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Arm extension circuits

Arm extension circuits 

N D Mechanical Services Ltd are happy to supply arm extension / 4th cylinder pipe work 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