Technical Information
109
G 1xxx/G 2xxx
2. Pump housing cap removal (Section 050-4.14).
3. Slide shutter removal (Section 050-4.15).
4. Remove the drive retaining screws (Figure 050-23, Item 1).
Figure 050-23: Drive Cam
Warning!
When re-installing, check that the O-ring is seated correctly on the drive cam.
Before re-installing the slide shutter in the pump housing, make sure that the
double tooth on the drive cog wheel points to the arrow on the housing.
4.17 Pump Impeller Removal
1. Remove the circulation pump; see Section 050-4.13.
2. Pump housing cap removal (Section 050-4.14).
3. Hold the shaft base with suitable pliers and unscrew the pump impeller
clockwise to remove.
4.18 Pump Housing Removal
1. Remove the circulation pump; see Section 050-4.13.
2. Pump housing cap removal (Section 050-4.14).
3. Pump impeller removal (Section 050-4.17).
4. Remove the screws securing the pump housing.
5. Turn the pump housing counterclockwise to its stop.
6. Lift the pump housing from its guide.