Chapter 7 – Prestart Inspection
SL30SL – 8210037 25
Figure 7.10 – Emergency Lowering Knob
Use the following procedure to test the emergency lower-
ing system:
Danger
Pinch points may exist between moving components.
Death or serious injury will result from becoming
trapped between components. Stand clear of moving
components while test operating the machine.
1. Use the lower controls to raise the platform approxi-
mately 3′ (1 m).
2. Turn the engine off.
3. Locate the emergency lowering knob at the left side
of the chassis (refer to Figure 7.10).
Danger
Pinch points may exist between moving components.
Death or serious injury will result from becoming
trapped between components. Make sure all person-
nel stand clear while lowering the platform with the
emergency lowering knob.
4. Make sure there is nothing in the way to obstruct the
platform when it lowers.
5. Slowly pull the emergency lowering knob outward
to open the bleed down valve. The platform should
slowly lower.
6.
Release the knob to stop the platform from lowering.
Warning
The potential for an accident increases when safety
devices do not function properly. Death or serious
injury could result from such accidents. Fully close
the emergency lowering valve before operating the
aerial platform.
7. Make certain the knob is fully released and the emer-
gency lowering valve is fully closed before operating
the aerial platform.
Emergency
Lowering Knob
Operating Controls
Use the following procedure to operate and test the ma-
chine from the lower controls:
1. At the lower controls, turn the on/off switch to the on
position and twist the emergency stop button clock-
wise.
2. Operate the preheat button if required.
y When the engine is cold, press and hold the
preheat button for approximately ve seconds
before starting the engine.
3. Press and hold the start button until the engine starts,
then release.
4. Let the engine warm to operating temperature.
Danger
Pinch points may exist between moving components.
Death or serious injury will result from becoming
trapped between components. Stand clear of moving
components while preforming prestart inspection.
Warning
The potential for an accident increases when operat-
ing an aerial platform that is damaged or malfunction-
ing. Death or serious injury could result from such
accidents. Do not operate the aerial platform if it is
damaged or malfunctioning.
5. Test the operation of the platform raise and lower
buttons in both directions.
y To raise the platform press and hold the platform
raise and the enable button.
y To lower the platform press and hold the platform
lower and the enable button.
Emergency Stop
To test the emergency stop button from the lower con-
trols:
1. Push the emergency stop button (refer to Figure 7.9)
inward to disconnect power to the lower controls and
to turn off the engine.
2. Test the lower control functions to insure they no
longer operate.
Emergency Lowering
The platform can be lowered in an emergency using the
emergency lowering knob located at the left side of the
aerial platform (refer to Figure 7.10). The emergency
lowering knob allows the platform to be lowered if there
is a malfunction in the hydraulic or electrical system. Only
use this method if the engine will not start.
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