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Chapter 7 – Prestart Inspection
accidents. Do not operate the aerial platform if it is
damaged or malfunctioning.
6. Test the operation of each function in both directions.
Note
When checking the turntable rotation function in the coun-
terclockwise direction, the turntable will rotate toward you.
Emergency Stop
To test the emergency stop button from the lower
controls:
1. Push the emergency stop button inward to turn off
electrical power.
2. Test the lower control functions to make sure they do
not operate.
Emergency Power
To test the emergency power system from the lower
controls:
1. Place the battery disconnect switch and the emer-
gency stop button in the on position. Place the control
selector in the lower control position.
2. Hold the engine/emergency power switch down
and the ground operation switch upward to operate
the aerial platform from the lower controls using the
emergency power system.
Diagnostic Center Display
To test the diagnostic center display on the lower
control panel (refer to Figure 7.10), from the lower
controls:
1. Turn the battery disconnect switch on.
2. Pull the emergency stop button outward to the on
position.
3. The display on the LCD screen should indicate:
y The accumulated aerial platform operating time.
y "Mode Neutral" when no functions are being
operated. When the machine is operated, the
display will indicate the name of that function.
Flashing Lights
The machine may be equipped with two optional flashing
lights mounted to the top of the counterweight.
To inspect the flashing lights:
1. At the lower controls, pull the emergency stop button
outward and turn the controls selector switch to the
lower control position. Start the engine. Hold the
ground operation switch upward to verify operation
of the lights.
32
2. Turn the controls selector switch to the upper control
position.
3. At the upper controls, pull the emergency stop button
outward and turn the start switch to the on position.
Step on the foot switch to verify operation of the lights.
Note
There is not an off switch for the flashing light. The light
cannot be turned off.
Structures
Visually inspect all weldments and related components.
It is important to inspect the fasteners that connect the
components.
Weldments
To inspect the weldments:
1. Visually inspect all weldments for abnormal wear,
abrasion, or deformation that could cause interfer-
ence between moving parts.
2. Inspect the welds on the structural components.
Pay particular attention to boom welds. The area to
be inspected should be clean and free of dirt and
grease.
3. Look for visible cracks in the welds and at the weld
to parent material joints. A bright light may be used
to provide adequate visibility of the inspection area.
Boom Slide Pads
The main boom has slide pads (refer to Figure 7.11)
between the main and tip boom sections.
Slide Pads
Figure 7.11 – Slide Pads at Tip End of Boom
To inspect the slide pads:
1. Use the lower controls to position the main boom near
horizontal. Extend the tip boom about 1' (30 cm).
A46JRT – 0260996
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