2008 Polaris ATV Sportsman 300 400 H.O. Service Manual, Page 46Get this manual
MAINTENANCE Suspension Inspection
Compress and release the suspensionDamping should be smooth throughout the range of travel Check all suspension components and fasteners for wear or damage Inspect shocks for leakage
BRAKE SYSTEM
Brake Fluid Inspection
The following checks are recommended to keep the brake system in good operating conditionService life of brake system components depends on operating conditionsInspect brakes in accordance with the maintenance schedule and before each ride Keep fluid level in the master cylinder reservoir to the indicated level inside reservoir
Suspension Spring Preload Adjustment
The front and rear shock absorber springs are adjustableRotate the adjuster cam either direction to increase or decrease spring tensionAlways adjust both sides equallyOperator weight and vehicle loading affect suspension spring preload requirementsUsing Spanner Wrench (PN 2870872) to adjust as necessary to avoid bottoming of the shocksFront Adjustment