JLG 1230ES Operator Manual - Manual (Page 34)

SECTION 3 - MACHINE CONTROLS AND INDICATORS
3-6 – JLG Lift – 3121221
Platform Manual Descent Valve
The platform manual descent valve is used in the event of total
power failure to retract and lower the platform using gravity.
The manual descent valve is located at the bottom of the mast
assembly on the front of the machine inside an access hole.
Look for the instruction decal located just above the access
hole.
The procedure is as follows:
1. Locate the manual descent valve (1) on the front of
the machine at the base of the mast.
KEEP HANDS AND ARMS OUT OF THE PATH OF THE MAST AND PLATFORM
WHILE LOWERING.
2. Press and hold the RED button on the manual descent
valve, release the button when the platform is lowered
to desired level.
Figure 3-5. Location of Manual Descent Valve
(Front of Machine)