1985-1995 Polaris ATV and Light Utility Hauler Service Manual, Page 182Get this manual
FINAL DRIVE SYSTEM SERVICE Demand OperationMechanical Hubs, 1987-1988 In the Polaris Demand Drive System, the machine operates as two wheel drive vehicle as long as the front wheel rotational speed remains greater than the front drive axle speedIf the rear wheels lose traction the front wheel rotational speed will decrease, causing the front axle speed to become greater than the front wheel speedThe roller cage plungers contact the strut ramps, restricting the rotation of the roller cage and causing front wheel engagementThe rollers will then climb the ramps, becoming squeezed between the ramps and the ring in the hub, and engaging the hub,Once the wheel hub, Demand clutch assembly and axle are engaged, the front wheels will drive and will stay engaged until the rear wheel traction is regainedWhen rear wheel traction is regained, the front wheels will overdrive the front drive shaft, pushing the clutch rollers toward the lower part of the cam and disengaging the Demand clutchWARNING: It is important that the front and rear axle drive ratio and tire size are not changedChanging this ratio will cause erratic engagement, which could result in serious injury or death