Working machine and management system for working machine

A working machine comprising:

• a lower traveling body capable of traveling;
• an upper swivel body rotatably mounted on the lower traveling body;
• a work attachment attached to the upper swivel body;
• an actuator configured to drive the work attachment;
• a physical quantity detector;
• circuitry configured to calibrate the physical quantity detector;
• and
• a transceiver configured to transmit a calibration result of the physical quantity detector to a management server that is located outside the working machine,
• wherein the physical quantity detector includes a weight detector configured to detect a weight of a load loaded on the work attachment,
• the work attachment includes a boom mounted to the upper swivel body capable of lifting,
• the actuator includes a plurality of hydraulic cylinders,
• the weight detector includes an attitude detector configured to detect an attitude of the work attachment, and a pressure detector configured to detect a pressure of hydraulic fluid in at least one of the plurality of hydraulic cylinders,
• the calibration result includes a calculated center of gravity position of the work attachment calculated based on a detection result of the pressure detector when a predetermined operation is performed with the work attachment without load in a predetermined attitude,
• the calculated center of gravity position is calculated based on the detection result of the pressure detector, and a shape parameter input by an operator;
• and
• the transceiver is configured to transmit the shape parameter to the management server in addition to the calibration result.