JLG X550AJ Operator Manual - Manual (Page 87)

SECTION 5 - EMERGENCY PROCEDURES
3128791 – JLG Lift – 5-7
Manual Descent without Engine and Electrical
Power
Using Hand Pump in Hydraulic Compartment on Right
side of Machine
1. Platform retrieval sequence.
Ensure the machine is level and all outriggers are prop-
erly deployed on a firm surface.
a. Remove the cover from the electrical components
tray on the left side of the machine.
b. Locate and remove the proportional valve adjust-
ment knob from the protective plastic bag,
c. Slide the adjustment knob assembly onto the pro-
portional valve stem (item 1 - Figure 5-3.) located
next to the electric engine.
d. Open the flow valve by turning the thumbwheel in
the clockwise direction until it stops.
e. Locate the pump handle secured to the side of the
boom assembly directly behind the hand pump.
f. Install the pump handle on the pump (item 1 - Figure
5-4.) and secure in place with the provided screw.
The lever (item 2 - Figure 5-4.) on the pump must be
set to the left.
NEVER WORK UNDER AN ELEVATED PLATFORM UNTIL PLATFORM
HAS BEEN SAFELY RESTRAINED FROM ANY MOVEMENT BY
BLOCKING OR OVERHEAD SLING.
NEVER REACH THROUGH, UNDER, OR OVER THE BOOM' S PATH
OF TRAVEL TO THE GROUND CONTROL PANEL. IF NO ASSISTANT
IS AVAILABLE, PROCEED WITH THE FOLLOWING STEPS.
Figure 5-4. Hand Pump - On Top Of Hydraulic Tank
1
2