2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 253Get this manual
CLUTCHING 11Place the clutch into the Universal Clutch Compressor Tool PU-50518Press down on the top of the spider assembly, pushing the spider onto the shaftPU-50518 12Slowly compress the spider into placeIf the spider appears to bind while compressing, stop and make sure the skip tooth on the shaft and the spider are alignedOnce the spider passes the retaining ring notch on the shaft, install the retaining ring
Press down on spider