Snorkel TB50 - Manual (Page 44)

Chapter 7 – Prestart Inspection
40 TB42/TB50 – 0074923
3. Visually inspect all bolts and nuts fastening the
platform in place. They must be present and not
show any signs of looseness.
4. Inspect the gate(s) to be sure they are present, are
not damaged, and move freely.
Lanyard Anchors
There are two lanyard anchors below the upper control
panel (refer to Figure 7.22).
To inspect the lanyard anchors:
1. Visually inspect the lanyard anchors to make sure
they are in place and are not deformed.
2. 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.
Operating Controls
Use the following procedure to operate and test the
machine from the upper controls:
1. Turn the battery disconnect switch on.
2. At the lower controls, place the emergency stop
switch and the start switch in the on position. Place
the control selector switch in the upper control posi-
tion.
3. At the upper controls (refer to Figure 7.23), pull the
emergency stop button outward.
Figure 7.23 – Upper Controls
4. Turn the start switch on the front of the upper control
panel to start until the engine starts, then release
it.
5. 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
prestart 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.
6. Test the platform foot switch by moving a boom
function control without stepping on the foot switch.
If movement occurs the interlock is not function-
ing properly. Do not operate the machine until the
problem is corrected.
7. Test the operation of each control in both directions
from the upper controls.
8. The drive range switch and maximum travel speeds
are interlocked through limit switches on the turn-
table that senses the position of the main boom.
When the main boom is raised approximately
1½″ (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. At the lower controls, start the engine and place the
control selector switch in the upper control position.
2. At the upper controls, push the emergency stop but-
ton (refer to Figure 7.22) 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 start switch in the on position.
Place the control selector switch in the upper control
position.
3. At the upper controls (refer to Figure 7.22), pull the
emergency stop button outward and place the start
switch in the on position.


Emergency
Stop Button
Engine/Emergency
Power Switch
Start Switch