OPERATION DETAILED CONTROLS AND GAUGES Swing Lock Switch q When not using the swing operation, e.g. in traveling, put the swing lock switch to the OFF position. q 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 direction. Switch (4) is used to lock the upper structure so it will notswing. (a) ON position: 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. (b) OFF position:
The swing lock is applied only when the swing control lever is in the neutral position, and released when operating the swing control lever. The swing lock is actuated in 7 seconds after putting the swing control lever 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. (a) ON: Lamps light up (b) OFF: Lamps go off 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. REMARK This switch (6) is an automatic return switch.
For this reason, if the switch is pressed to the ON in position (a) and released, it will return to stop position (b), but this is not an abnormality. 3-19 WARNING