The new Case IH WD4 Series self-propelled windrower is now available, with several improvements and redesigned features from its predecessor.
The most significant improvement over the successful WD3 Series is an updated hydraulic system, a remodelled cab, and a new steering system.
After its debut at the Case IH Red Excellence Tour, the WD4 has now been released as three different models:
- 120hp WD1204
- 190hp WD1904
- 226hp WD2304
Case IH hay and harvest product manager Tim Slater says the WD3 is still the basis for the WD4, but with several major improvements.
“Following the success of the WD3, we’re pleased to introduce the new and improved WD4 Series which lives up to our goal of continually improving our products to meet changing customer demands,” he says.
“The most significant upgrade in the WD4 Series 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.”
On top of this, Case IH also used hydraulics to improve the steering, as Slater says windrowers can be a challenge to control in some conditions.
“We worked with NASCAR specialists Pratt & Miller Engineering on the design of the steering components, and angled the rear axle swivel post caster at nine degrees, which allows the unit to respond to forward or reversing motions and quick turns while maintaining straight line stability,” Slater says.
“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 now incorporate AFS AccuGuide auto steering control down to two centimetre accuracy.”
The new WD4 will accommodate three different heads which have been designed for it:
- A sickle mower conditioner for more delicate crops
- A disc mower conditioner for efficient hay cutting
- A draper front for windrowing crops such as canola
The WD4 also has a ground clearance of 1080mm, allowing it to avoid disturbing formed swaths.
The new cab is also a focus for Case IH, with features from the deluxe cab used on previous versions of the Axial-Flow combine.
“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,” Slater says.
Case IH says other improvements and changes include a remodelled roof with more LED lights, electric adjustable mirrors, and sunshades on the front and rear.