N D Mechanical Services Ltd are happy to supply arm extension / 4th cylinder pipework circuits to suit most makes and type of hydraulic excavator. They are usually supplied to agricultural contractors and drainage boards for machines being used on weed cutting or drainage work. By using an electrohydraulic valve to divert the operation of the bucket cylinder to the fourth hydraulic cylinder on the arm extension. With the circuit being electrically operated the normal operation of the excavator is unaffected and the machine will work as a standard machine when the arm extension is not required. With the arm extension connected (usually by using the machine standard quick hitch) the arm extension control circuit switched on, hydraulic priority is given to the fourth hydraulic cylinder. With the addition of a dual crossline relief valve the base machine bucket ram circuit is protected from damage. By using either an electric foot pedal or spare switch on the control levers the diverter valve can be switched back to base machine bucket cylinder giving the operator control of the position of the arm extension.
Please contact our Sales Department for all your arm extension circuit requirements.
Products which are used with arm extension circuits
Hydraulic Weeding Bucket Circuits
Hydraulic Height Limiter Circuits
Hydraulic Quick Hitch Lines Kits
Hydraulic Stick / Dipper Limiter Circuits
We supply high quality machinery products of all the major types and makes at very competitive prices.
