Mitsubishi Heavy Industries L2, Service Manual

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24 / 155 Service Manual Mitsubishi L-Series diesel engines
Version 08/2004
ENGLISH
MAINTENANCE GENERAL
5.6 Replacing the fuel filter
5.6.1 Cartridge type
Replace the cartridge type filter as an assembly if
accumulation of dust or water is in its element. Regular
replacement interval is every 500 service hours of
engine operation. Check the filter every 100 service
hours and, if necessary, replace early.
5.6.2 Separate type filter with cock
Close the filter cock, remove the ring nut, and take out
the element from the inside of filter. Clean or replace
the element.
5.6.3 Fuel pump
The following three types of fuel pumps are available.
Which type of pump is to be used for an engine
depends upon engine specification.
1. Plunger type electromagnetic pump
The plunger-type pumps are classified as the com-
mon, large-sized pump having a filter element or
as the compact lightweight, low-priced pump with-
out filter element. Regardless of classification,
check the plunger-type pump for normal function
and make sure that it does not leak fuel. Only on
the pump with filter element, remove the cover and
clean or replace the filter element.
Figure 15 Cartridge type filter
Figure 16 Plunger type (common) fuel pump
Figure 17 Plunger type (compact) fuel pump
Filter
Magnet
Cover