Chapter 10 - Emergency Operation; Emergency Power System; Lower Controls; Upper Controls - Snorkel TB42J Operato's Manual

If the main hydraulic system fails, the aerial platform may
be lowered and stowed using the emergency power sys-
tem. The main boom may be lowered using the emer-
gency lowering knob. The machine may be towed if the
drive system fails. Refer to Emergency Power System,
Emergency Lowering, or Towing for the appropriate pro-
cedure.

Emergency Power System

The emergency power system can be used to operate
the machine from the lower or upper controls.
A
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
battery. Do not use this system for normal opera-
tion.
Only use the emergency power system if the main power
system fails.

Lower Controls

Use the following procedure to operate the machine us-
ing the emergency power system from the lower con-
trols.
1. Place the battery disconnect switch in the on posi-
tion (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 start switch on.
3. Place the emergency stop switch in the on position.
TB42J – 0172310
Chapter 10 – Emergency Operation
Emergency
Stop Switch
Emergency
Power Switch
Figure 10.2 – Lower Controls
4. Place the controls switch in the ground position.
5. Hold the ground controls switch in the on position
while holding the engine/emergency power switch
in 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 start switch at the lower controls must be turned
on.
• the emergency stop button at the lower controls
must be in the on position.
• the controls switch at the lower controls must be in
the platform position.
Use the following procedure to operate the machine us-
ing the emergency power system from the upper con-
trols.
1. Pull the emergency stop button out (refer to Figure
10.3).
2. Turn the start switch on.
Controls Switch
Start Switch
Ground
Controls Switch
51