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Axle Unlocked Alarm
To test the Axle Unlocked Alarm and Tipover
Hazard light do the following:
1. Start the engine from the ground control box
and stow the ATB.
2. Use the Riser Boom switch to raise the riser
boom about 6 feet (2 m). The arm (1) of the
limit switch (2) at the end of the riser should
be up as shown.
3. Manually push the arm completely down then
operate Jib DOWN while holding switch.
4. Release the Jib DOWN switch, then release
the switch arm.
When you release the arm, the Axle Unlocked
Alarm should sound and the Tipover Hazard light
on the front of the platform control box should
come on.
5. Use the Riser Boom switch to lower the riser
boom onto the limit switch. The alarm should
stop sounding and the light should go out.
If either the Axle Unlocked Alarm or Tipover
Hazard light fails to respond correctly, repeat
this test.
If either fails a second time, remove the ATB
from service IMMEDIATELY and refer the
problem to a qualified service technician.
ATB 42/50 – 0161987
page 7 - 13
7. Daily Inspection and Maintenance
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