. OPERATION TROUBLESHOOTING Problem Main causes Remedy Air in rear brake circuit (between slack adjuster and rear brake) Bleed air from rear brakes (left, right). See WHEN REQUIRED.
Excessive difference in wear between left and right tires ( Replace tires) Wheel on one side tends to slip Excessive difference in division of load between left and right wheels (unbalanced load) Make load uniform Excessive deformation of disc ( Disassemble and adjust brake) IF ACCELERATOR PEDAL HAS FAILED In addition to the detector that detects the amount the accelerator the pedal is depressed, there is also a discrimination switch installed to distinguish if the accelerator pedal is being depressed or has been released.
If there is defective wiring or a failure in the accelerator pedal, and the supplied detector cannot correctly detect the amount that the accelerator pedal is depressed, the engine controller will control the engine according to the signal from the discrimination switch. When the accelerator pedal is being depressed, the engine speed is set to 1500 rpm; when the accelerator pedal is released, the engine speed is set to low idle. The engine speed may differ according to the load. Use the accelerator pedal to move the machine to a safe place, then check the failure code and contact your Komatsu distributor. When operating the accelerator pedal, use one of the two following positions:
release the pedal completely to set it to the OFF position (low idle); or depress it fully (1500 rpm). If the accelerator pedal is partially depressed, the controller may be unable to distinguish if it is being depressed or not. REMARK If the engine controller does not correctly receive the signal for the amount the accelerator pedal is depressed, the central warning lamp will flash, the alarm buzzer will sound, and user code 02 will be displayed on the character display. 3 - 152