MAINTENANCE
3-23
275 SERIES II MM190 (12---89)
FUEL SYSTEM -- GASOLINE
FUEL FILTER
The fuel filter traps fuel impurities. It is located below
the air filter. Replace the filter element as required.
CARBURETOR
The carburetor has two basic adjustments. Those
adjustments are idle fuel mixture and idle speed.
Check and adjust idle fuel mixture and idle speed
after every 400 hours of operation. The idle fuel
mixture is controlled by a screw located on the front
of the carburetor. Turning the screw in, clockwise,
leans the fuel mixture. Turning the screw
counter-clockwise, richens the fuel mixture.
The idle speed is controlled by a screw located on
the side of the carburetor next to the throttle linkage.
Turning the screw clockwise increases engine
speed. Turning the screw out, counterclockwise,
decreases engine speed. Proper idle speed is 950 +
50 rpm with all accessories in the “off” position.
WARNING: Fuel vapor is present when
servicing fuel system. Fire or explosion can
result. Keep flames and sparks away.
FUEL SYSTEM -- LPG
LPG FUEL SYSTEM
The liquid withdrawal LPG fuel system is made up of
five components which are: the LPG fuel tank,
pressure relief valve, fuel filter lock,
vaporizer-regulator, and the carburetor.
Liquid LPG fuel flows from the LPG tank, under its
own pressure, to the pressure relief valve. This valve
is normally closed, preventing LPG fuel from
escaping into the atmosphere. The valve opens to
relieve pressure if the fuel pressure exceeds system
limits. From the pressure relief valve, the liquid LPG
fuel is piped to the fuel filter lock.
The fuel filter lock filters unwanted tank scale and
deposits out of the LPG fuel. The fuel filter lock also
stops the flow of LPG fuel when the engine is not
operating. The oil pressure switch controls the fuel
filter lock. When the engine oil pressure is
5 psi (35 kPa) or greater, the oil pressure switch
permits an electrical current to open the fuel filter
lock which allows LPG fuel to flow on to the
vaporizer-regulator. The oil pressure switch is
bypassed when the engine is being started, allowing
LPG fuel to flow.
The vaporizer section of the vaporizer-regulator
converts the liquid LPG fuel into a gaseous LPG fuel.
From the vaporizer section, the gaseous LPG fuel is
sent to the primary regulator section of the
vaporizer-regulator. The primary regulator section
reduces the pressure of the LPG fuel. The secondary
regulator section reduces the LPG fuel pressure to
the level required by the carburetor. From the
vaporizer-regulator, the LPG fuel is sent to the
carburetor where it is finally metered into the air flow
which is sent to the engine combustion chamber.
Содержание 275 Series II
Страница 1: ...r 275 Series II Sweeper Scrubber ...
Страница 6: ...ABOUT THIS MANUAL 275 SERIES II MM190 12 89 d ...
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Страница 22: ...SPECIFICATIONS 1 6 275 SERIES II MM190 12 89 ...
Страница 24: ...OPERATION 275 SERIES II MM190 12 89 2 2 ...
Страница 74: ...MAINTENANCE 3 14 275 SERIES II MM190 12 89 04644 HYDRAULIC SCHEMATIC LOW DUMP MODEL ...
Страница 75: ...MAINTENANCE 3 15 275 SERIES II MM190 12 89 04645 HYDRAULIC SCHEMATIC MULTI LEVEL DUMP MODEL ...
Страница 97: ...MAINTENANCE 3 37 275 SERIES II MM190 12 89 04643 ELECTRICAL SCHEMATIC DIESEL ...
Страница 98: ...MAINTENANCE 3 38 275 SERIES II MM190 12 89 04642 ELECTRICAL SCHEMATIC ACCESSORIES ...
Страница 99: ...MAINTENANCE 3 39 275 SERIES II MM190 6 90 06187 ELECTRICAL SCHEMATIC AUTO SHAKER RFS ...
Страница 100: ...MAINTENANCE 3 40 275 SERIES II MM190 6 90 06187 ELECTRICAL SCHEMATIC AUTO SHAKER RFS ...
Страница 130: ...APPENDIX 275 SERIES II MM190 12 89 4 2 ...