Skyjack SJ9250 RT - Test Emergency Lowering; Test Main Power Disconnect Switch

Page 34 December 2007
Rough Terrain Scissors
Function Tests Section 2 - Familiarization
It is the responsibility of the operator to read, completely understand and follow all instructions and warnings
contained in this operating manual and on the aerial platform.
• Test Emergency Lowering (Models 71xx
& 88xx)
WARNING
Be aware of overhead obstructions or
other possible hazards around the aerial
platform when lifting.
1. Raise the platform to an approximate
height of 13 ft. (4 m).
2. Locate holding valve manual override
knob at the base of each lift cylinder.
Depress and turn counterclockwise.
If necessary, use emergency lowering
access rod that is located on the base of
the aerial platform.
3. On hydraulic/electrical compartment, pull
out and hold emergency lowering valve to
fully lower the platform.
Result: The platform should fully lower.
4. To restore normal operation, depress and
turn holding valve manual override knobs
clockwise.
• Test Emergency Lowering (Model
9250)
WARNING
Be aware of overhead obstructions or
other possible hazards around the aerial
platform when lifting.
1. Raise the platform to an approximate
height of 13 ft. (4 m).
2. In hydraulic/electrical compartment,
depress and hold emergency lowering
pushbutton to activate the auxiliary
lowering valves. Pull out and hold the
emergency lowering valve to fully lower
platform.
Result: The platform should fully lower.
• Test Main Power Disconnect Switch
1. On hydraulic/electrical compartment, turn
main power disconnect switch to “
” off
position.
Result: Engine should shut down and
aerial platform functions should not
operate.
Base Control Console
Emergency Lowering
Valve
Platform Lower/Neutral/
Raise Switch
Enable Switch
Base Control Console
Emergency Stop
Button
FAMILIARIZATIONFAMILIARIZATION