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Replacing fuel prefilter with low pressure, version A
Note:
• During engine operation, the filter elements must only be replaced on the cut-out filter module!
• At engine standstill, the filter elements on both filter modules can be replaced!
1.
Provide a suitable container in which to collect the fuel.
2.
During engine operation, turn the switchover
level as far as the stop (arrowed) to cut out
the filter module to be serviced.
Result:
• Filter module (1) is cut in
• Filter module (2) is cut out
3.
Check fuel level in filter.
Result:
If the fuel level is stable, the filter can be
changed!
4.
If the fuel level falls, the switchover point is
leaking. Screw on the filter cover again imme-
diately and vent the filter (→ Page 244).
Check the switchover point, contact Service.
Note:
• As soon as the filter housing is opened,
absolute cleanness is imperative!
• Carefully extract the filter element straight
up avoiding contact with the upper edge of
the cylinder if at all possible to prevent
contamination of the fuel remaining in the
filter housing.
5.
Unscrew filter cover (1) and withdraw with fil-
ter element (3) from filter housing (4).
6.
Unclip filter element (3) from filter cover (1).
7.
Install new O-ring (2) on filter cover (1).
8.
Coat new O-rings on filter cover and filter ele-
ment with fuel.
9.
Clip new filter element (3) into filter cover (1).
10.
Screw filter cover (1) into filter housing.
Result:
Filter cover (1) must lie flat on the housing
(4).
11.
Use a torque wrench to tighten filter cover (1) to specified tightening torque.
Name
Filter cover
12.
Replace other filter elements in the same way.
13.
Close threaded vent plug again.
14.
Vent fuel prefilter (→ Page 244).
15.
Check fuel prefilter for leaks.
242 | Fuel Filter | MS15065/01E 2019-01
Size
Type
Tightening torque
Lubricant
Value/Standard
40 Nm
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