JLG 450AJ ANSI Operator Manual - Manual (Page 50)

SECTION 4 - MACHINE OPERATION
4-2 – JLG Lift – 3120748
4.3 ENGINE OPERATION
NOTE: Initial starting should always be performed from the
Ground Control station.
Starting Procedure
1. Check engine oil. If necessary, add oil in accor-
dance with the Engine Manufacturer’s manual.
2. Check fuel level. Add fuel if necessary.
3. Check that air cleaner components are in place and
securely fastened.
IF ENGINE FAILS TO START PROMPTLY, DO NOT CRANK FOR AN
EXTENDED PERIOD. SHOULD ENGINE FAIL TO START ONCE
AGAIN, ALLOW STARTER TO "COOL OFF" FOR 2-3 MINUTES. IF
ENGINE FAILS AFTER SEVERAL ATTEMPTS, REFER TO ENGINE
MAINTENANCE MANUAL.
NOTE: Machines with diesel engines. After turning on igni-
tion, operator must wait until glow plug indicator light
goes out before cranking engine.
4. Turn key of SELECT switch to GROUND. Position
POWER/EMERGENCY STOP switch to ON, then
push the ENGINE START switch to the upward posi-
tion until engine starts.
ALLOW ENGINE TO WARM-UP FOR A FEW MINUTES AT LOW
SPEED BEFORE APPLYING ANY LOAD.
5. After engine has had sufficient time to warm up, shut
engine off.
6. Turn key of SELECT switch to PLATFORM.
7. From Platform position POWER/EMERGENCY
STOP switch to ON, then push the ENGINE START
switch to the forward position until engine starts.
NOTE: Footswitch must be in released (up) position before
starter will operate. If starter operates with footswitch
in the depressed position, DO NOT OPERATE
MACHINE.
Shutdown Procedure
IF AN ENGINE MALFUNCTION NECESSITATES UNSCHEDULED
SHUTDOWN, DETERMINE AND CORRECT CAUSE BEFORE
RESUMING ANY OPERATION.
1. Remove all load and allow engine to operate at low
speed setting for 3-5 minutes; this allows for further
reduction of internal engine temperature.
2. Position POWER/EMERGENCY STOP switch to OFF.
3. Turn key of MASTER switch to OFF position.
NOTE: Refer to Engine Manufacturer’s manual for detailed
information.
4.4 TRAVELING (DRIVING)
DO NOT DRIVE WITH BOOM EXTENDED OR ABOVE HORIZONTAL
EXCEPT ON A SMOOTH, FIRM AND LEVEL SURFACE.
TO AVOID LOSS OF TRAVEL CONTROL OR UPSET ON GRADES
AND SIDESLOPES, DO NOT DRIVE MACHINE ON GRADES OR
SIDESLOPES EXCEEDING THOSE SPECIFIED ON MACHINE
INFORMATION PLACARD ON THE LEFT SIDE OF THE FRAME.
TRAVEL GRADES WITH DRIVE SPEED/TORQUE SELECT SWITCH
IN THE FORWARD POSITION. USE EXTREME CAUTION WHEN
DRIVING IN REVERSE AND AT ALL TIMES WHEN DRIVING WITH
PLATFORM ELEVATED AND ESPECIALLY WHEN DRIVING WITH
ANY PART OF MACHINE WITHIN 6 FEET (2 M) OF AN OBSTRUC-
TION. DO NOT USE DRIVE TO MANEUVER PLATFORM CLOSE TO
AN OBSTRUCTION...USE ONE OF THE BOOM FUNCTIONS.
BEFORE DRIVING, MAKE SURE BOOM IS POSITIONED OVER
REAR AXLE. IF BOOM IS OVER FRONT AXLE (STEER WHEELS),
STEER AND DRIVE CONTROLS WILL MOVE IN OPPOSITE DIREC-
TIONS TO MACHINE CONTROLS.
Traveling Forward or Reverse
1. With engine running, depress footswitch and posi-
tion DRIVE control to FORWARD and hold for the
duration of forward travel desired.
NOTE: When DRIVE or STEER functions are being oper-
ated there is an interlock which prevents operation of
boom functions.
2. Depress footswitch and position DRIVE control to
REVERSE and hold for duration of reverse travel
desired.
3. Depress footswitch and position STEER control to
RIGHT for traveling right and LEFT for traveling left.