OPERATION EXPLANATION OF COMPONENTS SWING LOCK SWITCH WARNING When traveling or when not using the swing operation, apply the swing lock. On slopes, even when the swing lock switch is at the ON position, the weight of the work equipment may cause the upper structure to swing if the swing control lever is operated in the downhill direc- tion. This switch (4) is used to lock the upper structure so that it can- not swing. ON position (actuated): The swing lock is always applied, and the upper structure will not swing even if the swing is operated. In this condition, the swing lock lamp lights up.
OFF position (canceled):The swing lock is applied only when all the control levers of the work equipment are at neutral; when any of the control levers is operated, it is cancelled. The swing lock is actuated approx. 5 seconds after all the control levers are placed in the neutral position. LAMP SWITCH This switch (5) is used to light up the front lamps, working lamp, additional lamp at the top front of the cab, rear lamp, and moni- tor lighting. ALARM BUZZER STOP SWITCH This switch (6) is used (when the engine is running) to stop the alarm buzzer when it has sounded to warn of an abnormality in a warning item. 3-19