2009 Polaris Sportsman 850 XP EFI EPS Service Manual, Page 89Get this manual
COOLING SYSTEM 78Be sure bearing is fully seated in cover after Step 2, or severe crankshaft damage will result3Install new coupler hub (A) from kit onto shaftRotate impeller and check for smooth rotationRefer to the following pages for water pump assembly and torque information
Stator Cover Installation
1Orientate the pump shaft tab to line up with the stator mounting bolt closest to the CPS sensorA
Press coupler squarely onto shaft until fully seated2Rotate flywheel so coupler nut slot is in the 12:00 position