If the fuel pressure was built up using hand
pump =
on the main filter, you must start the
engine within 5 seconds. Otherwise, the fuel
pressure decreases and you will have to
repeat the procedure.
X
Press the handle of hand pump = on the
main filter approximately 250 times in
approximately
3 minutes or until there is
noticeable resistance.
X
Press the external engine start/engine
stop switch
(Y page 372) within approx-
imately 5 seconds and start the engine.
X
If the engine starts: leave the engine run-
ning at an increased engine speed.
X
If the engine does not start: repeat the pro-
cedure.
X
Tilt the cab back into the driving position.
X
Tighten the fuel tank filler cap.
X
Mount covering :.
Bleeding the fuel system without fuel
prefilter on chassis frame (OM 936
only)
X
Press the Start/Stop button as far as it will
go
and hold it. Do not depress the acceler-
ator pedal whilst doing so.
i
The starting procedure is automatically
cancelled
after approximately 60 seconds.
X
Once the engine starts normally, release
the Start/Stop button and depress the
accelerator pedal several times.
The fuel system is completely bled.
X
If the engine does not start: hold the Start/
Stop button pressed down to the stop
again.
Bleeding the fuel system with fuel pre-
filter on the chassis frame
H
Environmental note
Dispose of the water-fuel mixture in an envi-
ronmentally responsible manner.
Fuel prefilter on the chassis frame (example: plat-
form truck)
:
Fuel prefilter
;
Drain plug
=
Inspection window
?
Manual fuel pump
A
Bleed screw
Bleeding using the hand pump of the fuel
prefilter on the chassis frame
X
Unscrew the fuel tank filler cap.
X
Place the collector underneath fuel prefil-
ter :.
X
Unscrew bleed screw A.
X
Push hand pump ? repeatedly until the
fuel escaping at bleed screw A is free of
bubbles.
X
Tighten bleed screw A.
i
If
there was no fuel in the fuel tank, press
hand pump ? again until there is noticea-
ble resistance. Vehicles with
OM 470/471/473: bleed also using the
hand pump on the main filter (Y page 373).
X
Tighten the fuel tank filler cap.
X
Press the Start/Stop button as far as it will
go
and hold it. Do not depress the acceler-
ator pedal whilst doing so.
i The starting procedure is automatically
cancelled:
R
after approximately
60 seconds on vehi-
cles with the OM 936 engine
R
after approximately 40 seconds on vehi-
cles with the OM 470 471 or OM 473
engine.
374
Engine
Breakdown assistance
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