Snorkel TB65J - Manual (Page 35)

Chapter 7 – Prestart Inspection
TB65J – 0084248 3
Figure 7.14 – Level Sensor
5. Pull the level sensor to the side as far as possible to
activate the tilt alarm.
Warning
The potential for an accident increases when safety
devices do not function properly. Death or serious
injury could result from such accidents. Do not alter,
disable, or override any safety device.
6. If the alarm does not sound, remove the machine
from service until the problem is corrected.
7. Lower the main boom.
Structures
Visually inspect all weldments and related components.
It is important to inspect the fasteners that connect the
components.
Weldments
To inspect the weldments:
. 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 7.5)
between the main and tip boom sections.
Level Sensor
Use the following procedure to test the emergency lower-
ing system.
. Use the lower controls to raise the main boom.
2. Turn the engine off.
Danger
Pinch points may exist between moving components.
Death or serious injury can result from becoming
trapped between components. Stand clear of moving
components while test operating the machine.
3. Slowly turn the knob (refer to Figure 7.3) counter-
clockwise to open the bleed down valve. The boom
should slowly lower by gravity.
Figure 7.13 – Emergency Lowering Knob
Warning
The potential for an accident increases when safety
devices do not function properly. Death or serious
injury can result from such accidents. Fully close
the emergency lowering knob before operating the
aerial platform.
4. Turn the knob clockwise to close the cylinder bleed
down valve.
Level Sensor
Use the following procedure to test the level sensor:
. Position the aerial platform on a smooth, flat, level
surface.
2. Remove all persons and materials from the plat-
form.
3. Start the engine and raise the main boom above
horizontal, approximately 5 to 20 degrees.
4. Open the door on the left side of the machine to ac-
cess the level sensor (refer to Figure 7.4).
Emergency
Lowering Knob