Snorkel SB126J - Manual (Page 37)

Chapter 7 – Prestart Inspection
SB126J – 0192278 31
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
lowering system.
1. Use the lower controls to raise the main boom to ap-
proximately 30 degrees and extend approximately
1 m (3 ′).
2. Turn the engine off.
A
Danger
Pinch points may exist between moving compo-
nents. Death or serious injury can result from
becoming trapped between components. Stand
clear of moving components while test operating
the machine.
3. Accessing the knob from below the turntable only,
slowly turn the knob (refer to Figure 7.16) to open the
bleed down valve. The boom should slowly lower and
retract by gravity, until boom is almost fully retracted,
then it should lower only. If the boom is extended
more than a few feet and fails to retract when lower-
ing, remove the machine from service and contact
an UpRight authorized service provider.
Figure 7.16 – Emergency Lowering Knob
A
Warning
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, fl at, level
surface.
2. Remove all persons and materials from the plat-
form.
3. Start the engine and raise the main boom 10 to 20
degrees above horizontal.
4. Open the rear door on the left side of the machine
to access 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.
A 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
If the machine is equipped with an optional fl ashing light,
visually check to see that it fl ashes. The light should
fl ash when the engine is running.
Sandblast Protection Kit
The optional sandblast protection kit protects the cyl-
inders 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.
Emergency
Lowering Knob
Level Sensor