JLG 600A_AJ Operator Manual - Manual (Page 75)

SECTION 4 - MACHINE OPERATION
3121204 – JLG Lift – 4-19
4.14 DUAL FUEL SYSTEM (GAS ENGINE ONLY)
The dual fuel system enables the standard gasoline engine
to run on either gasoline or LP gas.
IT IS POSSIBLE TO SWITCH FROM ONE FUEL SOURCE TO THE OTHER
WITHOUT ALLOWING THE ENGINE TO STOP. EXTREME CARE MUST BE
TAKEN AND THE FOLLOWING INSTRUCTIONS MUST BE FOLLOWED.
Changing From Gasoline to LP Gas
1. Start engine from Ground Control Station.
2. Open hand valve on LP gas supply tank by turning
counterclockwise.
3. While engine is operating on GASOLINE under a no-
load condition, place FUEL SELECT switch at Platform
Control to LP position.
Changing From LP Gas to Gasoline
1. With engine operating on LP under a no-load condition,
position FUEL SELECT switch at Platform Control Sta-
tion to GASOLINE position.
2. Close hand valve on LP gas supply tank by turning
clockwise.
4.15 RE-SYNCHRONIZE THE LOWER LIFT
CYLINDER
Level Override Valve
A pull type control valve allows the operator to adjust the
tower lift cylinder and the upright cylinder if the upright cylin-
der is not fully retracted when boom is in the stowed posi-
tion. This valve is located in the engine compartment area.
To Operate:
1. Pull the red knob
2. Using the ground control raise the lower boom 6 feet.
3. Release the knob.
4. Fully lower the boom.
5. Repeat if necessary.