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8.3
BOOM INTERLOCK
A. Boom Interlock System Test
Boom interlock system operates in three modes. With boom at any extension and angle
below 20 degrees, outrigger and frame level functions are operable. With boom fully
retracted and raised between 20 and 55 degrees, outriggers and frame level are operable.
With boom at any extension and raised above 55 degrees, outriggers and frame level are
not operable. To check the system, perform the following:
1. Test system with machine on a level surface and no load.
2. Shift transmission to neutral and engage park brake.
3. Ensure outriggers and frame level functions are properly functioning. Lower then
raise outriggers. Rotate frame in each direction.
4. Keep outriggers raised and level machine using level in cab.
5. Raise boom to between 20 and 55 degrees and extend approximately
1 m (39 in).
6. Attempt to lower outriggers then rotate frame. Neither function should respond.
7. Fully retract boom and raise above 55 degrees.
8. Attempt to lower outriggers then rotate frame. Neither function should respond.
9. Lower boom fully.
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Section 8 - Additional Checks
10
OW0970
8-3
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