2010 Polaris Sportsman 850 Service Manual, Page 284Get this manual
STEERINGSUSPENSION 11Remove the (4) mounting fasteners that retain the power steering unit to the frame
EPS Unit Installation
12Position the vehicle so the front wheels are pointing straight forwardClean the lower steering post so the alignment mark is visibleMark the skip tooth spline on the lower power steering shaftApply anti-seize to the shaft splines to aid assemblyAlign the two marks and install the power steering unit (see Figure 10-1)Figure 10-1