Fuel Filter; Fuel Filter Specifications; Fuel Filter Inspection - Yanmar 3JH4E Service Manual

6. FUEL INJECTION EQUIPMENT

6.3 Fuel Filter

The fuel filter is installed between the fuel feed pump
and fuel injection pump, and removes dirt/foreign matter
from the fuel pumped from the fuel tank.
The fuel filter element must be changed periodiically.
The fuel pumped by the fuel feed pump goes around
the element, is fed through the pores in the filter and
discharged from the center of the cover. Dirt and foreign
matter in the fuel are deposited in the element.

6.3.1 Fuel filter specifications

Filtering method
Filtering area
Maximum flow
Pressure loss
Max. dia. or unfiltered particle

6.3.2 Fuel filter inspection

The fuel strainer must be cleaned occasionally If there is water or foreign matter in the strainer bowl,
disassemble the strainer and wash with clean fuel oil to completely remove foreign matter. Replace the
element every 250 hours of operation.
Replace the filter prior to this if the filter is very dirty, deformed or damaged.
filter paper
2
840 cm
1.5 L/min
20 mm Hg or less
10 μ
10
(0.3937)
75
M20 X 1.5 Make sure there are
3.5 effective threads
136
Inlet from Outlet to fuel
feed pump injection pump
8-
38
Fuel return pipe
joint bolt
(Auto air bleeding)
Element
6 hole