Snorkel TB42J, Operato'S Manual

Page: 56 / 68

Chapter 10 – Emergency Operation
52 TB42J – 0172310
3. Step down on the platform foot switch (refer to Figure
10.4).
Figure 10.4 – Platform Foot Switch
4. Hold the engine/emergency power switch in the emer-
gency power position.
5. Hold the appropriate function toggle switch in the
desired direction.
Emergency Lowering
The main boom can be lowered in an emergency using
the emergency lowering knob at the base of the lift cylin-
der. The emergency lowering knob allows the main boom
to be lowered only. Only use this method if the engine
will not start and the emergency power system will not
work.
A
Danger
Pinch points exist between boom components and
between the booms and turntable. Death or serious
injury can result if the booms or platform lowers
onto personnel. Make sure all personnel stand clear
while lowering the booms.
Use the following procedure to manually lower the main
boom.
1. Slowly turn the knob (refer to Figure 10.5) to open
the bleed down valve. Control the rate of descent by
turning the knob.
Figure 10.5 – Emergency Lowering Knob
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.
2. Turn the knob to close the cylinder bleed down valve.
Figure 10.3 – Upper Controls
Top
Front
Emergency
Stop Button
Master Start Switch
Emergency
Lowering Knob
Engine/Emergency
Power
Platform Foot
Switch