SKYJACK, Page 36
February 2008
Mid Size & Full Size RT’s
Engine Powered
Section 2 - Operation
Function Tests
Model 71xx Hydraulic/Electrical Compartment
Emergency Main
Power Disconnect
Switch
Battery
Electrical Panel
Base Control
Switches
Emergency
Lowering Valve
Test Platform Raise/Lower Pushbutton
•
1. On the base control console at the
hydraulic/electrical compartment, push
in platform raise pushbutton to “ ” raise
the platform or platform lower pushbutton
to “
” lower the platform.
Result: Platform raising and lowering
functions should operate.
Test Emergency Lowering
•
(Models 71xx & 8xxx)
1. Raise the platform.
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 lower.
4. To restore normal operation, depress and
turn holding valve manual override knobs
clockwise.
Test Emergency Lowering
•
(Model 9250)
1. Raise the platform.
2. On hydraulic/electrical 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.
Result: The platform should lower.
