Chapter 7 – Prestart Inspection
34 A46JRT – 0260996
Figure 7.14 – Upper Controls
4. Turn the start switch on the front of the upper control
panel to the on position. Wait for ten seconds for the
engine to preheat.
5. Turn the start switch until the engine starts, then
release.
6. Let the engine warm to operating temperature.
Danger
Pinch points may exist between moving components.
Death or serious injury will result from becoming
trapped between components, buildings, structures,
or other obstacles. Make sure all personnel stand
clear of the aerial platform while performing the pre-
start inspection.
Warning
The potential for an accident increases when operat-
ing an aerial platform that is damaged or malfunction-
ing. Death or serious injury could result from such
accidents. Do not operate the aerial platform if it is
damaged or malfunctioning.
7. Test the platform foot switch by moving a boom
function control without stepping on the foot switch.
If movement occurs the interlock is not functioning
properly. Do not operate the machine until the prob-
lem is corrected.
8. Test the operation of each control in both directions
from the upper controls.
9. The drive range switch and maximum travel speeds
are interlocked through limit switches on the riser and
the main boom that senses the position of the booms.
• When the main boom is raised approximately 1 ½″
(3.8 cm) or extended approximately 1″ (2.5 cm),
the machine should travel in low speed only.
• To operate in high speed the booms must be
stowed.
Emergency Stop
To test the emergency stop button from the upper
controls:
1. Start the engine from the upper controls.
2. Push the emergency stop button inward to turn off
electrical power.
3. Verify that the engine shuts off and the upper control
functions do not operate.
Emergency Power
To test the emergency power system from the upper
controls:
1. Turn the battery disconnect switch on.
2. At the lower controls, pull the emergency stop button
outward and place the controls selector switch in the
upper control position.
3. At the upper controls (refer to Figure 7.14), pull the
emergency stop button outward and place the start
switch in the on position.
4. Hold the engine/emergency power switch in the
emergency power position and step on the platform
foot switch to verify operation of the aerial platform
using the emergency power system.
Horn Switch
The machine is equipped with a horn. Operate the horn
switch (refer to Figure 7.14) to ensure that it sounds to
warn personnel in the area.
Snorkel Guard
To test the Snorkel Guard system:
1. Turn the battery disconnect switch on.
2. At the lower controls, pull the emergency stop button
outward and place the controls selector switch in the
upper control position.
3. At the upper controls, pull the emergency stop button
outward (refer to Figure 7.14).
4. Step down on the platform foot switch.
5. Press down on the Snorkel Guard rail and verify that:
• the horn sounds.
• the blue light under the upper control panel
ashes.
• only main boom down and jib down functions
will operate.
6. Release the Snorkel Guard rail and the override
switch. Verify that all other machines function operate.
Horn Switch
Snorkel Guard
Start Switch
Engine/Emergency
Power Switch
Emergency
Stop Button
Override Switch
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