Specialist demolition contractors Erith Group have recently made a significant investment in new plant and equipment to add to their already extensive fleet, including Hitachi Zaxis excavators ranging through various models in the 30-50 ton class. Erith Group Director and IDE Vice President David Darsey was insistent that all the new demolition spec machines purchased were to be fitted with the OilQuick automatic quick coupler system supplied by Warrington based attachments specialists ECY Haulmark.

Having made the move initially to OilQuick back in November of 2013 Erith have since been reaping the benefits the OilQuick systems has to offer, in terms of safety for the site, operators and the increased productivity by no longer having to spend time manually changing between attachments. Come Spring of 2015 David reports that Erith Group now have nineteen of their machines fitted and operating with OilQuick.

David informs us of one particular project  Erith Group are currently involved with is  working on a six month contract in Garston, Liverpool dismantling a redundant gas holder using an Hitachi Zaxis 470LCH fitted with an OilQuick OQ80 coupler.

The complexity of the project required the need to make up to twenty five attachments changes per day between steel shear, selector grab and bucket. Erith Site Manager Matthew Balson explained exactly what was involved in dismantling the gas holder. “With limited access around the gasholder being an issue, we designed a methodology to dismantle the holder from the inside of the structure.  We firstly had to remove a section of the crown to allow access for the excavator to get inside. The central area of the chamber was made up of a series of brick pillars with a cast iron stanchion which was supporting the crown. A selector Grab and LaBounty MSD2000R steel shear were able to simultaneously demolish through the brick pillars and steel in sections at a very quick rate, thanks to the OilQuick being fitted. We then removed the outer steel walls which were 12.5 metres deep. Unfortunately due to space constraints our machine operator Paul Best could only reach to a depth of 10-11 metres with the shear. We overcame this by Paul lowering a man cage into the annulus with a burner working along and upwards to six metres height. this then allowed Paul to reach in with the LaBounty steel shear and remove sections at a time all around the inside of the holder. The inner brick wall is to be retained to allow the remaining annulus to be infilled. Once this section of the project is complete, granular infill will be used to create an access within the central container to allow for a telescopic crane to enter and begin dismantling the surrounding circular steel structure working to a height of around forty five metres”

Matthew added “without the ability to make the attachment changes so quickly this project would have taken much longer to complete or seen the need for more machines working inside of the chamber.”

David Darsey concluded by adding “We initially took the OilQuick system on a two month trial demonstration in 2013 on one of our Hitachi 280 excavators and then subsequently purchased the system. On that machine I’m pleased to say, since the OilQuick system has been on we have been totally satisfied with its performance to date carrying out heavy demolition activities using various attachments, not one hose has been replaced. Since then we have purchased a further eighteen units. This is a testament to the quality of the OilQuick product.”

Author: Karen Hawtin, Sales & Marketing, ECY Haulmark

The content of this article represents the personal views of the author and nothing is to be taken as representing the views, opinions, policy or position of any other persons or organisations mentioned herein or of The Institute of Demolition Engineers.