Emergency Lowering System - Skyjack SJ-600 Series Operating Manual

Emergency Lowering System

(600 & 800 Series)
1
Figure 2-14. Emergency Lowering System
Emergency Lowering System - This system allows
platform lowering in the event of an emergency or an
electrical system failure.
1. Holding Valve Manual Override Knob - Located
on the holding valve at the bottom of each lift cylinder,
these red knurled knobs when depressed and turned
counter-clockwise allow hydraulic oil to bypass each
holding valve. The red knurled knobs on each
holding valve MUST
clockwise to restore normal operation. An access
rod for reaching the elevated manual override
knob shall be provided for CE units only.
2. Emergency Lowering Valve - Pull out and hold
the Emergency Lowering Valve plunger, and the
platform will gradually lower. Located at the rear of
the hydraulic/electric side cabinet, this pull-type valve
when used in conjunction with the holding valve
manual overrides, allows platform lowering in the
event of an emergency or electrical system failure.
Activate all holding valve manual override knobs,
then pull and hold the plunger out to lower platform.
Release to stop.
Crushing Hazard
Keep clear of scissors mechanism when using
emergency lowering valve!
lowering is completed, the red knurled knobs on
each holding valve
MUST
clockwise to restore normal operation.
SJ 600, 800 & 1000 Series
122883AH
2
be depressed and turned
Warning
After emergency
be depressed and turned
Emergency Lowering System
(1000 Series only)
1
Figure 2-15. Emergency Lowering System
Emergency Lowering System - Located on the
hydraulic tank and accessed through a hole in the
hydraulic/electric cabinet door, this system allows
platform lowering in the event of an emergency or an
electrical system failure. An auxiliary battery provides
power for the push-button switch to activate a
lowering valve on the base of each lift cylinder.
Emergency Lowering Push-Button Switch (1) and
Emergency Lowering Valve (2) - To lower the
platform, depress and hold this red push-button
switch, then pull the valve plunger out. The platform
will gradually lower. Release the valve plunger to stop.
May 2002
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SECTION 2, Page 23