| 摘要 |
PROBLEM TO BE SOLVED: To provide a maintenance time display device capable of displaying a time for replacing engine oil, hydraulic oil and a filter without providing a means for detecting an actual operating time for machines including an engine rotation sensor and a pressure sensor. SOLUTION: A device includes a keyswitch 1 for starting/stopping an engine, a battery relay 3 operated by turning the keyswitch 1 on/off, a controller 4 for computing and storing a machine operating time, a battery 2 for supplying power to the controller 4, and a display 5 for displaying the machine operating time. The display 5 is connected to the controller 4 and the battery 2 is connected to the controller 4 via the battery relay 3 to accumulate a time for power supply from the battery 2 to the controller 4 and display to the display 5 an accumulation value for a time for supplying power to a controller power supply 4a when reaches a replacement time previously stored in storages 4c, 4d of the controller 4.
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