Four models in our range of Yanmar excavators come with extendable undercarriage as standard. The machines with this feature are the semi zero tail swing SV08 and SV18 as well as the zero tail swing ViO10 and ViO17.
The operator can switch from the open frame configuration for increased stability, down to the closed frame to work in tight spots or reduced lanes. In the case of the SV08 this can be to travel through a standard doorway.
The beauty of this feature is not just the added versatility it gives but the ease in which the adjustments can be made. An accessible lever controls the enlargement of the chassis with the blade extension being operated by folding the additional length out from the blade and pinning it in position. This function requires no tools and means that the parts stay attached to the machine at all times, reducing the likelihood of lost parts.
You can watch a video of this very operation taking place on a ViO17 by clicking the below link:
Yanmar have also reduced the clearance between the sliding undercarriage parts, thus meaning no build up of soil or mud during the extension and retraction.
The changes in machine widths of the excavators are as follows:
SV08 = 680mm - 840mm
ViO10 = 830mm - 1000mm
ViO17 = 950mm - 1280mm
SV18 = 980 - 1320mm