JLG 340AJ, Service And Maintenance Manual

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SECTION 3 - CHASSIS & TURNTABLE
3-90 – JLG Lift – 3121259
3.19 FUEL RESERVE / CUT-OUT SYSTEM
The Fuel Shutoff System senses when the fuel level is getting
low and automatically shuts the engine down before the fuel
tank is emptied. When the fuel level gets below 1.3 gallons (4.9
L), the fault light will flash at the platform controls and the
control system will report fault 0031 "FUEL LEVEL LOW -
ENGINE SHUTDOWN" on the analyzer.
There is an analyzer personality setting in the control system
to control the machines response to this fault. If this personal-
ity setting is set to "ENGINE STOP", the machine will remain in
this fault mode until the fuel level is returned to a level above
1.3 gallons (4.9 L). If the personality setting is set to "1
RESTART", the operator will be able to start the engine and run
for 1 minute. After 1 minute, the engine will shut off for a sec-
ond time and the machine will return to the "Engine Shut-
down" fault mode. The machine will then stay in this mode
until the fuel level is returned to a level above 1.3 gallons (4.9
L).
3.20 COLD START SYSTEM (DIESEL ENGINE)
The machine control system monitors the engine coolant and
ambient temperature to make an estimate of cylinder preheat-
ing requirements. If the coolant temperature is below 50° C
(122° F) and the battery has sufficient voltage when control
power is turned on, the glow plugs will be automatically fired
for a duration that is based on the ambient temperature. Dur-
ing this preheat period, the glow plug indicators will flash. The
glow plugs will be turned off before the engine begins to
crank.
3.21 GENERATOR
See Figure 3-72., Generator.
An optional generator is available to supply electrical power to
the platform. It is controlled by a switch in the platform.
VOLTAGE REGULATOR
CONTROL BOX
GENERATOR
ASSEMBLY
Figure 3-72. Generator