Snorkel TB125J - Manual (Page 61)

Chapter 10 – Emergency Operation
T125J/TB125J – 0192214 61
Manual Emergency Bleed Down System
The main boom can be lowered in an emergency using
the emergency lowering knob. Use this method if the
engine will not start and the emergency power system
will not work.
Danger
Pinch points exist between boom components and
between the booms and turntable. Death or serious
injury can result if the booms or platform lowers
onto personnel. Make sure all personnel stand clear
while lowering the booms.
The emergency lowering knob is located at the base
end of the main boom lift cylinder, under the center of
the turntable. It is accessible from the underside of the
turntable.
Use the following procedure to manually lower the main
boom.
Danger
The aerial platform can tip over if it becomes un-
stable. Death or serious injury can result from a tip-
over accident. When using the bleed down systems
the boom must retract and lower at the same time.
If the boom does not retract while lowering, cease
operations immediately.
1. Slowly turn the knob (refer to Figure 10.6) to open
the bleed down valve. Control the rate of descent
by turning the knob.
Figure 10.6 – 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.
2. Turn the knob to close the cylinder bleed down
valve.
Towing
The aerial platform may be towed at slow speeds using
the optional tow kit. The tow vehicle must have sufficient
capacity to safely tow and stop itself and the aerial
platform on the steepest grade and type of surface that
may be encountered. Refer to Chapter 2 for the gross
vehicle weight of the aerial platform.
Warning
The aerial platform is free to move when the drive
hubs are disabled. Death or serious injury can result.
Securely fasten the tow vehicle to the aerial platform
before disabling the drive hubs.
Use the following procedure to manually disengage the
drive hubs and tow the machine.
1. With the machine in the stowed position, remove
the tow bar from the storage cradles at the rear of
the chassis and lay the tow bar near the front of the
chassis.
Danger
Pinch points may exist between machine compo-
nents. Death or serious injury can result from be-
coming trapped between components. Do not attach
the tow bar to the tow vehicle until the counterweight
is to the side of the chassis.
2. Rotate the turntable, until the counterweight is to
the side of the chassis, to allow room to attach the
tow bar.
3. Attach the tow bar (refer to Figure 10.7) to the tow
lug with the tow pin and snap pin.
Figure 10.7 – Tow Bar Connection
4. Attach the tie rod to the tow bar and the right hand
steering yoke.
Tie Rod
Tow Bar
Tow Pin
Tow Lug
Snap Pin
Emergency
Lowering Knob