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Replacing filter element
Note:
Shutoff devices for urea solution lines must
be provided on-board.
1.
Shut off supply and return line from pre-feed
module to tank.
Note:
Clean with high-pressure cleaner / steam-jet
cleaner as necessary.
2.
Clean supply unit prior to opening.
Note:
When removing the filter housing, small
amounts of urea solution can escape.
3.
Loosen filter housing (5) with built-in seal (4)
using a torque wrench and remove.
Note:
When removing the frost compensating dia-
phragm (3), small amounts of urea solution
can emerge.
4.
Pull frost compensating diaphragm (3) from
pump housing (1).
5.
Remove filter element (2) by turning and
lightly pulling from pump housing (1).
Note:
No contamination or other foreign bodies
must enter the supply unit.
6.
Clean the supply unit with a dry, clean lint-
free cloth.
Installing filter
Note:
Only use new parts.
1.
Check parts of spare parts kit for:
• Completeness
• Presence of housing vent in filter housing
bottom (5)
• Presence of frost compensating dia-
phragm (3) and seal (4) in filter housing (5)
• Cleanness of sealing surface on pump
housing (1)
2.
Fit filter element (2) via the pin on the pump
housing (1) and press in until it will not go
any further.
Note:
The groove on pump housing must be free of
any dirt and debris.
3.
Fit the frost compensating diaphragm (3)
over filter cartridge (2) onto pump hous-
ing (1).
4.
Sealing bead of the frost compensation dia-
phragm (3) must be seated all-round, com-
pletely and firmly in the groove of the pump
housing (1).
5.
Spray the full circumference of the frost com-
pensation diaphragm (3) with lubricant spray.
6.
Similarly, coat the thread on the pump hous-
ing (1) with lubricant spray.
7.
Place filter housing (5) onto pump housing (1)
and screw on.
MS150123/01E 2017-05 | Exhaust Gas Aftertreatment | 175
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Troubleshooting
