JLG G12-55A Operator Manual - Manual (Page 61)

Section 4 - Operation
4-1 31200745
SECTION 4 - OPERATION
4.1 ENGINE
Starting the Engine
This machine can be operated under normal conditions in temperatures of 0°F to
104°F (-20°C to 40°C). Consult JLG for operation outside this range or under
abnormal conditions.
If equipped for extreme cold weather, -40°F to 0°F (-40°C to -20°C), see page 4-2
for starting procedure.
1. Make sure all controls are in “Neutral” and all electrical components (lights,
heater, defroster, etc.) are turned off. Apply parking brake.
2. Turn the ignition switch to “RUN” position and wait until engine pre-heat
indicator goes out.
3. Turn ignition switch to “START” to engage starting motor. Release key
immediately when engine starts. If engine fails to start within 20 seconds,
release key and allow starting motor to cool for two minutes before trying again.
Note: (If equipped for ULS) Engine is equipped with starter lockout feature and may
prevent starter engagement under certain conditions. Fault code will appear on
gauge display. Return ignition switch to “RUN” position for a minimum of two
minutes to allow system to reset before trying to start again.
4. After engine starts, observe oil pressure gauge. If gauge remains on zero for
more than ten seconds, stop engine and determine cause before restarting
engine.
5. Warm up engine at approximately 1/2 throttle.
Note: Engine will not start unless transmission control lever is in “Neutral” and park
brake switch is applied.
WARNING
ENGINE EXPLOSION. Do not use ether for cold weather starting.
WARNING
UNEXPECTED MOVEMENT HAZARD. Always ensure that transmission control
lever is in neutral and the service brake is applied before releasing park brake.
Releasing park brake in either forward or reverse could cause the machine to
move abruptly.