Snorkel TB47J - Manual (Page 34)

Chapter 7 – Prestart Inspection
30 TB47J – 0075182
Figure 7.12 – Emergency Lowering Knob
2. Turn the engine off.
A Danger
Pinch points may exist between moving compo-
nents. Death or serious injury will result from be-
coming trapped between components. Stand clear
of moving components while test operating the ma-
chine.
3. Slowly turn the knob to open the bleed down valve.
The boom should slowly lower by gravity.
A
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 to close the cylinder bleed down valve.
Level Sensor
Use the following procedure to test the level sensor.
1. Position the aerial platform on a smooth, flat, level
surface.
2. Remove all persons and materials from the platform.
3. Start the engine and raise the main boom to just
above horizontal.
4. Open the rear door on the left side of the machine to
access the level sensor (refer to Figure 7.13).
Figure 7.13 – Level Sensor
5. Pull the level sensor to the side as far as possible to
activate the tilt alarm.
A
Warning
The potential for an accident increases when safety
devices do not function properly. Death or serious
injury can 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.
Flashing Light
If the machine is equipped with an optional flashing light,
visually check to see that it flashes. The light should
flash when the engine is running.
Sandblast Protection Kit
The optional sandblast protection kit protects the cylin-
ders from abrasion while sandblasting or from paint
overspray. Rubber covers protect each cylinder rod as it
extends and retracts. The covers prevent sand and paint
from damaging the cylinder seals and rod.
Inspect the covers while operating the machine to ensure
they are securely fastened and completely cover the cyl-
inder rod. Make sure there are no holes in the covers.
Structures
Visually inspect all weldments and related components.
It is important to inspect the fasteners that connect the
components.
Weldments
Visually inspect all weldments for abnormal wear, abra-
sion, or deformation that could cause interference be-
tween moving parts.
Emergency
Lowering Knob