12. OPERATION CHECK FOR NORMAL ACTUATION OF EMERGENCY BRAKE Check when starting operations. CHECK BRAKING CAPACITY OF EMERGENCY BRAKE Check the braking capacity of the emergency brake as follows. 1. Set the air pressure to the maximum with the machine on flat ground, and move emergency brake lever 1 to the BRAKE position. 2. Set shift lever 2 to the D position, gradually raise the engine speed, and check that the machine does not move even when the engine reaches full speed. CHECK EMERGENCY STEERING Checking manual emergency steering 1. Turn the starting switch key to the ON position. 2. Turn emergency steering switch 1 ON, and check that the steering wheel can be operated for 20 seconds.
If the steering wheel cannot be operated, please contact your Komatsu distributor. Checking auto emergency steering 3. Turn the starting switch key to the START position and start the engine. 4. Check that the air pressure gauge is in the green range, then pull retarder lever 2 fully and stop the engine. 5. Turn the starting switch key to the ON position. 6. Check that the emergency motor is actuated and the steering can be operated one second after parking brake lever 3 is set to the TRAVEL position. 2-58