Chapter 4 - Safety Devices; Emergency Stop Controls; Pothole Protector Skids; Drive/Lift Level Sensor Interlock - Snorkel TM12 Series Operator's Manual

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 up-
per controls. Both the lower and upper control emergency
stop buttons must be on to operate the machine.
At the lower controls, the emergency stop is a two-posi-
tion push button (refer to Figure 4.1).
Emergency
Stop Button
Figure 4.1 – Lower Controls
• Push the emergency stop button inward to disconnect
power to all control circuits.
• Twist the button clockwise to restore power.
At the upper controls, the emergency stop is a two-posi-
tion push button (refer to Figure 4.2).
• Push the emergency stop button inward to disconnect
power to the upper control circuits.
• Twist the button clockwise to restore power.
TM12 – 8210027
Chapter 4 – Safety Devices

Pothole Protector Skids

When the platform raise function is actuated at either the
lower or upper controls, the pothole protector skids auto-
matically lower just before the platform is elevated. Ground
clearance is reduced from 3" (7.6 cm) to 0.5" (1.27 cm)
when the skids lock into position (refer to Figure 4.3).
The aerial platform can tip over if it becomes unstable.
Death or serious injury will result from a tip-over ac-
cident. Do not drive or position the aerial platform for
elevated use within four feet of any drop-off, hole, or
other tip-over hazard.
This protection system limits the tilt angle if a wheel is
driven into a drop-off or hole. This greatly reduces the
likelihood of the aerial platform tipping over.
The pothole protection system is for added protection and
does not justify operating near drop-offs or holes.

Drive/Lift Level Sensor Interlock

The aerial platform drive and lift functions are interlocked
through a level sensor system. The drive/lift level sensor
interlock operates when the platform is elevated approxi-
mately 6' (1.8 m).
Emergency
Stop Button
Figure 4.2 – Upper Controls
Pothole Protector Skid
Figure 4.3 – Pothole Protector Skids
Danger
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