MAINTENANCE OF MAJOR COMPONENTS
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4.3. Fuel Injection Pump
4.3.1. General information of fuel system
The fuel system consists of the fuel tank, injection pump, injection nozzle, fuel filter, and fuel
lines such as pipes and hoses necessary to connect those components.
4.4.2. Injection pump
The components relating to the injection pump should be serviced at regular intervals as the plunger and
delivery valve may be worn after a given length of time for use and cause the deterioration of the engine.
Make sure that servicing should be performed at the professional maintenance shop as authorized by Bosch or
Zexel Company.
For adjustment of fuel injection volume, refer to the ‘Specifications of fuel injection pump’ described on the
following pages.
1. Fuel filter 7. Fuel injection pipe
1a. Fuel water drain plug 8. Fuel pipe (manual pump
→
filter)
2. Air bleeding screw (for fuel filter) 9. Fuel tank
3. Injection nozzle 10. Fuel return pipe
4. Overflow tube 11. Suction pipe
5. Fuel pipe (filter
→
injection pump) 12. Feed pump
6. Overflow valve 13. Injection pump
3
8
9
4
7
12
10
11
5
2
1
1a
EQM4011I
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