JLG 510AJ Operator Manual - Manual (Page 56)

SECTION 4 - MACHINE OPERATION
4-2 – JLG Lift – 3121179
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 position 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 SUR-
FACE.
4.3 ENGINE OPERATION
NOTE: Initial starting should always be performed from the
Ground Control 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.