Snorkel SP18 - Manual (Page 40)

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Emergency Lowering
The main boom can be lowered in an emergency
using the emergency lowering knob. The
emergency lowering knob is at the base of the
control panel (refer to Figure 6.12).
Figure 6.12—Emergency Lowering Knob
Use the following procedure to test the emergency
lowering system.
1. Use the lower controls to raise the main
boom approximately 1FT (0.3 m).
2. Push the emergency stop button in.
3. Stand clear of the booms and slowly turn the
knob to open the bleed down valve. The
boom should slowly lower by gravity. Control
the rate of descent by turning the knob.
The potential for an accident increases when
safety devices do not function properly.
Death or serious injury can result from such
accidents. Fully close the emergency
lowering knob before operating the aerial
platform.
4. Turn the knob to close the cylinder bleed
down valve.
■ Level Sensor
Use the following procedure to test the level
sensor.
1. Position the aerial platform on a smooth, flat,
level surface.
2. Remove all persons and materials from the
platform.
3. Open the door on the lower control box to
access the level sensor (refer to Figure 6.13).
Figure 6.13—Level Sensor
4. Start the engine.
5. Press the main boom select button and an
extend button to extend the main boom
about 5FT to 10¢ (2 to 3 m).
6. Pull the level sensor to the side as far as
possible to activate the tilt alarm.
The potential for an accident increases when
safety devices do not function properly.
Death or serious injury can result from such
accidents. Do not alter, disable, or override
any safety device.
7. If the alarm does not sound, remove the
machine from service until the problem is
corrected.
8. Retract the main boom.
■ Flashing Lights
If the machine is equipped with optional flashing
lights, visually check to see that they flash. The
lights should flash when the machine is set up for
operation from the lower or upper controls.
■ Hostile Environment Kit
The optional Hostile environment kit protects the
cylinders from abrasion while sandblasting or from
paint overspray. Rubber covers protect each
cylinder rod as it extends and retracts. The covers
prevent sand and paint from damaging the cylinder
seals and rod.
Inspect the covers while operating the machine to
ensure they are securely fastened and completely
cover the cylinder rod.
page 7 - 6 SP17/SP18 – 11972A
Chapter 7. Pre-operational Inspection
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