Updated hydraulics use less fuel


Building on years of dedicated service and performance for Australian owners and operators, Case IH has unveiled the WD4 Series self-propelled windrower with industry-leading features.

Making its Australian debut at Case IH’s Red Excellence Tour earlier this year, the WD4 Series windrower comprises three models — the WD1204 with 120hp (90kW), the WD1904 with 190 rated hp (142kW) and 199 max hp (149kW) and the WD2304 with 226 rated hp (168kW) and 235 max hp (179kW).

“We’re pleased to introduce the WD4 Series, which lives up to our goal of continually improving our products to meet changing customer demands,” Case IH product manager for hay and harvest Tim Slater said.

“The most significant upgrade in is a redesigned hydraulic system. We’ve incorporated a header hydraulic drive system that uses two pumps to power two separate circuits on the draper headers.

“One pump is used to power the header knife drive circuit, and the second powers the circuit for the reel and draper belts.”

This knife drive circuit can require significantly higher operating pressures than the reel or draper drive circuits.

The benefit of splitting the two circuits into high pressure and low pressure is that there is a reduction in the horsepower demand on the windrower.

Mr Slater said this translated into reduced fuel consumption.

“We’ve paid attention to every detail to ensure the new hydraulics truly provide an improved user experience — from maintaining easy access for servicing and better valve performance and reliability, to mechanical locks that keep control cartridges from loosening when exposed to high pressure over time,” Mr Slater said.

Enhanced steering is another improvement to the WD4 Series, with a hydraulically-controlled drive system and rear castor wheels that enable the windrower to turn on itself, almost within its own length. “We worked with NASCAR specialists, Pratt and Miller Engineering, on the design of the steering components, and angled the rear axle swivel post caster at nine degrees,” Mr Slater said.

“This allows the unit to respond to forward or reversing motions and quick turns while maintaining straight line stability.

“Self-propelled windrowers are traditionally extremely responsive to steering wheel input which at times can make them difficult to steer, but with the new hydraulic system we can incorporate AFS AccuGuide auto steering control down to 2cm accuracy.”

There are three different heads designed for the windrower — a sickle mower conditioner in 14 foot, 16ft and 18ft widths for more delicate crops, a disc mower conditioner in 16ft or 19ft widths for efficient hay cutting and a draper front in 25ft, 30ft, 36ft and 40ft widths for windrowing crops such as canola.

All WD4 units now have 1080mm of ground clearance under the tractor unit, allowing the operator to drive over swaths more easily without disturbance.

They also incorporate a powered lowering function which aids in the process of changing heads over.

The remodelled cab is another appealing feature of the WD4 Series, which utilises the deluxe cab from previous versions of the Axial-Flow combine.

Enhancements include automatic temperature control, front and rear sunshades, four speakers, windscreen washer/wipers, in-cab electric adjustable mirrors and an AFS Pro 700 display mounted on the console.

“The Multi Function Handle has commonality with the Axial-Flow combines, allowing the operator to raise the header, lower, tilt and return to cut — all without the operator removing their hand from the Multi Function Handle,” Mr Slater said.

Reel controls, header tilt, AFS AccuGuide engage and emergency stop can also all be controlled from the Multi Function Handle.

Updated to match the rest of the Case IH haytool line-up, the roof of the WD4 series has also been remodelled and lights updated to oval shaped LEDs, which give a more modern look while also improving visibility.

The WD4 Series includes a deluxe lighting package of four LED work lights and halogen lights in the roof, two rearward facing LED work lights and two LED stubble lights — forward facing mounted in front of the rear axle.

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