Operation Manual

6
© 2002
!
6.2.8 Clean / purge or change fuel
pre-filter
Clean (purge) - remove water:
● Turn off engine or, in the case of a change-
over filter, switch over to the other filter.
● Close the fuel stopcock or supply. (if
available)
● Open the bleed screw 1 on the cover 2
● Place the fuel collector underneath the fuel
pre-filter.
● Empty water and dirt from the bowl 6 by
opening (press in and turn slightly without
using force) the drain cock 8 and close the
drain cock 8 again
● Close the bleed screw 1 on the cover 2
again
● Bleed the fuel pipe according to
instructions, see 6.2.5 opposite
Changing the filter element 5:
Change at least once a year or as required
(drop in performance also after purging)
● Turn off the engine or switch to other filter
in case of changeover filter
● Close the fuel stopcock or supply (if
available)
● Loosen the cover screws 3 diagonally
● Remove the cover 2
● Remove the spring cassette 4
● Remove the filter element 5 from the bracket
● Insert new filter element 5
● Place spring cassette 4 on the element
● Check that the cover seal is fit properly in
the cover 2 and check for damage (change
if necessary)
● Tighten the cover 2 with the screws 3
diagonally (torque 6 Nm)
● Check the cover 2 for proper fit and leaks
● Bleed the fuel system, see 6.2.3.
Naked flames are prohibited
when working on the fuel
system! Do not smoke!
Dispose of old fuel in an environ-
mentally friendly way!
6.2.9 Venting the Fuel System
with Preliminary Fuel Filter
● During initial commissioning, after
maintenance work or if the tank is run
empty it is essential to vent the fuel system.
● Set engine controller to stop position
● Place fuel collecting trough under the
pressure control valve 9.
● Open fuel stopcock (if available) and
pressure control valve 9.
● Turn engine with starter (max. 20 sec.) or
use hand fuel pump (if available), until fuel
with no air bubbles escapes from pressure
holding valve 9.
● Tighten pressure control valve 9.
● Set engine controller to start position and
start
● When the engine has started check for
leaks
The connection of a warning system
(lamp/horn) via contacts 7 is
specified. Immediate maintenance is
necessary when the warning system is
triggered.
© 31 811 2
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© 31 812 0
6.2 Fuel System Service and Maintenance