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Service Manual Mitsubishi L-Series diesel engines
Version 08/2004
MAINTENANCE
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GENERAL
5.4 Adjusting the fan belt tension
To check if the belt tension is appropriate, press the
belt at a midpoint between the alternator pulley and
crankshaft pulley with your thumb, and check that the
amount of belt deflection is about 10 mm [0.3937 in.]
(about 98 N (10 kgf) [22 lbf]).
5.5 Bleeding air from the fuel
system
Procedure
1. Loosen the air vent screw on the fuel filter.
2. For engine without feed pump, fuel flows down and
enters the fuel filter, wait for fuel to overflow from
the air vent screw. Then tighten the air vent screw.
3. For engine with the electromagnetic fuel pump,
turn the starting switch key to the ON position to
feed fuel to the fuel filter. Loosen the air vent screw
on the filter and, after bleeding air, tighten the air
vent screw.
4. Loosen the air vent screw on the fuel injection
pump to let air bleed from the fuel pipe and fuel
injection pump.
5. Air in the injection pipes and nozzles is driven out
automatically by cranking the engine.
Figure 12 Adjusting fan belt tension
Approx: 10 mm
[0.3937 in.]
(98 N (10 kgf) [22 lbf]
of thumb force)
Figure 13 Fuel filter air bleeding
Figure 14 Fuel injection pump air bleeding
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