Snorkel TB37 2001 - Manual (Page 30)

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 main boom lift cylinder.
Use the following procedure to test the emergency low-
ering system.
1. Use the lower controls to raise the main boom
boom until the emergency lower knob is visible in
the access hole as shown in Figure 7.15.
Figure 7.15—Emergency Lowering Knob
2. Turn the engine off.
Pinch points may exist between moving compo-
nents. Death or serious injury can result from be-
coming trapped between components. Stand clear
of moving components while test operating the ma-
chine.
3. Slowly turn the knob to open the bleed down valve.
The boom should slowly lower by gravity.
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 plat-
form.
3. Start the engine and raise the main boom about 8
′
(2.4 m) so the boom switch arm on the right side of
the turntable no longer contacts the boom (refer to
Figure 7.16).
Figure 7.16—Boom Switch
4. Open the door on the left side of the turntable to ac-
cess the level sensor (refer to Figure 7.17).
Figure 7.17—Level Sensor
5. 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.
6. If the alarm does not sound, remove the machine
from service until the problem is corrected.
7. Lower the main boom.
Flashing Light
If the machine is equipped with an optional flashing
light, visually check to see that it flashes. The light
should flash when the engine is running.
Sandblast Protection Kit
The optional sandblast protection kit protects the cylin-
ders 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.
page 7 - 6 TB37 – 0172094
Chapter 7. Prestart Inspection
Main Boom
Switch Arm
Level Sensor
DANGER
DANGER
DANGER
Emergency
Lowering Knob