Maintenance and Cleaning
- Remove the battery before cleaning or performing maintenance work on the pump, before making tool adjustments, changing accessories or storing the pump. This safety measure prevents the pump from being started accidentally.
- Keep the pump clean to ensure effective, safe operation.
Replacing the impeller (see figure D)
Before commencing work, check the condition of the impeller (20) through the sight glass in the cover (15) of the pump housing. If there are visible cracks or melted surfaces on the impeller, the impeller is worn and must be replaced:
- Undo the four screws on the pump housing cover (15) using a size T20 Torx screwdriver.
- Remove the cover (15), the intermediate cover (18) and the sight glass (19).
- Remove the impeller (20) and the sealing ring (21).
- Clean the pump housing if necessary.
- Insert a new impeller (20) and a new sealing ring (21).
Only use parts intended by Bosch for this pump. - Pay particular attention to ensuring the sealing ring (21) is sitting correctly in the sealing groove.
- Place the sight glass (19), intermediate cover (18) and cover (15) on the pump housing.
- Screw the cover (15) back on using the four screws. Tighten the screws until hand-tight.
Storing the pump
When the pump is to be stored for a longer period of time, it is advisable to clean the impeller and the pump housing beforehand.
To remove and install the impeller, proceed as described for replacing the impeller.