JLG 601S Service Manual - Manual (Page 109)

SECTION 3 - CHASSIS & TURNTABLE
3120866 – JLG Lift – 3-69
3.22 CHECKING THE FUEL
The engine may not be getting fuel to the carburetor
1. Check the fuel shutoff solenoid
a. Must have 12 volt while cranking the engine.
2. Check the electric fuel pump
a. Must have 12 volts or be able to hear the pump
running while cranking the engine.
b. Check fuel pressure, must have a minimum of
2-4lbs.
3. Check Fuel Filter:
NOTE: Some JLG machines have a fuel return line between
the fuel pump and carburetor, if this return line is
pinched and the fuel pressure increases this indi-
cates a clogged fuel filter.
4. Check the fuel pump supply line for any obstruction.
Try to start the engine.
NOTE: JLG Industries Inc. recommends the use of engine
block heaters and or cold weather packages for
machines intended for use in 0° F (-18° C) or colder
conditions. Refer to the JLG Parts Manual for specify
options for your machine.
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(Machines equipped with non-hydrostatic gear pump
or non-proportional drive systems, i.e. H models,
60HA should consider having block heaters and or
cold weather packages installed for use in 20° F (-
6.5° C) and colder conditions.