JLG H340AJ, Operation And Safety Manual

Page: 60 / 144

SECTION 4 - MACHINE OPERATION
4-2 3121633
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.
4.3 ENGINE OPERATION
NOTE: When operating a machine at high altitudes, a decrease in
machine performance may occur due to a decrease in air den-
sity.
NOTE: When operating a machine at high ambient temperatures, a
decrease in machine performance and an increase in engine
coolant temperature may occur.
NOTE: Contact JLG Customer Service for operation under abnormal
conditions.
There are three engine starting modes: Auto Start, Operator Start,
and Jump Start. In the Auto Start mode, an audible warning will
sound before the GenSet will start the engine. The other two
modes require the operator to engage the Start switch to begin
the engine start sequence.
NOTE: The engine is started by the genset, not the engine starter. The
engine starter only functions for Jump Start operation.