaged. More frequent maintenance may be required in dusty conditions.
If your Sportsman 850 overheats, allow the engine to cool, check the coolant level, inspect the radiator for obstructions, and ensure the cooling fan operates properly.
Regularly check the brake fluid level, inspect the brake pads for wear, and ensure the brake lines are free of leaks or damage. Adjust the brakes as necessary according to the service manual.
Check the headlight bulbs for burnout, inspect the wiring for damage, ensure the headlight switch is functioning, and check the related fuses.
To store your Sportsman 550 Touring for winter, clean the ATV thoroughly, change the oil and filter, stabilize the fuel, disconnect the battery, and store it in a dry place. Cover it with a breathable cover.
Common signs include clicking noises when turning, grease on the edges of the tires, and vibrations during acceleration. Regular inspection and maintenance can prevent joint failure.