Snorkel TB50 - Manual (Page 40)

Chapter 7 – Prestart Inspection
36 TB42/TB50 – 0074923
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 preforming prestart
inspection.
Warning
The potential for an accident increases when operat-
ing an aerial platform that is damaged or malfunc-
tioning. Death or serious injury could result from
such accidents. Do not operate the aerial platform
if it is damaged or malfunctioning.
6. Test the operation of each function in both direc-
tions.
Note
When checking the turntable rotation function in the clock-
wise direction, the turntable will rotate toward you.
Emergency Stop
To test the emergency stop button from the lower con-
trols:
1. Push the emergency stop button (refer to Figure
7.12) 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, the emergency
stop switch and the start switch in the on position.
2. Hold the engine/emergency power switch (refer to
Figure 7.12) downward and the ground operation
switch upward to operate the aerial platform from the
lower controls using the emergency power system.
Emergency Lowering
The main boom can be lowered in an emergency using
the emergency lowering knob. The emergency lowering
knob is at the base of the main boom lift cylinder (refer
to Figure 7.13).
Use the following procedure to test the emergency
lowering system.
1. Use the lower controls to raise the main boom.
2. Turn the engine off.
2. Carefully inspect for large holes or cuts where foam
is coming out of the tire.
3. Look for large imbedded objects, such as angle iron,
that can rip a tire open.
Note
Punctures caused by bolts, screws, or nails are not a
problem for foam filled tires.
Lower Control Station
With no personnel in the platform, test the operation
of each control from the lower controls (refer to Figure
7.12).
Figure 7.12 – Lower Controls
Operating Controls
Use the following procedure to operate the machine
from the lower controls.
1. Turn the battery disconnect switch on.
2. At the lower controls, pull the emergency stop but-
ton outward. Place the control selector switch in the
lower control position.
3. Insert the key in the start switch and turn until the
engine starts, then release it to on.
4. Let the engine warm to operating temperature.
5. Hold the ground operation switch upward.
Emergency
Stop Button
Engine/Emergency
Power Switch
Ground Operation
Switch
Control Selector
Switch
Start Switch