DC Electric Full-size RTs
December 2007 Page 47
Section 2 - Operation Emergency Lowering Procedure
2.13 Emergency Lowering Procedure
This section guides the operator on how to use the
emergency lowering system. This system allows
platform lowering in the event of an emergency or an
electrical system failure.
WARNING
Keep clear of scissors mechanism when
using emergency lowering valve.
1. Remove any obstructions from a descending
platform.
2. Extension platform(s) may need to be retracted
or aerial platform may need to be moved to clear
the obstruction. Refer to Section 2.13 for winching
and towing procedures.
1
3
2
Figure 2-20. Emergency Lowering System
3. Lo c a t e h o ld i ng v a lv e o ve r ri d e k n o b s
(item 1) at base of each lift cylinder. Depress
and turn counterclockwise. If necessary, use
emergency lowering access rod (item 3) that is
located on aerial platform base.
4. On the hydraulic compartment, pull out and
hold emergency lowering valve (item 2) to lower
platform.
5. To restore normal operation, depress and turn
holding valve override knobs clockwise.
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