SKYJACK, Page 56
February 2008
Mid Size & Full Size RT’s
Engine Powered
Section 2 - Operation
Emergency Lowering Procedures
2.15 Emergency Lowering Procedures
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
engine malfunction.
Models 71xx, 8831 & 8841
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
and towing procedures.
3
1
2
Figure 2-26. Emergency Lowering System
3.
L o c a t e h o l d i n g v a l v e o v e r r i 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.
Models 8243, 8850 & 9250
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
for winc
hing
and towing procedures.
2
1
Figure 2-27. Emergency Lowering System
3.
On hydraulic compartment, depress and hold
emergency lowering pushbutton (item 1) to
activate the auxiliary lowering valves. Pull out and
hold the emergency lowering valve (item 2) to
lower platform. No further actions are required to
restore normal operation.
