Polaris Sportsman 550 EFI Owner's Manual page 95

Active Descent Control (ADC) Fluid
Fluid Change
1. Position the vehicle on a level
surface. Before performing the
fluid change, allow the vehicle
to sit for at least 30 minutes.
2. Thoroughly clean the areas
around and on the ADC
reservoir and bleeder valves
(one on each side of the
differential).
3. Remove the reservoir cap and
diaphragm assembly. Use a
shop towel or suction tool to
remove debris from the fluid
and reservoir. Debris in the
reservoir may result in
inadequate bleeding and
reduced performance of the
system.
4. Fill the reservoir to the maximum line with fresh ADC fluid.
5. Remove the protective caps from the bleeder valves.
6. Slowly loosen one of the screws (turn counter-clockwise) and allow
fluid and trapped air to flow from the fitting. Tighten the screw
when clean fluid begins to flow. Repeat this step for the remaining
valve.
IMPORTANT: Close the bleeder valves before the reservoir fluid level drops
below the minimum fill line. Adding fluid to an empty reservoir will result in
trapped air. If the level drops below the minimum line, add fluid to the maximum
line and repeat step 6 before proceeding.
7. Torque the valves to 80 in. lbs. (9 Nm). Reinstall the valve caps.
8. Add fresh ADC fluid to the reservoir until the level is between the
minimum and maximum marks. Make sure the reservoir is free of
debris.
9. Reinstall the cap securely. Clean up any drips or spills.
MAINTENANCE
Bleeder
Screw
Cap
Bleeder
Valve
Screw
91