Combine Harvester
Poclain Hydraulics has developed an on-demand hydraulic transmission that powers the rear axle, providing the additional flotation and traction needed for harvesting in muddy conditions and/or on slopes. Poclain’s hydraulic 4WD not only prevents the combine harvesters from getting stuck, but also helps farmers boost their productivity and decrease the TCO:
- The 4WD is activated only when needed, without impacting fuel consumption when used in 2WD
- The system improves the machine’s steerability on all soil conditions, bringing the best-in-class steering angle
- Faster mobility with the benefit of reduced soil compaction - better machine controllability especially on machines using front tracks
Low maintenance:
- Reduce tire wear
- High ground clearance prevents machine damage
The solution is easy to integrate and compatible with a wide range of combine harvesters: from small to the largest machines. The solution is based on free-wheeling technology inherent to Poclain motor technology (radial pistons) and mastered with more than 30 years of field experience.
- Operational excellence with a state of the art assembly line in both Europe and the USA
- The solution is designed/validated to ease OEM’s design work : steerable MG motors, free-wheeling valve and electronic control
MG motors:
- Wheel motors: no need for complex mechanical arrangement to manage variable width - just need pipes connection with the motors
- Reliability: no twisting pipes, reinforced bearing & sealing
- Design flexibility: easily adaptable to any model of machine
- Ease of integration and mounting on the axle with C-Frame
- Best-in-class turning radius thanks to hydraulic pivot
- High speed capacity with 2 speed option
- On-the-fly engagement/disengagement
Freewheeling the rear axle allows:
- 2WD operation when field conditions are favorable
- 2WD operation when high speed is required for road transport
- 2WD operation without parasitic motor losses
- 4WD operation at field operating speeds when extra traction force is required
- Reduced pump size compared to a fulltime 4WD configuration
Freewheeling valve - used between the pump and rear axle motors to:
- Isolate the rear axle motors from the pump when in 2WD
- Connect the rear axle motors to the pump when in 4WD
