WM Donald opts for GKD system on new excavator

THE latest addition to WM Donald’s fleet is a 40-tonne Doosan DX80LC excavator, bought from Balgownie.

The Netherley-based civils and construction contractor has had the machine fitted with a Trimble CB460 control unit transferred from a previous excavator.  The digger has also been equipped with a GKD Technologies height restrictor system, with a purple roof beacon forming part of the 1HLi boom height restricting system.

Willie Donald, who founded the company 42 years ago said “When it comes to selecting machines, there are a number of factors that influence the choice of any machine, and the level of specification offered in relation to price is vital. But of even more importance is the commitment to service and the proximity to the dealer.”

He added that the GKD system was chosen partly because it is simple and effective in use, and it provides an appropriate height cut-off even when the excavator is positioned on a slope.

GKD said the common way such systems work is that sensors measure the boom height in relation to the base machine. The GKD approach is the use of a single gravity referenced angle sensor on the boom, which measures boom height from the ground level. Upon reaching the pre-selected height limit, a hydraulic solenoid valve prevents any further lifting of the boom.

The Doosan has already been put to work on a large residential development project on the outskirts of Dundee, assisting in tasks such as site clearance and earthworks to facilitate the construction of an access road network and attenuation ponds.