Service Manual

10
1
MAY 2002
Section 10
Fuel System and Related Components
Section Contents
Page
GENERAL INFORMATION 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FUEL SYSTEM COMPONENTS 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INJECTION PUMP TIMING SPECIFICATIONS 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INJECTOR PUMP
Checking Injector Pump Timing 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjusting Injector Pump Timing 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INJECTORS
Remove Injectors 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Injectors 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Injectors 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FUEL FILTER – GENERAL 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Draining Water Collector 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Change Fuel Filter 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FUEL SHUT OFF SOLENOID 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Fuel Shut-Off Solenoid Wiring 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INJECTOR PUMP IDENTIFICATION 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ENGINE SPEED IDENTIFICATION CHART 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjust Idle Speed 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjust Top No Load Speed 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BRIGGS & STRATTON DAIHATSU 3 CYLINDER
LIQUID-COOLED DIESEL ENGINE REPAIR MANUAL (MS-1055)
The fuel system consists of a gear driven injector pump with fuel delivery and return lines and injector nozzles for each
cylinder. Diesel fuel is drawn from the fuel tank through the fuel filter by the feed pump which is incorporated in the
injection pump and delivers fuel to the injectors at a constant volume regardless of pump RPM. The feed pump also
circulates fuel through the pump for lubrication purposes.
A single pump plunger meters and distributes fuel in the correct firing order through an injector nozzle in each combus-
tion chamber. Excess fuel from the injector nozzles and pump is returned to the fuel tank by way of the overflow valve
and return line. This system of fuel circulation lubricates and cools the injection pump and also warms the fuel in the
fuel tank to help prevent fuel waxing in cold weather.
CAUTION: Always use clean fresh diesel fuel with a minimum of 40 cetane. DO NOT use kerosene. The injection
pump requires diesel fuel for lubrication. Damage to the injection pump and/or engine may result if kerosene is used.
Servicing the fuel injection system requires highly specialized equipment and procedures. Consult the Yellow Pages
under Engines-Diesel-Fuel Injection Service & Parts for the nearest diesel fuel injection specialist if the injector pump
or injector nozzles require servicing.
See Section 3 for procedure for removing and installing injector pump.