GENERAL INTRODUCTION EXPLANATION OF CX SERIES CX130/CX160/CX210/CX240 Hydraulic System There is a single main relief with a second (power boost) setting. Boom and arm anti-drift valves are built into the main control valve. An auxiliary control valve is standard and a factory installed or field installed kit with plumbing to the end of the arm is available. Other features that are built into the main control valve are:
Dual flow boom up Boom down regeneration Boom down anti-drift Dual flow arm Arm in regeneration Arm in anti-drift Travel priority Swing priority Neutral pump de-stroke Two electrical pressure switches are installed on the main control valve, and one in the swing pilot shuttle valve. These switches are used to tell the controller what hydraulic functions are being operated. Cushion Control System The CX Series units have an attachment control cushion system to allow the boom and arm cylinder control spools to gradually return to neutral, for shock-free operation. This feature allows a lesser skilled operator to work more smoothly.
With the control cushion system active, the pilot oil from the hand control flows to the arm or boom control spool unrestricted. When the hand control is returned to neutral, the pilot oil is restricted as it leaves the control spool. This slow return of the spool accounts for the smooth operation. The system can be overridden with an electrical control switch on the monitor/switch panel. Swing The CX Series Excavators do not have a mechanical house lock. The house lock is accomplished with the swing brake. Swing lock or (100%) brake is applied when the switch on the left console is activated or the engine is shut off.
The swing brake is applied 5 seconds after the control is returned to neutral. 1 - 7 CX EXCAVATORS