JLG 450A_AJ Series II Operator Manual - Manual (Page 56)

SECTION 4 - MACHINE OPERATION
4-2 – JLG Lift – 3121289
Stability
Machine stability is based on two (2) conditions which are called
FORWARD and BACKWARD stability. The machine’s position of
least FORWARD stability is shown in (See Figure 4-1.), and its posi-
tion of least BACKWARD stability is shown in (See Figure 4-2.)
TO AVOID FORWARD OR BACKWARD TIPPING, DO NOT OVERLOAD MACHINE OR OPERATE
THE MACHINE ON AN OUT-OF-LEVEL SURFACE.
4.3 ENGINE OPERATION
NOTE: Initial starting must always be performed from the Ground Con-
trol station.
Starting Procedure
IF ENGINE FAILS TO START PROMPTLY, DO NOT CRANK FOR AN EXTENDED TIME. SHOULD
ENGINE FAIL TO START AGAIN, ALLOW STARTER TO “COOL OFF” FOR 2-3 MINUTES. IF
ENGINE FAILS AFTER SEVERAL ATTEMPTS, REFER TO ENGINE MAINTENANCE MANUAL.
NOTE: Diesel engines only: After turning on ignition, operator must
wait until glow plug indicator light goes out before cranking
engine.
1. Turn key of SELECT switch to GROUND. Position POWER/
EMERGENCY STOP switch to ON, then push the ENGINE
START switch until engine starts.
ALLOW ENGINE TO WARM-UP FOR A FEW MINUTES AT LOW SPEED BEFORE APPLYING ANY
LOAD.