JLG 4017 Operator Manual - Manual (Page 88)

Section 5 - Emergency Procedures
5-2 3121857
5.2 EMERGENCY LOWERING OF BOOM
Valve Layout
Cylinder/Function A B
Lift Cylinder: Raise Lower
Extend/Retract Cylinder: Extend Retract
Tilt Cylinder: Up Down
Auxiliary Hydraulics
Sway Cylinder:
Left Right
Right Outrigger: Down Up
Left Outrigger: Down Up
Electronic Control Unit Failure
If the telehandler’s electronic control unit fails, the boom can be retracted then
lowered manually. With the engine running perform the following:
1. Shift transmission control lever to neutral, apply parking brake and block
wheels.
2. Open the hood.
3. Screw the handle (1) (located in cab toolbox) into the appropriate valve unit (2).
4. Carefully actuate the valve lever.
WARNING
TIP OVER HAZARD. To be used for retracting then lowering load only.
Extending/lifting load could damage the equipment and/or cause tip over
resulting in death or serious injury.
OZ0420
1
2
EX
T/
RET
LIFT
TI
LT AU
X
SWA
Y L.
O
/R
R.
O
/R
A
B
FRONT
OF
MA
CHINE