SECTION 3 - MACHINE CONTROLS, INDICATORS, AND MACHINE OPERATION
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3.10 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.
When operating a machine at high ambient temperatures, a
decrease in machine performance and an increase in engine
coolant temperature may occur.
Contact JLG Customer Service for operation under abnormal
conditions.
Starting Procedure
NOTE: Perform initial start-up from Ground Controls.
1. Check engine oil before attempting to start engine; if neces-
sary, add oil (refer to Section 6.4 for details).
2. Pull out the red emergency stop switch (ON).
3. Position the platform/ground select switch to the desired
operating control station (platform or ground).
4. If operating a dual fuel machine, press the dual fuel select
switch on the platform control station to the desired posi-
tion.
NOTE: If LPG system is selected, ensure the hand valve on LPG supply
tank is opened prior to attempting to start engine.
IF ENGINE FAILS TO START PROMPTLY, DO NOT CRANK FOR AN EXTENDED PERIOD; DO
NOT RUN STARTER MOTOR FOR MORE THAN 20 SECONDS. SHOULD ENGINE FAIL TO
START ONCE AGAIN, ALLOW STARTER TO “COOL OFF” FOR 2 TO 3 MINUTES. IF ENGINE
FAILS TO START AFTER SEVERAL ATTEMPTS, REFER TO ENGINE MANUAL.
5. To start machine:
• At Ground Controls: Position emergency stop switch to
on, press engine start switch, and hold until engine starts.
• At Platform Controls: Position ground and platform
emergency stop switches to on, press engine start switch,
and hold until the engine starts.
When diesel engine-powered machines are turned on, the glow plug indi-
cator will illuminate on the platform and ground control indicator displays,
regardless of engine or ambient temperature. Do not start the engine until
the glow plug indicator light disappears.
ALLOW ENGINE TO WARM UP BEFORE APPLYING ANY LOAD.
6. After engine has warmed, proceed with operation.
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