Chapter 11 - Emergency Operation; Emergency Lowering; Towing - Snorkel TM12 Series Operator's Manual

If the main hydraulic system fails:
• The aerial platform may be lowered using the emer-
gency lowering knob.
• The machine may be towed if the drive system fails.
• Refer to Emergency Lowering, or Towing for the ap-
propriate procedure.

Emergency Lowering

Use the following procedure to lower the platform.
Warning
The potential for an accident increases when safety
devices do not function properly. Death or serious
injury can result from such accidents. Immediately
push the emergency stop button inward to disable the
control system before using the emergency lowering
system in the event of an emergency.
1. Immediately push the emergency stop button inward
to disable the control system in the event of an emer-
gency.
2. Locate the emergency lowering knob at the front of
the aerial platform (refer to Figure 11.1).
Emergency Lowering Knob
Figure 11.1 – Front of Chassis
3. Make sure there is nothing in the way to obstruct the
platform when it lowers.
Danger
Pinch points exist on the aerial platform. Death or
serious injury will result from becoming trapped
between the platform and the chassis. Make sure all
personnel stand clear while lowering the platform
with the emergency lowering knob.
4. Pull the knob outward to lower the platform. Release
the knob to stop.
TM12 – 8210027
Chapter 11 – Emergency Operation
5. Make certain the knob is fully released and the emer-
gency lowering valve is fully closed before operating
the aerial platform.

Towing

The aerial platform may be pushed or pulled after dis-
engaging the brakes. Use the following procedure to
manually disengage the brakes.
Warning
The aerial platform is free to move when the brakes
are released. Death or serious injury can result.
Re-enable the brakes before operating the aerial
platform.
1. Chock the wheels to prevent uncontrolled motion of
the aerial platform.
2. Open the door on the right side of the machine.
3. Using a 15/16" open end wrench, loosen the compres-
sion nut (refer to Figure 11.2) so the spring is loose
and the brake pads are not touching the tires.
Compression Nut
8 ¾"
to
Figure 11.2 – Inside of Hydraulic Tray
4. Do not exceed 1' per second (0.3 m/sec) when towing.
Warning
The aerial platform is free to move when the brakes
are released. Death or serious injury can result.
Re-enable the brakes before operating the aerial
platform.
5. After moving the aerial platform, tighten the compres-
sion nut until the spring measures 8 ¾" to 9" (22.2 cm
to 22.9 cm) in length from washer to washer (refer to
Figure 11.2).
9"
37