Chapter 10 - Emergency Operation; Emergency Power System; Lower Controls; Upper Controls - Snorkel TB66JRT Operator's Manual

If the main hydraulic system fails, the aerial platform
may be lowered and stowed using the emergency
power system. The main boom may be lowered using
the emergency lowering knob. The machine may be
towed at slow speeds using the optional tow kit if the
drive system fails.
Refer to Emergency Power System, Emergency Lower-
ing, or Towing for the appropriate procedure.

Emergency Power System

The emergency power system can be used to operate
the machine from the lower or upper controls.
Caution
The emergency power system is for emergency low-
ering and stowing only. The length of time the pump
can be operated depends on the capacity of the bat-
tery. Do not use this system for normal operation.
Only use the emergency power system if the main power
system fails.

Lower Controls

Use the following procedure to operate the machine using
the emergency power system from the lower controls.
1. Place the battery disconnect switch in the on position
(refer to Figure 10.1).
Battery Disconnect Switch
Figure 10.1 – Battery Disconnect Switch
2. Place the key in the start switch (refer to Figure 10.2)
and turn the switch to the on position.
3. Pull the emergency stop button outward.
4. Place the control selector switch in the lower controls
position.
TB66J – 0083740
Chapter 10 – Emergency Operation
Control Selector
Switch
Emergency
Stop Button
Start Switch
Figure 10.2 – Lower Controls
5. Hold the ground operation switch upward to the
on position while holding the engine/emergency
power switch downward to the emergency power
position.
6. Hold the appropriate function toggle switch in the
desired direction.

Upper Controls

For the upper controls to be operational:
• The battery disconnect switch must be in the on
position.
• The emergency stop button at the lower controls
must be in the on position.
• The start switch at the lower controls must be in the
on position.
• The control selector switch at the lower controls
must be in the upper control position.
Use the following procedure to operate the machine using
the emergency power system from the upper controls.
1. Pull the emergency stop button outward (refer to
Figure 10.3).
2. Turn the start switch on.
Engine/Emergency
Power Switch
Ground Operation
Switch
63