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XLB-4319
4-18
4-6 LIM
Adjusting Boom Down Limit Switch
When th
The boom ggers. The boom
down limit switch should trip when the lower boom is within 2 inches (50 mm) of seating
on the trailer tongue. You may not be able to extend or retract the outriggers if the boom
down limit switch is loose, damaged, or not adjusted properly.
Use the following procedure to readjust the boom down limit switch:
1. Lower the outriggers and raise the lower boom for free access to the limit
switch, Figure 4-12.
2. Inspect the limit switch for loose mounting or visible damage. If the mounting
hardware is loose, tighten the hardware. If the limit switch is damaged, replace
the limit switch.
3. Measure the free height of the limit switch actuator roller. The top of the roller
should be 0.75 inch (19 mm) above the limit switch mounting plate. Adjust the
actuator position as needed.
4. Fully lower the upper and lower booms.
5. Press the outrigger run pushbutton to verify that the boom down limit switch is
engaged. The hydraulic pump motor should run when the outrigger run pushbut
ton is pressed.
6. If the pump motor does not run, the limit switch or switch wiring is damaged.
Repair or replace a damaged limit switch or wiring, as needed.
IT SWITCH CHECKS AND ADJUSTMENTS
e upper and lower booms are retracted, the boom down limit switch is actuated.
down limit switch must be actuated to lower or raise the outri
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Figure 4-12. Boom Down Limit Switch