JLG 150HAX Operator Manual User Manual
Page 45
SECTION 3 - MACHINE CONTROLS AND INDICATORS
3121213
– JLG Lift –
3-9
10. Tower Lift Controller
The TOWER LIFT controller provides raising and lower-
ing of the tower boom when positioned to UP or DOWN.
11. Main Lift Controller
The MAIN LIFT controller provides raising and lowering
of the main boom when positioned to UP or DOWN.
12. Manual Descent Valves (Not Shown)
The manual descent valves are located on the left front
of the machine turntable. The manual descent valves
should be used, in the event of a total power failure, to
lower the work platform in the event of an emergency.
The valves permit the use of gravity to retract the tower
boom and lower the main boom. Refer to Section 6 for a
complete description of the manual descent systems,
their application and their operation.
13. Function Enable
If equipped, the enable switch must be held "DOWN" to
enable all boom controls when the engine is running.
14. Platform Overload (If equipped)
Indicates the platform has been overloaded.