Fuel Injection Pump / Governor; Introduction; Fuel Injection Pump; Fuel System Diagram - Yanmar 2TNV70 Service Manual

7. Fuel Injection Pump / Governor

7. FUEL INJECTION PUMP / GOVERNOR

7.1 Introduction

A fuel injection pump is the most important device
which adjusts an injection quantity precisely
corresponding to the change of engine load.
Therefore, not only a very precise machining should
be necessary all parts but also the assembling,
adjustment which top-level is excellent in should be
necessary.
The careful consideration to avoid dust and rust at the
time of disassembly, adjustment, reassembly of the
fuel injection pump in the market is necessary.
Fuel injection pumps manufactured by Yanmar,
YPES-ML type series are inline type.
A cam shaft is driven through the timing gear, and
mechanical type fuel feed pump driven by a cam shaft
sends fuel to the fuel filter from the fuel tank.
The fuel which passed through the fuel filter is
supplied to the storeroom of the pump housing, and
the pressure of the fuel rises by the plunger The fuel
passes through the fuel high pressure pipe and the
fuel is injected to each cylinder from the fuel injection
nozzle.
The manual of the separate volume is referred to for
the disassembly and assembly, adjustment procedure
of only the YPES-ML type fuel pump.

7.2 Fuel Injection Pump

7.2.1 Fuel system diagram

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