JLG 450AJ Operator Manual - Manual (Page 25)

SECTION 2 - PREPARATION AND INSPECTION
3120868 – JLG Lift – 2-9
2.5 DAILY FUNCTIONAL CHECK
A functional check of all systems must be performed,
once the walk-around inspection is complete, in an area
free of overhead and ground level obstructions. First,
using the ground controls, check all functions controlled
by the ground controls. Next, using the platform controls,
check all functions controlled by the platform controls.
TO AVOID SERIOUS INJURY, DO NOT OPERATE MACHINE IF ANY
CONTROL LEVERS OR TOGGLE SWITCHES CONTROLLING
PLATFORM MOVEMENTS DO NOT RETURN TO THE OFF OR NEU-
TRAL POSITION WHEN RELEASED.
TO AVOID A COLLISION AND INJURY IF PLATFORM DOES NOT
STOP WHEN A CONTROL SWITCH OR LEVER IS RELEASED,
REMOVE FOOT FROM FOOTSWITCH OR USE EMERGENCY STOP
TO STOP THE MACHINE.
NOTE: When the boom is raised above horizontal, high
drive speed is cut out.
1. Check boom horizontal limit switches to see that
they are operable and not damaged. Raise and
lower Lower Boom. Check for smooth operation.
Check Boom Upright tilting for proper synchroniza-
tion. If the upright is tilted or the boom will not fully
lower, refer to the Boom Synchronizing Procedure in
Section 3.
NOTE: Perform checks from ground controls first, then from
platform controls.
2. Raise, extend, retract and lower Upper Boom.
Check for smooth operation.
3. Telescope boom IN and OUT several cycles at vari-
ous degrees of elevation lengths. Check for smooth
telescope operation.
4. Swing turntable to LEFT and RIGHT a minimum of
45 degrees. Check for smooth motion.
5. With the aid of an assistant to monitor the CHASSIS
OUT OF LEVEL indicator light on the platform con-
sole, manually activate the indicator light by com-
pressing one of the three tilt indicator mounting
springs. If the light does not illuminate, shut down
machine and contact a qualified service technician
before continuing operation.
6. Check that platform self-leveling system functions
properly during raising and lowering of boom.
7. Check rotator for smooth operation and assure plat-
form will rotate 75 degrees in both directions from
centerline of boom.
8. Drive forward and reverse; check for proper opera-
tion.
9. Steer left and right; check for proper operation.
10. Footswitch.
FOOTSWITCH MUST BE ADJUSTED SO THAT FUNCTIONS WILL
OPERATE WHEN PEDAL IS APPROXIMATELY AT ITS CENTER OF
TRAVEL. IF SWITCH OPERATES WITHIN LAST 1/4" OF TRAVEL,
TOP OR BOTTOM, IT SHOULD BE ADJUSTED.
a. Activate hydraulic system, by depressing foot-
switch. Operate Telescope and hold control.
Remove foot from footswitch, motion should
stop. If it does not, shut down machine and con-
tact a certified JLG service technician.
b. With footswitch depressed, operate Lift and hold
control. Remove foot from footswitch, motion
should stop. If it does not, shut down machine
and contact a certified JLG service technician.
c. With engine power shut down, depress the foot-
switch. Attempt to start engine. Engine should
n o t a t t e m p t t o s t a r t w h e n f o o t s w i t c h i s
depressed. If starter engages or engine turns
over, shut down machine and contact a certified
JLG service technician.
11. Auxiliary Power.
Operate each function control switch (e.g. Tele, Lift,
and Swing) to assure that they function in both
directions using auxiliary power instead of engine
power.
12. Ground Controls.
Place Ground/Platform Select switch to Ground.
Start engine. Platform controls should not operate.