16 19 130 Removing and Installing/Replacing Pump Unit

16 19 130 Removing And Installing/Replacing Pump Unit







IMPORTANT:
Ensure adequate ventilation in the workbay.
Avoid skin contact (wear gloves).
Avoid eye contact (safety goggles).
Urea/water mixture can escape when components carrying urea/water mixture are released. Have a collecting vessel ready.
Observe country-specific waste disposal regulations.







IMPORTANT:
Maintain conditions of absolute cleanliness.
Connections and covers of lines carrying urea/water mixture must be cleaned thoroughly with water after each removal or before each installation.
Thoroughly clean the working area with water after repair work.
Use fluff-free cloths for cleaning (see ETP Electronic Parts Catalogue WAYPALL L20 cleaning cloths).
Close connections and lines.
Thoroughly clean special tool with water after each use.







Necessary preliminary work:
- Remove side right underbody panelling.







Release plastic nuts (1).

Installation note:
Check plastic nut, replace if necessary.
Tightening torque 16 19 1AZ.
Disconnect plug connection (2).
Remove pump unit (3) from body.







Disconnect SCR filter (1) on pump unit (2).
Disconnect line (3).
Remove pump unit (2).

Installation note:
Secure SCR filter (1) on pump unit (2).
Check by pulling engagement of SCR filter (1).
Secure pump unit (2) to body.







Connect urea/water mixture extractor unit (refer to BMW Service Workshop Equipment) to connection (1).

IMPORTANT: Do not pressurize urea/water mixture extractor unit.

With aid of BMW Diagnosis and Information System:
- Activate pump unit until urea/water mixture flows through suction line

Connect line to connection (1) and check correct seating by pulling.