Using Full-Time Four-wheel Drive (HFWD)

Four-wheel drive enables the power train to drive all four wheels for improved traction on difficult ground conditions. Hydraulic Full-Time four-wheel drive (HFWD) is engaged at all times, and there are no operator controls.

The Full-Time four-wheel drive (HFWD) system consists of a special hydraulic powered front drive axle and rear transaxle. They are connected by two hydraulic pressure hoses and a balance hose. Hydraulic fluid is shared, and circulates between the two axles.

The transaxle hydraulic pump also supplies pressure to the front axle, which contains two independent hydraulic drive motors, for the left and right front wheels. A proportioning valve, controlled by steering linkage, adjusts the relative speed of the two front drive motors to minimize scuffing while turning.

Hydraulic fluid and filter maintenance is to be performed on both axles as a system, and not serviced independently.