JLG G6-42A Operator Manual - Manual (Page 24)

Starting the Engine
1. Make sure all controls are in “Neutral” and all electrical components (lights,
heater, defroster, etc.) are turned off. Set parking brake.
2. Depress accelerator pedal approximately 1/4 to 1/3 of travel from top.
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 a few minutes before trying
again.
4. After engine starts, observe oil pressure gauge. If gauge remains on zero
for more than ten seconds, stop engine and determine cause. Correct
malfunction before restarting engine. Minimum pressure at operating
temperature:
Low idle: 10 PSI (69kPa)
5. Warm up engine at approximately 1/2 throttle until engine coolant
temperature reaches operating range.
Cold-Weather Starting Aids
In cold weather situations, a supplemental starting aid may be required.
Gradall-approved starting aids employ ether. If your handler is equipped
with an ether starting aid, the following applies:
• All employed ether is triggered by temperature gauge located on engine.
• At start-up, temperature gauge on engine will detect if ether is needed. Follow
normal start-up procedure, shown above.
• Ether is employed and additional will be released if needed, to keep engine
running.
• A second battery is added for additional cold-cranking capacity.
Battery-Boosted Starting
If you ever have to battery-boost start (jump-start) your handler, proceed as
follows:
• Never allow vehicles to touch
• Connect the positive (+) jumper cable to positive (+) post of discharged
battery
• Connect opposite end of positive (+) jumper cable to positive (+) post of
booster battery
• Connect the negative (-) jumper cable to negative (-) post on booster battery
• Connect opposite end of negative (-) jumper cable to ground point on machine
away from discharged battery
• Follow standard starting procedures
• Remove cables in reverse order after machine has started
ENGINE OPERATION
6.0
NOTE!
Engine will not start unless
transmission control lever is in
“Neutral” and parking brake
switch is applied.
WARNING !
Operator must be seated with seat
belt fastened, transmission control
lever in “Neutral” position, parking
brake applied and all hydraulic
controls in “Neutral” before
starting engine.
Turning ignition switch to “START”
position while engine flywheel is
rotating may cause serious damage
to engine and/or starting motor.
CAUTION !
CAUTION !
If your machine is equipped with
a cold start aid, do not spray
additional ether into air cleaner.
If machine is not equipped with
cold start aid, follow instructions
listed in the engine manual
supplied with machine.