JLG T500J Operator Manual - Manual (Page 101)

SECTION 6 - EMERGENCY PROCEDURES
3121197 – JLG Lift – 6-3
Lift Down
1. Locate the valve stem with the black rubber boot on the
front face of the valve block. Pushing in on the boot acti-
vates the valve.
2. Locate the hand pump located on the front face of the valve
block, the handle is loose mounted to the valve mounting
plate.
3. To lift down; push in on the valve stem with the rubber boot
and hold. At the same time, using the handle, work the hand
pump until tight.
DO NOT STAND UNDER THE BOOM WHEN USING MANUAL DESCENT. THE BOOM WILL
LOWER RAPIDLY.
4. The boom will descend by itself. To stop the boom from
descending, release the button on the valve with the rubber
boot.