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3 — OPERATION
Manual Lowering
Each Manual Lowering Valve (Figure 3-6) is
equipped with a plunger, found at the base of the lift
cylinders and on the back side of the jib boom
(Figure 3-7). Use the plungers to lower the platform
in case of a complete electrical power failure, a load
shift, or other emergency situation. To lower the
work platform, push the valve plungers. Continue
pushing the plungers to completely lower the booms.
Figure 3-6. Manual Lowering Valve (Jib)
3522A
UPPER BOOM
(END OF CYLINDER)
LOWER BOOM
(END OF CYLINDER)
JIB BOOM
(BEHIND BOOM)
Figure 3-7. Manual Lowering Valve Locations
21