Boom Operating Characteristics And Limitations; Capacities; Stability; Engine Operation - JLG 340AJ Operation And Safety Manual

SECTION 4 - MACHINE OPERATION
4.2 BOOM OPERATING CHARACTERISTICS AND
LIMITATIONS

Capacities

Raising boom above horizontal with or without any load in plat-
form, is based on the following criteria:
1. Machine is positioned on a smooth, firm and level surface.
2. Load is within manufacturers rated design capacity.
3. All machine systems are functioning properly.
4. Machine is as originally equipped from JLG.

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 Figure 4-1., and its position
of least BACKWARD stability is shown in Figure 4-2.
TO AVOID FORWARD OR BACKWARD TIPPING, DO NOT OVERLOAD MACHINE OR OPER-
ATE THE MACHINE ON AN OUT-OF-LEVEL SURFACE.
4-2
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 MIN-
UTES. 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.
– JLG Lift – 3121258