JLG 150HAX Operator Manual - Manual (Page 77)

SECTION 5 - EMERGENCY PROCEDURES
3121213 – JLG Lift – 5-3
To activate auxiliary power from the platform:
1. Position PLATFORM/GROUND SELECT SWITCH to
PLATFORM.
2. Position MASTER SWITCH to ON.
3. Depress and hold footswitch.
4. Operate appropriate control switch or controller for
desired function and hold.
5. Position AUXILIARY POWER switch to ON and hold.
6. Release AUXILIARY POWER switch and appropriate
control switch or controller and footswitch.
7. Position MASTER SWITCH to OFF.
To activate auxiliary power from the ground control station:
1. Position PLATFORM/GROUND SELECT SWITCH to
GROUND.
2. Position MASTER SWITCH to ON.
3. Operate appropriate control switch or controller for
desired function and hold.
4. Position AUXILIARY POWER switch to ON and hold.
5. Release AUXILIARY POWER switch and appropriate
control switch or controller.
6. Position MASTER SWITCH to OFF.
Manual Descent and Retraction
The manual descent valves are used, in the event of total
power failure, to retract the tower boom and lower the
main boom using gravity. To operate the manual descent
system, proceed as follows:
1. Remove manual descent pump handle from inside bat-
tery access door.
2. Open manual descent valves # 1 and # 2 by turning
valve handles counterclockwise and close manual
descent valve # 3 by turning valve handle clockwise.
3. Pump hydraulic hand pump until tight, or until Tower
Telescope In and Main Lift Down begin retracting. To
stop functions, open valve # 3.
4. Tower Telescope In and Main Lift Down can be operated
independent of each other. To operate Tower Telescope
In open valve # 1. To operate Main Lift Down open valve
# 2.
5. When manual descent function has been completed,
open all valves 1 full turn, then return pump handle to
stowed position.