2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 275Get this manual

2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 275

FINAL DRIVE FRONT GEARCASECENTRALIZED HILLIARD ADC Operation Engaging front gearcase: The AWD switch may be turned on or
release the throttle before turning the AWD switch onIf AWD is engaged while the wheels are spinning, severe drive shaft
and clutch damage could resultDisengagement: As the front and rear wheels gain equal traction, rotating very close to the
same speed, the transmission shaft "overdrives" the front gearcase inputThe rollers release outward, disengaging the AWDThe
vehicle is now back to rear wheel drive until the next loss of rear wheel traction Roll Cage Output Hubs Magnetic Coil Ring
Gear Armature Plate 4x4 Engagement: When the AWD switch is activated, 12 Vdc current charges the central coil, creating magnetic
fieldThis magnetic field attracts an armature plate keyed to roller cage inside an external camring gearThe rpm difference
between the input shaft and front axles forces the rollers up the external camThe rollers engage, or "wedge" themselves between
the external camring gear and output hubs that link both front axles, resulting in true all wheel drive 99234122012 Sportsman