1-13
[3] OUTRIGGER MIDWAY EXTENSION
• Make sure all the outriggers are placed properly before performing crane operation.
This machine features a safety-interlock system that prevents crane operation unless all the
lamps, other than the boom retraction lamp on the outrigger monitor, are on.
• Always place the machine in a horizontal position with the use of the level when extending the
outriggers. A warning buzzer sounds when the machine is inclined 3° or more and stops when
the machine is placed in a horizontal position.
• When the crane is used with the outriggers extended other than at the maximum, crane
operation should proceed with respect to the values specified in the rated total load chart
corresponding to “When the crane is used with the outriggers extended at the
minimum/midway”.
Failure to perform crane operation with proper values may cause the machine to topple over.
Exercise caution when performing operation.
• Despite the midway extension of all the outriggers, the
width of extended outriggers decreases due to an
ungraded ground even when clearance "a" in the right
figure is 50 mm.
Crane operation should proceed with respect to the
values specified in “When the crane is used with the
outriggers extended at the minimum” in the rated total
load chart.
• The machine becomes unsteady at some point if it
undergoes a 360-degree slewing with an object hoisted.
Irrespective of the rated total load, ensure operation in a
short working radius and at low speed.
The figure shown at right represents the condition “When the
crane is used with the outriggers extended midway” in the rated
total load chart.
NOTES
Outrigger midway extension is defined as that:
1. The outrigger is set at the positioning pin position (40° front,
30° back).
2. The inner box of all the outriggers is extended midway.
3. All the outriggers are placed on a level surface.
4. Approx. 50mm is assured for clearance “a” (between the
outrigger bottom and crawler bottom) in the figure at right.
NOTES
If even a group of outriggers is retracted to a midway point, all
the outriggers are deemed to be extended midway.
To Next Page
Loading...
