10. CYLINDER HEAD
Tightening order of bolts
Tightening torque of cylinder head studs: 118 ± 5 Nm
Technical Data
Tappet clearance cold 0.25 mm inlet & exhaust
Injection pressure 120 bar + 10 bar
Compression pressure new 30 bar Lower limit: 26 bar
Injection timing 22° before top dead centre
Oil pressure, service temperature 2 - 4 bar (under load) ± 0,5 bar
Tightening torques: bolts / nuts, general
Thread Quality class 4 Quality class 7
M 6 4 Nm 9 Nm
M 8 11 Nm 18 Nm
M 10 21 Nm 35 Nm
M 12 35 Nm 64 Nm
M 14 60 Nm 93 Nm
3.800.01/01.2007
12. Remove fuel lines
âą Remove pipe clamp (E) from the injection
lines (F). Unscrew lines (F) at the injection
pump and at the injection nozzles (G).
âą Unscrew the drain oil lines (H) at the injection
nozzles (G) by slackening the nuts (J).
Mount protective caps to protect the
fuel system against dirt or foreign
particles at the pump and injection
nozzles !
Removal of the injection nozzles
âą Screw out the injection nozzles (G) of the
engine by means of a socket wrench.
Remove the injection nozzle seals
with a wire or a screwdriver and
dispose of according to regulations.
3.800.02/01.2007
14. Removal of the injection pump
âą Check the alignment of the marking on
the injection pump with the marking on
the flange.
âą Remove the front cover of the injection
pump gear.
âą Make markings (K) at the idler gear and
injection pump gear.
âą Slacken the bolts of the intermediate
flange and remove the injection pump
including the intermediate flange and
gear.
Make sure that the engine does not
turn after the removal of the injec-
tion pump.
To remove the gear of the injection
pump, slacken the nut of the gear
prior to the removal of the pump.
Check the injection timing
âą Adjust the piston no. 1 to top dead
centre.
3.800.03/01.2007
flange marking
injection pump
marking
injection pump gear
17. 3) Adjustment of the injection timing
a) If the injection timing must be changed,
turn the injection pump as shown in the
illustration opposite.
b) Only the setscrew for max. engine
speed is sealed.
c) If this setting is checked and adjusted,
please ensure that there is somebody
near the engine to be able to operate
the engine cut-off mechanically in case
of engine overspeeding.
d) A marking unit at the injection pump
flange changes the injection timing by
6° to the crankshaft angle.
Off-load min. speed (idle running
speed) and max. speed setting
For inspections and settings warm the
engine up thoroughly until the coolant and
engine oil temperatures are higher than
70°C (158° F).
3.800.05/01.2007
a) The off-load min. speed (idle running
speed) as well as the max. speed of
each engine are set on the test
bench in the factory. The setscrew
for max. speed is sealed. These
settings are to be performed by an
authorised workshop only.
b) After removing the leaden seals and
adjusting the regulator, all visisble
stops are to be sealed as though
they would have been sealed by the
factory.
c) It is decisive for the settlement of
warranty claims whether the stop
screw leaden seals are alright or not.
d) When this setting is checked and
adjusted, please make sure that
there is somebody near the engine
in order to be able to stop engine
mechanically in case of engine
overspeeding.
injection timing
earlier
injection
timing later
18. 1) Engine start-up
a) Set speed adjusting lever to high idle
running speed. Actuate starter.
b) The engine fires from a crankshaft
speed of 150 min-1
. When the engine is
running, the speed is to be held
between 800 and 1,000 min-1
.
c) When the engine is running with
constant speed, the speed adjusting
lever is to be brought into idle running
position.
2) Set off-load low idle running speed
a) Hold the speed adjusting lever in off-
load min. speed position and set low
idle running speed by means of the
setscrew (2)
b) Engine speed increase:
Turn the setscrew of the low idle
running speed clockwise.
To be performed by trained and
qualified personnel only:
c) In case of speed variations (fluctuations
of the engine), turn the setscrew (3) of
the idle running speed spring clockwise
to increase the spring preload.
In case of a critical speed (speed
resulting in bad engine vibrations
due to torsional oscillations), a
higher or lower speed range is to
be chosen.
An excessive spring preload
results in engine overspeeding
with the load decreasing. Make
sure that this is prevented.
Mitsubishi S 4 Q
Datum/Edition/Date
01.2007
Engine control
Blatt/Page/Feuille
3.800.06
19. 3) Set max. output (capacity)
To be performed by trained and
qualified personnel only:
a) Bring speed adjusting lever into full load
position and load engine with its
indicated output.
b) While the engine is running with
constant speed, adjust the full load stop
screw in such a manner that the engine
achieves its indicated output.
c) If the full load stop screw is turned
counter-clockwise, the capacity is
reduced, and the engine speed is
lowered.
If the full load stop screw is turned
clockwise, the capacity is increased,
and the exhaust gas values deteriorate.
This setting can only be performed
on the test bench as it is sealed by
the factory.
3.800.06/01.2007
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