Snorkel SB126J - Manual (Page 61)

Chapter 10 – Emergency Operation
SB126J – 0192278 55
Emergency Lowering
The main boom can be lowered in an emergency us-
ing the emergency lowering knob at the base of the lift
cylinder. Only use this method if the engine will not start
and the emergency power system will not work.
A
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.
A
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 system,
if the boom does not retract while lowering, stop
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. Make sure the boom is retracting
and lowering at the same time.
Figure 10.6 – 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.
2. Turn the knob to close the cylinder bleed down
valve.
Emergency
Lowering Knob