Front Gearcase - Centralized Hilliard Adc (6X6); Operation - Polaris Sportsman 800 EFI 4x4 2012 Service Manual

FRONT GEARCASE - CENTRALIZED HILLIARD ADC (6X6)

Operation

Engaging front gearcase: The AWD switch may be
turned on or off while the vehicle is moving. AWD will not
enable until the engine rpm is below 3100 RPM. Once
enabled, the AWD remains engaged while the front
gearcase is moving and will not disengage until the rear
wheels regain traction.
Engage the AWD switch before getting into conditions
where the front wheel drive may be needed. If the rear
wheels are spinning, release the throttle before switching
to AWD.
CAUTION
Switching to AWD while the rear wheels are spinning
may cause severe drive shaft and gearcase damage.
Always switch to AWD while the rear wheels have
traction or are at rest.
With the AWD switch off the vehicle drives only the rear
wheels (2 wheel drive). When the AWD switch is
activated it engages the hilliard, locking both front axles
into all wheel drive when there is a loss of rear wheel
traction.
4x4 Engagement: When the AWD switch is activated, a
12 Vdc current charges the central coil, creating a
magnetic field. This magnetic field attracts an armature
plate keyed to a roller cage inside an external cam / ring
gear. The rpm difference between the input shaft and
front axles forces the rollers up the external cam. The
rollers engage, or "wedge" themselves between the
external cam / ring gear and output hubs that link both
front axles, resulting in true all wheel drive.
before turning the AWD switch on. If AWD is engaged
while the wheels are spinning, severe drive shaft and
Disengagement: As the front and rear wheels gain
equal traction, rotating very close to the same speed, the
transmission shaft "overdrives" the front gearcase input.
The rollers release outward, disengaging the AWD. The
vehicle is now back to rear wheel drive until the next loss
of rear wheel traction.
9924864 - 2012-2014 SPORTSMAN 800 / 6X6
© Copyright 2013 Polaris Sales Inc.
CAUTION
If the rear wheels are spinning, release the throttle
clutch damage could result.
FINAL DRIVE
7
7.21