Snorkel TB47J - Manual (Page 33)

Chapter 7 – Prestart Inspection
TB47J – 0075182 29
A
Danger
The aerial platform can tip over if it becomes un-
stable. Death or serious injury will result from a tip-
over accident. Do not operate the aerial platform if
a tire is leaking air or is in poor condition where a
blow out could occur.
Test the air pressure with a pressure gauge to make sure
the tires are properly inflated. Check the tires several
times throughout the day to see that they are properly
inflated.
Foam Filled
Inspect for large holes or cuts where foam is coming out
of the tire. Look for large imbedded objects, such as angle
iron, that can rip a tire open.
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 7.11).
Figure 7.11 – 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 and place the control selector switch in
the ground position.
3. Insert the key into the master switch and turn the
switch to start until the engine starts, then release.
4. Let the engine warm to operating temperature.
5. Hold the ground operation switch upward.
A
Danger
Pinch points may exist between moving compo-
nents. Death or serious injury will result from be-
coming trapped between components, buildings,
structures, or other obstacles. Make sure all person-
nel stand clear of the aerial platform while perform-
ing the prestart inspection.
6. Test the operation of each function in both directions.
Note
When checking the turntable rotation function in the
clockwise direction, the turntable will rotate toward you.
Emergency Stop
Push the emergency stop button in to turn off the engine.
The lower control functions should not operate with the
emergency stop in this position.
Emergency Power
Place the battery disconnect switch, the emergency stop
button, and the master switch in the on position.
Hold the engine/emergency power switch in the emer-
gency power position and the ground operation switch in
the on position 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 7.12).
Use the following procedure to test the emergency lower-
ing system.
1. Use the lower controls to raise the main boom.
Emergency
Stop Button
Control Selector
Switch
Ground Operation
Switch
Start Switch
Emergency
Power Switch