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Service Manual Mitsubishi L-Series diesel engines
Version 08/2004
MAINTENANCE
ENGLISH
GENERAL
2. Diaphragm type electromagnetic pump
The diaphragm type electromagnetic pump should
not be disassembled. Like the compact plunger-
type pump mentioned above, check the pump for
functions and fuel leak.
3. Mechanical type fuel pump
This type of fuel pump is installed with an adapter
on the rear-end side of the fuel injection pump
camshaft. As the camshaft rotates, the fuel pump
cam pushes the tappet to actuate the diaphragm of
the fuel pump. This type of fuel pump is provided
with a priming lever to allow manual feed to fuel.
Check the fuel pump for normal function and make
sure that it does not leak fuel or make unusual
noise.
5.6.4 Draining water from the water
sedimentator
For engine provided with a water sedimentator, remove
the filter ring nut involved and take out the cup. Wipe off
water and dust accumulated in the cup.
Figure 18 Diaphragm type fuel pump
Figure 19 Mechanical type fuel pump
Camshaft, fuel
injection pump
Adapter
Fuel pump
Primer lever
Pump type Delivery flow
Shut-off
pressure
Plunger type
(common)
0.9 l
[0.24 U.S.gal]/ min
or more
0.03 MPa
(0.35 kgf/cm
2
)
[4.98 psi]
Plunger type
(compact)
0.4 l
[0.11 U.S.gal]/ min
or more
0.03 MPa
(0.35 kgf/cm
2
)
[4.98 psi]
Diaphragm
type
0.37 l
[0.10 U.S.gal]/ min
or more
0.01 MPa
(0.15 kgf/cm
2
)
[2.13 psi]
Mechanical
type
0.255 l
[0.06 U.S.gal]/ min
or more
0.01 MPa
(0.15 kgf/cm
2
)
[2.13 psi]
Table 11 Fuel pumps at 12V (electromagnetic
pumps only) and at 20°C [68°F]
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