Snorkel TB125J - Manual (Page 35)

Chapter 7 – Prestart Inspection
T125J/TB125J – 0192214 35
Figure 7.16 – Hose Carrier and Main Boom
3. Fully raise the boom.
4. Check the lower controls for a flashing green light
and check the EMS display, located on the front of
the junction box, for any error messages. Fully lower
and retract the boom. In the event of a flashing green
light or EMS error messages, remove the machine
from service and contact a Snorkel authorized ser-
vice provider.
5. From the upper controls operate the Lift/Lower and
Extend/Retract switches without depressing the foot
switch. The boom should not move and the EMS will
error out in 10-15 seconds. If the boom moves or the
EMS does not error out, remove the machine from
service and contact a Snorkel authorized service
provider.
6. From the lower controls, extend the boom approxi-
mately 2 m (6′) and raise the boom to a 30 degree
angle.
7. Open the manual bleed down valve. The EMS will
error out for primary and backup length and angle
sensors. If the EMS does not error out, remove the
machine from service and contact a Snorkel autho-
rized service provider.
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
3′ (1 m).
2. Turn the engine off.
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 know from below the turntable only,
slowly turn the knob (refer to Figure 7.17) 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.
Figure 7.17 – Emergency Lowering Knob
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, flat, level
surface.
2. Remove all persons and materials from the plat-
form.
3. Start the engine and raise the main boom 10 ° to 20 °
above horizontal.
4. Open the rear door on the left side of the machine
to access the level sensor (refer to Figure 7.18).
Emergency
Lowering Knob