JLG X550AJ Operator Manual - Manual (Page 46)

SECTION 4 - MACHINE OPERATION
4-2 – JLG Lift – 3128791
4.3 ENGINE OPERATION
NOTE: Initial starting must always be performed from the
ground controls.
The gas/diesel engine key switch on the engine must be
switched to ON, the battery disconnect switch must be ON
(see Section 4.10 on page 4-22) and power/emergency stop
buttons at the platform and ground controls must be ON
(turned clockwise) to start the engine.
Gas/Diesel Starting Procedure
NOTE: If gas/diesel 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 minutes. If
engine fails after several attempts, refer to manufac-
turers engine maintenance manual.
NOTE: If engine is diesel, when starting from ground, turn the
start key at the engine to the HEAT (glow plug) posi-
tion for 10 to 15 seconds before attempting to start.
Release the key and start the engine.
1. Set the key at the Ground/Emergency Control box in
the neutral (vertical) position, then push the appro-
priate ENGINE START switch until engine starts.
NOTE: Allow gas/diesel engine to warm-up for a few minutes
at low speed before applying any load.
Figure 4-1. Ground/Emergency Control Box
1. Platform/Remote (Center)
Platform Position
2. Ground Control Position -
(Turn ClockWise and Hold)
3. Platform/Remote Ground
Maintenance Position -
(Turned CounterClockWise)
4. Gas/Diesel Engine Start
Button (1) (if equipped)
5. Electric Engine Start Button (1)
6. Enable Light
NOTE: (1) Switch at engine must be set to ON, battery disconnect
switch must be ON, and both the ground and platform emer-
gency stop switches must be set to ON.