Snorkel TB50 - Manual (Page 21)

TB42/TB50 – 0074923 17
This aerial work platform is manufactured with safety
devices, placards, and decals to reduce the likelihood
of an accident.
For the safety of all personnel, do not disable, modify,
or ignore any safety device.
Safety devices are included in the daily prestart
inspection.
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.
If any safety devices are defective, remove the aerial
platform from service until qualified maintenance person-
nel can make repairs.
Emergency Stop Controls
There is an emergency stop control at the lower and
upper controls.
At the lower controls, the emergency stop button is a
two-position push button (refer to Figure 4.1).
Figure 4.1 – Lower Controls
Push the emergency stop button inward to discon-
nect power to all control circuits.
Pull the button outward to restore power.
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On older machines the emergency stop is a two-
position toggle switch with a red safety guard.
Push the guard down over the toggle switch to dis-
connect power to all control circuits. Lift the guard
and push the switch up to restore power.
Note
The lower controls override the upper controls. If the up-
per control emergency stop button is engaged, the lower
controls can still be used to operate the aerial platform.
At the upper controls, the emergency stop is a two-posi-
tion push button (refer to Figure 4.2).
Figure 4.2 – Upper Controls
Push the emergency stop button inward to discon-
nect power to the upper control circuits.
Pull the button outward to restore power.
Emergency Power System
The emergency power system includes a back-up pump,
motor, and battery. Use this system to operate the boom
and turntable functions to lower the platform if the main
power system fails due to engine or pump failure.
Caution
The emergency power system is for emergency
lowering 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
operation.
Hold the engine/emergency power switch (refer to
Figure 4.1 and 4.2) downward to activate the emer-
gency power system.
Release the switch to disengage the emergency
power system.
The length of time the pump can be operated de-
pends on the capacity of the battery.
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Chapter 4 – Safety Devices
Emergency
Stop Button
Engine/Emergency
Power Switch
Ground Operation
Switch
Emergency
Stop Button
Engine/Emergency
Power Switch