Snorkel TB50 - Manual (Page 41)

Chapter 7 – Prestart Inspection
TB42/TB50 – 0074923 37
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.
3. Make sure there is nothing in the way to obstruct
the platform when it lowers.
4. Slowly turn the emergency lowering knob to open
the bleed down valve (refer to Figure 7.13). The
boom should slowly lower.
Figure 7.13 – Emergency Lowering Knob
5. Turn the knob to close the cylinder bleed down
valve.
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.
6. Make certain the emergency lowering valve is fully
closed before operating the aerial platform.
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 plat-
form.
3. Start the engine and raise the main boom above
horizontal, approximately 15 to 20 degrees.
4. Open the rear door on the left side of the machine
to access the level sensor (refer to Figure 7.14).
Figure 7.14 – Level Sensor
5. Pull the level sensor to the side as far as possible
to activate the tilt alarm.
Warning
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.
6. If the alarm does not sound, remove the machine
from service until the problem is corrected.
7. Lower the main boom.
Flashing Light
The machine may be equipped with an optional flashing
light mounted on top of the cowling on each side of the
machine (refer to Figure 7.15).
Figure 7.15 – Flashing Light
To inspect the flashing lights:
1. Turn the battery disconnect on, pull the emergency
stop button outward at the lower controls, and turn
the start switch on.
2. Visually check to see that the light is flashing ap-
proximately one flash per second.
Emergency
Lowering Knob
Level Sensor
Flashing Light