2008 Polaris ATV Sportsman 300 400 H.O. Service Manual, Page 119Get this manual
BODYSTEERINGSUSPENSION Refer to illustration on page 5.10123456Apply parking brake and loosen the lug nutsElevate and safely support the front of the machine with jack stands and block the rear wheelsRemove the tirewheel from the wheel hub and release the parking brakeRemove the pinch bolt (10) and nut (1) that hold the A-Arm ball joint (5) to the front carrier bearing assemblyRemove the flange bolt (12) and flange nut (13) from the frameRemove A-ArmThe driver must fit the inside diameter of the A-arm endCorrect Driver Placement
WARNING
The locking features on the existing bolts were destroyed during removalDO NOT reuse old boltsSerious injury or death could result if fasteners come loose during operationBall Joint Replacement
Refer to illustration on page 5.10123The A-arm (7) must be removed to perform this procedure (see "A-arm Removal")Using snap-ring pliers, remove the retaining ring (4) from the ball joint (5)A driver must be used for the removal of the ball jointUse the dimensions below to fabricate or locate the correct size driver to use in the following processDriver Dimensions 1.375 in(3.49 cm)