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LP-POWERED MACHINES
LP FUEL SYSTEM
The LP fuel system consists of several components not found on the gasoline system. The LP fuel system also
contains the associated mounting hardware and plumbing for the LP components. The major LP components are
as follows (these components are factory set, adjustments to these components should only be made by autho-
rized service personnel):
1. Throttle plate & mixer
2. Combination water-heated vaporizer & regulator
3. LP fuel tank, valves & fittings
EPM
REGULATOR
PRESSURE RELIEF
MIXER
LP FUEL TANK
PRESSURE RELIEF VALVE
FUEL LOCK
FIGURE 16
lpexport
LP VAPOR WITHDRAWAL SYSTEM
The liquid fuel flows from the tank under its own pressure to the pressure relief valve. This valve is normally
closed, which prevents fuel from escaping into the atmosphere. When the engine is running, LP then flows
through the open fuel lock (lock automatically closes when engine is shut down) and into the vaporizer/regulator
where it is converted to a gaseous state. (The regulator reduces the tank pressure and makes the flow more
constant.) The LP is then piped into the mixer where it is introduced into the air flow and sent to the combustion
chamber.
LP VAPORIZER-REGULATOR QUICK CHECK
Turn on the ignition switch and open the radiator cap. Check the coolant for bubbles. If bubbles are present, the
vaporizer may have a leaking gasket or may have developed a pinhole leak, allowing the LP fuel to enter the
cooling system.
1-24
American-Lincoln
3366XP
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