Recently you may have seen the above images being shared showing these excavators fitting through tight spaces and being easily transported. This is helped by their Yanmar expandable undercarriage, which once through the obstacle allows the machine to open up and give great stability during work.
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 ViO12 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. This will also aid machine access, for example the SV08 at 680mm wide will fit 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.
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
ViO12 = 830mm - 1000mm
ViO17 = 950mm - 1280mm
SV18 = 980 - 1320mm
The below video shows in simple steps just how easy it is to expand and contract the undercarriage.