JLG M450 Service Manual - Manual (Page 104)

SECTION 3 - CHASSIS & TURNTABLE
3-64 – JLG Lift – 3121829
Fuel Pump
The fuel pump runs in parallel with the fuel solenoid hold
coil which is run by the fuel control relay.
The pump runs whenever the engine runs, and keeps the
fuel filter filled. Excess fuel flows through the return line
back to the fuel tank.
The fuel pump is located on the right side of the engine.
Fuel Solenoid
The fuel solenoid actuates the run/stop lever of the
engine. This solenoid has a pull coil energized by the start
control relay and a hold coil energized by the fuel control
relay.
The fuel solenoid is located on the right side of the engine.
Engine Low Oil Pressure Switch
The engine is equipped with a low oil pressure switch.
This switch is closed when the oil pressure is below 7psi.
It is mounted on the side cover.
Engine Oil Temperature Sensor
The engine oil temperature sensor is used to sense the
temperature of the oil in the sump of the engine.
This sensor provides an analog signal to the engine/gen-
erator controller. The primary use of this signal is for high
engine temperature shutdown 248°F (120°C) for the